USER MANUAL

Serinus 50
Sulfur Dioxide Analyser
Version: 3.3

acoem.com
Ecotech Pty Ltd is now part of the Acoem Group and as such,
the branding of our instruments & software has also changed
to ‘Acoem’.

Over time we will be updating the content of all documents to

reflect the Acoem branding convention.

In the interim, please note that while the cover of this document
features Acoem branding, information contained within its
pages still utilises the original ‘Ecotech’ name.
This page is intentionally blank
Table of Contents
Manufacturer’s Statement .................................................................................................................................... 13
Notice .................................................................................................................................................................... 13
Safety Information ................................................................................................................................................. 14
Important Safety Messages ................................................................................................................................... 15
Warranty ................................................................................................................................................................ 16
Service & Repairs ................................................................................................................................................... 17
Product Compliance and Approvals ....................................................................................................................... 18
Manual Revision History ........................................................................................................................................ 19

1. Introduction ........................................................................................................................... 21
1.1 Description ................................................................................................................................................ 21
1.2 Specifications ............................................................................................................................................ 21
1.2.1 Measurement ............................................................................................................................ 21
1.2.2 Precision/Accuracy .................................................................................................................... 21
1.2.3 Calibration ................................................................................................................................. 22
1.2.4 Power Requirements ................................................................................................................. 22
1.2.5 Operating Conditions ................................................................................................................. 22
1.2.6 Communications ........................................................................................................................ 23
1.2.7 Physical Dimensions................................................................................................................... 23
1.2.8 Certifications .............................................................................................................................. 23
1.3 Nomenclature ........................................................................................................................................... 24
1.4 Background/Theory ................................................................................................................................... 25
1.4.1 Measurement Theory ................................................................................................................ 25
1.4.2 Kalman Filter Theory .................................................................................................................. 26
1.5 Instrument Description ............................................................................................................................. 27
1.5.1 Calibration Valve Manifold ........................................................................................................ 27
1.5.2 Sample Filter Holder .................................................................................................................. 28
1.5.3 Dual Hydrocarbon Kicker ........................................................................................................... 28
1.5.4 Zero Air Scrubber ....................................................................................................................... 29
1.5.5 DFU ...................................................................................................................................... 29
1.5.6 Main Controller PCA .................................................................................................................. 29
1.5.7 Measurement Cell ..................................................................................................................... 30
1.5.8 Lamp Driver PCA ........................................................................................................................ 34
1.5.9 Pneumatic Tubing ...................................................................................................................... 34
1.5.10 Rear Panel .................................................................................................................................. 35
1.5.11 Communications ........................................................................................................................ 36

2. Installation ............................................................................................................................. 39
2.1 Initial Check ............................................................................................................................................... 39
2.2 Installation Notes ...................................................................................................................................... 42
2.3 Instrument Set-up ..................................................................................................................................... 43
2.3.1 Power Connections .................................................................................................................... 43
2.3.2 Pneumatic Connections ............................................................................................................. 44
2.3.3 Communications Connections ................................................................................................... 47
2.3.4 Instrument Set-up ...................................................................................................................... 48
2.4 U.S. EPA Equivalent Set-up ........................................................................................................................ 49

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 Ser in u s ® 50 U ser M an u al 3 .3

2.5 EN Type Approval Set-up .......................................................................................................................... 50

2.6 Transporting/Storage................................................................................................................................ 51

3. Operation ............................................................................................................................... 53
3.1 Warm-Up .................................................................................................................................................. 53
3.2 Measurement ........................................................................................................................................... 53
3.3 General Operation Information ................................................................................................................ 54
3.3.1 Keypad & Display....................................................................................................................... 54
3.3.2 Home Screen ............................................................................................................................. 56
3.4 Menus & Screens ...................................................................................................................................... 58
3.4.1 Quick Menu ............................................................................................................................... 59
3.4.2 Main Menu ................................................................................................................................ 60
3.4.3 Analyser State Menu ................................................................................................................. 61
3.4.4 Status Menu .............................................................................................................................. 62
3.4.5 Temperature Menu ................................................................................................................... 64
3.4.6 Pressure & Flow Menu .............................................................................................................. 65
3.4.7 Voltage Menu ............................................................................................................................ 65
3.4.8 General Settings Menu .............................................................................................................. 66
3.4.9 Measurement Settings Menu .................................................................................................... 67
3.4.10 Calibration Menu ...................................................................................................................... 69
3.4.11 Pressure Calibration Menu ........................................................................................................ 71
3.4.12 Flow Calibration Menu (Optional) ............................................................................................. 72
3.4.13 Service Menu............................................................................................................................. 73
3.4.14 Diagnostics Menu ...................................................................................................................... 74
3.4.15 Digital Pots Menu ...................................................................................................................... 75
3.4.16 Internal Pump Menu (Optional) ................................................................................................ 77
3.4.17 Valve Menu ............................................................................................................................... 78
3.4.18 Tests Menu ................................................................................................................................ 79
3.4.19 Digital Input Test Menu ............................................................................................................. 80
3.4.20 Digital Output Test Menu .......................................................................................................... 80
3.4.21 Calculation Factors Menu.......................................................................................................... 81
3.4.22 Communications Menu ............................................................................................................. 82
3.4.23 Data Logging Menu ................................................................................................................... 83
3.4.24 Serial Communication Menu ..................................................................................................... 84
3.4.25 Analog Input Menu ................................................................................................................... 85
3.4.26 Analog Output Menu................................................................................................................. 86
3.4.27 Digital Input Menu .................................................................................................................... 87
3.4.28 Digital Output Menu ................................................................................................................. 89
3.4.29 Network Menu (Optional) ......................................................................................................... 90
3.4.30 Bluetooth Menu ........................................................................................................................ 92
3.4.31 Trend Display Menu .................................................................................................................. 92
3.4.32 Chart ...................................................................................................................................... 93
3.4.33 Advanced Menu ........................................................................................................................ 95
3.4.34 Hardware Menu ........................................................................................................................ 96
3.4.35 Parameter Display Menu........................................................................................................... 97

4. Communications .................................................................................................................... 99
4.1 RS232 Communication.............................................................................................................................. 99
4.2 USB Communication ............................................................................................................................... 100
4.3 TCP/IP Network Communication (Optional) ........................................................................................... 101
4.3.1 Reading Network Port Setup ................................................................................................... 102

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 4.3.2 Setting Network Port Setup ..................................................................................................... 102
4.3.3 Port Forwarding on Remote Modem/Router Setup ................................................................ 103
4.3.4 Setup Airodis to Communicate with Serinus ........................................................................... 103
4.4 Analog and Digital Communication ......................................................................................................... 104
4.4.1 Analog Outputs ........................................................................................................................ 104
4.4.2 Analog Inputs ........................................................................................................................... 105
4.4.3 Digital Status Inputs ................................................................................................................. 105
4.4.4 Digital Status Outputs .............................................................................................................. 105
4.5 Logging Data ............................................................................................................................................ 107
4.5.1 Configure Instrument Internal Logging .................................................................................... 107
4.6 Using Airodis Software to Download Data .............................................................................................. 107
4.6.1 Connecting the Instrument to a PC.......................................................................................... 107
4.6.2 Installing Airodis ...................................................................................................................... 110
4.6.3 Configuring Airodis .................................................................................................................. 111
4.7 Serinus Remote App/Bluetooth .............................................................................................................. 116
4.7.1 Installation ............................................................................................................................... 116
4.7.2 Connecting to the Instrument ................................................................................................. 117
4.7.3 Instrument Control .................................................................................................................. 118
4.7.4 Real-Time Plot.......................................................................................................................... 119
4.7.5 Download................................................................................................................................. 120
4.7.6 Get Parameters ........................................................................................................................ 121
4.7.7 Preferences .............................................................................................................................. 122

5. Calibration ........................................................................................................................... 125

5.1 Overview ................................................................................................................................................. 125
5.2 Pressure Calibration ................................................................................................................................ 127
5.2.1 Full Pressure Calibration (Two Point Calibration) .................................................................... 127
5.2.2 Pressure Calibration (Ambient Only) ....................................................................................... 129
5.2.3 Pressure Calibration (Internal Pump Option Only) .................................................................. 130
5.3 Manual Background ................................................................................................................................ 131
5.4 Zero Calibration ....................................................................................................................................... 132
5.4.1 Calibration Port ........................................................................................................................ 132
5.4.2 Sample Port ............................................................................................................................. 133
5.4.3 Background Air Port ................................................................................................................. 133
5.5 Span Calibration ...................................................................................................................................... 134
5.5.1 Calibration Port ........................................................................................................................ 134
5.5.2 Sample Port ............................................................................................................................. 135
5.5.3 Manual Instrument Gain and Offset Adjustments ................................................................... 136
5.6 Precision Check ....................................................................................................................................... 136
5.7 Multipoint Precision Check ..................................................................................................................... 137
5.8 Flow Calibration (Internal Pump Option Only) ........................................................................................ 138
5.9 High Pressure Zero/Span Valve (Option) ................................................................................................. 139
5.9.1 Single Pressurised Calibration Option ...................................................................................... 140
5.9.2 Dual Pressurised Calibration Option ........................................................................................ 141

6. Service ................................................................................................................................. 145

6.1 Additional Safety Requirements for Service Personnel ........................................................................... 145
6.2 Maintenance Tools .................................................................................................................................. 145
6.3 Maintenance Schedule ............................................................................................................................ 146

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6.4 Maintenance Procedures ........................................................................................................................ 148

6.4.1 Particulate Filter Replacement ................................................................................................ 148
6.4.2 Clean Chassis Fan Filter ........................................................................................................... 151
6.4.3 DFU Replacement .................................................................................................................... 151
6.4.4 Leak Check............................................................................................................................... 152
6.4.5 Replacing the PMT Desiccant Packs ........................................................................................ 156
6.4.6 Replace Zero Air Scrubber ....................................................................................................... 157
6.4.7 Orifice Replacement ................................................................................................................ 159
6.4.8 UV Lamp Replacement ............................................................................................................ 160
6.4.9 Clean Pneumatics .................................................................................................................... 163
6.4.10 Pressure Sensor Check ............................................................................................................ 163
6.5 Bootloader .............................................................................................................................................. 164
6.5.1 Display Help Screen ................................................................................................................. 164
6.5.2 Communications Port Test ...................................................................................................... 165
6.5.3 Updating Firmware ................................................................................................................. 165
6.5.4 Erase All Settings ..................................................................................................................... 165
6.5.5 Start Analyser .......................................................................................................................... 165

7. Troubleshooting ................................................................................................................... 167

7.1 Flow Fault ............................................................................................................................................... 170
7.2 Noisy/Unstable Readings ........................................................................................................................ 171
7.3 Electronic Zero Adjust ............................................................................................................................. 172
7.4 Reaction Cell Temperature Failure ......................................................................................................... 173
7.5 USB Memory Stick Failure....................................................................................................................... 174
7.6 Technical Support Files ........................................................................................................................... 175

8. Optional Extras..................................................................................................................... 177

8.1 Dual Sample Filter (PN: E020100) ........................................................................................................... 177
8.2 Test Lamp (PN: E020103) ........................................................................................................................ 178
8.3 Network Port (PN: E020101)................................................................................................................... 178
8.3.1 Hardware Setup ...................................................................................................................... 179
8.4 Rack Mount Kit (PN: E020116) ................................................................................................................ 179
8.5 Internal Pump (PN: E020106) ................................................................................................................. 184
8.5.1 Hardware Setup ...................................................................................................................... 184
8.5.2 Internal Pump Pneumatic........................................................................................................ 184
8.5.3 Internal Pump Additional Components ................................................................................... 184
8.5.4 Internal Pump Removed Components .................................................................................... 185
8.5.5 Pressure Calibration Internal Pump Option ............................................................................ 185
8.5.6 Flow Calibration ...................................................................................................................... 185
8.5.7 Leak Check Internal Pump Option ........................................................................................... 186
8.5.8 Pump Control .......................................................................................................................... 186
8.6 Metric Fittings Kit (PN: E020122) ............................................................................................................ 186
8.7 Internal Zero and Span (PN: E020135) .................................................................................................... 186
8.7.1 IZS Specifications ..................................................................................................................... 187
8.7.2 IZS Setup.................................................................................................................................. 189
8.7.3 IZS Transporting/Storage ........................................................................................................ 190
8.7.4 IZS Calibration ......................................................................................................................... 191
8.7.5 IZS Service and Maintenance .................................................................................................. 192
8.8 High Pressure Zero/Span Valves ............................................................................................................. 195

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 8.9 Trace Level Instrument (PN: E020126) .................................................................................................... 195
8.9.1 Trace Specifications ................................................................................................................. 195
8.9.2 Trace Setup .............................................................................................................................. 196
8.9.3 Trace Operation ....................................................................................................................... 196
8.9.4 Trace Default Values ................................................................................................................ 197
8.9.5 Trace Calibration Guidelines .................................................................................................... 197
8.9.6 Trace Service and Maintenance ............................................................................................... 198

9. Parts List and Schematics .................................................................................................... 199

9.1 Serinus Accessories Kit ............................................................................................................................ 199
9.2 Maintenance Kit ...................................................................................................................................... 199
9.3 Consumables ........................................................................................................................................... 200
9.4 Instrument Parts List ............................................................................................................................... 201
9.4.1 Optional Extras Spare Part List................................................................................................. 206
9.5 Plumbing Schematic - (PN: D020003)...................................................................................................... 208
9.6 Internal Pump Plumbing Schematic - (PN: D020006) .............................................................................. 209
9.7 IZS Plumbing Schematic - (PN: D020053) ................................................................................................ 210
9.8 Block Wiring Schematic - (PN: D020105)................................................................................................. 212
9.9 IZS Block Wiring Schematic - (PN: D020123) ........................................................................................... 213
9.10 Optical Bench Assembly - (PN: H012130) ................................................................................................ 214
9.11 Reaction Cell Assembly - (PN: H012100) ................................................................................................. 215
9.12 Lamp Holder Assembly - (PN: H012120) ................................................................................................. 216
9.13 Dump Assembly - (PN: H012110) ............................................................................................................ 217
9.14 Permeation Oven Assembly - (PN: H012170) .......................................................................................... 218
9.15 Sample Filter Holder Assembly - (PN: H010160) ..................................................................................... 219
9.16 Calibration Valve Manifold Assembly - (PN: H010013-01) ...................................................................... 220
9.17 IZS Calibration Valve Manifold Assembly - (PN: H010056) ...................................................................... 221
9.18 Valve Assembly - (PN: H010042) ............................................................................................................. 222
9.19 High Pressure Valve Exploded View - (PN: H050043) .............................................................................. 223

List of Figures
Figure 1 – Simple Pneumatic Diagram ......................................................................................................................... 25
Figure 2 – Optical Measurement Theory ..................................................................................................................... 26
Figure 3 – Major Components of Serinus 50 ................................................................................................................ 27
Figure 4 – Calibration Valve Manifold .......................................................................................................................... 27
Figure 5 – Sample Filter Holder .................................................................................................................................... 28
Figure 6 – Dual Hydrocarbon Kicker ............................................................................................................................. 28
Figure 7 – Zero Air Scrubber......................................................................................................................................... 29
Figure 8 – DFU .............................................................................................................................................................. 29
Figure 9 – Measurement Cell ....................................................................................................................................... 30
Figure 10 – PMT Assembly - 1 ...................................................................................................................................... 30
Figure 11 – PMT Assembly - 2 ...................................................................................................................................... 30
Figure 12 – Reaction Cell Assembly - 1......................................................................................................................... 31
Figure 13 – Reaction Cell Assembly - 2......................................................................................................................... 32
Figure 14 – Reaction Cell Assembly - 3......................................................................................................................... 32
Figure 15 – Orifice ........................................................................................................................................................ 33

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Figure 16 – Lamp Driver PCA Type Jumper Setting (REV D) .......................................................................................... 34

Figure 17 – Ecotech Tubing........................................................................................................................................... 34
Figure 18 – Rear Panel .................................................................................................................................................. 35
Figure 19 – Power ON/OFF Switch ............................................................................................................................... 35
Figure 20 – Communication Connections ..................................................................................................................... 36
Figure 21 – Received Item ............................................................................................................................................ 40
Figure 22 – Opening the Instrument - 1 ....................................................................................................................... 41
Figure 23 – Opening the Instrument - 2 ....................................................................................................................... 41
Figure 24 – Opening the Instrument - 3 ....................................................................................................................... 41
Figure 25 – Opening the Instrument - 4 ....................................................................................................................... 42
Figure 26 – Instrument Rear Panel ............................................................................................................................... 43
Figure 27 – Connect Power Cord .................................................................................................................................. 44
Figure 28 – Turn ON Power Switch ............................................................................................................................... 44
Figure 29 – Dust Plugs .................................................................................................................................................. 45
Figure 30 – Remove Nut ............................................................................................................................................... 45
Figure 31 – Ferrules Correct Orientation ...................................................................................................................... 45
Figure 32 – Replace Nut Loosely ................................................................................................................................... 46
Figure 33 – Insert Tube ................................................................................................................................................. 46
Figure 34 – Tighten Nut ................................................................................................................................................ 46
Figure 35 – Installation of USB Memory Stick............................................................................................................... 48
Figure 36 – Switching the Battery ON/OFF ................................................................................................................... 48
Figure 37 – Dust Plugs .................................................................................................................................................. 51
Figure 38 – Packing Instruction .................................................................................................................................... 52
Figure 39 – Front Panel ................................................................................................................................................. 54
Figure 40 – Home Screen .............................................................................................................................................. 56
Figure 41 – Quick Menu Screen .................................................................................................................................... 59
Figure 42 – Main Menu Screen ..................................................................................................................................... 60
Figure 43 – Analyser State Menu Screen ...................................................................................................................... 61
Figure 44 – Status Menu Screen ................................................................................................................................... 62
Figure 45 – Temperature Menu Screen ........................................................................................................................ 64
Figure 46 – Pressure & Flow Menu Screen ................................................................................................................... 65
Figure 47 – Voltage Menu Screen ................................................................................................................................. 65
Figure 48 – General Settings Menu Screen................................................................................................................... 66
Figure 49 – Measurement Settings Menu Screen......................................................................................................... 67
Figure 50 – Calibration Menu Screen ........................................................................................................................... 69
Figure 51 – Pressure Calibration Menu Screen ............................................................................................................. 71
Figure 52 – Flow Calibration Menu Screen ................................................................................................................... 72
Figure 53 – Service Menu Screen ................................................................................................................................. 73
Figure 54 – Diagnostics Menu Screen ........................................................................................................................... 74
Figure 55 – Digital Pots Menu Screen ........................................................................................................................... 75
Figure 56 – Internal Pump Menu Screen ...................................................................................................................... 77
Figure 57 – Valve Menu Screen .................................................................................................................................... 78
Figure 58 – Tests Menu Screen ..................................................................................................................................... 79
Figure 59 – Digital Input Test Menu Screen .................................................................................................................. 80
Figure 60 – Digital Output Test Menu Screen ............................................................................................................... 80
Figure 61 – Calculation Factors Menu Screen............................................................................................................... 81
Figure 62 – Communications Menu Screen .................................................................................................................. 82
Figure 63 – Data Logging Menu Screen ........................................................................................................................ 83
Figure 64 – Serial Communication Menu Screen .......................................................................................................... 84
Figure 65 – Analog Input Menu Screen ........................................................................................................................ 85
Figure 66 – Analog Output Menu Screen ..................................................................................................................... 86
Figure 67 – Digital Input Menu Screen ......................................................................................................................... 87

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Figure 68 – Digital Output Menu Screen ...................................................................................................................... 89
Figure 69 – Network Menu Screen............................................................................................................................... 90
Figure 70 – Bluetooth Menu Screen ............................................................................................................................ 92
Figure 71 – Trend Display Menu Screen ....................................................................................................................... 92
Figure 72 – Chart Screen .............................................................................................................................................. 93
Figure 73 – Advanced Menu Screen ............................................................................................................................. 95
Figure 74 – Hardware Menu Screen ............................................................................................................................. 96
Figure 75 – Parameter Display Menu Screen ............................................................................................................... 97
Figure 76 – Communication Ports ................................................................................................................................ 99
Figure 77 – Multidrop RS232 Cable Example ............................................................................................................. 100
Figure 78 – Example of Typical Network Setups ........................................................................................................ 101
Figure 80 – Example of Network Menu Setup ........................................................................................................... 102
Figure 81 – Port Forwarding Example ........................................................................................................................ 103
Figure 82 – LAN Network Set-Up (Airodis) ................................................................................................................. 103
Figure 83 – WAN Network Set-Up (Airodis) ............................................................................................................... 104
Figure 84 – Rear Panel PCA (Default Jumpers Highlighted) ....................................................................................... 106
Figure 85 – Analog & Digital I/O Individual Pin Descriptions...................................................................................... 106
Figure 86 – Installing Driver Software (Device Manager) ........................................................................................... 108
Figure 87 – Update Driver Popup ............................................................................................................................... 108
Figure 88 – Update Driver Popup (Directory Location) .............................................................................................. 109
Figure 89 – Installing Driver Confirmation Prompt .................................................................................................... 109
Figure 90 – Successful Driver Installation................................................................................................................... 110
Figure 91 – Airodis Workspace Manager ................................................................................................................... 111
Figure 92 – Adding a New Station .............................................................................................................................. 111
Figure 93 – New Station Connection .......................................................................................................................... 112
Figure 94 – Station Configuration (Channel List) ........................................................................................................ 113
Figure 95 – Error Status Notification .......................................................................................................................... 113
Figure 96 – Downloading Data ................................................................................................................................... 114
Figure 97 – Download Data Status ............................................................................................................................. 114
Figure 98 – Data Visibility ........................................................................................................................................... 115
Figure 99 – Exporting Data ......................................................................................................................................... 115
Figure 100 – Data Download Complete ..................................................................................................................... 116
Figure 101 – Downloading the App from Google Play Store ...................................................................................... 117
Figure 102 – Bluetooth Pairing Request ..................................................................................................................... 117
Figure 103 – Showing or Hiding the NumPad ............................................................................................................ 118
Figure 104 – Switching Analysers ............................................................................................................................... 119
Figure 105 – Real-Time Plot ....................................................................................................................................... 120
Figure 106 – Plot of Downloaded Data ...................................................................................................................... 121
Figure 107 – Directory Settings .................................................................................................................................. 122
Figure 108 – Logs Format ........................................................................................................................................... 122
Figure 109 – Colour Theme Settings .......................................................................................................................... 123
Figure 110 – Example of a Calibration System ........................................................................................................... 125
Figure 111 – Full Pressure Calibration Set-up ............................................................................................................ 128
Figure 112 – Full Pressure Calibration Set-up (Ambient) ........................................................................................... 128
Figure 113 – Ambient Pressure Calibration Set-up .................................................................................................... 129
Figure 114 – Pressure Calibration (Internal Pump Option Only) Set-up..................................................................... 130
Figure 115 – DFU ........................................................................................................................................................ 131
Figure 116 – Zero Calibration Set-up - 1..................................................................................................................... 132
Figure 117 – Zero Calibration Set-up - 2..................................................................................................................... 133
Figure 118 – Span Calibration Set-up - 1 .................................................................................................................... 134
Figure 119 – Span Calibration Set-up - 2 .................................................................................................................... 135
Figure 120 – Excel Graph of Multipoint Calibration ................................................................................................... 138

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Figure 121 – Single High Pressure Calibration Option ................................................................................................ 140

Figure 122 – Dual High Pressure Calibration Option .................................................................................................. 141
Figure 123 – Minifit Extraction Tool - (PN: T030001) ................................................................................................. 145
Figure 124 – Orifice/Sintered Filter Removal Tool - (PN: H010046) ........................................................................... 146
Figure 125 – Leak Test Jig - (PN: H050069) ................................................................................................................. 146
Figure 126 – Air Monitoring Test Equipment Kit (AMTEK) - Customisable ................................................................. 146
Figure 127 – Remove Tubing ...................................................................................................................................... 148
Figure 128 – Remove Retaining Ring .......................................................................................................................... 148
Figure 129 – Remove Filter Sealing Cap ..................................................................................................................... 149
Figure 130 – Particulate Filter..................................................................................................................................... 149
Figure 131 – Avoid to Touching Particulate Filter Paper ............................................................................................ 150
Figure 132 – Elbow Fitting Direction........................................................................................................................... 150
Figure 133 – Reconnect the Compression Nut and Tubing ........................................................................................ 150
Figure 134 – Remove Filter Casing and Filter ............................................................................................................. 151
Figure 135 – DFU ........................................................................................................................................................ 152
Figure 136 – Leak Test Jig on Exhaust Port ................................................................................................................. 152
Figure 137 – Connect Vacuum Source ........................................................................................................................ 153
Figure 138 – Blocker BGnd Air Port ............................................................................................................................ 153
Figure 139 – Bypass DFU ............................................................................................................................................ 155
Figure 140 – Remove Desiccant Access Cap ............................................................................................................... 156
Figure 141 – Remove the Tubing ................................................................................................................................ 157
Figure 142 – Pull-out the DFU..................................................................................................................................... 158
Figure 143 – Zero Scrubber Removal .......................................................................................................................... 158
Figure 144 – Reaction Cell Tee Fitting ........................................................................................................................ 159
Figure 145 – Orifice Location ...................................................................................................................................... 160
Figure 146 – Collets of the UV Lamp .......................................................................................................................... 161
Figure 147 – Connect Oscilloscope ............................................................................................................................. 162
Figure 148 – Collets of the UV Lamp .......................................................................................................................... 162
Figure 149 – Test Point Location ................................................................................................................................ 164
Figure 150 – Typical Test Point Reading of Cell Pressure Sensor ................................................................................ 164
Figure 151 – Flow Fault Diagnostic Procedure ........................................................................................................... 170
Figure 152 – Noisy or Unstable Zero or Span Results ................................................................................................. 171
Figure 153 – Troubleshooting, Electronic Zero Adjust ................................................................................................ 172
Figure 154 – Troubleshooting, Reaction Cell Temperature Failure ............................................................................ 173
Figure 155 – USB Memory Stick Failure ...................................................................................................................... 174
Figure 156 – USB Memory Stick File Structure ........................................................................................................... 176
Figure 157 – Dual Filter Option Installed .................................................................................................................... 177
Figure 158 – Test Lamp ............................................................................................................................................... 178
Figure 159 – Separate Rack Slides .............................................................................................................................. 180
Figure 160 – Assemble Inner Slide on Chassis ............................................................................................................ 180
Figure 161 – Rack Mount Ears Fitted to Instrument ................................................................................................... 181
Figure 162 – Attach Rack Mount Adaptors to Outer Slides ........................................................................................ 181
Figure 163 – Test Fit the Rack Slide Assembly into your Rack .................................................................................... 182
Figure 164 – Attach Slides to Front of Rack ................................................................................................................ 182
Figure 165 – Slide Clips ............................................................................................................................................... 183
Figure 166 – Internal Pump Option ............................................................................................................................ 184
Figure 167 – IZS Specific Internal Components Diagram ............................................................................................ 187
Figure 168 – Typical Permeation Tube and Chamber Dimensions (Units in mm)....................................................... 188
Figure 169 – Permeation Tube Removal..................................................................................................................... 190

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List of Tables
Table 1 – Internationally Recognised Symbols ............................................................................................................. 14
Table 2 – Manual Revision History ............................................................................................................................... 19
Table 3 – List of Items Received ................................................................................................................................... 39
Table 4 – Measurement Times ..................................................................................................................................... 53
Table 5 – Digital Output States .................................................................................................................................... 89
Table 6 – Setting up a New Station via Airodis ........................................................................................................... 112
Table 7 – Maintenance Schedule ............................................................................................................................... 147
Table 8 – Zero Air Scrubber Replacement Frequency ................................................................................................ 158
Table 9 – Common Errors and Troubleshooting ........................................................................................................ 167
Table 10 – Dual Sample Filter Parts Added ................................................................................................................ 177
Table 11 – Test Lamp Parts Added ............................................................................................................................. 178
Table 12 – Test Lamp Parts Removed ........................................................................................................................ 178
Table 13 – Network Port Parts Added ........................................................................................................................ 178
Table 14 – Network Port Parts Removed ................................................................................................................... 179
Table 15 – Rack Mount Kit Parts Added ..................................................................................................................... 179
Table 16 – Internal Pump Parts Added....................................................................................................................... 184
Table 17 – Internal Pump Parts Removed .................................................................................................................. 185
Table 18 – IZS Parts Added ......................................................................................................................................... 187
Table 19 – IZS Parts Removed .................................................................................................................................... 187
Table 20 – IZS Annual Maintenance Kit - (PN: E020212) ............................................................................................ 192
Table 21 – High Pressure Zero/Span Valves Parts Added........................................................................................... 195
Table 22 – Trace Parts Added..................................................................................................................................... 195
Table 23 – Trace Parts Removed ................................................................................................................................ 195
Table 24 – Trace Parameter Value Changes ............................................................................................................... 197
Table 25 – Maintenance Schedule ............................................................................................................................. 198
Table 26 – Serinus Accessories Kit (PN: H010136) ..................................................................................................... 199
Table 27 – Serinus 50 Maintenance Kit - (PN: E020204) ............................................................................................ 199
Table 28 – Serinus 50 Consumables ........................................................................................................................... 200
Table 29 – Spare Parts List (Main Components) ........................................................................................................ 201
Table 30 – Spare Parts List (Cables)............................................................................................................................ 202
Table 31 – Spare Parts List (O-rings) .......................................................................................................................... 202
Table 32 – Spare Parts List (Fittings) .......................................................................................................................... 203
Table 33 – Spare Parts List (Miscellaneous) ............................................................................................................... 204
Table 34 – Spare Parts List (Shipping) ........................................................................................................................ 205
Table 35 – Spare Part List (Test Lamp) ....................................................................................................................... 206
Table 36 – Spare Part List (Internal Pump) ................................................................................................................. 206
Table 37 – Spare Part List (Metric Fittings Kit) ........................................................................................................... 206
Table 38 – Spare Part List (IZS) ................................................................................................................................... 207
Table 39 – Spare Part List (High Pressure Zero/Span Valves) ..................................................................................... 207
Table 40 – Spare Part List (Trace Level Instrument) ................................................................................................... 207
Table 41 – Packet Format ........................................................................................................................................... 225
Table 42 – Example: Primary Gas Request ................................................................................................................. 225
Table 43 – Example: Primary Gas Response ............................................................................................................... 226
Table 44 – Example: Primary Gas Response (Continued) ........................................................................................... 226
Table 45 – List of Errors.............................................................................................................................................. 226
Table 46 – Example: Get IEEE Response data ............................................................................................................ 227
Table 47 – Advanced Protocol Parameter List ........................................................................................................... 228
Table 48 – Bayern-Hessen Data ................................................................................................................................. 241
Table 49 – Block Check Operation.............................................................................................................................. 242
Table 50 – Status Bit Map .......................................................................................................................................... 243

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Table 51 – Failure Bit Map (Positive Logic) ................................................................................................................. 243

Table 52 – Modbus Error Codes ................................................................................................................................. 247

List of Appendices
Appendix A. Advanced Protocol .................................................................................................. 225
A.1 Command Format ...................................................................................................................................... 225
A.2 Commands ................................................................................................................................................. 226
A.3 List of Parameters ...................................................................................................................................... 228
Appendix B. EC9800 Protocol ...................................................................................................... 239
B.1 Command Format ...................................................................................................................................... 239
B.2 Commands ................................................................................................................................................. 239
Appendix C. Bayern-Hessen Protocol.......................................................................................... 241
C.1 Command Format ...................................................................................................................................... 241
C.2 Commands ................................................................................................................................................. 242
Appendix D. ModBus Protocol .................................................................................................... 245
D.1 Command Format ...................................................................................................................................... 245
D.2 Commands ................................................................................................................................................. 246

Page 12
Manufacturer’s Statement
Thank you for selecting the Acoem Australasia Serinus® 50 Sulfur Dioxide Analyser.

The Serinus series is the next generation of Acoem Australasia designed and manufactured gas
analysers. The Serinus 50 will perform sulfur dioxide (SO2) measurements over a range of 0 - 20 ppm
with a lower detectable limit of 0.3 ppb.

This User Manual provides a complete product description including operating instructions, calibration
and maintenance requirements for the Serinus® 50 Sulfur Dioxide Analyser.

Reference should also be made to the relevant local standards which should be used in conjunction
with this manual. Some of these standards are listed in this manual.

If, after reading this manual you have any questions or you are still unsure or unclear on any part of
the Serinus® 50, please do not hesitate to contact Acoem Australasia or your local Acoem Australasia
distributor.

Please help the environment and recycle the pages of this manual when you have
finished using it.

Notice
The information contained in this manual is subject to change without notice. Acoem Australasia
reserves the right to make changes to equipment construction, design, specifications and/or
procedures without notification.

Ecotech Pty. Ltd. Has changed its trading name to Acoem Australasia.

Copyright © 2022. All rights reserved. Reproduction of this manual, in any form, is prohibited without
the written consent of Acoem Australasia.

Foreword Page 13
 Ser in u s ® 50 U ser M an u al 3 .3

Safety Information
Read all the safety information in this section prior to using the equipment. To reduce the risk of
personal injury caused by potential hazards, follow all safety notices and warnings in this
documentation.

The following internationally recognised symbols are used on Acoem Australasia equipment:

Table 1 – Internationally Recognised Symbols

Protective conductor terminal IEC 60417-5019

Alternating current IEC 60417-5032

Caution, hot surface IEC 60417-5041

Caution, risk of danger to user ISO 7000-0434

and/or equipment
Refer to any accompanying
documents
Caution, risk of electric shock ISO 3864-5036

These symbols will also be found throughout this manual to indicate relevant safety messages.

Note: Notes are used throughout this manual to indicate additional information regarding a
particular part or process.

If the equipment is used for purposes not specified by Acoem Australasia, the protection provided by
this equipment may be impaired.

Page 14
Important Safety Messages

Disconnect Power Prior to Service

Hazardous voltages exist within the instrument. Do not remove or modify any of the
internal components or electrical connections whilst the mains power is ON.
Always unplug the equipment prior to removing or replacing any components.
Replacing Parts
Replacement of any part should only be carried out by qualified personnel, using only
parts specified by Acoem Australasia, as these parts meet stringent Acoem Australasia
quality.
Mains Supply Cord
Do not replace the detachable mains supply cord with an inadequately rated cord. Any
mains supply cord that is used with the instrument must comply with the safety
requirements (250 V/10 A minimum requirement). A mains power cord with a
protective earth conductor must be used.
Ensure that the mains supply cord is maintained in a safe working condition.
Do Not Expose Equipment to Flammable Gases
This equipment is not intended for use in explosive environments, or conditions
where flammable gases are present. The user should not expose the equipment to
these conditions. Do not introduce any flammable gases into the instrument,
otherwise serious accidents such as explosion or fire may result.
Electromagnetic Compliance
The instrument lid should be closed when in normal operation, to comply with EMC
regulations.
Means of Lifting/Carrying Instrument
This instrument is a heavy and bulky object. Two persons should lift/carry the object,
otherwise use proper lifting equipment. Proper lifting techniques should be used
when moving the instrument.
Internal Components
Do not insert a rod or finger into the cooling fans, otherwise injury may result.
Do not energise the instrument until all conductive cleaning liquids, used on internal
components, are dried up.

Foreword Page 15
 Ser in u s ® 50 U ser M an u al 3 .3

Warranty
This product has been manufactured in an ISO 9001 facility with care and attention to quality.

The product is subject to a 24-month warranty on parts and labour from the date of shipment. The
warranty period commences when the product is shipped from the factory. Lamps, filters and other
consumable items are not covered by this warranty.

Each instrument is subjected to a vigorous testing procedure prior to despatch and will be
accompanied with a parameter list and a multipoint precision check, thereby enabling the instrument
to be installed and ready for use without any further testing.

Page 16
Service & Repairs
Our qualified and experienced technicians are available to provide fast and friendly service between
the hours of 8:30 am - 5:00 pm AEST Monday to Friday. Please contact either your local distributor or
Acoem Australasia regarding any questions you have about your instrument.

Service Guidelines
This manual is designed to provide the necessary information for the setup, operation, testing,
maintenance and troubleshooting of your instrument.

Should you still require support after consulting the documentation, we encourage you to contact your
local distributor for support.

To contact Acoem Australasia directly, please e-mail our Technical Support Specialist group at
support@ecotech.com or to speak with someone directly:

Please dial 1300 364 946 if calling from within Australia.

Please dial +61 3 9730 7800 if calling from outside of Australia.

Please contact Acoem Australasia and obtain a Return Material Authorisation (RMA) number before
sending any equipment back to the factory. This allows us to track and schedule service work and to
expedite customer service. Please include this RMA number when you return the equipment,
preferably both inside and outside the shipping packaging. This will ensure you receive prompt service.

When shipping instrumentation, please also include the following information:

 Name and phone number

 Company name
 Shipping address
 Quantity of items being returned
 Model number/s or a description of each item
 Serial number/s of each item (if applicable)
 A description of the problem and any fault-finding completed
 Original sales order or invoice number related to the equipment

Shipping Address:

Attention Service Department

Acoem Australasia

1492 Ferntree Gully Road,

Knoxfield, VIC Australia 3180

Foreword Page 17
 Ser in u s ® 50 U ser M an u al 3 .3

Product Compliance and Approvals

The Serinus® 50 Sulfur Dioxide Analyser, as manufactured by Acoem Australasia, complies with the
essential requirements of the directives listed below (including CE compliance). The respective
standards have been applied:

Low Voltage Directive (LVD) Directive 2014/35/EU

EN 61010-1:2010 Safety requirements for electrical equipment, for

measurement, control and laboratory use - General
requirements

Electromagnetic Compatibility (EMC) Directive 2014/30/EU

EN 61326-1:2013 Electrical equipment for measurement, control and

laboratory use - EMC requirements - General requirements

Radio Equipment Directive (RED) 2014/53/EU

EN 300 328 V2.1.1 Wideband transmission systems - Data transmission

equipment operating in the 2.4 GHz ISM band and using wide
band modulation techniques

Regulatory Compliance Mark (RCM) - Australia

AS/NZS 4268:2017 Radio equipment and systems - Short range devices - Limits
and methods of measurement

ARPANSA Maximum Exposure Levels to Radiofrequency Fields - 3 kHz to

Radiation Protection Standard 300 GHz - Radiation Protection Series Publication No. 3: 2002

This analyser is also certified to a number of measurement standards - refer to Section 1.2.8.

Page 18
Manual Revision History
Manual PN: M010029
Current revision: 3.3
Date released: 9 March 2022
Description: User Manual for the Serinus® 50 Sulfur Dioxide Analyser

This manual is the full user manual for the Serinus® 50 Sulfur Dioxide Analyser. This manual contains
all relevant information on theory, specifications, installation, operation, maintenance and calibration.
Any information that cannot be found within this manual can be obtained by contacting Acoem
Australasia.

This manual uses cross reference links extensively throughout this manual. The hot keys below will
greatly reduce the amount of time scrolling between references:

 You can access the links by pressing the following:

> CTRL + LEFT MOUSE CLICK: Move to the link location

 You can switch between links by pressing the following:

> ALT + LEFT ARROW KEY: Returns you to the previous Link
> ALT + RIGHT ARROW KEY: Swaps back

Table 2 – Manual Revision History

Edition Date Summary

1.0 October 2008 Initial release
1.1 February 2009 Communication update
1.2 February 2009 New maintenance procedures and small
corrections
1.3 November 2009 Updated flow from 0.5 - 0.7
New internal pump added
Serinus downloader added
Advanced communication protocol added
1.4 September 2010 CE conformity added
Parts list updated
Pressurised zero/span valve added
Updates to rack mount option
Updates to Serinus downloader
Update to 25 pin I/O
Update to network communications
2.0 July 2012 New chassis
Updated menu system

Foreword Page 19
 Ser in u s ® 50 U ser M an u al 3 .3

Edition Date Summary

Added Bluetooth menu
Serinus remote Android app
Rack mount procedure updated
Analog Output Calibration
2.1 March 2013 Formatting updates
2.2 October 2013 Formatting updates
2.2 November 2013 Addition of Airodis installation steps
3.0 April 2014 Auto-Ranging Power Supply Added
Main Controller and Rear Panel PCAs changed.
3.1 April 2016 IZS and Trace options added
3.2 June 2018 Safety Information updated
Product Compliance & Approvals updated
3.3 March 2022 Manual update to firmware 4.12.0 Rev. Q
board.
A number of changes to descriptions,
procedures and menu items.
Standardization of naming convection applied.

Page 20
1. Introduction
1.1 Description

The Serinus 50 Sulfur Dioxide Analyser (SO2) uses UV fluorescent radiation technology to detect sulfur
dioxide in the range of 0 - 20 ppm.

The U.S. EPA has designated the Serinus 50 Sulfur Dioxide Analyser as an equivalent method and TÜV
has designated it as an EN approved instrument.

This section will describe the specifications of the instrument as well as the main components and
techniques used to obtain stable gas concentration readings.

1.2 Specifications

1.2.1 Measurement

Range
0 - 20 ppm (autoranging)

U.S. EPA designated range: 0 - 0.5 ppm

TÜV EN certification range: 0 - 400 ppb

Lower Detectable Limit

< 0.3 ppb 0.2% of concentration whichever is greater, with Kalman filter active

1.2.2 Precision/Accuracy

Precision
0.5 ppb or 0.5% of reading, whichever is greater

Linearity
± 1% of full scale (from best straight-line fit)

Noise at Zero
< 0.15 ppb

Response Time
60 seconds to 95%

Sample Flow Rate

0.750 slpm

Introduction Page 21
 Ser in u s ® 50 U ser M an u al 3 .3

1.2.3 Calibration

Zero Drift
Temperature dependant: 1.0 ppb per °C

24 hours: < 0.5 ppb

30 days: < 0.5 ppb

Span Drift
Temperature dependant: 0.1% per °C

24 hours: < 0.5% of reading or < 0.5 ppb whichever is greater

30 days: < 0.5% of reading

1.2.4 Power Requirements

Operating Voltage
100 - 240 VAC (± 10%)

50 - 60 Hz (autoranging)

Overvoltage Category II

Power Consumption
250 VA max (typical at start up)

180 VA after warm up

1.2.5 Operating Conditions

Ambient Temperature: 0 - 40 °C (32 - 104 °F)

Relative Humidity: 10 - 80% (non-condensing)

Pollution Degree: 2

Sample Pressure Dependence: 5% change in pressure produces less than a 1% change in reading

Maximum altitude1: 2000 m above sea level

1
For higher altitude contact Acoem Australasia for support/assistance.

Page 22
1.2.6 Communications

Analog Output
Three menu selectable current or voltage analog outputs:

 Current output of 0 - 20 mA, 2 - 20 mA or 4 - 20 mA.

 Voltage output of 0 - 5 V, with menu selectable zero offset of 0 V, 0.25 V or 0.5 V.
 Voltage output of 0 - 10 V (configured using jumpers (JP3) on rear panel PCA).
 Range: User scalable min and max range for analog output to suit application.

Analog Input
 Three analog voltage inputs (0 - 5 VDC) CAT I rated.

Digital Output
 RS232 port #1: Normal digital communication.
 RS232 port #2: Multidrop port used for multiple instrument connections on a single RS232.
 USB port connection on the rear panel.
 USB memory stick (front panel) for data logging, event logging, parameter and configuration
storage.
 TCP/IP (optional)
 25 pin connector with discrete status and user control.
o Eight Digital Outputs, open collector max 400 mA each @ 12 VDC (max total output 2 A).
o Eight Digital Inputs, 0 - 5 VDC, CAT I rated.

1.2.7 Physical Dimensions

Case Dimensions
Rack Length (front to rear): 622 mm (24.5”)

Total Length (with latch release): 662 mm (26.1”)

Chassis Width: 418 mm (16.5”)

Front Panel Width: 429 mm (16.9”)

Chassis Height: 163 mm/Uses 4 RU (6.4”)

Front Panel Height: 185 mm (7.3”)

Weight: 21.4 kg

1.2.8 Certifications
 US EPA approval (RFNA-0809-186)
 EN approval TÜV (0000040205-02)

Introduction Page 23
 Ser in u s ® 50 U ser M an u al 3 .3

 EN approval MCERTS (MC100167/07)

 Australian Standard (AS 3580.5.1-2011)
 Russian approval (56263-14)
 French approval LSCQA
 Ukraine approval (12/3/B/24/295-17)
 Chinese Pattern Approval (JJF1361-2012)
 Korean approval NIER (AACMS-2017-04)

1.3 Nomenclature

SO2 This is the abbreviation for sulfur dioxide.

Span A gas sample of known composition and concentration used to
calibrate/check the upper range of the instrument (sulfur dioxide).
Zero Zero calibration uses zero air (SO2 scrubbed ambient air) to
calibrate/check the lower range of the instrument.
Background This is the reading of the sample without sulfur dioxide present in
the measurement cell.
Multipoint Precision Check A procedure to verify the linearity of the response of the instrument.
Calibration The process of adjusting the instrument to ensure that it is
measuring the correct concentration.
Zero Drift The change in instrument response to zero air over a period of
continuous unadjusted operation.
Zero Air Is purified air in which the concentration of SO2 is < 0.5 ppb with
water vapour of less than 10% RH. Sufficient purified air can be
obtained by passing dry ambient air through an activated charcoal
filter and a particulate filter.
External Span Source Span gas that is delivered via an external accredited cylinder (e.g.
NATA/NIST).
Sample Air Sample air is defined as the sample before it has entered the
reaction cell, as distinguished from the exhaust air.
Exhaust Air Exhaust air is the sample air after it has passed through the
reaction/measurement/detection cell and is moving towards being
expelled from the instrument.
ID and OD These are measurements of tubing. ID is the internal diameter of
tubing, OD is the outer diameter.
Multidrop A configuration of multiple instruments connected via the same
RS232 cable.
Photomultiplier Tube A highly sensitive device which can detect extremely low levels of
light (photons) and multiply the electrical signal to a point where it
can be accurately measured. This is often referred to as a PMT.
Bootloader A program that checks whether the current firmware is valid,
executes the instrument warm-up. The bootloader can be entered by
pressing the ‘+’ key on the front keypad during the first 1/2 second

Page 24
 after power ON and following the prompts. The bootloader enables
various low level recovery tools, including updating the firmware
from a USB stick.
PCA Printed Circuit Assembly. An electronic circuit mounted on a printed
circuit board to perform a specific electronic function.
Slpm Standard litres per minute. This is the flow referenced to standard
temperature and pressure conditions. For the purposes of this
manual, all flows are referenced to 0 °C and 101.3 kpa (1 atm).

1.4 Background/Theory

Sulfur dioxide (SO2) is the product of the combustion of sulfur compounds and causes significant
environmental pollution. The main sources of SO2 in the environment are from various industrial
processes such as the burning of coal in power stations, the extraction of metals from ore and
combustion of fuel within automobiles.

Sulfur dioxide is a noxious gas that can cause respiratory damage as well as impairing visibility when in
high concentrations. Sulfur dioxide also has the potential to form acid rain (H2SO4) which causes health,
environmental and infrastructural damage.

1.4.1 Measurement Theory

The measurement of sulfur dioxide (SO2) is based on classical fluorescence spectroscopy principles.
SO2 exhibits a strong ultraviolet (UV) absorption spectrum between 200 - 240 nm. When SO2 absorbs
UV at this wavelength, photon emission occurs (300 - 420 nm). The amount of fluorescence emitted is
directly proportional to the SO2 concentration.

Figure 1 – Simple Pneumatic Diagram

The Serinus 50 follows these principles and measurement techniques:

 Sample air is passed through a hydrocarbon kicker which removes hydrocarbons (a common
interferent).
 UV energy from a zinc discharge lamp is passed through a UV bandpass filter to produce radiation
at 214 nm.

Introduction Page 25
 Ser in u s ® 50 U ser M an u al 3 .3

 The radiation is focused into the fluorescence cell where it is absorbed by the SO2 molecules.
 The SO2 molecules emit photons (fluoresce) uniformly in all directions.
 Wavelengths between 310 - 350 nm, which are specific to SO2, pass through a bandpass filter
where they reach the photomultiplier tube which measures the signal intensity.
 A reference detector monitors the emission from the zinc lamp and is used to correct for
fluctuations in lamp intensity.

Figure 2 – Optical Measurement Theory

1.4.2 Kalman Filter Theory

The digital Kalman filter provides an ideal compromise between response time and noise reduction for
the type of signal and noise present in ambient air analyser.

The Kalman filter enhances measurements by modifying the filter time base variable, depending on
the change rate of the measured value. If the signal is changing rapidly, the instrument is allowed to
respond quickly. When the signal is steady, a long integration time is used to reduce noise. The system
continuously analyses the signal and uses the appropriate filtering time.

Page 26
1.5 Instrument Description

The major components of the Serinus 50 are described below:

Figure 3 – Major Components of Serinus 50

1.5.1 Calibration Valve Manifold

Refer to Figure 3 for the location of calibration valve manifold. The calibration valve manifold switches
between sample, calibration and background gas.

Figure 4 – Calibration Valve Manifold

Introduction Page 27
 Ser in u s ® 50 U ser M an u al 3 .3

1.5.2 Sample Filter Holder

Refer to Figure 3 for the location of sample filter holder. Within the sample filter holder there is a
particulate filter. The particulate filter is a Teflon 5-micron (µm) filter with a diameter of 47 mm. This
filter prevents all particles larger than 5 µm from entering the measurement system that could
interfere with sample measurement.

Note: The 5-micron filter element should be replaced on a regular basis.

Figure 5 – Sample Filter Holder

1.5.3 Dual Hydrocarbon Kicker

Refer to Figure 3 for the location of dual hydrocarbon kicker. The dual hydrocarbon kicker removes
interfering hydrocarbons from the sample air. This is achieved by using counter current exchange,
where an air with a lower concentration of hydrocarbons moves in an opposite direction to air with a
higher concentration. The high concentrations of hydrocarbons diffuse through a selective permeation
membrane to the low concentration exhaust air and are removed. Increasing the flow of the low
concentration air also increase the rate of diffusion.

Figure 6 – Dual Hydrocarbon Kicker

Page 28
1.5.4 Zero Air Scrubber
Refer to Figure 3 for the location of zero air scrubber. The zero air scrubber is an activated charcoal
scrubber which draws in ambient air to create SO2 free air used for background corrections, internal
zero and bypass air for the dual hydrocarbon kicker, aiding in the removal of hydrocarbons from the
sample stream prior to entering the measurement cell.

Figure 7 – Zero Air Scrubber

1.5.5 DFU
The Disposable Filter Unit (DFU) is a fine filter used to remove particulates down to 0.1 micron from
the sample measurement.

Figure 8 – DFU

1.5.6 Main Controller PCA

Refer to Figure 3 for the location of main controller PCA. The main controller PCA controls all the
processes within the instrument. As well as the on-board microprocessor, it contains a battery backed
clock, calendar, analog to digital converters and many other circuits for signal processing and control.
The ambient pressure and chassis temperature sensors are also located on this board. The main
controller PCA is located above all other components within the instrument. It pivots on hinges to
allow access to the components underneath.

CAUTION
Never place objects on top of the main controller PCA as it may result in damage.

Introduction Page 29
 Ser in u s ® 50 U ser M an u al 3 .3

1.5.7 Measurement Cell

Figure 9 – Measurement Cell

1.5.7.1 PMT Assembly

Figure 10 – PMT Assembly - 1

Figure 11 – PMT Assembly - 2

Page 30
Photomultiplier Tube (PMT)
Refer to Figure 10 for the location of PMT. The PMT measures the amount of light reaching it. Filtered
light from the reaction cell reaches the PMT, which allows for direct measurement of SO2.

High Voltage Power Supply and Preamplifier

Refer to Figure 10 for the location of high voltage power supply and preamplifier. This is a single
component within the PMT housing. Its function is to supply high voltage to the PMT and to amplify
the photocurrent signal from the PMT.

Magnetic Shield
Refer to Figure 10 for the location of magnetic shield. The magnetic shield is used to protect PMT from
electromagnetic radiation. Which will reduce the amount of noise generated in the PMT.

PMT Cooler and Thermistor

Refer to Figure 11 for the location of PMT cooler and thermistor. The PMT cooler and thermistor are
mounted below and in the cold block respectively. They ensure that the PMT is operated at a constant
13 °C. This reduces the measurement noise of the PMT.

Cold Block
Refer to Figure 11 for the location of cold block. The cold block is holding the PMT and maintaining the
temperature of PMT at 13 °C.

1.5.7.2 Reaction Cell Assembly

Refer to Figure 9 for the location of reaction cell assembly. The reaction cell is where the UV radiation
from the UV lamp is absorbed by the SO2 molecules present in the sample. The SO2 molecules enter
an excited state then they release this energy in the form of a fluorescence reaction, emitting photons.
A portion of this light is filtered to a specific wavelength in the region of 310 - 350 nm by the bandpass
filter which is subsequently measured by the PMT.

Figure 12 – Reaction Cell Assembly - 1

Introduction Page 31
 Ser in u s ® 50 U ser M an u al 3 .3

Figure 13 – Reaction Cell Assembly - 2

Figure 14 – Reaction Cell Assembly - 3

UV Lamp
Refer to Figure 12 for the location of UV lamp. The UV lamp is a discharge zinc lamp which emits UV
radiation over a broad range.

UV Bandpass Filter
Refer to Figure 12 for the location of UV bandpass filter. The UV bandpass filter only allows UV at 214
nm through into the reaction cell.

Optical Bandpass Filter

Refer to Figure 13 for the location of optical bandpass filter. The optical bandpass filter is a coloured
glass that only allows light of a specific wavelength through to the PMT (310 - 350 nm).

Lenses
Refer to Figure 12 and Figure 13 for the location of lenses. Two silica lenses are used in the optical
path, the first (plano-convex) to focus UV radiation inside the reaction cell and the second (bi-convex)
focuses the fluorescent light onto the PMT cathode from the SO2 reactions.

Page 32
UV Reference Detector & Preamplifier
Refer to Figure 12 for the location of UV reference detector & preamplifier. The UV reference detector
monitors the intensity of UV radiation entering the reaction cell. This measurement is used to
compensate for variations in UV lamp output. The preamplifier circuit board converts the current signal
from reference detector to a voltage signal and provides amplification.

Orifice
Refer to Figure 12 for the location of orifice. The critical orifice is made of a high precision stainless
steel and sapphire, which are located in the tee fitting on the top of the reaction cell. The critical orifice
is a simple device that operates at a set temperature and requires minimal maintenance, it will
passively keep the volume flow rate constant at a known value.

Figure 15 – Orifice

Pressure Sensor PCA

Refer to Figure 12 for the location of pressure sensor PCA. The pressure sensor PCA has an absolute-
pressure transducer that is mounted on the reaction cell and sealed via a gasket. This allows the
pressure sensor PCA to measure the sample air pressure in the reaction cell. This pressure reading is
used to verify sample flow and correct measurement readings for pressure variations.

Heater and Thermistor

Refer to Figure 14 for the location of heater and thermistor. Heater and thermistor are mounted in the
reaction cell. They are used in this instrument to keep the cell temperature at a stable and constant
50 °C.

1.5.7.3 PMT Fan Assembly

Refer to Figure 9 for the location of PMT fan assembly. The PMT fan assembly is mounted near the
heatsink to remove the heat generated by PMT cooler and maintain the measurement cell
temperature.

Introduction Page 33
 Ser in u s ® 50 U ser M an u al 3 .3

1.5.8 Lamp Driver PCA

Refer to Figure 3 for the location of lamp driver PCA. The lamp driver PCA generates a high-frequency
voltage (800 - 1100 V) to start and maintain the UV lamp at a constant intensity. The lamp current is
set by the Instrument and is maintained at 35 mA.

CAUTION
The lamp driver PCA contains high voltages. Ensure the instrument is turned OFF
before accessing this component.

Note: The lamp driver PCA is the same type as used on the Serinus 10 O3 Analyser. For the
Serinus 50, with a REV D lamp diver PCA, set all the jumpers marked in red (JP1 - JP5) to the left
(refer to Figure 16). The correct setting must be used or damage to the electronics may occur.

Figure 16 – Lamp Driver PCA Type Jumper Setting (REV D)

1.5.9 Pneumatic Tubing

The pneumatic tubing inside this instrument is specially designed for use in Acoem Australasia Serinus
instruments. It is flexible like silicone tubing with the added inner sheath of PVDF to prevent
contamination of the sample. Care should be taken when removing and inserting the tubing into the
fittings.

Figure 17 – Ecotech Tubing

Page 34
1.5.10 Rear Panel

Figure 18 – Rear Panel

1.5.10.1 Rear Panel PCA

Refer to Figure 18 for the location of rear panel PCA. The rear panel PCA contains all the connections
for external communications, including analog input, analog output, digital inputs, digital outputs,
RS232, USB, and TCP/IP network connection (optional). Refer to Section 4.4.4 for details of all the
jumper’s function.

1.5.10.2 Chassis Fan

Refer to Figure 18 for the location of chassis fan. The chassis fan is assembled to the back side of the
instrument to maintain the Serinus 50 temperature. Fan filter is also installed with the fan to prevent
the instrument from dust.

Note: Clean the chassis fan filter on regular interval (refer to Section 6.4.2).

1.5.10.3 Power Supply

Refer to Figure 18 for the location of power supply. The power supply is a self-contained unit housed
in a steel case designed to meet all the relevant safety and EMC requirements. This new revision of
power supply is different to the previous revision as there is no need to set the operating voltage
switch because it is autoranging.

The output of the power supply provides +12 V, +5 V, -12 V and +3.3 V to the instrument.

ON/OFF Switch
The ON/OFF switch is located on the rear panel (bottom right facing the rear of the instrument), refer
to Figure 19. It is part of the power supply.

Figure 19 – Power ON/OFF Switch

Introduction Page 35
 Ser in u s ® 50 U ser M an u al 3 .3

1.5.10.4 Pneumatic Ports

Refer to Section 2.3.2 for pneumatic ports connection and detail.

1.5.11 Communications
Communication between the instrument and either a data logger, laptop or network can be performed
with the following communication connections located on the rear panel (refer to Figure 20). These
connections can be used for downloading data, onsite diagnostics, maintenance and firmware
upgrades.

Figure 20 – Communication Connections

RS232 #1
This port is designed to be used for simple RS232 communication.

RS232 #2
This port is designed to be used for simple RS232 communication or in multidrop configuration.

USB
This port can be used for instrument communications with equipment through a standard USB port.

TCP/IP Network (optional)

This port is best used for remote access and real-time access to instruments when a network is
available to connect with.

Analog & Digital I/O

The analog/digital port sends and receives analog/digital signals to other devices. These signals are
commonly used to activate gas calibrators or for warning alarms.

Analog Outputs
The instrument is equipped with three user definable analog outputs. The outputs are menu selectable
as voltage output 0 - 5, 0.25 - 5 or 0.5 - 5 VDC or current output 0 - 20, 2 - 20 or 4 - 20 mA. The current

Page 36
output can also be configured as a voltage output of 0 - 10 V, by configuring the jumpers (JP3) on the
rear panel PCA.

Refer to Section 4.4 for more detail.

Analog Inputs
The instrument is also equipped with three analog voltage inputs (0 - 5 VDC CAT 1) with resolution of
15 bits plus polarity.

CAUTION
Exceeding these voltages can permanently damage the instrument and void the
warranty.

Digital Status Inputs

The instrument is equipped with eight logic level inputs (0 - 5 VDC CAT 1) for the external control of
zero/span calibration sequences.

CAUTION
Exceeding these voltages can permanently damage the instrument and void the
warranty.

Digital Status Outputs

The instrument is equipped with eight open collector outputs, which will convey instrument status
conditions and warning alarms such as no flow, sample mode, etc.

CAUTION
Exceeding 12 VDC or drawing greater than 400 mA on a single output or a total
greater than 2 A across the eight outputs can permanently damage the
instrument and void the warranty.

Bluetooth
This allows for remote access of the instrument to any Android device with the Serinus Remote
Application installed. It uses Bluetooth to control the instrument, view parameters, download data
and construct real-time graphs.

Introduction Page 37
 Ser in u s ® 50 U ser M an u al 3 .3

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Page 38
2. Installation
2.1 Initial Check

Packaging
The Serinus® 50 is transported in packaging specifically designed to minimise the effects of shock and
vibration during transportation. Acoem Australasia recommends that the packaging be kept if there
is a likelihood that the instrument is going to be relocated.

Note: The red plastic caps that seal the pneumatic connections during transport must be removed
prior to operation.

Items Received
With the delivery of the Serinus 50, the user will receive the following:

Table 3 – List of Items Received

Item Name Part No. Image

Acoem Australasia Serinus 50 analyser E020050 Refer to Figure 21, callout 7.
Green Ecotech Resources USB Stick H030137-01 Refer to Figure 21, callout 10.
Manual (hardcopy optional) M010029 -
USB Memory Stick H030021 Refer to Figure 21, callout 9.
USB Cable COM-1440 Refer to Figure 21, callout 8.
Keys for Slam Lock - Refer to Figure 21, callout 11.
Data Sheet - Refer to Figure 21, callout 12.
Power Lead (120 V)* C040007 Refer to Figure 21, callout 2.
Power Lead (240 V)* C040006 Refer to Figure 21, callout 1.
C040008 Refer to Figure 21, callout 3.
C040009 Refer to Figure 21, callout 4.
C040010 Refer to Figure 21, callout 5.
C040054 Refer to Figure 21, callout 6.

*The power lead received depends on the power supply of the country (120 V or 240 V).

Note: Check that all these items have been delivered undamaged. If any item appears damaged,
contact your supplier before turning the instrument ON.

Note: It is recommended to kept packaging material for transport or storage purpose.

Installation Page 39
 Ser in u s ® 50 U ser M an u al 3 .3

Figure 21 – Received Item

Page 40
Opening the Instrument
Check the interior of the instrument with the following steps:

1. Refer to Figure 22. Remove the thumb screws located on the rear panel.

Figure 22 – Opening the Instrument - 1

2. Refer to Figure 23. Unlocked the slam lock using keys provided with instrument.

Figure 23 – Opening the Instrument - 2

3. Refer to Figure 24. Open the chassis lid latch by pressing in the slam lock located on the front panel.

Figure 24 – Opening the Instrument - 3

Installation Page 41
 Ser in u s ® 50 U ser M an u al 3 .3

4. Refer to Figure 25. To completely remove the lid, slide the lid backwards until the rollers line up
with the gaps in the track and lift the lid upwards to remove from the instrument.

Figure 25 – Opening the Instrument - 4

5. Check that all pneumatic and electrical connectors are connected. If not, reconnect.
6. Check for any visible and obvious damage. If damage exists contact your supplier and follow the
instructions in claims for Damaged Shipments and Shipping Discrepancies at the front of this
manual.

2.2 Installation Notes

When installing the instrument the following points must be taken into account:

 The instrument should be placed in an environment with minimal dust, moisture and variation in
temperature (refer to Section 2.4 and 2.5 for specific approval set-up).
 For best results the instrument should be located in a temperature and humidity controlled
environment (air conditioned shelter). An enclosure temperature of 25 - 27 °C is optimum.
 Whether in a rack or placed on a bench, the instrument should not have anything placed on top of
it or touching the case.
 Instruments should be sited with easy access to the front panel (instrument screen/USB memory
stick) and to the rear panel (communication ports/pneumatic connections).
 It is recommended that the sample line be as short as possible and/or a heated manifold be used
for sampling (minimising moisture condensation in the sample).
 Do not pressurise the sample line under any circumstances. Sample should be drawn through the
instrument under atmospheric pressure. This should be achieved by either using the internal pump
option (if installed) or an external vacuum pump connected to the exhaust port of the instrument.
 When supplying span gas, ensure the flow is approximately 1.1 slpm and excess is sufficiently
vented.

Note: The power ON/OFF switch is accessible from the rear of the instrument only. Install the
instrument so that the ON/OFF power switch is accessible.

Page 42
2.3 Instrument Set-up

After installing the instrument the following procedures should be followed to ready the instrument
for monitoring.

Figure 26 – Instrument Rear Panel

2.3.1 Power Connections

CAUTION
Hazardous voltages exist within the instrument. Do not remove or modify any of
the internal components or electrical connections whilst the mains power is ON.

CAUTION
Always unplug the equipment prior to removing or replacing any components.

CAUTION
Do not replace the detachable mains supply cord with an inadequately rated
cord. Any mains supply cord that is used with the instrument must comply with
the safety requirements (250 V/10 A minimum requirement).

CAUTION
Ensure that the mains supply cord is maintained in a safe working condition.

CAUTION
When connecting the mains power to the instrument, the following must be
adhered to otherwise the safety and the reliability of the instrument may be
compromised.

 A three pin mains power lead with a protective earth conductor MUST be used.
 The mains power outlet (wall socket) must be in the range of 100 - 240 VAC, 50 - 60 Hz.
 The mains power outlet must be protected by an earth leakage protection circuit.

Installation Page 43
 Ser in u s ® 50 U ser M an u al 3 .3

 Refer to Figure 27. Connect the instrument’s power cord into the instrument and mains power
outlet.

Figure 27 – Connect Power Cord

 Refer to Figure 28. Turn ON the power switch.

Figure 28 – Turn ON Power Switch

2.3.2 Pneumatic Connections

The Serinus® 50 has four pneumatic ports on the rear panel of the instrument; the Sample Port, the
Calibration Port, the Exhaust Port and the Background Air Port. All tubing and fittings used should
follow the instructions below:

 Must be made of Teflon® FEP material, Kynar®, stainless steel, glass or any other suitably inert
material.
 Sample line should be no more than two meters in length with 1/8” ID and 1/4” OD.
 Sample inlet pressure should not exceed 5 kPa above ambient pressure.
 Tubing must be cut squarely and any burrs removed.

Page 44
Procedure

1. Refer to Figure 29. Remove all the dust plugs.

Figure 29 – Dust Plugs

2. Refer to Figure 30. Remove the sample port nut.

Figure 30 – Remove Nut

3. Refer to Figure 31. Inspect the ferrules inside the nut for correct orientation.

Figure 31 – Ferrules Correct Orientation

Installation Page 45
 Ser in u s ® 50 U ser M an u al 3 .3

4. Refer to Figure 32. Replace the nut loosely, only 2 or 3 threads, on the sample port.

Figure 32 – Replace Nut Loosely

5. Refer to Figure 33. Push the tubing into the end of the nut until you hit the tube stop inside the
fitting.

Figure 33 – Insert Tube

6. Refer to Figure 34. Tighten clockwise until finger tight.

Figure 34 – Tighten Nut

Page 46
7. Nuts should be re-tightened when instrument reaches operating temperature.
8. Follow the same above procedure to connect calibration, exhaust line and background air line.

Sample Port
The sample port must be connected to an ambient source of sample air. When using a sample manifold
the Serinus requires at least 1.1 slpm delivered to the sample manifold (0.73 slpm for measurement
plus approximately 50% excess).

Calibration Port
The calibration port can be connected to the span/zero sources. It is recommended that a gas
calibrator (Acoem Australasia’s Serinus Cal 1000, 2000 and 3000) be used with a cylinder of sulfur
dioxide to deliver precise concentrations of SO2.

Note: All connections to this port should not exceed ambient pressure. A vent is required for excess
span gas.

Exhaust Port
The exhaust port is where the measured sample, calibration gas, background air and kicker bypass air
are exhausted from the instrument. The exhaust port should be connected to the vacuum pump using
1/4” OD tubing. The P030004 240 V vacuum pump (P030005 110 V) available from Acoem Australasia,
can be used to provide the required vacuum and flow for one Serinus 50 analyser as well as two other
instrument such as a Serinus 10 or Serinus 30.

CAUTION
Sulfur dioxide is a toxic gas. It is recommended that exhaust air is expelled into
an unoccupied area, as it contains trace levels of sulfur dioxide. The exhaust
must be a suitable distance from the sample inlet to avoid influencing the
ambient measurements.

Background Air Port

The background air port is used to supply zero air to the instrument. The internal SO2 scrubber is usually
sufficient for this purpose. This air is used for background, internal zero calibration/check and
hydrocarbon kicker air.

2.3.3 Communications Connections

There are a number of ways to communicate with the instrument, refer to Section 4 for detail.

Installation Page 47
 Ser in u s ® 50 U ser M an u al 3 .3

2.3.4 Instrument Set-up

1. Refer to Figure 35. Open the lid and ensure the USB memory stick is installed.

Figure 35 – Installation of USB Memory Stick

2. Refer to Figure 36. Check the battery is turned ON at the main controller PCA.

Figure 36 – Switching the Battery ON/OFF

3. Turn ON the instrument and allow the warm-up procedure to complete (refer to Section 3.1).
4. Set the time and date (refer to Section 3.4.8).
5. Set the digital filter to the desired setting (refer to Section 3.4.9).
6. Set the internal data logging options (refer to Section 3.4.23).
7. Set the analog and digital input and output settings (refer to Section 3.4.25, Section 3.4.26, Section
3.4.27 and Section 3.4.28).
8. Perform a pressure sensor check (refer to Section 6.4.10).
9. Perform a leak check (refer to Section 6.4.4).
10. Leave the instrument to warm-up and stabilise for two-three hours (if the user opted for the IZS
option, refer to Section 8.7).

Page 48
11. Perform a manual background (refer to Section 5.3).
12. Perform a zero precision check (refer to Section 5.4).
13. Perform a span calibration adjustment (refer to Section 5.5).
14. Follow the procedure for a multipoint precision check (refer to Section 5.7).
15. The instrument is now ready for operation.

2.4 U.S. EPA Equivalent Set-up

The Serinus 50 is designated as equivalent method EQSA-0509-188 by the U.S. EPA (40 CFR Part 53).

The instrument must be used under the following conditions to satisfy its equivalency:

Range
0 - 0.5 ppm

Ambient Temperature
20 - 30 °C

Line Voltage
105 - 125 VAC, 60 Hz

Pump
Acoem Australasia optional internal or external pump

Filter
Factory setup to meet requirement:

Instrument Settings
If the units in the Measurement Menu are changed from volumetric to gravimetric (or gravimetric to
volumetric), the instrument must be calibrated.

The following menu selections must be used:

Measurement Settings
Background Interval: Enabled

Calibration Menu
Span Comp: Disabled

Diagnostics Menu
Press/Temp/Flow Comp: On

Installation Page 49
 Ser in u s ® 50 U ser M an u al 3 .3

Diagnostic Mode
Operate

Control Loop
Enabled

The instrument must be operated and maintained in accordance with this user manual.

The Serinus 50 analyser is designated U.S. EPA Equivalent Method with or without the following
options/items:

 Internal pump
 Rack mount assembly
 Optional Ethernet port

2.5 EN Type Approval Set-up

The Serinus 50 has been certified to TÜV Performance Standards for Continuous Ambient Air Quality
Monitoring Systems, certificate number is TÜV 936/21221977/B. The Serinus 50 must be used under
the following conditions to meet EN requirements:

Range
0 - 400 ppb

Ambient Temperature
0 - 30 °C

Instrument Settings
The instrument must be operated and maintained in accordance with this user manual.

The following menu selections must be used:

Calibration Menu
Span Comp: Disabled

Diagnostics Menu
Press/Temp/Flow Comp: On

Diagnostic Mode: Operate

Control Loop: Enabled

Page 50
2.6 Transporting/Storage

Transporting the instrument should be done with great care. It is recommended that the packaging
the Serinus was delivered in should be used when transporting or storing.

When transporting or storing the instrument the following points should be followed:

1. Turn OFF the instrument and allow it to cool down.

2. Remove all connections of pneumatic pipe, power cables and communication cables from the
instrument.
3. Refer to Figure 36. If storing over a long period (six months) turn the battery OFF by the switch on
the main controller PCA.
4. Remove the instrument from the rack.
5. Refer to Figure 37. Seal each pneumatic ports with a dust plug.

Figure 37 – Dust Plugs

6. Refer to Figure 35. Remove the USB memory stick and pack with instrument.
7. If you have the IZS option installed refer to Section 8.7.3 for specific transporting and storage
instructions.
8. Place the instrument back into a plastic bag with desiccant packs and seal the bag (ideally the bag
supplied upon delivery).
9. Refer to Figure 38. Place the instrument back into the original foam and box it was delivered in. If
this is no longer available find some equivalent packaging that provides protection from damage.
Note: Acoem Australasia recommended to use the same packing material in which instrument is
delivered.

10. The instrument is now ready for long term storage or transportation.
Note: After transport or storage the instrument must be set up and calibrated
(refer to Section 2.3.4)

Installation Page 51
 Ser in u s ® 50 U ser M an u al 3 .3

Figure 38 – Packing Instruction

Page 52
3. Operation
3.1 Warm-Up

When the instrument is first turned ON it must go through a period of adjustment and calibration. No
measurements are taken during this warm-up period.

The following activities occur during warm-up:

High Volt Check

Checks to see if the flag to run the high voltage tuning is active.

High Volt Adjust

The high voltage digital pot is adjusted to set the high voltage supply to the PMT for optimal range and
performance.

Cell Temperature
Checks to see if the cell temperature has reached 90% of the target set point.

Lamp Stabilise
Adjusts the lamp current to 35 mA and waits for the output to stabilise.

Ref Stabilise
The instrument adjusts the reference voltage to between 2.3 and 2.7 V and waits for the reference
voltage signal to stabilise.

Zero Adjust
Adjusts the measure zero pot until the concentration voltage reaches 0 V. Then it makes a small
increase to the measure zero pot to bring just above zero.

After warm-up, the instrument will immediately begin making measurements (refer to Section 3.2).

3.2 Measurement

The Serinus 50 primarily operates in one continuous sample cycle. A background is performed after
warm-up and once a day at 23:50. It is used to measure background fluorescence in the cell and is
subtracted from sample measurements.

Table 4 – Measurement Times

Instrument State Duration (minutes) Description

Bkgnd Fill 4 Reaction cell fills with background air
Bkgnd Meas 5 Measurement of background air
SO2 Sample Fill 3 Reaction cell fills with sample air

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 Ser in u s ® 50 U ser M an u al 3 .3

Instrument State Duration (minutes) Description

SO2 Sample Meas continuous Measurement of sample air

3.3 General Operation Information

3.3.1 Keypad & Display

The instrument is operated with the use of four sets of buttons:

Figure 39 – Front Panel

Selection Buttons (1)

The selection buttons will perform the function specified directly above it on the screen. Generally this
involves opening a menu, editing a value, accepting or cancelling an edit or starting an operation.

Scrolling Buttons (2)

The scrolling buttons allow the user to scroll up and down through menus or selection boxes. The
scrolling buttons are also used to scroll side to side through editable fields such as: Dates, Times,
Numbers etc.

On the home screen these buttons are used for adjusting the screen contrast. Press and hold the up
button to increase contrast; press and hold the down button to decrease.

Keypad (3)
+
The keypad contains the numbers 0 - 9, a decimal point/minus key ( ̅)
. and a space/plus key (SPACE).

In the few cases where letters can be entered, the number keys act like a telephone keypad. Every
time a number key is pressed, it cycles through its choices. The up/down arrow keys scroll through all
the numbers and the entire alphabet.

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 Button Function
1 1 or space, underline
2 2, A, B, C, a, b, c
3 3, D, E, F, d, e, f
4 4, G, H, I, g, h, i
5 5, J, K, L, j, k, l
6 6, M, N, O, m, n, o
7 7, P, Q, R, S, p, q, r, s
8 8, T, U, V, t, u, v
9 9, W, X, Y, Z, w, x, y, z
0 0 or space, underline
+
(SPACE ) and key ( ̅)
. When editing a floating point number:
The key ( ̅)
. inserts a negative sign if the editing cursor is at the start of the
number and negative signs are allowed. Otherwise it moves the decimal
place to the current cursor location.
inserts a positive sign if the cursor is at the start of the number; otherwise it
enters a space.
For non-floating point numbers:
These keys usually increment or decrement the current value by 1. When
+
editing the month field of a date, the (SPACE ) and ( ̅)
. key change the month.

Instrument Status Light Buttons (4)

Located in the top left corner, these lights indicate the status of the instrument:

 A red light indicates that the instrument has a major failure and is not functioning.
 An orange light indicates there is a minor problem with the instrument, but the instrument may
still take measurements reliably.
 A green light indicates that the instrument is working and there are no problems.

In the case of an illuminated orange or red status light, go to the Status Menu to find which
components are failing (refer to Section 3.4.4) or press the orange or red status light button to see a
pop-up box with a full list of current faults.

Press the green status light button at any time to close any open edit box or menu and come back the
to the home screen.

If none of instrument status lights are ON and the keypad is backlit, this indicates that the instrument
is running the bootloader. The screen will also indicate that it is in bootloader menu.

Operation Page 55
 Ser in u s ® 50 U ser M an u al 3 .3

3.3.2 Home Screen

The home screen is composed of seven parts: readings (1), error/status line (2), instrument activity
line (3), selection buttons (4), time/date (5), concentration units (6) and USB status (7).

Figure 40 – Home Screen

Readings (1)
Displays the concentration being measured in real-time. The display can be configured to show just
the instantaneous data or the instantaneous and average data (refer to Section 3.4.8).

Error/Status Line (2)

The error/status line provides the user with information on any problems the instrument may have. It
displays the highest priority error or status condition contained in the Status Menu (refer to Section
3.4.4).

Instrument Activity (3)

This line shows what function the instrument is currently performing. Generally, it will show three
groups of actions: Warm-up, Measurement or Calibration.

Selection Buttons (4)

These buttons are used on the home screen to enter one of two menus. The Quick Menu (refer to
Section 3.4.1) contains all information and features necessary for scheduled maintenance. The Main
Menu (refer to Section 3.4.2) contains all information and fields available to the user and is generally
only used during initial set-up and diagnostics.

Time and Date (5)

The time and date are displayed in between the menu buttons at the bottom of the screen.

Concentration Units (6)

The instrument units are displayed in the bottom right corner of the display.

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USB Detection (7)
A USB symbol will be displayed in the bottom right corner when the USB memory stick is plugged in
(the USB socket is behind the front panel). If the USB symbol is not shown the USB memory stick should
be inserted. Underneath the USB symbol arrows may be displayed which indicates data transfer. The
USB memory stick must not be removed whilst the arrows are visible.

Note: To safely remove the USB memory stick, navigate to the Quick Menu and use the Safely
Remove USB Stick function (refer to Section 3.4.1).

Operation Page 57
 Ser in u s ® 50 U ser M an u al 3 .3

3.4 Menus & Screens

Status Menu

Temperature Menu
Analyser State Menu
Pressure & Flow
Menu
General Settings
Menu
Voltage Menu
Measurement
Settings Menu
Pressure Calibration
Menu
Calibration Menu
Flow Calibration
Menu

Digital Pots Menu

Internal Pump Menu

Diagnostics Menu
Service Menu Valve Menu
Calculation Factors Digital Input Test
Menus & Screens

Menu Menu
Tests Menu
Quick Menu Digital Output Test
Data Logging Menu
Menu

Main Menu Serial

Communication
Menu

Analog Input Menu

Analog Output Menu

Communications
Menu
Digital Input Menu

Digital Output Menu

Network Menu

Bluetooth Menu

Trend Display Menu Chart

Hardware Menu
Advanced Menu
Parameter Display
Menu

Page 58
The menu system is divided into two sections selectable from the Home Screen: The Quick Menu and
the Main Menu. The Quick Menu contains all information and operations necessary during scheduled
maintenance visits. The Main Menu contains all fields that are accessible to users. It provides
information on component failures and measurement parameters as well as editable fields and test
procedures.

In general, editable parameters are displayed in bold font. Non-editable information is displayed in a
thin font. Some parameters may become editable based on the state of the instrument.

For example, the manual calibration type and mode can only be changed when the instrument has
finished the warm-up process.

3.4.1 Quick Menu

The Quick Menu contains all the maintenance tools in one easy to use screen. It allows operators to
perform calibrations, check important parameters and review the service history.

Figure 41 – Quick Menu Screen

Span Calibrate SO2 This field is used to perform a span calibration adjustment and should
only be used when a known concentration of span gas is being drawn
through the reaction cell and the reading is stable.
Activating the span calibrate field for a named gas will open a dialog
box. Enter the concentration of the span gas that the instrument is
sampling and press Accept.
Event Log This field enters a screen with a log of all the events that the
instrument has performed. These events include errors and warnings.
This log is stored on the removable USB memory stick.
The log is organised by month. When the user enters this screen, they
will be prompted to enter the month for which they wish to view
events.
Instrument This field allows the instrument to be set to either Online (normal
instrument operation) or In Maintenance (data is flagged as invalid).
Safely Remove USB Stick Always select this menu item before removing the USB memory stick
or select the same menu item from the Service Menu (refer to
Section 3.4.13). Failure to do this may cause corruption of the
memory stick.
Instrument Gain This is a multiplication factor which is used to adjust the concentration
measurement to the appropriate level (set by performing a Span

Operation Page 59
 Ser in u s ® 50 U ser M an u al 3 .3

Calibrate). This should be recorded after each calibration in the

station log book.
Next Service Due A field that notifies the user when the next instrument service is due.
This value is editable in the Next Service Due field of the Advanced
Menu (refer to Section 3.4.31). This field is only displayed in the two
weeks prior to the date displayed in this field or after the date has
occurred.

3.4.2 Main Menu

There are seven menus on the Main Menu screen.

Figure 42 – Main Menu Screen

Analyser State Menu Refer to Section 3.4.3.

General Settings Menu Refer to Section 3.4.8.
Measurement Settings Menu Refer to Section 3.4.9.
Calibration Menu Refer to Section 3.4.10.
Service Menu Refer to Section 3.4.13.
Communications Menu Refer to Section 3.4.22.
Trend Display Menu Refer to Section 3.4.31

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3.4.3 Analyser State Menu
Main Menu → Analyser State Menu

This displays the status of various parameters that affect instrument measurements.

Figure 43 – Analyser State Menu Screen

Status Menu Refer to Section 3.4.4.

Temperature Menu Refer to Section 3.4.5.
Pressure & Flow Menu Refer to Section 3.4.6.
Voltage Menu Refer to Section 3.4.7.
Model This field will display the instrument model (e.g. Serinus 50).
Nominal Range The measurement range of the instrument.
Ecotech ID The Ecotech ID number.
Serial No. The main controller PCA serial number.
Board Revision The main controller PCA version.
Firmware Ver. This field displays the firmware version currently in use on this
instrument. This can be important when performing diagnostics and
reporting back to the manufacturer.
Power Failure This field displays the time and date of the last power failure or when
power was disconnected from the instrument.

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 Ser in u s ® 50 U ser M an u al 3 .3

3.4.4 Status Menu

Main Menu → Analyser State Menu → Status Menu

The Status Menu presents a list of the current Pass/Fail status of the main components. During warm-
up, the status of some parameters will be a dashed line.

Figure 44 – Status Menu Screen

Event Log This field enters a screen with a log of all the events that the
instrument has performed. These events include errors and
warnings. This log is stored on the USB memory stick.
The log is organised by month. When the user enters this screen
they will be prompted to enter the month for which they wish to
view events.
Show Error List This field allows the user to display the list of current errors and
warnings on the screen. Pressing either of the selection buttons
will clear the screen.
Next Service Due This field is visible with the next service due date if the service is
due within the next two weeks.
Maintenance Mode Error if the system is “In Maintenance” (refer to Section 3.4.13).
+5V Supply Pass if the +5 V power supply is within the acceptable range.
+12V Supply Pass if the +12 V power supply is within the acceptable range.
+ Analog Supply Pass if the analog power supply is within the acceptable range
(+12 V).
- Analog Supply Pass if the analog power supply is within the acceptable range
(-12 V).
A2D Fail only if a problem is detected with the analog to digital
conversion.
Cell Temp. Pass if the cell heater temperature is within ± 10% of the heater set
point (refer to Section 3.4.5).
Lamp/Source Pass if the lamp current is between 15 - 50 mA.
Perm Tube Oven Pass if the Perm Tube Oven heater temperature is within ± 10% of
[IZS Internal Span Enabled] the Perm Tube Oven set point in the Hardware Menu (refer to
Section 3.4.34).
Cooler Status of the PMT cooler. It must be 13 °C ± 10% to pass.

Page 62
 Ref Voltage Pass if the reference voltage is within acceptable limits (1 - 4 V).
High Voltage Fail if the high voltage value is < 20 or > 30 from the target.
Target is 700 V.
System Power Pass if the system has an adequate electrical supply.
Diagnostic Mode Error if the electronics are in Diagnostic Mode (refer to Section
3.4.14).
Diagnostic PTF Comp Error if the Pres/Temp/Flow Comp. is disabled (refer to Section
3.4.14).
Diagnostic Control Error if the control loop is disabled (refer to Section 3.4.14).
Valve Manual Control Error if the valve sequencing is disabled (refer to Section 3.4.17).
SO2 Conc V Saturated Indicates if the voltage of the concentration during measurement
is within the limits of the analog to digital converter (-0.26 V to
3.29 V).
Bkgnd Conc V Saturated Indicates if the voltage of the concentration during background
measurement is within the limits of the analog to digital converter
(-0.26 V to 3.29 V).
Pressure Calibration Error if the user is performing a pressure calibration.
Flow Calibration Error if the user is performing a flow calibration
[Internal Pump Enabled]
Flow Fault Ok when the instrument has acceptable sample flow based on the
difference between cell and ambient pressures.
With the internal pump option this fault is monitored by a flow
sensor.
Flow Block Temp. Pass if the flow block temperature is within 10% of the heater set
[Internal Pump Enabled] point (to keep a constant accurate flow).

Cell Press > Ambient This error occurs when the pressure inside the instrument exceeds
the ambient pressure.
Chassis Temp. Pass if the chassis temperature is within the acceptable limits (0 -
50 °C).
USB Stick Disconnected Detects whether a USB memory stick is plugged into the front USB
port.
Instrument Warmup Ok once the instrument is out of warm-up status.
Backgrounds Disabled Ok if the menu item Backgrounds in the measurement settings
menu is enabled.

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 Ser in u s ® 50 U ser M an u al 3 .3

3.4.5 Temperature Menu

Main Menu → Analyser State Menu → Temperature Menu

Figure 45 – Temperature Menu Screen

Temperature Units The current temperature units of the instrument (Celsius,

Fahrenheit or Kelvin).
Set Point (CELL) The temperature set point of the reaction cell. The factory default is
50 °C.
Set Point (FLOW) The temperature set point of the flow block heater. The factory
[Internal Pump Enabled] default is 50 °C.

Cell Displays current temperature of the reaction cell.

Flow Block Displays the current temperature of the flow block.
[Internal Pump Enabled]
Perm Tube Oven Displays current temperature of the permeation tube oven.
[IZS Internal Span Enabled]
Chassis Displays the temperature of air inside the chassis, measured on the
main controller PCA board.
Cooler Temperature of the PMT cold block.
Chassis Humidity Displays the humidity percentage of air inside the chassis, measured
on the main controller PCA board.

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3.4.6 Pressure & Flow Menu
Main Menu → Analyser State Menu → Pressure & Flow Menu

Figure 46 – Pressure & Flow Menu Screen

Pressure Units Select the units that the pressure will be displayed in (torr, PSI, mBar,
ATM or kPa).
Ambient Current ambient pressure.
Cell Current pressure within the reaction cell.
Flow Units Select the units that the sample flow will be displayed in (slpm or L/min).
Flow Set Point User selectable instrument sample flow target.
[Internal Pump Enabled]
Sample Flow Indicates the gas flow through the sample port of the instrument. The
value should be ~0.73 slpm. If there is an error with the sample flow, it
will read 0.00 slpm.

Note: It is the user’s responsibility to select the correct Flow Units when calibrating the flow.

3.4.7 Voltage Menu

Main Menu → Analyser State Menu → Voltage Menu

Figure 47 – Voltage Menu Screen

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High Voltage The voltage applied to the PMT (normally set to 700 volts ± 15 V for
ambient applications).
Lamp Current Displays the UV lamp current in mA.
Conc. Voltage (RAW) Voltage from the sensor proportional to the detected signal from the
reaction cell. This voltage represents the actual measurement of gas.
Conc. Voltage Displays the detector voltage after PGA scaling.
Ref. Voltage Displays the detector voltage after PGA scaling.
Flow Voltage The current voltage measured from the sample flow.
[Internal Pump Enabled]
+5V Supply +5 V power supply.
+12V Supply +12 V power supply.
+ Analog Supply +12 V (primary) power supply. The value should be within ± 2 V.
- Analog Supply -12 V (primary) power supply. The value should be within ± 2 V.

3.4.8 General Settings Menu

Main Menu → General Settings Menu

Figure 48 – General Settings Menu Screen

Decimal Places Select the number of decimal places (0 - 5) used for the concentration
displayed on the home screen.
Conc. Units Sets the concentration units (ppm, ppb, ppt, mg/m3, μg/m3 or ng/m3).
Reference Temperature This option only appears if concentration units are set to gravimetric
[Gravimetric Units] (mg/m3, μg/m3 or ng/m3).
Select either 0 °C, 20 °C or 25 °C as the reference temperature to be used
for the conversion of the measured volumetric values to mass values.
Temperature Units Select the units that temperature will be displayed in (Celsius,
Fahrenheit or Kelvin).
Pressure Units Select the units that the pressure will be displayed in (torr, PSI, mBar,
ATM or kPa).
Flow Units Select the units that the sample flow will be displayed in (slpm or L/min).

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 Date Displays the current date and allows users to edit if required.
Time Displays the current time and allows users to edit if required.
Backlight Select the length of time the screen and keypad backlight remain ON
after a button press. The setting Always Off means the backlight never
turns ON; the setting Always On means the backlight never turns OFF
and the setting Daytime means the backlight will turns ON from 7 am to
7 pm or 30 minutes after any operation.
Home Screen This field allows the user to display concentrations on the home screen
in two formats. The first is Inst. only which displays only the
instantaneous concentration reading, the second is Inst & Avg which
displays both instantaneous and average concentration on the home
screen. The average is measured over the time period set in
Measurement Settings Menu (refer to Section 3.4.9).
Char 0 has Slash When enabled, the instrument will display the zero character with a
slash (0) to differentiate it from a capital ‘O’.

3.4.9 Measurement Settings Menu

Main Menu → Measurement Settings Menu

Figure 49 – Measurement Settings Menu Screen

Average Period Set the time period over which the average will be
calculated: Minutes (1, 2, 3, 4, 5, 6, 10, 12, 15, 20 or
30) or hours (1, 2, 4, 6, 8, 12 or 24) or rolling hourly
averages over the last (4 or 8) hours
Cal. Average Period When Enabled can set the time period over which
the calibration average will be calculated when the
system is in Cal. Mode SPAN or ZERO: Minutes (1, 2,
3, 4, 5, 6, 10, 12, 15, 20 or 30) or hours (1, 2, 4, 6, 8,
12 or 24) or rolling hourly averages over the last (4
or 8) hours. Default is Disabled.
Min. Data Capture Controls how much of the previous time period
needs to be included before the average yields a
number.
The default is 0%, which reflects past behaviour of
the instrument: turning on a machine with 15

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 Ser in u s ® 50 U ser M an u al 3 .3

minute averaging any time between 1:01 - 1:14 with

a setting of 0% would produce #### until 1:15
(because by 1:15, there was at least 1 valid
measurement to construct the average from).
However, a setting of 100% would mean the value
stayed #### until 1:30 (because there needs to be a
complete 15 minutes worth of measurements to
construct the average from).
Filter Type Sets the type of digital filter used (None, Kalman, 10
sec, 30 sec, 60 sec, 90 sec, 300 sec or Rolling).
The Kalman filter is the factory default setting and
must be used when using the instrument as a U.S.
EPA equivalent method or to comply with EN
certification. The Kalman filter gives the best overall
performance for this instrument.
Rolling Size Sets the number of measurements included in the
[Rolling Filter] rolling average. Only available if the Filter Type is set
to Rolling.
Backgrounds The default setting is enabled. When enabled it
allows the user to edit the background interval via
the following fields Time, Repeat and Units.
When any of the backgrounds fields are edited the
instrument will automatically calculate the date and
time the next background is due to run and display
under each relevant field.
Date Displays the date that the next background is due to
[Backgrounds Enabled] run.

Time Edit and display the time that the next background
[Backgrounds Enabled] will run. The time is set using a 24 hour clock.

Repeat Defines an interval value for the repeat of the

[Backgrounds Enabled] background based on the Units selected. This field
indicates the delay period; once the specified
amount of time has lapsed the background will
automatically run again. The user can edit this field
but some restriction applies depending on the Units
selected. Default is “1”.
Units This is where the user can define the type of units
[Backgrounds Enabled] for the Repeat delay period. For example: A Repeat
of “1” and Units of “Days” means that a calibration
will automatically run every day at the defined time.
Default is “Days”.

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3.4.10 Calibration Menu
Main Menu → Calibration Menu

Calibrating the instrument should be done with care (refer to Section 5 before using these menus).

Figure 50 – Calibration Menu Screen

Cal. Type Depending on the selection in this field, a number of extra menu items
will be displayed. These are separately documented in Manual Mode
(refer to Section 3.4.10.1) and Timed Mode (refer to Section 3.4.10.2).
Select the Cal. Type field and select either Timed or Manual.
Timed mode is an automatic calibration controlled by the:
▪ Interval between cycles
▪ Length of each calibration cycle
▪ Time when the calibration will begin
▪ Check only or automatic compensation
Timed calibration with span compensation enabled does not fulfil U.S.
EPA approval.
Manual mode allows the user to choose the type of calibration they wish
to perform and will open the appropriate valves in preparation for the
user to perform a manual calibration. The setup used will depend on the
Cal. Mode selected.
Manual mode is set as default.
Zero Source Select whether the instrument will sample from the external calibration
port or from the internal zero source when zero gas is requested.
Span Source Select whether the instrument will sample from the external calibration
[IZS Internal Span Enabled] port or from the internal IZS source when span gas is requested.

Cycle Time The duration of each Cal. Mode (span and zero) when performing Cycle
Mode (refer to 3.4.10.1) or Cal. Type is set to Timed (refer to Section
3.4.10.2).
Span Calibrate SO2 This field is used to perform a span calibration and should be only used
when a known concentration of span gas is running through the reaction
cell and the reading is stable.
Activating the span calibrate field for a named gas will open a dialog box.
Enter the concentration of the span gas that the instrument is sampling
and press Accept.

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Perm Conc This is the calculated concentration of the gas being released from the
[IZS Internal Span Enabled] permeation oven based on the user settings defined in the Hardware
Menu. This value should be referred to when selecting internal span
mode.
Zero Calibrate SO2 This command is used to correct the zero calibration setting. This option
should be used only when zero gas is running through the reaction cell
(refer to Section 5 before using this command).
Manual Background Selecting start will immediately perform a background.
Pressure Calibration Menu Refer to Section 3.4.11.
Flow Calibration Menu Refer to Section 3.4.12.
[Internal Pump Enabled]
Pressure SO2 This field displays the reaction cell pressure measured during the last
calibration.
Temperature Reaction cell temperature when the last span calibration was performed.

3.4.10.1 Manual Mode

These items appear in the Calibration Menu when Cal. Type is set to Manual.

Cal. Mode When calibration type is set to Manual the instruments operational
mode can be chosen from the following:
▪ Measure (default): Is the normal measurement through the sample
port.
▪ Zero: This mode will take air through the calibration port so that a
zero calibration can be performed. Data is flagged as zero data.
▪ Span: This mode will take air through the calibration port so that a
span calibration can be performed. Data is flagged as span data.
▪ Cycle: Performs a zero and a span Cal. Mode and then returns to
measure mode. The length of time spent measuring each calibration
mode is set in Cycle Time (refer to Section 3.4.10.1).
While the instrument is still in the warm-up period (refer to Section 3.1)
the Cal. Mode cannot be changed from Measure mode.

3.4.10.2 Timed Mode

These items appear in the Calibration Menu when Cal. Type is set to Timed.

Date Enter the date for the next calibration to start.

Time Enter the time that calibration will be performed. The time is set using a
24 hour clock.
Repeat This field indicates the delay period; once the specified amount of time
has lapsed the calibration will automatically run again. The user can edit
this field (from 1 - 20,000 units).
Units This is where the user can define the type of units for the Repeat delay
period. For example: A repeat of “3” and units of “Days” means that a
calibration will automatically be performed every three days.

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 Span Compensation When Enabled the instrument will automatically perform a Span
Calibrate SO2 at the end of the Cycle Time and adjust the gain based on
the Span Level.
When Disabled it will do a precision check only, no adjustment is made.
Timed mode with span compensation enabled does not fulfil U.S. EPA
approval or EN certification.
Span Level Enter the concentration of span gas expected. Used when the Span
Compensation is Enabled.

3.4.11 Pressure Calibration Menu

Main Menu → Calibration Menu → Pressure Calibration Menu

Entering this menu will set the valves to the pressure calibration configuration; leaving the menu will
restore the valves to normal operation (Refer to Section 5.2).

Figure 51 – Pressure Calibration Menu Screen

Vacuum Set Pt. The zero point for the calibration. Activating this item will open a dialog
box of instructions.
Ambient Set Pt. The high point for the calibration. Activating this item will open a dialog
box of instructions.
Pressure Units Select the units that the pressure will be displayed in (torr, PSI, mBar,
ATM or kPa).
Ambient The current ambient pressure.
Cell The current pressure in the reaction cell.
The current reaction cell pressure displayed as a raw voltage.
Vacuum Cal Mode Defaults to Off. When turned On, the valves will be set to the same state
as during a Vacuum Set Pt. adjustment, but there is no adjustment.
Used for checking the accuracy of the vacuum pressure calibration.
There are no dialog boxes or prompts, so the user needs to follow
similar steps and precautions as during Vacuum Set Pt.
Ambient Cal Mode Defaults to OFF. Similar to Vacuum Cal Mode, except the valves are set
to check the ambient calibration.

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 Ser in u s ® 50 U ser M an u al 3 .3

3.4.12 Flow Calibration Menu (Optional)

Main Menu → Calibration Menu → Flow Calibration Menu

This menu only appears when the internal pump option is installed. Refer to Section 5.8 for the
calibration procedure. Setting the Pump Control to Manual will automatically disable the valve
sequencing ready for flow calibration.

Figure 52 – Flow Calibration Menu Screen

Flow Set Point The desired sample flow target.

Cell The current pressure in the reaction cell.
Cal. Point The flow at which the last flow calibration was performed. If Pump
Control is set to Manual and Internal Pump is ON, this field can be
edited to calibrate the current flow against a reference.
Calibration must be done at or near the flow set point for best results
(refer to Section 5.8).
Cal. Zero If Pump Control is set to Manual and Internal Pump is Off, activating
this command will calibrate the flow sensor zero point (refer to Section
5.8).
Sample Flow Current sample flow through the instrument. This is only accurate when
reading close to the flow calibration point.
Internal Pump This field allows the internal pump to be turned ON or OFF. This field is
only editable when the Pump Control field is set to Manual.
Pump Control Set to Manual to disable the automatic Pump Control. Auto allows the
flow PID to modify the pump coarse and fine settings. START will
transition to Auto after one second.
Coarse Internal pump speed control (Coarse). This field is only editable when
the Pump Control field is set to Manual.
Fine Internal Pump speed control (Fine). This field is only editable when the
Pump Control field is set to Manual.
Valve Menu Refer to Section 3.4.17.

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3.4.13 Service Menu
Main Menu → Service Menu

Figure 53 – Service Menu Screen

Diagnostics Menu Refer to Section 3.4.14.

Calculation Factors Menu Refer to Section 3.4.21.
Load Auto-Backup Config. Loads the auto-backup configuration file. The configuration is
automatically backed up every night at midnight.
Load Configuration Loads a user selectable configuration file from the USB memory stick.
Save Configuration Saves all of the EEPROM-stored user-selectable instrument
configurations to the USB memory stick (calibration and communication
settings, units, instrument gain, etc.). If there are problems with the
instrument use this function to save settings to the removable USB
memory stick and send this file (together with the parameter list save) to
your supplier with your service enquiry.
Save Parameter List Saves a text file of various parameters and calculation factors. If the user
has problems with the instrument use this function to save settings to
the removable USB memory stick and send this file (together with the
configuration save) to your supplier with your service enquiry.
Instrument This field allows the instrument to be set to either Online (normal
instrument operation) or In Maintenance (data is flagged as invalid).
Next Service Due Displays when the next scheduled service is due.
Safely Remove USB Stick This command must be activated to safely remove the USB memory
stick.
System Restart Activating this will restart the instrument.

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 Ser in u s ® 50 U ser M an u al 3 .3

3.4.14 Diagnostics Menu

Main Menu → Service Menu → Diagnostics Menu

Figure 54 – Diagnostics Menu Screen

Digital Pots Menu Refer to Section 3.4.15.

Internal Pump Menu Refer to Section 3.4.16.
[Internal Pump Enabled]
Valve Menu Refer to Section 3.4.17.
Tests Menu Refer to Section 3.4.18.
Pres/Temp/Flow Comp. On (default): Is used to compensate instrument measurements for
environmental fluctuations that might affect readings (pressure,
temperature and flow).
Off: Is used only when running diagnostics.
Control Loop Enabled (default): Allows the instrument to automatically adjust digital
pots and other outputs.
Disabled: Prevents the instrument from changing most outputs so the
service technician can manually control them.

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3.4.15 Digital Pots Menu
Main Menu → Service Menu → Diagnostics Menu → Digital Pots Menu

Digital pots are electronically controlled digital potentiometers used for adjustments to operations of
the instrument. Each of the digital pots can go from 0 - 255. This menu should be accessed only during
diagnostics.

Unless the Control Loop is Disabled (refer to Section 3.4.14), changes to the pots may be modified by
the instrument. This is intentional; some diagnostics are best done with instrument feedback and some
are best done without.

Figure 55 – Digital Pots Menu Screen

HV Auto Tuning Disabled When the instrument first starts it will tune the
high voltage supply by automatically setting the
High Volt Adj Pot. After a stable value is reached
the instrument will Disable the HV Auto Tuning.
You can force the instrument to re-tune the high
voltage supply by setting this field to Enabled and
rebooting the instrument.
High Volt Adj Pot 145 - 165 Allows manual adjustment of the PMT high
voltage supply.
High Voltage 690 - 715 The voltage applied to the PMT.
Lamp Adjust Pot 20 - 200 Adjusts the UV lamp current.
Lamp Current 34 - 36 Displays the UV lamp current in mA.
PGA Gain 1 - 128 Displays the gain of the PGA.
Input Pot 128 Reduces the raw signal to measurable level.
Conc. Voltage (raw) 0 - 3.1 The concentration voltage measured by the
analog to digital converter.
Conc. Voltage 0 - 3.1 The concentration voltage after adjustment for
the PGA gain factor.
Meas. Zero Pot 25 - 220 Maintains the electronic zero adjustment.
Ref. Zero Pot 128 Offset adjustment for the reference voltage.

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 Ser in u s ® 50 U ser M an u al 3 .3

Ref. Gain Pot 10 - 100 Adjusts the reference voltage. Occurs at start up
and when the reference voltage is too far from
the target voltage (2.5 V).
Ref. Voltage 1.5 - 3.5 The reference voltage of the detector.
Diagnostic Mode Operate Operate (default): Puts the instrument in normal
operation mode.
Preamp: Injects an artificial test signal into the
Preamplifier module mounted in the optical
bench to verify that the Preamplifier, cabling and
electronic circuitry on the main controller PCA is
operating correctly. When in this Diagnostic
Mode, adjust the Diagnostic Test Pot from
0 - 255. This will produce a change in
the concentration voltage as well as the indicated
gas concentration.
Electrical: Injects an artificial test signal into the
electronic processing circuitry on the main
controller PCA to verify that the circuitry is
operating correctly. When in this Diagnostic
Mode, adjust the Diagnostic Test Pot from
0 - 255. This will produce a change in the
concentration voltage as well as the indicated gas
concentration.
Optic [Optional]: Emits artificial light into the
Reaction Cell to simulate a real fluorescence
emission. This will verify that the PMT, Preamp
and electronic circuitry on the main controller
PCA is operating correctly. When in this
Diagnostic Mode, adjust the Diagnostic Test Pot
from 0 - 255. This will produce a change in
the concentration voltage as well as the indicated
gas concentration. This menu item is only
available if you have installed the optical test
lamp (refer to Section 3.4.34).
Diagnostic Test Pot 0 This Digital Pot is used for diagnostics only. When
in the Electrical, Preamp or Optic Diagnostic
Mode, this Digital Pot should be adjusted from
0 - 255. This will produce a change in
the concentration voltage as well as the indicated
gas concentration.

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3.4.16 Internal Pump Menu (Optional)
Menu → Service Menu → Diagnostics Menu → Internal Pump Menu

This menu only appears when the internal pump option is installed. Setting the Pump Control to
Manual will automatically disable the valve sequencing.

Figure 56 – Internal Pump Menu Screen

Flow Set Point The desired sample flow target.

Cell The current pressure in the measurement cell.
Sample Flow Current gas flow. This is only accurate when reading close to the flow
calibration point.
Internal Pump This field allows the internal pump to be turned ON or OFF. If the user
adjusts this field the Pump Control will automatically change to Manual.
Pump Control Set to Manual to disable the automatic flow control. Auto allows the flow
PID to modify the pump coarse and fine settings. START will transition to
Auto after one second.
Coarse Internal pump speed control (Coarse). This field is only editable when the
Pump Control field is set to Manual.
Fine Internal Pump speed control (Fine). This field is only editable when the
Pump Control field is set to Manual.

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3.4.17 Valve Menu

Main Menu → Service Menu → Diagnostics Menu → Valve Menu

The Valve Menu allows the user to observe the instrument controlled switching of the valves. If the
valve is On it means the valve is energised. When a three way valve is in the On state it will now be in
the NC (normally closed) position as shown in the plumbing schematic. When the Valve Sequencing is
Disabled the user has the ability to turn the valve Off and On manually. It is recommended that the
Valve Menu be used by a trained technician following the plumbing schematic (refer to Section 9.5).

Figure 57 – Valve Menu Screen

Note: When interpreting the information below regarding the flow path through the valve note
that (NC = Normally Closed), (NO = Normally Open) and (C = Common).

Valve Sequencing When Enabled the valves will turn ON and OFF under the
instruments control (even if the user has manually turned Off
or On a valve).
When Disabled the valves will change only in response to a
user’s action.
Sample/Cal Indicates if the Sample/Cal valve on the Calibration Valve
Manifold is Off or On. This will determine the port the
instrument draws its sample from.
Off = Flow from NO to C (drawing sample from the Sample
Port).
On = Flow from NC to C (drawing sample from the Calibration
Port).
Internal Zero/Cal Indicates if the Internal Zero/Cal valve on the Calibration Valve
Manifold is Off or On. This will determine the port the
instrument draws its sample from, when selecting Cal. Mode →
Zero.
Off = Flow from NO to C (drawing sample from the BGnd Air
Port).
On = Flow from NC to C (drawing sample from the Calibration
Port).
Pressurised Zero (OPT) Indicates if the optional pressurised zero port valve is Off or On
(refer to Section 8.8).

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 Pressurised Span (OPT) Indicates if the optional pressurised span port valve is Off or On
(refer to Section 8.8).
Internal Span A When Internal Span A and B are On the instrument will sample
[IZS option] from the BGnd Air Port drawing internal zero or internal span
depending on the Internal Zero/Cal valve (refer to Section 8.7).
Internal Span B Same as Internal Span A above (refer to Section 8.7).
[IZS option]

3.4.18 Tests Menu

Main Menu → Service Menu → Diagnostics Menu → Tests Menu

Figure 58 – Tests Menu Screen

Screen Test Performs a screen test by drawing lines and images on the screen so that
the operator can determine if there are any faults in the screen. Press a
keypad key to step through the test.
The up and down arrow keys will adjust the contrast.
Digital Input Test Menu Refer to Section 3.4.19.
Digital Output Test Menu Refer to Section 3.4.20.

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 Ser in u s ® 50 U ser M an u al 3 .3

3.4.19 Digital Input Test Menu

Main Menu → Service Menu → Diagnostics Menu → Tests Menu → Digital Input Test Menu

Figure 59 – Digital Input Test Menu Screen

Input 0..7 Displays the status of the 0 - 7 digital input pins and their corresponding
pin out on the analog & digital I/O socket (refer to Figure 84). Value will
be 0 or 1.

Note: Entering the Digital Inputs Menu will temporarily disable all digital and analog
input/outputs. This will affect logging via these outputs. Exiting the menu restores automatic
control.

3.4.20 Digital Output Test Menu

Main Menu → Service Menu → Diagnostics Menu → Tests Menu → Digital Output Test Menu

Figure 60 – Digital Output Test Menu Screen

Automated Test When started will automatically step through each output, turning it
On and Off.
Output 0..7 Displays the state of the output pin (On or Off) and allows the user to
manually set the state.

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 Note: Entering the Digital Outputs Menu will temporarily disable all digital and analog
input/outputs. This will affect logging via these outputs. Exiting the menu restores automatic
control.

3.4.21 Calculation Factors Menu

Main Menu → Service Menu → Calculation Factors Menu

The Calculation Factors Menu provides the user with the values used to calculate different aspects of
measurement and calibration.

Figure 61 – Calculation Factors Menu Screen

Instrument Gain A multiplication factor used to adjust the concentration

measurement to the appropriate level (set at calibration).
Zero Offset SO2 This field displays the offset created from a zero calibration.
This is the concentration measured from zero air and is
subtracted from all readings.
Background The correction factor calculated from the background cycle
(used to eliminate background interferences).
PTF Correction SO2 Displays the correction factor applied to the concentration
measurement. This correction is for changes in pressure,
temperature and flow since the last calibration.
Noise The standard deviation of the concentration. The calculation
is as follows:
Take a concentration value once every two minutes.
Store 25 of these samples in a first in, last out buffer.
Every two minutes, calculate the standard deviation of the
current 25 samples. This is a microprocessor-generated field
and cannot be set by the user.
This reading is only valid if zero air or a steady concentration
of span gas has been supplied to the instrument for at least
one hour.
Undiluted SO2 Displays the actual reading on the analyser before the
dilution ratio is applied. If the Dilution ratio is 1 both
Undiluted SO2 and Diluted SO2 field will be the same value.

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 Ser in u s ® 50 U ser M an u al 3 .3

Dilution Ratio Entering a value here will multiply the displayed and recorded
measurements by the dilution amount. For example, if the
instrument is measuring a source where the average
concentration is above the upper limit of the measurement
range, a dilution probe with a fixed dilution ratio can be used
to reduce the level measured by the instrument, so for a 4:1
dilution ratio, enter a value of 4.
Enter the ratio here so the analyser can display the correct
value on the instrument.
The default value is 1.00 (this indicates no dilution is applied).
Diluted SO2 Displays the current reading on the analyser after the dilution
ratio is applied. If the Dilution ratio is 1 both Undiluted SO2
and Diluted SO2 field will be the same value.

3.4.22 Communications Menu

Main Menu → Communications Menu

Configures how the instrument communicates with external instrumentation and data loggers.

Figure 62 – Communications Menu Screen

Data Logging Menu Refer to Section 3.4.23.

Serial Communication Menu Refer to Section 3.4.24.
Analog Input Menu Refer to Section 3.4.25.
Analog Output Menu Refer to Section 3.4.26.
Digital Input Menu Refer to Section 3.4.27.
Digital Output Menu Refer to Section 3.4.28.
Network Menu (Optional) Refer to Section 3.4.29.
Bluetooth Menu Refer to Section 3.4.30.

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3.4.23 Data Logging Menu
Main Menu → Communications Menu → Data Logging Menu

When editing the numeric or text menus, the “-” key will delete the current parameter and move the
others up to take its place; the “+” key will insert a parameter at the current location and move the
ones below it down. The internal logger can log a maximum of 12 parameters.

Figure 63 – Data Logging Menu Screen

Data Log Interval Displays the interval at which the data is saved to the
USB memory stick. Selecting a 1 sec interval may result
in occasional measurements not being logged or slow
response to serial commands.
Cal. Log Interval When enabled displays the interval at which the data is
saved to the USB memory stick for the calibration time
period. This occurs when the system is in Cal. Mode
SPAN or ZERO. Selecting a 1 sec interval may result in
occasional measurements not being logged or slow
response to serial commands. Seconds (1, 2, 5, 10, 15,
30) or Minutes (1, 2, 3, 5, 10, 15, 20 or 30) or hours (1,
2, 4, 6, 8, 12 or 24). Default is Disabled.
Data Log Setup –Numeric Numeric list of the parameters logged. This is a quicker
way to enter parameters (for lists of parameters refer
to Table 47).
Data Log Setup –Text Select from a list of loggable parameters by name.

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 Ser in u s ® 50 U ser M an u al 3 .3

3.4.24 Serial Communication Menu

Main Menu → Communications Menu → Serial Communication Menu

Figure 64 – Serial Communication Menu Screen

Serial ID This is the ID of the instrument when using multidrop RS232

communications. This ID can be changed to support multiple
instruments on the same RS232 cable.
Bayern-Hessen ID This is the Bayern-Hessen ID used by the Bayern-Hessen Protocol.
[Bayern-Hessen Protocol]
SO2 ID This is the ID of the SO2 gas used by the Bayern-Hessen Protocol.
[Bayern-Hessen Protocol]
Service port (RS232 #1) The port parameters below are repeated for each serial port.
Multidrop port (RS232 #2)
Serial Delay Some older communication systems require a delay before the
instrument responds to a serial command. The number of
milliseconds of delay required (0 - 1000). The default is 0, meaning
the instrument responds as quickly as possible to any serial
request.
Baudrate Sets the baud rate for this serial port (1200, 2400, 4800, 9600,
14400, 19200, 38400 or 115200).
Parity This controls the Parity of RS232 communication.
This should be left at the default None, unless your system
requires otherwise.
Protocol Sets the protocol used for this serial port (Advanced, ModBus,
EC9800 or Bayern-Hessen). The protocol must be set to Advanced
for Acoem Australasia supplied software.
Endian Select Little or Big endian mode for ModBus protocol.
[Modbus Protocol]

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3.4.25 Analog Input Menu
Main Menu → Communications Menu → Analog Input Menu

The Serinus supports three analog inputs from the analog & digital I/O port. Each input is a 0 - 5 volt
CAT 1 input that can be scaled and logged to the USB memory stick or accessed remotely as parameters
199 - 201.

CAUTION
Exceeding these voltages can permanently damage the instrument and void the
warranty.

Figure 65 – Analog Input Menu Screen

Input 1/2/3 The sections below are repeated for each analog input.
Multiplier The input voltage will be multiplied by this number. For example, if
a sensor has a 0 - 5 V output for a temperature of
-40 °C to 60 °C, the multiplier would be (60 - (-40))/5 = 20.
Offset This value will be added to the above calculation. Continuing the
example in the multiplier description, the offset should be set to -
40, so that a voltage of 0 V will be recorded as -40 °C.
Reading The current reading from the analog input, after the multiplier and
offset are applied. This is the value that is logged or reported as
parameter 199 - 201.

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 Ser in u s ® 50 U ser M an u al 3 .3

3.4.26 Analog Output Menu

Main Menu → Communications Menu → Analog Output Menu

Figure 66 – Analog Output Menu Screen

Output Mode The analog output can be set to be either Current or Voltage.
Different fields will be displayed depending on which analog output
type is selected.
Channel 0/1/2 Channel 0 as default will be setup to be Parameter 50, which is
primary gas instantaneous reading. All three channels can be user
defined to any of the available parameters (for a list of parameters
refer to Table 47). All the labels below are repeated for each Channel.
Name Text list of the parameter defined to output through the analog output
(for a list of parameters refer to Table 47).
Parameter Numeric list of the parameter defined to output through the analog
output. This is a quicker way to enter parameters (for a list of
parameters refer to Table 47).
Min Range Set the lower range limit (in concentration units). This is the value at
which the analog output should be at its minimum. For example, 4 mA
for a 4 - 20 mA current output.
Max Range Set the upper range limit (in concentration units). This value can be
edited but cannot exceed the Over-Range value. This is the value at
which the analog output should be at its maximum. For example, 20
mA for a current output.
Over-Ranging Set to Enabled or Disabled to turn the over-ranging feature ON or OFF.
Over-Range This field is only editable when Over-Ranging is set to Enabled. Set to
the desired over range value. This value cannot be set below the Max
Range value. This is the alternate scale the used for the analog output
when over-ranging is active and enabled. When 90% of the standard
range is reached, this over range is automatically entered. When 80%
of the original range is reached, it returns to the original range.
Hold for Cal. When Enabled, putting the instrument into any calibration state other
than MEASURE will cause it to continue reporting the last reported
value.

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3.4.26.1 Analog Output Menu - Voltage
Main Menu → Communications Menu → Analog Output Menu

These items appear when Output Mode is set to Voltage.

Voltage Offset Choices are 0 V, 0.25 V or 0.5 V. This offsets the voltage for a
concentration reading of 0. Since the output cannot go negative,
this offset can be used to record negative readings.
0.5V Calibration Enables the user to calibrate the analog voltage output at a low
point. Edit the value against a reference volt meter until the
connected equipment reads 0.5 V (refer to Section 4.4.1.1).
5.0V Calibration Enables the user to calibrate the voltage output at a full scale point
(5 V). Edit the value against a reference volt meter until the
connected equipment reads 5 V (refer to Section 4.4.1.1).

3.4.26.2 Analog Output Menu - Current

Main Menu → Communications Menu → Analog Output Menu

These items appear when Output Mode is set to Current.

Current Range Enables the user to set their desired current range. The user’s
choices are 0 - 20 mA, 2 - 20 mA or 4 - 20 mA.
4mA Calibration Enables the user to calibrate the current output at a low point. Edit
the value against a reference amp meter until the connected
equipment reads 4 mA (refer to Section 4.4.1.2).
20mA Calibration Enables the user to calibrate the current output at a full scale point
(20 mA). Edit the value against a reference volt meter until the
connected equipment reads 20 mA (refer to Section 4.4.1.2).

3.4.27 Digital Input Menu

Main Menu → Communications Menu → Digital Input Menu

This menu is used to remotely trigger zero and span calibrations. This is done by assigning the eight
digital inputs with one of the following commands.

Figure 67 – Digital Input Menu Screen

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 Ser in u s ® 50 U ser M an u al 3 .3

DI N (Pin X) Associates an action with a digital input. There are eight digital
inputs (the pin numbers are for the 25 pin connector). Each one can
have one of the following associated actions, triggered when the
corresponding digital input goes to the Active state:
▪ Disabled: No action (this digital input does nothing).
▪ Do Span: Used to perform a span precision check. When
activated the instrument sets the Cal. Mode to Span (refer to
Section 3.4.10.1).
▪ Do Zero: Used to perform a zero precision check. When
activated the instrument sets the Cal. Mode to Zero (refer to
Section 3.4.10.1).
Active Each pin can be set to be active High or Low. Active High means
that the event will be triggered when the line is pulled to 5 V. Active
Low means that the event will be triggered when the line is pulled
to 0 V.

Example
Here is a typical configuration between an instrument and either a data logger or calibrator (master
device):

1. Set the jumper JP1 to 5 V position (refer to Section 4.4.3).

2. Connect one of the master devices digital output signals to pin 18 and the ground signal to pin 5
of the instrument’s analog/digital 25 pin female connector (refer to Figure 84).
3. Program master device to output 0 volts to pin 18 when a span is desired.
4. In the instrument’s Digital Input Menu assign DI 0 → Do Span - Accept.
5. The same procedure can be followed to also activate zero calibrations. Pin 6 of the instrument’s
analog/digital 25 pin female connector can be connected to one of the other master devices digital
outputs and the instrument can be set so DI 1 is assigned to Do Zero.

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3.4.28 Digital Output Menu
Main Menu → Communications Menu → Digital Output Menu

This allows the instrument to trigger external alarms in response to certain events. There are eight
different pins available, which will be set high during an associated event:

Figure 68 – Digital Output Menu Screen

DO N (Pin X) Associates a state with a digital output. There are eight digital
outputs (the pin numbers are for the 25 pin connector). Each one
can have one of the associated states listed in Table 5. The pin will
be driven to the active state while the instrument state is true.
Active Each pin can be set to be active High or Low. Active High means
that the pin will be pulled to 5 V when the associated event occurs.
Active Low means the pin will be pulled to 0 V when the associated
event occurs.

Table 5 – Digital Output States

Digital Output State Description

Disabled No state (this state is never Active).
High Volt. Fail High voltage fault.
Pwr Supply Fail Power supply fault.
Ref Volt. Fail Reference voltage fault.
A2D Fail Analog to digital fault.
Lamp Fail Lamp fault
Flow Fail Sample flow fault.
Cell Heat Fail Cell heater fault.
Flow Heat Fail Flow block heater fault.
Lamp Heat Fail Lamp heater fault.
Chassis Tmp Fail Chassis temperature fault.
Cooler Fail Cooler temperature fault.

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 Ser in u s ® 50 U ser M an u al 3 .3

Digital Output State Description

USB Disconnected The USB memory stick is disconnected.
Background Performing a background.
Span Performing a span check.
Zero Performing a zero check.
System Fault Any system fault (the red light is ON).
Maintenance Mode User has activated maintenance mode.
Over Range AO 0 Over range for the analog output when channel 0 is active.
Over Range AO 1 Over range for the analog output when channel 1 is active.
Over Range AO 2 Over range for the analog output when channel 2 is active.

3.4.29 Network Menu (Optional)

Main Menu → Communications Menu → Network Menu

The Network Menu only appears when the Network Port is enabled in the Hardware Menu (refer to
Section 3.4.34). The Network Menu allows the user to view or set the IP Address, Netmask and
Gateway if the optional network port is installed.

Figure 69 – Network Menu Screen

Start-up Mode The following modes are available:

Normal: In this mode nothing is done with the network port
during boot-up. It is assumed to be configured correctly or
unused.
Read IP: This mode interrogates the network port for its IP
address. The menu will display the network address after boot-
up.
Set IP: The user may enter an IP address, Netmask and Gateway
address (following the usual rules for formatting these
addresses). At this time the instrument does not validate the
correctness of these entries. When you cycle power, the
instrument will first instruct the network port on its new address.
It will switch to Read IP mode and read back the address it just
set so the user may verify it in the menu.

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 Set DHCP: This sets the network port into DHCP mode, allowing
the network to assign the instrument an IP address.
IP Address This is the current IP address of the instrument.
[Read IP or Set IP Start-up Mode]
Netmask This is the subnet mask of the network the instrument is
[Read IP or Set IP Start-up Mode] connected to.

Gateway This is the IP address of the router to access addresses not on the
[Read IP or Set IP Start-up Mode] same subnet.

ID This is the ID of the instrument. Use the keypad to edit this field.
[Set DHCP Start-up Mode] The default ID setting is Serinus(Ecotech ID).
The word Serinus is always the first part of the name and cannot
be edited. The second part is the Ecotech ID.
Adaptor is in DHCP mode In this mode the instrument will ask for its network parameters
[Set DHCP Start-up Mode] from a DHCP server on your network.

Protocol Sets the protocol used for the network port (Advanced, ModBus,
EC9800 or Bayern-Hessen). This must be set to Advanced for
Acoem Australasia supplied software.
Endian Select Little or Big endian mode for ModBus protocol.
[Modbus Protocol]
Bayern-Hessen ID This is the Bayern-Hessen ID used by the Bayern-Hessen Protocol.
[Bayern-Hessen Protocol]
SO2 ID This is the ID of the SO2 gas used by the Bayern-Hessen Protocol.
[Bayern-Hessen Protocol]

To read the IP address, refer to Section 4.3.1.

To set the IP address, refer to Section 4.3.2.

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 Ser in u s ® 50 U ser M an u al 3 .3

3.4.30 Bluetooth Menu

Main Menu → Communications Menu → Bluetooth Menu

This instrument supports Bluetooth communication through the Serinus Remote Android Application
(refer to Section 4.7).

Figure 70 – Bluetooth Menu Screen

Bluetooth This field indicates whether the instrument is remotely connected

to an Android device.
Reset After changing the ID or PIN, it is necessary to reboot the Bluetooth
module. This is done by resetting the instrument or by using this
menu item to reboot only the Bluetooth.
ID This is the Bluetooth ID of the instrument. Use the keypad to edit
this field.
The default ID setting is Serinus(Ecotech ID).
The word Serinus is always the first part of the name and cannot be
edited. The second part is the Ecotech ID.

3.4.31 Trend Display Menu

Main Menu → Trend Display Menu

Figure 71 – Trend Display Menu Screen

Name Displays the name of the Parameter the user has selected.

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 Parameter Allows the user to select any loggable (refer to Table 47) parameter
to graph on the trend display.
Autoscale Autoscale can be ON or OFF. When it is “ON” the parameter will be
scaled automatically for user convenience based on the current
values logged.
Min This is the minimum scale of the chart as defined by the Autoscale
or the user.
Max This is the maximum scale of the chart as defined by the Autoscale
or the user.
Clear Clears the current data points in the Chart.
Data Log Interval The data log interval can be user set from 1 sec interval up to 24
hours.
Chart This field enters a screen with a graph of the user selected
Parameter (refer to Section 3.4.32).

3.4.32 Chart
Main Menu → Trend Display Menu → Chart

The chart allows the user to select a parameter and view it in a real time chart. The user can select
from any loggable parameter (refer to Table 47). Changing the logged parameter will reset the chart.
Pressing the Up or Down buttons will change between the selected parameter and the instantaneous
SO2 gas value. Changing the Data Log Interval resets all charts.

Figure 72 – Chart Screen

Chart Title (1)

Displays the name of the parameter as it would be displayed on the advanced protocol parameter list.

Data Log Interval (2)

Displays the value of the data logging interval as determined by the user in the Trend Display Menu
(refer to Section 3.4.31).

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 Ser in u s ® 50 U ser M an u al 3 .3

Chart X-Axis (3 & 4)

(3) Displays the time stamp for the oldest data point (left hand side).

(4) Displays the time stamp for the newest data point (right hand side) or if the cursor is active it
displays the current cursor data point time stamp.

Chart Y-Axis (5 & 6)

(5) This is the minimum scale as defined by the autoscale or the user (refer to Section 3.4.31).

(6) This is the maximum scale as defined by the autoscale or the user (refer to Section 3.4.31).

Current Data Point Value (7)

Displays the current value of the newest data point unless the cursor is active then is displays the
current cursor data point value.

Units (8)
Displays the units of measure for the parameter that the user has selected.

Data Points (9)

Displays the last 240 data points recorded for the selected parameter.

Chart Cursor (10)

If the user wishes to know the value at any at a particular data point on the chart, the cursor can be
used. The cursor is activated by pressing the ( - ) key on the keypad and is represented by a vertical
line on the chart. The cursor can be moved left or right by the ( - ) or ( + ) key respectively. This cursor
location now represents the current data point value of interest. The cursor will stay with the chosen
data point and move with the updating chart. When the cursor finally hits the end of the chart it
deactivates and the current data point value will now be the latest data point entering the chart.

Mode (11)
This field indicates the SO2 concentration being measured in real-time.

Back (12)
Pressing back allows the user to access other menu items while the chart is still logging in the
background.

Digital Output State Description

Left Selection Button Returns the user back to the trend display menu.
Scrolling Buttons Using the scrolling buttons will cycle through the user selected
parameter as well as any default gas(es) currently logging.
- Button Pressing the ( - ) button will bring up the cursor and move it to the left.

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 Digital Output State Description
+ Button Pressing the ( + ) button will move the cursor to the right. When the
cursor moves all the way to the right due to the chart moving it will
deactivate.

3.4.33 Advanced Menu

This menu is accessed via a different method than the other menus. From the Home Screen press the
following keys:

This menu contains technical settings, diagnostics and factory hardware installations. No items in this
menu should be accessed without authorisation and supervision of qualified service personnel.

Figure 73 – Advanced Menu Screen

Language Select a language.

Hardware Menu Refer to Section 3.4.34.
Service Displays When set to On, new items appear on many different menus. These
fields are for diagnostic and service personnel only. Default is Off.
Next Service Due Enables the user to edit the next service due date.
Jump to Next State Moves the sequence to the next state (e.g. from Fill to Measure).
This command is most commonly used to force an instrument out
of the warm-up sequence early.
Parameter Display Menu Refer to Section 3.4.35.
Reset to Factory Defaults Reset the configuration to factory defaults. This will erase all
calibrations and user configuration information.
Rebuild Index If a data log becomes corrupted it may be possible to restore It by
rebuilding its index file. This command will ask the user to specify a
month and will rebuild the index for that month. This operation can
take many minutes and it should not be interrupted. While the file
is rebuilding any data logging will be suspended.

CAUTION
No items in this menu should be accessed without authorization and supervision
of qualified service personnel.

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 Ser in u s ® 50 U ser M an u al 3 .3

3.4.34 Hardware Menu

Advanced Menu → Hardware Menu

This menu contains factory hardware installations. If the user reset to factory defaults, then they may
need to revisit this menu to enable their installed optional features.

Figure 74 – Hardware Menu Screen

Model Select the instrument model. Normally this only needs to be

reset when the configuration is corrupted. The selections
available will depend on licensing. It is not recommended to
run an instrument with firmware set to an incorrect model.
Front Panel Style Choosing the incorrect front panel will result in the traffic lights
behaving inconsistently. Default is Aluminium.
Network Port When Enabled indicates the instrument has a network port
installed. Default is Disabled.
Orifice Size Specify the input orifice for instruments without an internal
[Internal Pump Disabled] pump. Default is 0.75.

Internal Pump When Enabled indicates the instrument has an Internal pump
installed. Default is Disabled.
Optical Test Lamp Allows optical diagnostic tests. Default is Disabled.
IZS Internal Span When Enabled indicates the IZS option is installed.
Perm Rate User should enter the value as found on the permeation tube
[IZS Internal Span Enabled] specification sheet.

Perm Flow Total flow past the permeation chamber during an activated
[IZS Internal Span Enabled] internal span mode.

Perm Tube Oven Set target temperature for the permeation oven. User
[IZS Internal Span Enabled] definable range from 47 - 53 °C. Default is 50 °C.

SO2 Lamp Target Allows the user to adjust the lamp current target. The default is
35 mA.
HV Target Set target voltage for the high voltage power supply. User
definable range from 400 - 800 V. Default is 700 V.

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 External Bkgnds When Enabled the system will not perform automatic
backgrounds and it will not warn the user that it is not doing
backgrounds. Rather it is the responsibility of the operator to
remotely trigger the backgrounds. Default is Disabled.

CAUTION
No items in this menu should be accessed without authorization and supervision
of qualified service personnel.

3.4.35 Parameter Display Menu

Advanced Menu → Parameter Display Menu

Used to display a logged parameter on the screen (refer to Table 47 for a list of parameters).

Figure 75 – Parameter Display Menu Screen

Data Parameter This is an editable field. Enter the parameter number the user
wishes to view (refer to Table 47).
Name Displays the name of the selected parameter.
Value Displays the current value of the selected parameter.

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Page 98
4. Communications
The Serinus has a number of different interfaces for communication with other equipment (RS232,
USB, 25 pin digital/analog input/output, TCP/IP network (optional) and Bluetooth). A demonstration
version of Acoem Australasia’s Airodis software is included with the instrument, enabling basic data
downloads and remote operation from a PC running a supported MS Windows operating system. The
full version of Airodis is available separately and includes automated data collection, data validation
and complex reporting by multiple users. Refer to the Airodis Manual and Section 4.6 of this manual
for details on setting up and communicating with the instrument.

Figure 76 – Communication Ports

4.1 RS232 Communication

RS232 communication is a very reliable way to access data from the instrument and is recommended
for use in connection to a data logger for 24/7 communication. Both RS232 ports are configured as
DCE and can be connected to DTE (Data Terminal Equipment such as a data logger or computer).

Port #2 also supports a multidrop arrangement (a configuration of multiple instruments connected via
the same RS232 cable where the transmit signal is only asserted by the instrument that is spoken to).

For reliable multidrop RS232 communications follow these guidelines:

 Verify that the Serial ID is set to a unique value which is different to the other instruments in the
chain (refer to Section 3.4.24).
 All of the instruments in the multidrop chain must have the same baud rate and communication
protocol settings. A maximum of 9600 baud rate is recommended.
 The multidrop RS232 cable should be kept to less than three meters in length.
 A 12K ohm terminating resistor should be placed on the last connector of the cable (connect from
pin 2 to pin 5 and from pin 3 to pin 5 - refer to Figure 77).
 The shielding of the multidrop cable must be continuous throughout the cable.
 The shielding of the multidrop cable must only be terminated at one end. It should be connected
to the metal shell of the DB 9 way connector.

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 Ser in u s ® 50 U ser M an u al 3 .3

Figure 77 – Multidrop RS232 Cable Example

4.2 USB Communication

This is ideal for irregular connection to a laptop running Acoem Australasia’s Airodis software to
download logged data and remotely control the instrument. Due to the nature of USB, this is a less
reliable permanent connection as external electrical noise can cause USB disconnection errors on a
data logger.

For more information on regarding connecting over USB, making connections refer to Section 4.6.1.1.

Note: Only the Advanced protocol is supported for USB communication.

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4.3 TCP/IP Network Communication (Optional)

Instruments with the optional network port installed can be accessed using a TCP/IP connection.
Figure 78 shows examples of some possible configurations for remote access.

Figure 78 – Example of Typical Network Setups

Note: In Figure 78 all the IP addresses are taken as an example. The WAN IP addresses are
normally provided by your ISP. Whereas, the LAN IP addresses can be set manually to any range
which is within the subnet of the Modem/Router/switch.

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 Ser in u s ® 50 U ser M an u al 3 .3

Use a cross-over LAN cable to connect the instrument directly to a computer, or a standard LAN cable
for connection to a Modem/Router/Switch as shown in Figure 78. The computer could be connected
to the Modem/Router using either CAT5 cable or a wireless connection, but the instrument must be
connected using CAT5/6 cable.

4.3.1 Reading Network Port Setup

To read the current network port settings perform the following steps:

Procedure
1. Open - Main Menu → Communications Menu → Network Menu.
2. Select - Start-up Mode → Read IP - Accept.
3. Manually use the power switch on the rear of the instrument to turn the power OFF. Leave the
instrument OFF for 10 seconds before turning the power back ON.
4. Open - Main Menu → Communications Menu → Network Menu.
5. The current network port settings will now be displayed on the screen.
6. When viewing is complete select - Start-up Mode → Normal - Accept.

4.3.2 Setting Network Port Setup

Below is an example of how to setup the network port:

Procedure
1. Open - Main Menu → Communications Menu → Network Menu.
2. Select - Start-up Mode → Set IP - Accept.
3. Edit - IP Address - (Change the IP address to the address you wish to use within the
Modem/Router/Switch Subnet).
4. Edit - Netmask - (Change the Netmask to the setup specified by the Modem/Router).
5. Edit - Gateway - (Change the Gateway to the setup specified by the Modem/Router).
6. Select - Protocol → Advanced - Accept.

Figure 79 – Example of Network Menu Setup

7. Once completed, use the power switch on the rear of the instrument to turn the power OFF. Leave
the instrument OFF for 10 seconds before turning the power back ON.

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 Note: Manually perform a hardware power cycle every time the IP address is changed for it to take
effect.

8. Open - Main Menu → Communications Menu → Network Menu.

9. The Start-up Mode automatically changes to Read IP and the current network port settings will be
displayed on the screen.
10. When viewing is complete select - Start-up Mode → Normal - Accept.

4.3.3 Port Forwarding on Remote Modem/Router Setup

When using the network port to connect to the router / modem with NAT enabled, the user will need
to add IP mapping to ensure that data is forwarded through to the desired port. This is known as port
forwarding. To set-up the port for the instrument, the user needs to go into the modem/router
configuration. Normally, the user will see the port forwarding setup under Port Forwarding, NAT or
Port Mapping menu. Below is an example port forwarding setup.

The default port for the Serinus range of instruments is 32783. The destination address is the
instrument IP address setup in the Network Menu.

Figure 80 – Port Forwarding Example

4.3.4 Setup Airodis to Communicate with Serinus

LAN
Below is an example of Airodis setup for a LAN network. Ensure the IP address is set to the same as on
the instrument Network Menu.

Figure 81 – LAN Network Set-Up (Airodis)

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 Ser in u s ® 50 U ser M an u al 3 .3

WAN
Below is an example of Airodis setup for a WAN network. Ensure the IP address is set the same as on
the remote modem/router.

Figure 82 – WAN Network Set-Up (Airodis)

4.4 Analog and Digital Communication

The 25 Pin analog and digital I/O port on the rear panel of the instrument sends and receives analog
and digital signals to other devices. These signals are commonly used to activate gas calibrators or for
warning alarms.

4.4.1 Analog Outputs

The instrument is equipped with three analog outputs that can be set to provide either voltage
(0 - 5, 0.25 - 5 or 0.5 - 5 V) or current (0 - 20, 2 - 20 or 4 - 20 mA) output. The analog outputs are tied
to user selected parameters (refer to Table 47).

For 0 - 10 V analog output operation, set the output mode to current and move the jumpers (JP3) on
the rear panel PCA to 0 - 10 V (refer to Figure 83). Ensure the Current Range is set to 0 - 20 mA to
obtain the 0 - 10 V range. When calibrating the (current) analog output with the jumper set to 0 - 10
V, the 4 mA calibration target is now a 2 V target and 20 mA calibration target is now a 10 V target.

4.4.1.1 Analog Outputs Voltage Calibration

Equipment Required

• Multimeter (set to volts)

• Male 25 pin connector with cable

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Procedure
1. Open - Main Menu → Communications Menu → Analog Output Menu (refer to Section 3.4.26).
2. Select - Output Mode → Voltage.
3. Connect a multimeter (using an appropriate adaptor or probes on the multimeter) to the ground
(pin 24) and the relevant output pin (pin 10).
4. Edit - 0.5V Calibration - (until the multimeter reads 0.500 V ± 0.002) - Accept.
5. Edit - 5.0V Calibration - (until the multimeter reads 5.00 V ± 0.002) - Accept.

4.4.1.2 Analog Outputs Current Calibration

Equipment Required

• Multimeter (set to mA)

• Male 25 pin connector with cable

Procedure
1. Open - Main Menu → Communications Menu → Analog Output Menu (refer to Section 3.4.26).
2. Select - Output Mode → Current.
3. Connect a multimeter (using an appropriate adaptor or probes on the multimeter) to the ground
(pin 24) and the relevant output pin (pin 10).
4. Edit - 4mA Calibration - (until the multimeter reads 4 mA ± 0.01) - Accept.
5. Edit - 20mA Calibration - (until the multimeter reads 20 mA ± 0.01) - Accept.

4.4.2 Analog Inputs

The instrument is also equipped with three analog inputs with resolution of 15 bits plus polarity,
accepting a voltage between 0 - 5 V. These go directly to the microprocessor and should be protected
to ensure static/high voltage does damage the main controller PCA (instrument warranty does not
cover damage from external inputs).

4.4.3 Digital Status Inputs

The instrument is equipped with eight logic level inputs for the external control of the instrument such
as Zero or Span sequences. Each input has a terminating resistor which can be either PULL UP or PULL
DOWN. This is set using the jumper JP1 on the rear panel PCA (refer to Figure 83).

4.4.4 Digital Status Outputs

The instrument is equipped with eight open collector outputs which will convey instrument status
condition warning alarms such as no flow, sample mode, etc. Two of the digital outputs can be set so
that there is +5 V and +12 V available on the 25 pin connector for control purposes, instead of digital
outputs 0 and 1.

In the default jumper locations (refer to Figure 83) these two outputs will function normally as open
collector outputs. If moved to the position closer to the 25 pin connector then the DO 0 will supply +12
V and DO 1 will supply +5 V.

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 Ser in u s ® 50 U ser M an u al 3 .3

The +12 V and +5 V supplies are limited to about 100 mA each.

Each digital output is limited to a maximum of 400 mA. The total combined currents should not exceed
2 A.

Figure 83 – Rear Panel PCA (Default Jumpers Highlighted)

Figure 84 – Analog & Digital I/O Individual Pin Descriptions

CAUTION
The analog and digital inputs and outputs are rated to CAT I.
Exceeding 12 VDC or drawing greater than 400 mA on a single output or a total
greater than 2 A across the eight outputs can permanently damage the
instrument and void the warranty.

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4.5 Logging Data

When the user receives the instrument from the factory it will have a default set of parameters already
setup in the internal data logger. These select few parameters have been chosen for their relevance in
assisting in troubleshooting the instrument.

4.5.1 Configure Instrument Internal Logging

In order to log data the user must first specify a data logging interval. This is how often data will be
logged to the USB memory stick. It is possible to log a maximum of 12 parameters. These parameters
can be selected by name or by parameter number using the parameter list as a reference (refer to
Table 47).

4.5.1.1 Data Log Setup –Numeric

Procedure
1. Open - Main Menu → Communications Menu → Data Logging Menu (refer to Section 3.4.23).
2. Select - Data Log Interval - (adjust to the desired value) - Accept.
3. Open - Data Log Setup –Numeric - (select the storage location to edit).
4. Edit - (Change the value in the selected storage location “Parameter n” to the preferred parameter
to be logged) - Accept.

4.5.1.2 Data Log –Text

Procedure
1. Open - Main Menu → Communications Menu → Data Logging Menu (refer to Section 3.4.23).
2. Select - Data Log Interval - (adjust to the desired value) - Accept.
3. Open - Data Log Setup –Text - (select the storage location).
4. Select - (Change the name in the selected storage location “Parameter n” to the preferred
parameter to be logged) - Accept.

4.6 Using Airodis Software to Download Data

4.6.1 Connecting the Instrument to a PC

This instrument can communicate with a PC using RS-232 (Serial), TCP/IP (Network), Bluetooth or USB.
Serial, Bluetooth and network communications do not require additional drivers. When using a USB
connection, the driver must be installed first.

4.6.1.1 Connecting Over USB

Before connecting the USB cable form a PC to the instrument, the Serinus USB driver must be installed.

Power ON the instrument and connect it to a PC with a USB cable. The user should receive a prompt if
the driver needs to be installed. If not, open Device Manager (Under “System” in Control Panel), find
the device and select “Update Driver Software”.

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Figure 85 – Installing Driver Software (Device Manager)

When prompted where to search for the driver, select “Browse my computer for driver software”.

Figure 86 – Update Driver Popup

The Serinus USB driver is located on the green Ecotech resources USB stick under “\Drivers\Ecotech
Analyser”. Select this directory and click Next.

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 Figure 87 – Update Driver Popup (Directory Location)

If the user receives a confirmation prompt to install the driver, select Install.

Figure 88 – Installing Driver Confirmation Prompt

If everything went smoothly, Windows will inform the user that the driver was successfully installed.

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Figure 89 – Successful Driver Installation

4.6.1.2 Connecting Over Serial (RS-232)

The following steps outline how to setup the instrument for connection to a PC or datalogger (refer to
Section 3.4.24):

Procedure
1. Open - Main Menu → Communication Menu → Serial Communication Menu.
2. Determine which RS232 Port the user is physically making the connection with. Remember,
multidrop is only supported on RS232 #2.
3. Select - Baudrate → 38400 - Accept (Set an appropriate baud rate, default is 38400).
4. Select - Protocol → Advanced - Accept.

If the user is running Airodis in a multidrop configuration, ensure that the Serial ID is unique for each
instrument on the chain.

4.6.1.3 Connecting Over Network (TCP/IP)

Refer to Section 4.3.2 to setup the instrument for connection to a PC or datalogger using a static IP
address.

4.6.2 Installing Airodis

The user can download data from the instrument using either a full retail (paid) version of Airodis or
with the demo version which is included on the green Ecotech resources USB stick. The demo version
has limited functionality, but will allow the user to download and export data from up to three
instruments. If the user doesn't have Airodis Installed, they can obtain it from the following address:

http://www.airodis.com.au

The installer is straightforward: Ensure the user selects the correct version of software to install for
their operating system. If they are running 64-bit windows, install the 64-bit (x64) version. Otherwise,
install the 32-bit (x86) version.

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4.6.3 Configuring Airodis

Procedure
1. Once installed, double click on the Airodis shortcut on the desktop to start Airodis Workspace
Manager. The user will be presented with the default workspace options. These will suffice for
downloading data from the instrument.

Figure 90 – Airodis Workspace Manager

2. Start the Client, Server and Download Server by single-clicking the toggle button for each. The
client may prompt to register with Acoem Australasia or install an update. Follow the prompts if it
does.
3. Once the Client application has loaded, click Home→Add Station→New Physical Station.

Figure 91 – Adding a New Station

4. This automatically brings the user to the Station tab on the ribbon. Enter the communication
details to connect to the instrument.

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Figure 92 – New Station Connection

Table 6 – Setting up a New Station via Airodis

Property Description
Station Name The name of the station. If you have other loggers, the name is used to distinguish
them.
Logger Set this to “Ecotech Serinus” when downloading from any Serinus series
instrument. This will communicate with the instrument via the Advanced protocol.
If using a network or serial connection, ensure that the Advanced protocol has also
been selected on the instrument itself.
Time Zone Set this to the time zone that the instrument is located in.
DST Enable this option if you plan on changing the clock on the instrument with
daylight savings. Leave this disabled if the clock does not shift during DST. The
instrument will need to be adjusted manually for DST - it will not happen
automatically.
Database Name This is the name to be used for the table in the SQL database containing this
station’s data. It must be unique for each station.
Device ID Enter the Serial ID of the instrument. If you are not using multidrop; this can be set
to “0” or left blank.
Link Type Select the type of connection used to connect to the instrument. Different
properties will appear depending on the link type selected. Align these settings
with those of the instrument.
Log Interval This needs to be the same as the Data Log Interval setting on the instrument.

Note: The available fields for communication parameters will change when you change the link
type. the user will need to set the communication parameters that have been defined on the
instrument.

5. Once the station has been created, save the station by clicking the Save shortcut icon or
File→Save.

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6. Click Acquire Configuration. This will probe the instrument for a channel list. After a few seconds,
the channel list should be visible in the Channels tab.

Figure 93 – Station Configuration (Channel List)

Note: If there was an error connecting to the instrument, a red dot will appear next to the station
name in the station list (on the far left hand side). Hovering over the red dot will present the user
with an error message (refer to Figure 94).

Figure 94 – Error Status Notification

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7. Select the Data Manager tab, click download. The Download Data window will appear. Select the
appropriate time period that the user wishes to download and click Download.

Figure 95 – Downloading Data

8. The status of the download will appear in the bottom-left corner of the window. The user can also
monitor the status of the download from the Home tab.

Figure 96 – Download Data Status

9. Data will become available in the data manager as it is downloaded. The user can load data for a
date range by entering the start and end dates and clicking Display. The selected data will be loaded
into the data manager.

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 Figure 97 – Data Visibility

10. Data can be exported by clicking the Export function. This will allow the user to save their data in
CSV format, which can be loaded into another program such as Microsoft Excel. It is also possible
to copy/paste (Ctrl + C / Ctrl + V) data directly from the Airodis data manager.

Figure 98 – Exporting Data

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11. That’s it! The data has been downloaded from the instrument and exported to a standard CSV file.

Figure 99 – Data Download Complete

4.7 Serinus Remote App/Bluetooth

The Serinus Remote Application allows for any Android device (Tablet or Smartphone) to connect to
an instrument.

The Serinus Remote Application allows the user to:

 Completely control the instrument using a remote screen displayed on the device.
 Download logged data and take snapshots of all the instrument parameters.
 Construct graphs from logged data or real time measurements.

The following sections cover installation, connection and use of the application.

4.7.1 Installation
The Serinus Remote Application can be found in the Google Play Store by searching for Ecotech or
Serinus. Once found, choose to Install the application and Open to start the application.

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 Figure 100 – Downloading the App from Google Play Store

Note: A menu containing additional features and functions can be accessed by entering the
Options Menu (or similar) on your device. The location and format of this menu may vary.

4.7.2 Connecting to the Instrument

Procedure
1. Open - Main Menu → Communications Menu → Bluetooth Menu (to find the Bluetooth ID and
PIN) (refer to Section 3.4.30).
2. Touch the Scan Serinus Analysers button at the bottom of the device screen.
3. Select the Analyser ID from either the Paired Devices or the Other Available Devices.
4. Input the PIN (if prompted) and press OK (refer to Section 3.4.30).

Figure 101 – Bluetooth Pairing Request

5. A screen shot of the instrument’s current screen should appear on the user smartphone or tablet.
To disconnect press the back key/button on the device.

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Note: Once the instrument has been paired with the device it will appear under “Paired Devices”
and the PIN will not need to be entered again. Only one Bluetooth connection can be made to an
instrument at any one time.

4.7.3 Instrument Control

Once connected the user has full control of the instrument. The range for remote control depends on
the device’s Bluetooth capabilities and any intervening obstructions, but is usually up to 30 meters.

Remote Screen Operation

With the exception of the number pad, all button functions/actions can be performed by touching the
screen. This includes the selection buttons and the scroll buttons. Touching any part of the screen
where there is not already a button also enacts the functions of the scroll buttons.

Home Screen
Touching the upper half of the screen increases the contrast and touching the lower half of the screen
decreases contrast on the real instrument.

Menus
Touching the upper or lower half of the screen allows the user to scroll up and down respectively.

Right-hand Section of the Screen

Swiping from right to left brings up the number pad for entering numbers (swipe from left to right to
hide the number pad).

Figure 102 – Showing or Hiding the NumPad

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Left-hand Section of the Screen
Swiping from left to right brings up a list of available analysers (swipe from right to left to hide the
instrument list).

Figure 103 – Switching Analysers

Back Button
This button will enable the user to return to the selection screen, allowing connection to a different
instrument.

Options Menu
The Options Menu is accessed by the grey button in the top right corner of the screen or pressing the
Menu Button, depending on the user’s Android device.

Refresh Refresh the display.

Show/Hide NumPad Show or hide the number pad.
Real Time Plot Refer to Section 4.7.4
Download Refer to Section 4.7.5.
Get Parameters Refer to Section 4.7.6.
Preferences Refer to Section 4.7.7.

4.7.4 Real-Time Plot

Allows the user to view real-time plotting of up to four parameters at the same time. The user can also
scroll from left to right, top to bottom or zoom in and out on the plot by swiping/pinching.

Once the plot is zoomed or scrolled, it enters into Observer Mode, meaning that auto-scaling is
suspended. Press at the top of the screen (where it says Observer Mode) to return to Normal Mode.

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Figure 104 – Real-Time Plot

Options Menu
The Options Menu is accessed by the grey button in the top right corner of the screen or pressing the
menu button, depending on the user’s Android device.

Start Restarts graphing if it has been stopped and returns the graph to Normal Mode.
Stop Stops collecting data. In this mode the user can scroll the display without going into
Observer Mode, because the system has no data collection to suspend. It is
necessary to “Stop” data collection to set the interval.
Clear Clears the window and restarts the graphing.
Save Saves an image of the graph and accompanying data in the location specified in
preferences (refer to Section 4.7.7). The user will also be asked whether they want
to send the file and data via email. When saving the data, the user can choose to
Save All Data or Customise the length of the data by entering a time between five
minutes and six hours. Only the data from the start of collection to that limit will be
saved (although the plot will still appear exactly as it does on the screen).
Set Interval While data collection is stopped, the user can specify the time intervals between
collections.

4.7.5 Download
Download logged data from the USB memory stick inside the instrument. All data logged by the
instrument to the USB memory stick over the period of time specified will be collected. Due to the
slow connection speed of Bluetooth, this should only be used for relatively short sections of data.
Downloading one days’ worth of one minute data is likely to take a couple of minutes.

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Options Menu

Save Generates a filename based on the start and end date/time specified. It saves the
downloaded data in the location specified in preferences and asks to send the saved
comma separated text file (.csv) as an attachment to an email. This file format does not
include the parameter headings, just the values.
Send E-Mail Sends an email with the parameter data in the body of the email, formatted as displayed
(this includes the parameter name and the values).
Plot Graphs the data that has been downloaded. The user is prompted to select which
parameters to plot based on the parameters that were being logged (refer to Figure 105)
Preferences Refer to Section 4.7.7.

Figure 105 – Plot of Downloaded Data

4.7.6 Get Parameters

Download a list of parameters and corresponding values directly from the instrument. This list of
parameters is a snap shot of the current instrument state and is very helpful in diagnosing any
problems with the instrument.

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Options Menu

Get Parameters Refreshes the parameter list display.

Save Generates a filename from the current date and time. It saves the
parameter data in the location specified in preferences and asks to send
the saved text file as an attachment to an email.
Send E-Mail Sends an email with the parameter data in the body of the email,
formatted as displayed.
Preferences Refer to Section 4.7.7.

4.7.7 Preferences
The Preferences Menu allows the operator to adjust the directory settings, logged data format and the
colour scheme settings. It can be accessed through the Options Menu in most windows.

Directory Settings
The operator can specify/select where to save the parameter lists, logged data and real time plots.

Figure 106 – Directory Settings

Logs Format
When downloading logged data, the parameters can be displayed on one line or each parameter on a
separate line.

Figure 107 – Logs Format

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Colour Theme Settings
Allows the user to choose a colour scheme for the remote screen, either Matrix, Classic, Emacs or
Custom.

Figure 108 – Colour Theme Settings

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5. Calibration
The following sections describe how to calibrate the span and zero points of the instrument as well as
giving a brief overview of the calibration system.

Main Menu → Calibration Menu (refer to Section 3.4.10 for information on menu items).

5.1 Overview

Figure 109 – Example of a Calibration System

CAUTION
All calibration gases must be supplied at ambient pressure to avoid damaging the
instrument. If direct gas cylinder connection is required, high pressure Span/Zero
options can be installed at time of ordering.

The calibration chapter consists of a:

 General discussion of calibration.

 Description of the pressure calibration procedure.
 Description of the Zero/Span precision check and calibration procedures.
 Description of the multipoint precision check procedure.

The Serinus 50 analyser is a precision measuring device which must be calibrated against a known
source of SO2 (e.g. a certified gas cylinder).

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There are several different types of checks/calibrations performed:

 Level 1 Calibration - A simplified two-point instrument calibration used when instrument linearity
does not need to be checked or verified. This check is typically performed on a monthly basis.
Adjustments to the instrument response can only be made when performing level 1 calibration.
 Level 2 Calibration - A simple check of the instrument’s response. Level 2 checks may be performed
using non-certified reference sources and are most often used as a performance monitoring tool.
The instrument may not be adjusted
 Multipoint Precision Check - A series of calibration points, typically covering zero and 4 up-scale
points, measured using a certified reference atmosphere and covering the instruments FS
measurement range. These precision checks are used to determine the linearity of the instrument
response across its measurement range.

In general terms, the calibration process includes the following steps:

1. Establish a reliable and stable calibration source.

2. Provide a satisfactory connection between the calibration source and the instrument.
3. Calibrate the instrument against the calibration source.

Multipoint precision check is used to establish the relationship between instrument response and
pollutant concentration over the instrument's full scale range. Zero and span calibrations are
frequently used to provide a two-point calibration or an indication of instrument stability and function.

Note: Zero calibrations are not recommended by Acoem Australasia, but may be performed when
specifically required by a user. Zero calibrations tend to mask issues that should be addressed
during maintenance/service.

Regulations generally require that the instrument be span calibrated any time:

 The instrument is moved.

 The instrument is serviced.
 When changing the instruments units between volumetric and gravimetric.
 Whenever the instrument characteristics may have changed.

Regulatory agencies establish the time intervals at which the instrument must be calibrated to ensure
satisfactory data for their purposes.

Note: Use of the Serinus 50 analyser as a U.S. EPA or EN-designated equivalent method requires
periodic multipoint precision checks in accordance with the procedure described below. In
addition, the instrument must be set to the parameters indicated in U.S. EPA (refer to Section 2.4)
or EN Equivalent Set-up (refer to Section 2.5).

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5.2 Pressure Calibration

The pressure sensors are a vital component of the instruments operation. The pressure calibration
should be checked on installation or whenever maintenance is performed.

A thorough leak check must be performed prior to performing a pressure calibration (refer to
Section 6.4.4).

The pressure calibration can either be a two point calibration (one point under vacuum and the other
at ambient pressure) or a single ambient point calibration (when very minor adjustments are required).

Note: Ensure that the instrument has been running for at least one hour before any calibration is
performed to ensure the instrument’s stability. When performing a two point pressure calibration,
it is advisable to perform the vacuum pressure calibration first.

5.2.1 Full Pressure Calibration (Two Point Calibration)

This section outlines how to perform a full pressure calibration. Using the required equipment follow
the steps below to complete a full pressure calibration.

Note: Ensure that the instrument has been running for at least one hour before the calibration is
performed.

Note: Ensure units of measure are the same on both the barometer and instrument.

Equipment Required

• Barometer
• Vacuum source

Procedure
1. Turn OFF the vacuum source and allow the instrument to return to ambient pressure.
2. Disconnect any external tubing connected to the rear of the instrument.
3. Open - Main Menu → Calibration Menu → Pressure Calibration Menu - (read note) - OK.

Note: This action will place the valve sequencing on hold; normal sampling will be interrupted.

4. Edit - Vacuum Set Pt. - (Read displayed instructions) - OK.

5. Refer to Figure 110. Connect a barometer to the BGnd Air Port.

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6. Refer to Figure 110. Connect a vacuum source to Exhaust Port of instrument.

Figure 110 – Full Pressure Calibration Set-up

7. Wait 2 - 5 minutes and ensure the pressure reading on the barometer has dropped and is stable.
8. Enter the barometer reading into the instrument - Accept.
9. Read displayed instructions - OK.
10. Turn OFF the vacuum source and slowly remove the barometer from the BGnd Air Port and allow
the instrument to return to ambient.
11. Refer to Figure 111. Disconnect the vacuum source from the Exhaust Port.

Figure 111 – Full Pressure Calibration Set-up (Ambient)

12. Wait 2 - 5 min, enter the ambient barometer reading into the instrument - Accept.

Note: Both of the pressure sensors should now be displaying the current ambient pressure and
they should be the same value within 3 torr of each other.

13. Back - Pressure Calibration Menu - (read note) - OK.

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5.2.2 Pressure Calibration (Ambient Only)
Full pressure calibrations are generally recommended, however it is possible to calibrate only the
ambient point in cases where only a minor ambient pressure adjustment is required.

Note: Ensure that the instrument has been running for at least one hour before any calibration is
performed to ensure the instrument’s stability.

Note: Ensure units of measure are the same on both the barometer and instrument.

Equipment Required

• Barometer

Procedure
1. Turn OFF the vacuum source and allow the instrument to return to ambient pressure.
2. Refer to Figure 112. Disconnect all external tubing connected to the rear ports of the instrument.

Figure 112 – Ambient Pressure Calibration Set-up

3. Open - Main Menu → Calibration Menu → Pressure Calibration Menu - (read note) - OK.
Note: This action will place the valve sequencing on hold; normal sampling will be interrupted.

4. Edit - Ambient Set Pt. - (Read displayed instructions) - OK.

5. Wait 2 - 5 minutes and enter the ambient barometer reading into the instrument - Accept.
Note: Both of the pressure sensors should now be displaying the current ambient pressure and
they should be the same value within 3 torr of each other.

6. Back - Pressure Calibration Menu - (read note) - OK.

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5.2.3 Pressure Calibration (Internal Pump Option Only)

The internal pump requires a separate pressure calibration procedure that replaces the one used in
Section 5.2.1 and 5.2.2.

Note: Ensure that the instrument has been running for at least one hour before any calibration is
performed to ensure sufficient stability.

Note: Ensure units of measure are the same on both the barometer and instrument.

Equipment Required

• Barometer
• Kynar 1/4” Blocker Nuts

Procedure
1. Disconnect any external tubing connected to the rear of the instrument.
2. Open - Main Menu → Calibration Menu → Pressure Calibration Menu - (read displayed note) -
OK.

Note: Entering this menu will switch OFF the internal pump and place the valve sequencing on
hold; normal sampling will be interrupted.

3. Edit - Vacuum Set Point - (read displayed instruction) - OK.

4. Refer to Figure 113. Connect a barometer to the BGnd Air Port.

Figure 113 – Pressure Calibration (Internal Pump Option Only) Set-up

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5. Remove the DFU from the bleed air fitting and block with a Kynar 1/4” blocker nut.

Figure 114 – DFU

6. Wait 2 - 5 minutes and ensure the pressure reading on the barometer is stable.
7. Enter the barometer reading into the instrument - Accept.
8. Read displayed instructions - OK.
9. The pump should now stop automatically. Disconnect the barometer from the BGnd Air Port.
10. Remove the Kynar 1/4” blocker nut from the bleed air fitting and replace the DFU.
11. Wait 2 - 5 minutes and enter the ambient barometer reading into the instrument - Accept.

Note: Both of the pressure sensors should now be displaying the current ambient pressure and
they should be the same value within 3 torr of each other.

12. Back - Pressure Calibration Menu - (read note) - OK.

5.3 Manual Background

A background is a measurement that is made when SO2 free air is drawn through the reaction cell. The
resulting measurement signal (background) will include signals unrelated to SO2, generated from the
PMT due to internal offsets as well as cell fluorescence. The background is an electronic baseline, it is
normally run every 24 hours automatically. There is sometimes a need for the user to run a manual
background.

Note: A manual background is recommended before commencing a multipoint precision check.

Equipment Required

• N/A

Procedure
1. Open - Main Menu → Calibration Menu.
2. Start - Manual Background → Running.

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3. Manual background will now display running and will proceed to draw air from the zero air
scrubber for 9 minutes (4 minutes of fill time and 5 minutes of measure). The user can press stop
at any time to cancel the background. At the end of the 9 minute period a new background voltage
will be recorded in the event log as well as in the Calculation Factors Menu.

5.4 Zero Calibration

Zero calibrations are used to determine the zero response of the instrument and apply an offset to the
reading.

Performing a zero calibration will adjust the Zero Offset SO2. This offset can be checked in the Main
Menu → Service Menu → Calculation Factors Menu and should be very close to zero. A large offset
may indicate a problem with the instrument (refer to Section 7).

Note: Acoem Australasia encourages regular zero precision checks; however Acoem Australasia
recommends that the zero calibration only be performed when specifically required as it may mask
issues that should be addressed during maintenance/service.

A zero calibration can be performed either through the Calibration Port, Background Air Port or the
Sample Port. Refer to the instructions outlined in the next three sections:

Note: Ensure the instrument has been running for at least one hour before any calibration is
performed to ensure sufficient stability.

5.4.1 Calibration Port

Equipment Required

• Zero Air Source (Refer to Section 1.3 for definition)

Procedure
1. Refer to Figure 115. Ensure a suitable zero air source is connected to the Calibration Port.

Figure 115 – Zero Calibration Set-up - 1

2. Open - Main Menu → Calibration Menu.

3. Select - Cal. Type → Manual - Accept.

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4. Select - Cal. Mode → Zero - Accept.
5. Select - Zero Source → External - Accept.
6. Allow the instrument time to achieve a stable response.
7. Enter - Zero Calibrate SO2 - OK.
8. Select - Cal. Mode → Measure - Accept (To return to sample measure).

5.4.2 Sample Port

Equipment Required

• Zero Air Source (Refer to Section 1.3 for definition)

Procedure
1. Refer to Figure 116. Ensure a suitable zero air source is connected to the Sample Port.

Figure 116 – Zero Calibration Set-up - 2

2. Open - Main Menu → Calibration Menu.

3. Select - Cal. Type → Manual - Accept.
4. Select - Cal. Mode → Measure - Accept.
5. Select - Zero Source → External - Accept.
6. Allow the instrument time to achieve a stable response.
7. Enter - Zero Calibrate SO2 - OK.
8. Disconnect the zero source and reconnect the sample line to the Sample Port.

5.4.3 Background Air Port

Equipment Required

• N/A

Procedure
1. Open - Main Menu → Calibration Menu.

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2. Select - Cal. Type → Manual - Accept.

3. Select - Cal. Mode → Zero - Accept.
4. Select - Zero Source → Internal - Accept.
5. Allow the instrument time to achieve a stable response.
6. Enter - Zero Calibrate SO2 - OK.
7. Select - Cal. Mode → Measure - Accept (To return to sample measure).

5.5 Span Calibration

A span calibration is a calibration performed at the upper end of the instrument’s measurement range.
Acoem Australasia recommends calibration at 80% of the full scale measurement or operating range
of the instrument.

While the instrument range is commonly set as a default 0 - 500 ppb, this is widely recognised as no
longer being valid with modern digital communication and most regulators will now recommend a
range more suited to local conditions.

A span gas can be supplied through either the Calibration Port or Sample Port. Refer to the instructions
outlined in the next two sections.

Note: Ensure that the instrument has been running for at least one hour before any calibration is
performed to ensure the instrument’s stability.

5.5.1 Calibration Port

Equipment Required

• Span Source

Procedure
1. Refer to Figure 117. Ensure a suitable span source is connected to the Calibration Port.

Figure 117 – Span Calibration Set-up - 1

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2. If diluting the gas with a dilution calibrator, set the output concentration to 80% of the instrument
measurement range.
3. Open - Main Menu → Calibration Menu.
4. Select - Cal. Type → Manual - Accept.
5. Select - Cal. Mode → Span - Accept.
6. Let the instrument stabilise, typically 15 minutes.
7. Enter - Span Calibrate SO2 - (Enter the span output concentration) - Accept.
8. Select - Cal. Mode → Measure - Accept (To return to sample measure).

5.5.2 Sample Port

Equipment Required

• Span source

Procedure
1. Refer to Figure 118. Ensure suitable span source is connected to the Sample Port.

Figure 118 – Span Calibration Set-up - 2

2. If diluting the gas with a dilution calibrator, set the output concentration to 80% of the instrument
measurement range.
3. Open - Main Menu → Calibration Menu.
4. Select - Cal. Type → Manual - Accept.
5. Select - Cal. Mode → Measure - Accept.
6. Let the instrument stabilise, typically 15 minutes.
7. Enter - Span Calibrate SO2 - (Enter the span output concentration) - Accept.
8. Disconnect the span source and reconnect the sample line to the Sample Port.

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5.5.3 Manual Instrument Gain and Offset Adjustments

CAUTION
Manual adjustment of the Instrument Gain does not take into account the PTF
correction and can lead to an incorrect calibration.

At times it may be desirable to manually adjust the instrument’s gain and offset. Typically this option
is only used when an instrument calibration has been corrupted and the user wishes to reset the
instrument response factors prior to performing a new calibration.

To manually adjust the instrument follow the below procedure:

Procedure
1. Open - Main Menu → Service Menu → Calculation Factors Menu.
2. Edit - Instrument Gain - (Adjust as required. 1 is the default) - Accept.
3. Edit - Zero Offset SO2 - (Adjust as required. 0 is the default) - Accept.

5.6 Precision Check

Similar to a normal zero or span calibration, a precision check is a Level 2 calibration that may be
performed using a non-certified reference. The instrument is supplied with a known concentration of
span gas (or zero air) and the instrument’s response observed. However, no adjustment to the
instrument response is made during a precision check.

Note: Ensure that the instrument has been running for at least one hour before any calibration is
performed to ensure the sufficient stability.

Equipment Required

• Span source
• Zero source

Procedure
1. Supply the instrument with a zero source (refer to Section 5.4 for the procedure of setting up a
zero, but do not do a Zero Calibrate SO2).
2. Observe and record the measurement from the instrument.
3. Supply the instrument with a span source (refer to Section 5.5 for the procedure of setting up a
span but do not do a Span Calibrate SO2).
4. Observe and record the measurement from the instrument.
5. Check both readings against your local applicable standards.
6. Select - Cal. Mode → Measure - Accept (To return to sample measure).

If an instrument fails a span precision check (based on your local applicable standards), perform a span
calibration (refer to Section 5.5).

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If an instrument fails a zero precision check (based on your local applicable standards), resolve the
issue referring to Section 7 Zero Drift.

5.7 Multipoint Precision Check

A multipoint precision check is used to determine the linear response of the instrument across its
operating range. The instrument is supplied with span gas at multiple known concentrations, typically
a zero point and at least four up-scale points, spread across the operating range of the instrument. The
observed concentrations are compared to expected values and the linearity of the instrument assessed
against local applicable standards.

Note: The instrument is inherently linear and the instrument gain should not be adjusted at each
individual point. Non-linearity indicates a problem with the instrument (refer to Section 7). Ensure
that the instrument has been running for at least one hour before any calibration is performed to
ensure the instrument’s stability.

Several methods for producing multiple known concentrations are available to use, such as connecting
multiple certified bottles at different concentrations. However, Acoem Australasia strongly
recommends the use of a dilution calibrator and a certified cylinder of SO2 at an appropriate
concentration (typically 40 - 100 ppm SO2 balance in Nitrogen).

Procedure
1. Connect your calibration system to the Calibration Port of the instrument (Acoem Australasia
recommends the Serinus Cal 1000 as a minimum, refer to Figure 109).
2. Generate and record the displayed span concentrations for (at least) 5 stepped points (of known
concentrations) evenly spaced across the instrument measurement range (refer to the example
below).
3. Then using a program such as MS Excel, create an X Y scatter plot of expected concentration versus
the recorded instrument response and use linear regression to calculate the line of best fit and the
correlation factor (R2) - refer to the users local applicable standards.
Example for an instrument measurement range of 500 ppb:
a. For the 1st concentration, set the gas dilution calibrator to supply 400 ppb SO2 gas to the
instrument.
b. Allow the instrument to sample the calibration gas until a prolonged stable response is
achieved (the amount of time this takes is impacted by the calibration setup) and record the
instrument response.
c. Repeat the above steps using concentrations of 300 ppb, 200 ppb, 100 ppb and a Zero point.
d. Graph the results and use linear regression to determine a pass or fail as per applicable local
standards.
𝑦 = 𝑚𝑥 + 𝑐

Note: To highlight hysteresis errors, it is advisable to run the multipoint check in both descending
and ascending order - refer to applicable local standards.

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 Ser in u s ® 50 U ser M an u al 3 .3

Figure 119 – Excel Graph of Multipoint Calibration

4. The following is a guide to approximate expected good results:

a. The gradient (m) falls between 0.98 and 1.02.
b. The intercept (b) lies between -2 and +2.
c. The correlation (R2) is greater than 0.99.
5. If unsatisfactory results are observed refer to Section 7 - Troubleshooting.

5.8 Flow Calibration (Internal Pump Option Only)

This procedure calibrates the rate of the flow generated by the internal pump. The following procedure
must be performed:

 After a service or repair.

 When the external flow check has found the flow to be outside normal range.
 When a new pump has been installed.
 When the instrument is reset to factory defaults.

Equipment Required

• Calibrated Flow Meter

Procedure
1. Disconnect any external tubing connected to the rear ports of the instrument (Sample Port,
Exhaust Port, etc.).
2. Open - Main Menu → Calibration Menu → Flow Calibration Menu.

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3. Select - Pump Control → MANUAL - Accept.

Note: This action will set the Pump Control to Manual and place the valve sequencing on hold;
normal sampling will be interrupted.

4. OFF - Internal Pump → Off.

5. Wait for the Sample Flow to become stable around 0.0 slpm (± 0.01 slpm).
6. Set - Cal. Zero - Yes (Calibration of your zero point).
7. Connect a calibrated flow meter to the Sample Port.
8. ON - Internal Pump → On.
9. Edit the Coarse and Fine pots until the calibrated flow meter reads the desired instrument Sample
Flow rate (Set Point).

Note: Edit the Fine pot to 253 then edit the Coarse to be as close as possible to desired reading
and use Fine pot to make it exact.

10. Edit - Cal. Point - (Enter the reading from the flow meter) - Accept.
11. Select - Pump Control → START - Accept.
12. Leave for up to five minutes to return to normal operation. If instrument doesn’t return to normal
there may be a blockage (refer to Section 7).
13. Remove flow meter and reconnect external tubbing.
14. Back - Flow Calibration Menu - (read note) - OK.

5.9 High Pressure Zero/Span Valve (Option)

If the instrument was ordered with this option, the internal pressurised calibration valves will already
be installed within the instrument as either a zero or span calibration source, thus no other internal
connections need to be made.

Note: Before using a high pressure span or zero as a source for calibrating the instrument, check
the local regulatory requirements. This is generally only be used as an operational check of the
instrument’s zero point and single span point (recommended as 80% of full scale).

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5.9.1 Single Pressurised Calibration Option

Set-Up of Single Calibration Option

Figure 120 – Single High Pressure Calibration Option

When using the pressurised calibration option, either a high pressure zero or span cylinder (depending
on the option ordered) should be connected to the Calibration Port.

Equipment Required

• Calibrated Flow Meter

• Gas Cylinder and Accessories

Procedure
1. Ensure the gas cylinder is fitted with an appropriate gas regulator with a shut off valve.
2. Connect a 1/4” line of stainless steel tubing between the gas cylinder and the instruments
Calibration port.
Note: This connection may need to be retightened during this operation.

3. Open the cylinder main valve and adjust the regulator to 15 psig.
4. Open the regulator’s shut off valve and test for leaks:
a. Pressurise the line.
b. Close the cylinder main valve.
c. If pressure drops by more than 2 PSI over five minutes, check the connections and retest.
d. Open cylinder main valve.

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5. Temporarily place a flow meter on the Vent Port.
6. Open - Main Menu → Calibration Menu.
7. Select - Cal. Type → Manual - Accept.
8. Select - Cal. Mode → Span or Zero - Accept (Depending on the option installed).
Note: When using the high pressure zero option, ensure Zero Source is set to External.

9. Adjust the regulator pressure until the flow meter on the Vent Port is between 0.5 and 1 slpm. This
is the excess calibration gas flow rate.
Note: Do not exceed a pressure of 2 bars, this can damage the instrument and cause gas leakage.

Return to Normal Operation

1. Select - Cal. Mode → Measure - Accept. (To return to sample measure).
2. Remove the flow meter on the Vent Port and connect a vent line.
3. Reconnect the instrument fittings and return to the original set-up.

The instrument is now in normal operation mode. When either zero or span calibration is initiated
(depending on which option has been installed) the instrument will automatically open the valves to
run a pressurised calibration.

5.9.2 Dual Pressurised Calibration Option

Set-Up of Dual Calibration Option

Figure 121 – Dual High Pressure Calibration Option

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When using the dual pressurised calibration option, a high pressure zero cylinder should be connected
to the Pres In Port and a high pressure span cylinder connected to the Calibration port.

Equipment Required

• Calibrated Flow Meter

• Gas Cylinder of Zero air and Accessories
• Gas Cylinder of SO2 and Accessories

Procedure
1. Ensure the gas cylinder is fitted with an appropriate gas regulator with a shut off valve.
2. Connect a 1/4” line of stainless steel tubing between the appropriate gas cylinders and the
instrument’s Pres In Port and Calibration port.

Note: This connection may need to be retightened during this operation.

3. Open the cylinder main valve and adjust the regulator to 15 psig.
4. Open the regulator’s shutoff valve and test for leaks:
a. Pressurise the line.
b. Close the cylinder main valve.
c. If pressure drops by more than 2 PSI over five minutes, check the connections and retest.
d. Open cylinder main valve.
5. Temporarily place a flow meter on the Vent port (This port is now used as the high pressure
calibration vent for both span and zero).
6. Open - Main Menu → Calibration Menu.
7. Select - Cal. Type → Manual - Accept.
8. Select - Cal. Mode → Zero - Accept.

Note: When using the high pressure zero option, ensure Zero Source is set to External.

9. Adjust the regulator pressure until the flow meter on the vent line (Vent) is between 0.5 and 1
slpm. This is the excess calibration gas flow rate.

Note: Do not exceed a pressure of two bars, this can damage the instrument and cause gas
leakage.

10. Select - Cal. Mode → Span - Accept.

11. Adjust the regulator pressure until the flow meter on the vent line (Vent) is between 0.5 and 1
slpm. This is the excess calibration gas flow rate.

Note: Do not exceed a pressure of two bars, this can damage the instrument and cause gas
leakage.

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Return to Normal Operation
1. Select - Cal. Mode → Measure - Accept. (To return to sample measure).
2. Remove the flow meter on the Vent port and connect a vent line.
3. Reconnect the instrument fittings and return to the original set-up.

The instrument is now in normal operation mode. When either zero or span calibration is initiated the
instrument will automatically open the valves to run a pressurised calibration.

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6. Service
6.1 Additional Safety Requirements for Service Personnel

In addition to Safety Information stated previously, service personnel are also advised of the following:

• Documentation must be consulted in all cases where caution symbol is marked, in order to
find out the nature of the potential hazards and any actions which have to be taken to avoid
them. Refer to Table 1 – Internationally Recognised Symbols.
• Do not energise the instrument until all conductive cleaning liquids, used on internal
components, are dried up
• Do not replace the detachable mains supply cord with an inadequately rated cord. Any mains
supply cord that is used with the instrument must comply with the safety requirements
(250 V/10 A minimum requirement).

6.2 Maintenance Tools

To perform general maintenance on the Serinus 50 the user may require the following equipment:

 Customizable Test Equipment Case PN: H070301

 Digital Multimeter & Leads (DMM) PN: E031081 & E031082
 Barometer PN: E031080
 Thermometer & Probe PN: E031078 & E031079
 Flow Meter (Select Range)
Range: 50 - 5000 sccm PN: ZBI-200-220M
 Minifit Extraction Tool PN: T030001
 Orifice/Sintered Filter Extraction Tool PN: H010046
 Leak Test Jig PN: H050069
 Computer/Laptop and Connection Cable for Diagnostic Tests
 1.5 mm Hex Key
 Assortment of 1/4” and 1/8” Tubing and Fittings
 Zero Air Source
 Span Gas Source
 General Hand Tools

Figure 122 – Minifit Extraction Tool - (PN: T030001)

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 Ser in u s ® 50 U ser M an u al 3 .3

Figure 123 – Orifice/Sintered Filter Removal Tool - (PN: H010046)

Figure 124 – Leak Test Jig - (PN: H050069)

Figure 125 – Air Monitoring Test Equipment Kit (AMTEK) - Customisable

6.3 Maintenance Schedule

The maintenance intervals are determined by compliance standards that differ in various regions. The
following is recommended by Acoem Australasia as a guide. Compliance with local regulatory or
international standards is the responsibility of the user.

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Table 7 – Maintenance Schedule

Interval * Task Performed Section

Nightly Perform precision check (Automated) 5.6
or Perform precision check (Manual)
Every 5 days (This task is performed to ensure a high data capture rate)
Monthly Perform precision check (pre-check) prior to commencing any 5.6
service tasks or making any changes to the system as found in its
current state. This task is necessary to validate any previously
captured data.
Check particulate filter, replace if full/dirty 6.4.1
Perform a pressure check 6.4.10
Check sample inlet system for moisture or foreign materials. Clean
if necessary
Check fan filter and clean if necessary 6.4.2
Check event log 3.4.1
Check date and time is correct 3.4.8
Check instrument status light 3.3.1
External vacuum pump check (vacuum source)
leak check 6.4.4
Perform SO2 span calibration 5.5
Perform precision check (post-check) once all service tasks have 5.6
been completed. This task is necessary to establish a valid start
point to begin capturing new data.
6 Monthly Replace the PMT Desiccant Packs 6.4.5
Perform multipoint precision check 5.7
Calibrate analog outputs (only if used) 3.4.26
Check the zero air scrubbers, replace if saturated 6.4.6
Check the UV lamp alignment, replace if necessary 6.4.8
Yearly Replace DFU 6.4.3
Replace sintered filter and orifice (only if necessary) 6.4.7 & 9.11

* Suggested intervals for maintenance procedure are a guide only and may vary with sampling intensity and/or
environmental conditions. Refer to your local regulatory standard for your personalised maintenance schedule.

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6.4 Maintenance Procedures

6.4.1 Particulate Filter Replacement

Contamination of the 5-micron filter can result in degraded performance of the instrument, including
slow response time, erroneous readings, temperature drift and various other problems. The frequency
which the filter needs to be replaced is heavily dependent on the environmental conditions the
instrument is sampling.

Procedure
1. Turn OFF the external pump and allow the instrument to return to ambient.
2. Open the lid of the instrument to access the sample filter holder (located in front right-hand
corner).
3. Refer to Figure 126. Loosen the compression nut and pull-out the tube from the fitting.

Figure 126 – Remove Tubing

4. Refer to Figure 127. Remove the retaining ring by turning it counter-clockwise.

Figure 127 – Remove Retaining Ring

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5. Refer to Figure 128. Remove the sample filter holder sealing cap.

Figure 128 – Remove Filter Sealing Cap

6. Refer to Figure 129. Remove the old particulate filter.

Figure 129 – Particulate Filter

7. If the inner surface of the sample filter components are dirty, then clean with damp lint free paper
towel.
8. Place a new particulate filter paper into the body of the sample filter holder.
Note: Make sure filter body is completely dry before placing the new filter.

Note: Avoid to touch Particulate filter paper by hand use blue paper to place the filter into filter
body.

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Figure 130 – Avoid to Touching Particulate Filter Paper

9. Replace the sample filter holder sealing cap and re-assembly the retaining ring by turning it
clockwise.
Note: Make sure O-ring and particulate filter paper are installed correctly

Note: Make sure that Elbow Fitting is in the right direction, refer to Figure 131.

Figure 131 – Elbow Fitting Direction

10. Refer to Figure 132. Reconnect the compression nut and tubing to the elbow fitting.

Figure 132 – Reconnect the Compression Nut and Tubing

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11. Close the lid of the instrument and perform a leak check (refer to Section 6.4.4).

6.4.2 Clean Chassis Fan Filter

The chassis fan filter is located on the rear of the instrument. If this filter becomes contaminated with
dust and dirt it may affect the cooling capacity of the instrument.

CAUTION
Do not insert a rod or finger into the cooling fans, otherwise injury may result.

Procedure
1. Refer to Figure 133. Remove outer filter casing and filter.

Figure 133 – Remove Filter Casing and Filter

2. Clean filter with water and dry it.

Note: Do not install the filter until completely dry, a wet filter can damage the instrument.

3. Reinstall filter and filter casing.

6.4.3 DFU Replacement

Equipment Required

• 5/8” Spanner

Procedure
1. Turn OFF the external pump and allow the instrument to return to ambient.
2. Remove the Kynar nuts from both ends of the DFU by turning them counter-clockwise.

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3. Remove and replace the DFU (refer to Figure 134 left hand side of the DFU in the image should
connect to the fitting at the bottom of the zero air scrubber).

Figure 134 – DFU

4. Tighten the Kynar nut clockwise.

6.4.4 Leak Check

Equipment Required

• Source of Vacuum (Pump)

• Leak Test Jig (PN: H050069)
• Kynar 1/4” Blocker Nuts
• Tubing and Assorted Fittings
• 5/8” Spanner
• 9/16” Spanner
• 7/16” Spanner

Procedure

Note: Ensure that the instrument has been running for at least one hour before this procedure is
performed.

1. Turn OFF the vacuum source and allow the instrument to return to ambient pressure.
2. Disconnect all external tubing connected to the rear ports of the instrument.
3. Refer to Figure 135. Connect a leak check jig to the Exhaust Port of the instrument.

Figure 135 – Leak Test Jig on Exhaust Port

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4. Refer to Figure 136. Connect a vacuum source to the shut off valve ensuring the shut off valve is in
the open position.

Figure 136 – Connect Vacuum Source

5. Refer to Figure 137. Block the instrument’s BGnd Air Port with Kynar 1/4” blocker nut.

Figure 137 – Blocker BGnd Air Port

6. Open - Main Menu → Service Menu → Diagnostics Menu → Valve Menu.

7. Disable - Valve Sequencing → Disabled.
8. On - Sample/Cal → On
9. Off - Internal Zero/Cal → Off.
10. Off - Pressurized Zero (OPT) → Off.
11. Off - Pressurized Span (OPT) → Off.
12. Allow the instrument time to evacuate the pneumatic system (the time required will depend on
the vacuum source used).
13. Close the shut off valve and record the vacuum indicated on the leak test jig. Wait for three minutes
and observe the gauge on the leak test jig. It should not drop more than 5 kpa
(37.5 torr). If the leak check passed skip to step 17.

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14. Inspect the instrument’s plumbing looking for obvious damage. Check the condition of fittings,
sample filter holder plus the O-rings both in the filter assembly and in the reaction cell assembly.
15. When the location of the leak has been determined, repair and re-run the leak check procedure.
16. If the leak is still present divide up the pneumatic system into discrete sections to locate the leak
(refer to Section 9.5). When the location of the leak has been determined repair and then re-run
the leak check procedure.
17. Slowly remove the blocker nut on the BGnd Air Port.
18. Allow the gauge to return to ambient. Inspect the internal tubing to ensuring that the tubing is
cleanly connected to the fittings.
19. Remove the leak check jig.
20. Open - Main Menu → Service Menu → Diagnostics Menu → Valve Menu.
21. Enable - Valve Sequencing → Enabled.
Note: In this leak check procedure we have not checked the Sample and Calibration line.

6.4.4.1 Leak Check (Internal Pump Option)

Equipment Required

• Barometer
• Kynar 1/4” Blocker Nuts
• 5/8” Spanner
• 9/16” Spanner
• 7/16” Spanner

Procedure

Note: Ensure that the instrument has been running for at least one hour before this procedure is
performed.

1. Disconnect all external tubing connected to the rear ports of the instrument.
2. Open - Main Menu → Service Menu → Diagnostics Menu → Internal Pump Menu.
3. Select - Pump Control → Manual - Accept.
4. Edit - Coarse - (set to 240) - Accept.
5. Edit - Fine - (set to 255) - Accept.
6. Open - Main Menu → Service Menu → Diagnostics Menu → Valve Menu.
7. Disable - Valve Sequencing → Disabled.
8. Off - Sample/Cal → Off.
9. Off - Internal Zero/Cal → Off.
10. Off - Pressurized Zero (OPT) → Off.
11. Off - Pressurized Span (OPT) → Off.

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12. Refer to Figure 138. Locate the bypass DFU inside the chassis, between the PMT fan assembly and
the dump, and block the DFU inlet.

Figure 138 – Bypass DFU

13. Connect the barometer to Sample Port.

14. Allow the internal pump to time to evacuate the pneumatic system (the time required will depend
on the condition of the pump 1 - 2 minutes).
15. Turn the manual stop valve 90° (Close).
16. Open - Main Menu → Service Menu → Diagnostics Menu → Internal Pump Menu.
17. Toggle Off - Internal Pump → Off.
18. Note the value on the barometer. Wait for three minutes, the value should not increase more than
5 kpa (37.5 torr). If the leak check passed skip to step 22.
19. Inspect the instrument’s plumbing looking for obvious damage. Check the condition of fittings,
sample filter holder plus the O-rings both in the filter assembly and in the reaction cell assembly.
20. When the location of the leak has been determined, repair and re-run the leak check procedure.
21. If the leak is still present divide up the pneumatic system into discrete sections to locate the leak
(refer to Section 9.6). When the location of the leak has been determined repair and then rerun
the leak check procedure.
22. Slowly remove the barometer from the Sample Port and allow the instrument to return to
ambient.
23. Remove the blocker from the bypass DFU.
24. Turn the manual stop valve 90° (Open).
25. Open - Main Menu → Service Menu → Diagnostics Menu → Valve Menu.
26. Enable - Valve Sequencing → Enabled.
27. Open - Main Menu → Service Menu → Diagnostics Menu → Internal Pump Menu.
28. Select - Pump Control → START - Accept.
Note: In this leak check procedure we have not checked the BGnd Air and Calibration line.

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6.4.5 Replacing the PMT Desiccant Packs

The PMT housing contains two desiccant packs to prevent condensation on the PMT cold block. If the
desiccant expires it will result in premature cooler failure. It is recommended that the desiccant bags
be changed at least annually. If moisture is detected inside the housing or the desiccant packs are
saturated the interval should be reduced. To change the desiccant packs follow the instructions below:

CAUTION
Because the PMT is extremely sensitive to light, it is essential that before
opening the PMT assembly to make sure that the instrument is switched OFF.
In addition, even when the instrument is switched OFF it is very important to
cover the PMT at all times so that no direct light reaches its window.

Equipment Required

• Phillips Head Screwdriver

• New Desiccant Packs
• Tweezers

Procedure
1. Turn the instrument OFF and disconnect the power. Wait 15 min for the cold block to warm up.
Note: The amount of time required for the cold block to warm up will need to be increased in
humid environments as the dew point will be at a higher temperature. Check and take into
consideration your local dew point before proceeding.

2. Refer to Figure 139. Using an Phillips head screwdriver, remove the desiccant pack access cap from
the PMT housing.

Figure 139 – Remove Desiccant Access Cap

3. Remove the old desiccant packs and replace with new ones. Do not attempt to dry and reuse the
old packs.
4. Inspect the inside of the PMT housing (by touch or with an inspection mirror) to check for moisture
inside the housing. If moisture is detected inside the housing or the desiccant packs are saturated,
the desiccant packs should be replaced more frequently.

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5. Reinstall the desiccant cap by gently twisting and pressing the cap back into the PMT housing. It
may help to apply a small amount of lubricant to the O-ring on the desiccant cap. Secure with two
screws.
CAUTION
Do not attempt to use the fastening screws to push the desiccant cap in place in
the PMT housing. This will damage the O-ring.

6. Reconnect power and restart the instrument.

Note: Removal of the desiccant access cap may be easier if the Rx cell/PMT housing is removed
from the instrument.

6.4.6 Replace Zero Air Scrubber

Equipment Required

• Flat Screwdriver

Procedure
1. Turn OFF the external pump and allow the instrument to return to ambient.
2. Open the lid of the instrument.
3. Refer to Figure 140. Loosen the compression nut and remove the tubing from the fitting on top of
the scrubber.

Figure 140 – Remove the Tubing

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4. Refer to Figure 141. Remove the Kynar nut and pull-out the DFU from the fitting below the
scrubber.

Figure 141 – Pull-out the DFU

5. Refer to Figure 142. Open the scrubber holder with a screwdriver.

Figure 142 – Zero Scrubber Removal

6. Replace the zero air scrubber.

7. Perform a leak check (refer to Section 6.4.4).
8. Perform a manual background (refer to Section 5.3).
9. Perform a zero and span calibration (refer to Section 5.4 and Section 5.5).

Table 8 – Zero Air Scrubber Replacement Frequency

Average SO2 Concentration Charcoal Replacement Frequency

0 - 30 ppb 12 Months
30 - 100 ppb 6 Months
> 100 ppb 1 Month

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6.4.7 Orifice Replacement

Equipment Required

• Orifice Removal Tool (PN: H010046)

• Teflon Tape
• 5/8” Spanner

Procedure
1. Turn OFF the external pump and allow the instrument to return to ambient.
2. Turn OFF the instrument and disconnect the pump.
3. Refer to Figure 143. Disconnect the tubing from the tee fitting on top of the dump of the reaction
cell. Disconnect the tubing from the dump tee fitting on top of the dump.

Figure 143 – Reaction Cell Tee Fitting

4. Remove the Kynar nuts to access the tee fitting.

5. Remove the tee fitting from the dump by turning it counter-clockwise.
6. Remove both the orifice by screwing in the orifice removal tool (finer thread end) clockwise, then
gently pull the orifice out of the tee fitting.
7. The orifices may be exchanged with new ones or cleaned as needed.
8. Refer to Figure 144. Replace the orifice(s) in the correct part of the Tee fitting (#12 in the bottom
of the tee fitting and #20 in the side).
Note: The orifice number is stamped on the base of the orifice.

Note: Do not insert the Orifice too far into the fitting (i.e. not past the top thread of the Kynar
fitting).

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Figure 144 – Orifice Location

9. Apply Teflon tape to the thread of the tee fitting and replace it in the dump by turning it clockwise.
10. Replace the Kynar nuts to each end of the tee fitting.
11. Power up the instrument and allow it to complete the warm-up sequence.
12. Perform a leak test (refer to Section 6.4.4).
13. Reconnect the external pump and perform a flow check.
14. Perform a manual background (refer to Section 5.3).
15. Perform zero and span calibrations (refer to Section 5.4 and Section 5.5).

6.4.8 UV Lamp Replacement

Proper operation of the UV lamp is essential to the Serinus 50. The UV lamp should be checked every
six months to ensure it is operating within acceptable parameters and may require realignment or
replacement to maintain sufficient UV light for instrument operation. The UV lamp will need to be
adjusted only when the Ref. Gain Pot goes above 100 or below 5. Following are procedures to check
align and replace the UV lamp assembly.
CAUTION
Acoem Australasia recommends the use of UV protective glasses when adjusting
the UV lamp.

CAUTION
The Lamp Driver PCA can generate in excess of 1000 volts. Exercise extreme care
when working in the vicinity of the Lamp Driver.

CAUTION
If the UV lamp is adjusted, the instrument will require recalibration.

Equipment Required

• UV Protective Glasses

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Procedure
1. Turn OFF the external pump and allow the instrument to return to ambient.
2. Refer to Figure 145. Loosen the collets at each end of the lamp.

Figure 145 – Collets of the UV Lamp

3. Pull-out the UV lamp and carefully replace it with the new UV lamp.
4. Align the UV lamp, refer to Section 6.4.8.1.

6.4.8.1 UV Lamp Alignment

CAUTION
Acoem Australasia recommends the use of UV protective glasses when adjusting
the UV lamp.

CAUTION
The Lamp Driver PCA can generate in excess of 1000 volts. Exercise extreme care
when working in the vicinity of the Lamp Driver.

CAUTION
If the UV lamp is adjusted, the instrument will require recalibration.

Equipment Required

• Oscilloscope
• UV Protective Glasses

Procedure
1. Turn the instrument ON and allow the UV lamp to warm-up and stabilise (about 30 minutes).
2. Refer to Figure 146. Connect an oscilloscope to TP19 (SO2REFX2) and TP1 (AGND) on top of the
main controller PCA.

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Figure 146 – Connect Oscilloscope

3. Adjust the oscilloscope for 0.5 V/division and 20 msec/division.

4. Refer to Figure 147. Loosen the collets (do not remove) at each end of the lamp.

Figure 147 – Collets of the UV Lamp

CAUTION
The UV lamp can be damaged if an adjustment is attempted without loosening
the collets.

5. Physically adjust the UV lamp (rotate and move left and right) until the maximum peak voltage on
the oscilloscope is obtained. The minimum usable output from the lamp is approximately 0.8 volts
amplitude (peak to peak). If the UV lamp output is below 1.0 volts, replacement should be
considered.
6. Tighten the UV lamp collets and verify the UV lamp has remained at its previously adjusted
position.
7. Reset the instrument and allow it to run a warm-up sequence.
8. Perform zero and span calibrations (refer to Section 5.4 and Section 5.5).

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6.4.9 Clean Pneumatics
The calibration valve manifold will require disassembling and cleaning. Ideally the valves and the
manifold should be cleaned in a sonic bath with lab detergent and water. Once clean, rinse with
distilled water and dry with clean dry oil free air before reassembling (refer to Section 9.16 and Section
9.18). A leak test should be performed once the instrument is ready for operation (refer to Section
6.4.4).

If the tubing shows signs of significant contamination, it should be replaced with new tubing (refer to
Section 9.3 for tubing part number and Section 9.5 for tubing lengths).

6.4.10 Pressure Sensor Check

Pressure checks are needed to ensure that the pressure sensor is accurately measuring pressure inside
the instrument.

During normal operation ensure that the Pressure & Flow Menu indicate the following parameters.
Ambient should display the current ambient pressure at site. Cell should indicate current cell pressure.
Depending on the pump condition and location, a value of between 30 - 40 torr below ambient
pressure is recommended.

Equipment Required

• Barometer
• Digital Multimeter (DMM)

Procedure
1. Open - Main Menu → Analyser State Menu → Pressure & Flow Menu.
2. Turn OFF the vacuum pump and allow the instrument to return to ambient.
3. Disconnect all external tubing connected to the rear ports of the instrument.
4. After two - five minutes observe the pressure readings: ambient and cell. Ensure that they are
reading the same ± 3 torr (± 0.4 kPa).
5. If the readings are outside this level, perform a pressure calibration (refer to Section 5.2.2).

If the calibration fails the instrument may have a hardware fault. The cell pressure PCA has test points.
To determine if the pressure sensor is faulty simply measure the voltage on the test points, refer to
Figure 148 and Figure 149. The voltage measured across the test point is proportional to the pressure
measured by the sensor so if the sensor is exposed to ambient pressure at sea level the voltage will be
around 4 volts but if the sensor is under vacuum the voltage will be low (e.g. 0.5 volts). If the test point
measures zero or negative voltage the assembly is most likely faulty and will need to be replaced.

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 Ser in u s ® 50 U ser M an u al 3 .3

Figure 148 – Test Point Location

Figure 149 – Typical Test Point Reading of Cell Pressure Sensor

6.5 Bootloader

The Serinus Bootloader is the initial set of operations that the instruments’ microprocessor performs
when first powered up (similar to the BIOS found in a personal computer). This occurs every time the
instrument is powered up or during instrument resets. Once the instrument boots up, it will
automatically load the instruments’ firmware. A service technician may need to enter the Bootloader
to perform advanced microprocessor functions as described below.

To enter the Bootloader turn OFF the power to the instrument. Press and hold the plus key while
turning the power ON. Hold the Plus key until the following screen appears.

Gas Analyser / Calibrator

V3.4.0 Bootloader
Press ‘1’ to enter Bootloader

If the instrument displays the normal start up screen, the power will need to be toggled and another
attempt will need to be made to enter the Bootloader. Once successful, press 1 to enter the
Bootloader Menu.

6.5.1 Display Help Screen

Once in the Bootloader screen it is possible to redisplay the help screen by pressing 1 on the keypad.

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6.5.2 Communications Port Test
This test is very useful for fault finding communication issues. It allows a communication test to be
carried out independent to any user settings or firmware revisions.

This command forces the following communication ports to output a string of characters: Serial Port
RS232 #1, USB rear and Ethernet Port. The default baud rate is 38400 for the RS232 Serial Port. To
initiate the test press the number 2 key from the Bootloader screen.

6.5.3 Updating Firmware

It is important for optimal performance of the instrument that the latest firmware is loaded. The latest
firmware can be obtained by visiting Acoem Australasia’s website:

http://www.ecotech.com/downloads/firmware

Or by emailing Acoem Australasia at service@ecotech.com or support@ecotech.com.

To update the firmware from a USB memory stick, use the following procedure:

Procedure
1. Turn the instrument OFF.
2. Place the USB memory stick with the new firmware (ensure that firmware is placed in a folder
called FIRMWARE) in the front panel USB Port.
3. Enter the Bootloader (refer to Section 6.5).
4. Select option 3 (upgrade from USB memory stick), press 3 on the keypad.
5. Wait until the upgrade has completed.
6. Press 9 on the keypad to start the instrument with new firmware.

6.5.4 Erase All Settings

This command is only required if the instrument’s firmware has become unstable due to corrupted
settings. To execute this command enter the Bootloader Menu (refer to Section 6.5) and press 4 on
the keypad.

6.5.5 Start Analyser

The start analyser command will simply initiate a firmware load by pressing 9 on the keypad from the
Bootloader Menu. It is generally used after a firmware upgrade.

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 Ser in u s ® 50 U ser M an u al 3 .3

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Page 166
7. Troubleshooting
Before troubleshooting any specific issues, Acoem Australasia recommends ensuring the instrument
has successfully completed its warm-up routine and resolving all issues listed in the instrument status
menu (refer to Section 3.4.4).

Table 9 – Common Errors and Troubleshooting

Error Message/Problem Cause Solution

Flow fault Multiple possibilities Refer to Section 7.1.
Pump failed Replace the internal or external pump.
Blocked filter or orifice Replace particulate filter or orifice
(refer to Section 6.4.1 or 6.4.7).
Pressurised reaction cell Ensure sample and zero inlets are maintained at
ambient pressure. Ensure that the vacuum
pump is connected correctly.
Pressure sensors Check pressure voltages displayed in pressure
calibration menu both the ambient and cell
voltage should equal 4 volts ± 0.5 (at sea level).
Perform a pressure calibration
(refer to Section 5.2).
Noisy/unstable readings Multiple possibilities Refer to Section 7.2.
Calibration system error Ensure calibration system is functioning
correctly and is leak free.
Ensure sufficient gas is available for instrument
and an adequate vent is available for excess gas.
Leaks A leak in the instrument or calibration system
dilutes the sample stream and causes low span
readings and noise.
Lamp not correctly Adjust the UV lamp. If you are unable to obtain
positioned an acceptable reading, replace the lamp (refer
to Section 6.4.8).
TE cooler or Reaction cell A failed temperature control allows the
heater instrument to drift with ambient temperature.
Verify that the cell temperature is 50 °C ± 3 and
that the TE cooler is 13 °C ± 2.
Hardware fault Faulty measurement cell component.
Gain too high Leak check
(repair any leaks refer to Section 6.4.4).
UV lamp filter in reaction cell deteriorated -
replace.
PMT voltage too low less than 700 V.
UV lamp requires replacing
(refer to Section 6.4.8).

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 Ser in u s ® 50 U ser M an u al 3 .3

PMT temperature too high Check PMT fan is operating.

(> 15 °C) Check chassis temperature is < 48 °C.
Check PMT cooler is operational and correct
amount of thermal paste is applied.
Reference gain digital Check value in menu (refer to Section 3.4.15).
potentiometer out of If out of normal range, replace UV lamp and/or
normal range UV lamp filter.
Electronic zero adjust Faulty zero air or Refer to Section 7.3.
contaminated
cell/pneumatics
Cell temperature failure Faulty heater or Refer to Section 7.4.
temperature sensor
Instrument resetting Multiple possibilities Check that the instrument is not overheating.
Possibly a faulty power supply.
Electrical issue component shorted to ground.
Corrupted firmware, perform an ‘Erases all
settings’ in the Bootloader Menu and reload or
upgrades firmware (refer to Section 6.5.4).
12 Voltage supply failure Power supply has failed Replace power supply.
No display AC power Verify that the mains power cable is connected
and the rear power supply fan is operating.
Contrast misadjusted Adjust the display contrast by pressing one of
two keys on the front panel:
Press Up arrow () for darker contrast
Press Down arrow () for lighter contrast
Note: Must be in the home screen
DC power Verify that the power supply is providing the
correct DC voltages: +12 V (TP34), -12 V (TP23)
& +5 V (TP39) DC.
Display Check the interface cable between the display
and the main controller PCA (J16)
Bad display or Main Replace the front panel display
controller PCA Replace the main controller PCA.
Bad cables are unlikely, but if you suspect it,
perform a pin-for-pin continuity test using an
ohmmeter.
Sample pressure Loss of pressure calibration Perform a pressure calibration
too high or low (refer to Section 5.2).
Ensure particulate filter has been recently
changed. Ensure tubing is not kinked or blocked.
Ensure vacuum pump is correctly installed and
operating.
Sample flow not equal to Multiple possibilities Check/replace sample filter.
0.75 slpm (External Check pump.
pump model)

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 Check valves.
Check/replace orifice.
Re-calibrate pressure sensors.
Unstable flow or Faulty pressure sensors Check pressure transducer calibration. Check
pressure readings calibration valve assembly is functioning and
not blocked. If unable to diagnose problem,
check voltage across TP1 and TP2 of pressure
PCA ensure it is about 3.5 volts ± 0.3 volts.
If unable to diagnose problem, it may be a noisy
A/D converter, replace main controller PCA.
Low span Leaks A leak in the instrument or calibration system
dilutes the sample stream and causes low span
readings and noise.
Span calibration out Adjust the span using the calibration procedure
(refer to Section 5.5).
Faulty lamp Replace UV lamp (refer to Section 6.4.8).
No response to span gas Leaks/blockages Leak or blockages in tubes or valves. Perform
leak check and flow check and repair any
leaks/blockages.
Faulty calibration source Ensure calibration gas is plumbed correctly, is
not contaminated, has no leaks and is a certified
reference gas.
Zero drift Poor temperature control Ensure instrument is operated in a temperature
controlled environment with the lid on.
Charcoal contaminated Replace the charcoal in the scrubber feeding the
background port.
Faulty zero air Ensure zero air sources have been maintained.
Leak Perform leak test.
Negative response Internal scrubber Charcoal scrubber contaminated. Replace
charcoal and preform a leak check (refer to
Section 6.4.4).
Input pot limited to 0 or Damaged lamp Check that lamp current is 35 mA. If it is not 35
255 mA replace the Lamp driver PCA. If the pot is
still 255, replace UV lamp.

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 Ser in u s ® 50 U ser M an u al 3 .3

7.1 Flow Fault

Figure 150 – Flow Fault Diagnostic Procedure

** Section 2.3.2

*** Section 5.2

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7.2 Noisy/Unstable Readings

Figure 151 – Noisy or Unstable Zero or Span Results

** Section 6.4.4

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 Ser in u s ® 50 U ser M an u al 3 .3

7.3 Electronic Zero Adjust

Figure 152 – Troubleshooting, Electronic Zero Adjust

** Section 9.4 - Instrument Parts List

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7.4 Reaction Cell Temperature Failure
Note: This process assumes that the temperature set point is 50 °C.

Figure 153 – Troubleshooting, Reaction Cell Temperature Failure

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 Ser in u s ® 50 U ser M an u al 3 .3

7.5 USB Memory Stick Failure

Figure 154 – USB Memory Stick Failure

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7.6 Technical Support Files

Regular backup of the settings, parameters and data on the instruments USB memory stick is
recommended.

In the event of a fault that requires Acoem Australasia technical support, make copies of the following
files and email to: support@ecotech.com

Equipment Required

• PC/Laptop

Procedure
State the ID number, model, board revision and firmware version of the instrument with a brief
description of the problem. Take a copy of the current configuration if possible and a save of the
parameters.

1. Open - Main Menu → Analyser State Menu.

2. Model - (take note).
3. Ecotech ID - (take note).
4. Board Revision - (take note).
5. Firmware Ver. - (take note).
6. Open - Main Menu → Service Menu.
7. Save - Save Configuration - (CONFIG**.TXT) - Accept.

Note: CONFIG99.TXT is the “Factory Backup” file, this is the configuration of the instrument as it
left the factory. It is recommended that this file is kept unchanged but can be used as a reference
backup point.
** Can be any number from 0 - 98.

8. Save - Save Parameter List - (PARAM**.TXT) - Accept.

9. Eject - Safely Remove USB Stick - (Follow instructions).

Note: PARAM99.TXT is the “Factory Backup” file, This is a snap shot of the parameters while it was
under test in the factory just prior to release. It is recommended that this file is kept unchanged
but can be viewed for reference.
** Can be any number from 0 - 98.

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 Ser in u s ® 50 U ser M an u al 3 .3

Figure 155 – USB Memory Stick File Structure

10. Insert the USB memory stick into PC/Laptop computer and access the files.
11. Best practice is to email all the on the USB memory stick but if it’s to large just send:
12. The CONFIG**.TXT and PARAM**.TXT files that are saved in the CONFIG folder.
13. The LOG files (Event Log text files) and data files (14=Year, Sub folder=month).
14. Safely Eject the USB from the PC/Laptop and return to the instrument.

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8. Optional Extras
This section contains information on optional kits and installed options.

Dual Sample Filter Refer to Section 8.1.

Test Lamp Refer to Section 8.2.
Network Port Refer to Section 8.3.
Rack Mount Kit Refer to Section 8.4.
Internal Pump Refer to Section 8.5.
Metric Fittings Kit Refer to Section 8.6.
Internal Zero and Span Refer to Section 8.7.
High Pressure Zero/Span Valves Refer to Section 8.8.
Trace Level Instrument Refer to Section 8.9.

8.1 Dual Sample Filter (PN: E020100)

The dual filter is designed with two sample filters plumbed in parallel with a split line. This formation
allows sample flow not to be affected, yet reduces the loading on each filter and therefore the
frequency with which they will need to be changed.

Table 10 – Dual Sample Filter Parts Added

Part Description Quantity Part Number

Sample Filter Holder 1 H010160
1/4T Union Tee Fitting 2 F030210-01
1/4T Suit Compression Ferrule 6 F030203-01
1/4T Compression Fitting Nut 6 F030202-01

The dual filter option is shown in the pneumatic diagram (dashed line) and requires no operational
changes to the instrument (refer to Section 9.5).

Figure 156 – Dual Filter Option Installed

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8.2 Test Lamp (PN: E020103)

The test lamp can be used to diagnose a problem within the measurement cell specifically the function
of the PMT. The test lamp is used in the Main Menu → Service Menu → Diagnostics Menu → Digital
Pots Menu by changing the Diagnostic Mode to Optic (refer to Section 3.4.15). If you have this option
installed you need to make sure it is enabled in the Hardware Menu before the feature can be used.

An example of using the Optic diagnostic feature is when running a span point if you get no response
from the instrument the Optic diagnostic feature can be used to divide up the system and verify that
the lack of response is not due to a failure of the measurement cell but more likely a failure of the
assemblies leading up to calibration system. If you get a response from the instrument regardless of
the concentration then the PMT is functioning and can be ruled out as the cause of the problem.

Figure 157 – Test Lamp

Table 11 – Test Lamp Parts Added

Part Description Quantity Part Number

Test Lamp 1 C020068-01
Quartz Window 1 H010002

Table 12 – Test Lamp Parts Removed

Part Description Quantity Part Number

Test Lamp Plug 1 H010026

8.3 Network Port (PN: E020101)

The network port option allows the user to setup and connect to a range of TCP/IP network options. If
the user has this option installed they need to make sure it is enabled in the Hardware Menu before
the feature can be used.

Table 13 – Network Port Parts Added

Part Description Quantity Part Number

Rear Panel PCA (Network Port) 1 C010002

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Table 14 – Network Port Parts Removed

Part Description Quantity Part Number

Rear Panel PCA 1 C010002-01
Rectangular Blanking Plug 1 H010067

 Refer to Section 3.4.29, for details on the network menu.

 Refer to Section 4.3, for details on network setup.

8.3.1 Hardware Setup

This procedure will need to be followed after a factory reset.

Procedure
1. Press - (the green instrument status light button), this will take the user to the home screen.
2. Press - (-99+) on the keypad. This will open the Advanced Menu.
3. Open - Advanced Menu → Hardware Menu.
4. Enable - Network Port → Enabled.

8.4 Rack Mount Kit (PN: E020116)

The rack mount kit is necessary for installing the Serinus into a 19” rack (the Serinus is 4RU in height).

Table 15 – Rack Mount Kit Parts Added

Part Description Quantity Part Number

Rack Slide Set 1 H010112
Rack Mount Adaptors 4 H010133
Rack Mount Ears 2 H010134
Spacers 4 HAR-8700
M6 x 20 Button Head Screws 8
M6 Washers 16
M6 Nyloc Nuts 8
M4 x 10 Button Head Screws 18
M4 Washers 8
M4 Nyloc Nuts 8
M6 Cage Nuts 8

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 Ser in u s ® 50 U ser M an u al 3 .3

Installing the Instrument

Procedure
1. Remove the rubber feet from the instrument (if attached).
2. Refer to Figure 158. Separate the slide rail assembly by pressing the black plastic clips in the slide
rails to remove the inner section of the rail.

Figure 158 – Separate Rack Slides

3. Refer to Figure 159. Attach the inner slide rails to each side of the instrument using M4 x 10 button
screws; three on each side.

Figure 159 – Assemble Inner Slide on Chassis

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4. Refer to Figure 160. Install rack mount ears on the front of the instrument using two M4 x 10 screws
on each side.

Figure 160 – Rack Mount Ears Fitted to Instrument

5. Refer to Figure 161. Attach the rack mount adaptors to the ends of the outer slide rails using M4 x
10 button screws, washers and locknuts. Do not fully tighten at this stage as minor adjustments
will be required to suit the length of the rack.

Figure 161 – Attach Rack Mount Adaptors to Outer Slides

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 Ser in u s ® 50 U ser M an u al 3 .3

6. Refer to Figure 162. Test fit the rack slide into your rack to determine the spacing of the rack mount
adaptors.

Figure 162 – Test Fit the Rack Slide Assembly into your Rack

7. Refer to Figure 163. Install the two assembled outer slide rails onto the left and right side of the
rack securely with M6 bolts; washer and locknuts/cage nuts.

Figure 163 – Attach Slides to Front of Rack

8. Now carefully insert the instrument into the rack by fitting the instrument slides into the mounted
rails. Ensuring that the rack slide locks engage on each side (you will hear a click from both sides).

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 CAUTION
When installing this instrument ensure that appropriate lifting equipment and
procedures are followed. It is recommended that two people lift the instrument
into the rack due to the weight, unless proper lifting equipment is available.

Note: Ensure both sides of the inner slide are attached to the outer slides before pushing into the
rack fully.

9. Push the instrument into the rack. Adjust and tighten the screws as required to achieve a smooth
and secure slide.

To Remove the Instrument

1. To remove the instrument first pull instrument forward of rack giving access to the slides.
2. Refer to Figure 164. Find the rack slide lock labelled Push and push it in whilst sliding the instrument
out of the rack, complete this for both sides while carefully removing instrument.

Figure 164 – Slide Clips

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 Ser in u s ® 50 U ser M an u al 3 .3

8.5 Internal Pump (PN: E020106)

Figure 165 – Internal Pump Option

8.5.1 Hardware Setup

This procedure should be followed after a factory reset:

Procedure
1. Press - (the green instrument status light), to return to the home screen.
2. Press - (-99+) on the keypad to open the Advanced Menu.
3. Open - Advanced Menu → Hardware Menu.
4. Enable - Internal Pump → Enabled.

8.5.2 Internal Pump Pneumatic

Refer to Section 9.6 for the Plumbing Schematic.

8.5.3 Internal Pump Additional Components

The Serinus 50 internal pump option includes the following additional components:

Table 16 – Internal Pump Parts Added

Part Description Quantity Part Number

Pressure Sensor Cable 1 C020062-02

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 Part Description Quantity Part Number
Heater and Thermistor Cable 1 C020083
DFU, 23 Micron 2 F010005
Internal Pump 1 H010027
Scrubber Assembly 1 H010038
#10 Orifice 1 H010043-09
Scrubber Support Ring 1 H010113
Flow Block Thermal Isolator 1 H010119
Flow Block Assembly 1 H010120
Lamp Driver PCA Bracket 1 H012115
Scrubber Assembly Bracket 1 H012172
Cable Clip Mount 13.5 X 14 mm (L X H) 3 H030121
Stop Valve 1 H030170
O-ring, 5/32 ID X 1/16 W 1 O010013

8.5.4 Internal Pump Removed Components

The Serinus 50 has a number of components missing from the standard instrument due to the presence
of the internal pump and flow block controlling flow within the instrument. The parts that have been
removed when internal pump is included are:

Table 17 – Internal Pump Parts Removed

Part Description Quantity Part Number

#12 Orifice 1 H010043-11
#20 Orifice 1 H010043-19

8.5.5 Pressure Calibration Internal Pump Option

The internal pump requires a separate modified procedure to allow the internal pump to generate the
necessary vacuum (refer to Section 5.2.3).

8.5.6 Flow Calibration

The flow calibration menu is only available when the internal pump option is installed (refer to Section
3.4.12).

The internal pump requires a separate flow calibration procedure. The flow calibration detailed in
Section 5.8 must be performed after any exchanges/changes to fittings, filters, pump service or
pressure calibration.

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 Ser in u s ® 50 U ser M an u al 3 .3

8.5.7 Leak Check Internal Pump Option

The internal pump requires a separate modified procedure to leak check the system (refer to
Section 6.4.4.1).

8.5.8 Pump Control

This section describes how to turn OFF and ON the internal pump for servicing and maintenance
purposes.

Procedure
1. Open - Main Menu → Service Menu → Diagnostics Menu → Internal Pump Menu.
2. Select - Pump Control → Manual.
3. Toggle OFF - Internal Pump → Off.

8.6 Metric Fittings Kit (PN: E020122)

The metric fittings kit allows the user to connect 6 mm tubing to the rear ports of the analyser. This
can be very handy if it is hard to source 1/4” tubing from a local supplier.

8.7 Internal Zero and Span (PN: E020135)

The Serinus 50 Internal Zero and Span (IZS) option is a permeation device used for checking the
response of the Serinus 50 at zero and one span point. This is achieved using the following:-
permeation oven, permeation tube, constant vacuum and a source of zero air (internal zero air
scrubber).

Air is drawn at 3.2 slpm through an external zero air scrubber connected to the BGnd Air Port. When
the internal zero mode is active, the IZS calibration valve manifold’s valves change to allow the zero
air to be drawn through the measurement system. When the internal span mode is active, the IZS
calibration valve manifold’s valves change to allow the zero air to pass by the permeation tube in the
permeation oven. This generates the span gas that is then drawn through the measurement system.
The permeation oven temperature is controlled by the main controller PCA, while the sample and
purge flow for the permeation oven is sourced from the vacuum supplied to the Exhaust port of the
instrument.

The output concentration of the permeation tube is displayed in the Calibration Menu as the menu
item Perm Conc. The Perm Conc concentration is calculated from the user editable fields Perm Rate,
Perm Flow and Perm Tube Oven located in the Hardware Menu. These menu items must be setup by
the user for the concentration value to be calculated and displayed correctly.

Note: It is important that as long as the permeation tube is installed in the permeation oven a
constant vacuum is supplied to the instrument.

Page 186
 Figure 166 – IZS Specific Internal Components Diagram

8.7.1 IZS Specifications

Table 18 – IZS Parts Added

Part Description Quantity Part Number

IZS Heater Cable for Permeation Oven 1 C020092
1/4" PTEF Straight Ferrule 1 F030028
Nut 1/4T Steel Gripper Fitting 1 F030029
KYNAR Union Tee Fitting 1 F030034-02
1/4T Compression Fitting Nut 12 F030202-01
1/4T Suit Compression Ferrule 12 F030203-01
1/4T Union Tee Fitting 4 F030210-01
1/4" to 1/8" Adaptor Fitting 3 H010007
#5 Orifice with O-Ring Groove 1 H010043-03
IZS Calibration Valve Manifold 1 H010056
Lamp Driver PCA Bracket (Vertical) 1 H012115
IZS Permeation Oven Assembly 1 H012170
Scrubber Bracket 1 H012172
O-ring, 5/32 ID X 1/16 W 1 O010013

Table 19 – IZS Parts Removed

Part Description Quantity Part Number

Calibration Valve Manifold Assembly 1 H010013-01

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 Ser in u s ® 50 U ser M an u al 3 .3

8.7.1.1 Permeation Oven

Output Concentration
Concentration will vary depending on permeation tube selected

Dilution Flow
0.850 ml/min ± 130 ml/min

Temperature Range
50 °C ± 3 °C

Permeation Chamber Size

Figure 167 – Typical Permeation Tube and Chamber Dimensions (Units in mm)

8.7.1.2 Power

Power Consumption
250 VA max (typical at warm up)

180 VA after warm up

8.7.1.3 Physical Dimensions

Weight
23.4 Kg

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8.7.2 IZS Setup
This section of the manual runs through the requirements to consider when selecting a permeation
tube as well an initial hardware setup for the calibration device to function correctly.

8.7.2.1 Selecting a Permeation Tube

The permeation oven fits “Wafer Device” type permeation tubes with ~46 mm of active material length
and ~16 mm outer diameter. Total housing length of the permeation tube is around ~55 mm x 19 mm.

Acoem Australasia recommends sourcing your permeation tube from a local supplier. Remember to
confirm your desired accuracy (± 10% or ± 25%) when ordering. Permeation tubes are specified with a
nominal value ± 10 - 25%. This means that if a perm tube is ordered with a permeation rate of
1080 ng/min, it can be as low as 810 ng/min or as high as 1350 ng/min. This does not mean the value
will fluctuate by that much, but the actual value observed from the permeation tube can vary as much
as 25% from the ordered value. Once installed and setup, perm tubes typically remain within 3% of
their set value.

8.7.2.2 Hardware Setup

This procedure should be followed after a factory reset or during the installation of a new permeation
tube.

Equipment Required

• Flow meter

Procedure
1. Press - (the green instrument status light), this will take you to the home screen.
2. Press - (-99+) on the keypad. This will open the Advanced Menu.
3. Open - Advanced Menu → Hardware Menu.
4. Enable - IZS Internal Span → Enabled.
5. Disconnect the permeation oven inlet and connect a flow meter (you should read around 130
ml/min purge flow while in this mode).
6. Press - (the green instrument status light), this will take you to the home screen.
7. Open - Main Menu → Calibration Menu.
8. Select - Zero Source → Internal.
9. Select - Span Source → Internal.
10. Select - Cal. Mode → Span.
11. Record the reading on the flow meter as your “perm oven flow” (should be around 830 ml/min).
12. Select - Cal. Mode → Measure.
13. Reconnect the permeation oven inlet.
14. Press - (the green instrument status light), this will take you to the home screen.
15. Press - (-99+) on the keypad. This will open the Advanced Menu.

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 Ser in u s ® 50 U ser M an u al 3 .3

16. Open - Advanced Menu → Hardware Menu.

17. Edit - Perm Flow - (Enter the flow value you recorded as “perm oven flow”) - Accept.
18. Edit - Perm Rate - (Refer to the certificate that accompanies your permeation tube for the
permeation rate in ng/min) - Accept.
19. Ensure the Perm Tube Oven is set to 50 °C.
20. Press - (the green instrument status light), this will take you to the home screen.
21. Open - Main Menu → Calibration Menu.
22. Perm Conc will now display the concentration being drawn through the measurement system
when a span point is running.

8.7.3 IZS Transporting/Storage

Transporting the instrument should be done with great care. It is recommended that the original
packaging material the Serinus was delivered in should be used when transporting or storing.

When transporting or storing the instrument the following points should be followed:

Procedure
1. Slide back or remove the lid to access the inside of the instrument.
2. Refer to Figure 168. Unscrew the white Teflon plug on top of the permeation oven and then pull
the split ring to fully remove the plug.

Figure 168 – Permeation Tube Removal

3. Remove the permeation tube from the permeation oven and store in its original shipping tube. If
the device will not be used for at least a week and its total useful life in less than a year, the device
should be placed in cold storage to prolong its useful lifespan.
4. Replace the Teflon plug back in to the permeation oven.
5. Allow the instrument some time to purge the pneumatic system.
6. Turn OFF the instrument and allow it to cool down.
7. Remove all pneumatic, power and communication connections.

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8. Remove the instrument from the rack.
9. If storing over a long period (six months) turn the battery OFF by switching the DIP switch (S1) on
the main controller PCA (refer to Figure 36).
10. Replace the red plugs into the pneumatic connections.
11. Remove the USB memory stick and pack with instrument (refer to Figure 36).
12. If you have the IZS option installed refer to Section 8.7.3 for specific transporting and storage
instructions.
13. Place the instrument back into a plastic bag with desiccant packs and seal the bag (ideally the bag
supplied upon delivery).
14. Place the instrument back into the original foam and box it was delivered in. If this is no longer
available find some equivalent packaging that provides protection from damage.
15. The instrument is now ready for long term storage or transportation.

8.7.4 IZS Calibration

8.7.4.1 IZS Pressure Calibration
To perform a pressure calibration refer to Section 5.2.

8.7.4.2 IZS Zero

Equipment Required

• None

Procedure
1. Open - Main Menu → Calibration Menu.
2. Select - Cal. Type → Manual - Accept.
3. Select - Zero Source → Internal - Accept.
4. Select - Cal. Mode → Zero - Accept.
5. Allow the instrument time to achieve a stable response.
6. Enter - Zero Calibrate SO2 - OK.
7. Select - Cal. Mode → Measure - Accept (To return to sample measure).

8.7.4.3 IZS Span

Equipment Required

• None

Procedure
1. Open - Main Menu → Calibration Menu.
2. Select - Cal. Type → Manual - Accept.

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 Ser in u s ® 50 U ser M an u al 3 .3

3. Select - Span Source → Internal - Accept.

4. Select - Cal. Mode → Span - Accept.
5. Let the instrument stabilise, typically 15 minutes.
6. Enter - Span Calibrate SO2 - (Enter the span output concentration) - Accept.
7. Select - Cal. Mode → Measure - Accept (To return to sample measure).

8.7.5 IZS Service and Maintenance

This maintenance kit is required when performing annual maintenance on the instrument. Depending
on the environment that the instrument is operating, the maintenance may need to be carried out
more often than yearly.

Table 20 – IZS Annual Maintenance Kit - (PN: E020212)

Part Description Quantity Part Number

Viton O-ring (3/4" ID X 1/16" W) 1 25000447-018
5g Desiccant Pack 2 C050014
Stainless Steel Sintered Filter 1 F010004
DFU, 23 Micron 2 F010005
M3 x 6 Nylon Washer Shoulder 2 F050040
Neoprene Washer (0.174" x 0.38" x 0.016") 2 F050041
Compression Spring 1 H010040
Stainless Steel Sintered Filter With O-ring Groove Body 2 H010047-01
Stainless Steel Sintered Filter With Screw In Body 3 H010053
Check Valve, 1/8" Barb 1 H030140
O-ring (0.364" ID X 0.070" W) 7 O010010
O-ring (0.426" ID X 0.070" W) 1 O010011
O-ring (5/32" ID X 1/16" W) 6 O010013
O-ring (1 11/16" ID X 3/32" W) 2 O010014
O-ring (1/4" ID X 1/16" W) 7 O010015
O-ring (13/16" ID X 1/16" W) 8 O010016
O-ring (1 5/8" ID X 1/16" W) 1 O010017
O-ring (5 3/4" ID X 3/32" W) 1 O010018
O-ring (0.208" ID X 0.07" W) 1 O010021
O-ring (1.739" ID X 0.07" W) 1 O010022
O-ring (BS015) 7 O010023
O-ring (0.114" ID X 0.07" W) 1 O010032
O-ring (1.989 ID x 0.07 W) 2 O010054
Ecotech Tubing 3 T010026

Page 192
8.7.5.1 IZS Leak Check
The following leak check procedure describes how to leak check the Serinus 50 with the IZS option.
Following the procedure in conjunction with the plumbing schematic and assembly drawing will enable
the user to track and repair system leaks.

Note: As the plumbing is complex and the plumbing diagram is not a physical representation of the
actual plumbing in the instrument, we refer to the valves in the procedure by name and valve
number. We also refer to port connections as NO, NC and C. This describes the state of the valve
when it is de-energised, Normally Open (NO) Normally Closed (NC) and Common (C).

Equipment Required

• Source of Vacuum (pump)

• Leak Test Jig (PN: H050069)
• Kynar 1/4” Blocker Nuts
• Tubing and Assorted Fittings
• 5/8” Spanner
• 9/16” Spanner
• 7/16” Spanner

Procedure

Note: Ensure that the instrument has been running for at least one hour before this procedure is
performed.

1. Turn OFF the vacuum source and allow the instrument to return to ambient pressure.
2. Disconnect all external tubing connected to the rear ports of the instrument.
3. Connect a leak check jig to the Exhaust Port of the instrument.
4. Connect a vacuum source to the shut off valve end of the leak test jig ensuring the shut off valve is
in the open position.
5. Open - Main Menu → Service Menu → Diagnostics Menu → Valve Menu.
6. Disable - Valve Sequencing → Disabled.
7. Turn Off all the valves except the Internal Span A and Internal Span B valves.
8. Block the BGnd Air Port.
9. Allow the instrument time to evacuate the pneumatic system (the time required will depend on
the vacuum source used).
10. Close the shut off valve and record the vacuum. Wait for three minutes and observe the gauge on
the leak check jig. It should not drop more than 5 kpa (37.5 torr). If the leak check passed skip to
step 12.

Note: The first test, leak checks the IZS path and the bulk of the pneumatic system.

11. Inspect the instrument’s plumbing looking for obvious damage. Check the condition of fittings,
particulate filter housing plus the O-rings both in the filter assembly and in the reaction cell

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 Ser in u s ® 50 U ser M an u al 3 .3

assembly. Locate and repair the leak by dividing up the pneumatic system into discrete sections
(refer to Section 9.7) then rerun the leak check procedure from step 5.
12. Remove the Blocker on the BGnd Air Port allowing the gauge to return to ambient.
13. Open - Main Menu → Service Menu → Diagnostics Menu → Valve Menu.
14. Turn Off all the valves.
15. Block the BGnd Air Port and the Sample Port.
16. Open the shut off valve and allow the instrument time to evacuate the pneumatic system (the time
required will depend on the vacuum source used).
17. Close the shut off valve and record the vacuum. Wait for three minutes and observe the gauge on
the leak check jig. It should not drop more than 5 kpa (37.5 torr). If the leak check passed skip to
step 19.

Note: The second leak check tests the sample path and the bulk of the pneumatic system.

18. Your leak is located somewhere in the sample path. The path consists of the blocked Sample Port
through the IZS Calibration valve manifold Sample Cal valve (V3 - NO) to the inlet of Internal Span
A valve (V1 - NO). Following this path described locate and repair the leak (refer to Section 9.7 and
9.16) then rerun the leak check procedure from step 13.
19. Remove the Blocker on the Sample Port allowing the gauge to return to ambient.
20. Open - Main Menu → Service Menu → Diagnostics Menu → Valve Menu.
21. Turn Off all the valves except for the Sample/Cal valve.
22. Block the BGnd Air Port and the Calibration Port.
23. Open the shut off valve and allow the instrument time to evacuate the pneumatic system (the time
required will depend on the vacuum source used).
24. Close the shut off valve and record the vacuum. Wait for three minutes and observe the gauge on
the leak check jig. It should not drop more than 5 kpa (37.5 torr). If the leak check passed skip to
step 26.

Note: The third leak check tests the calibration path and the bulk of the pneumatic system.

25. Your leak is located somewhere in the calibration path. The path consists of the blocked Calibration
Port through the IZS Calibration valve manifold Sample Cal valve (V3 - NC) port to the inlet of
Internal Span A valve (V1 - NO) port. Following this path described locate and repair the leak (refer
to Section 9.7 and 9.16) then rerun the leak check procedure from step 20.
26. Remove the blocker on the Calibration Port allowing the gauge to return to ambient.
27. Remove the blocker from the BGnd Air Port.
28. Inspect the internal pneumatics to ensure the tubing has a clean solid connection to the fittings.
29. Remove the leak check jig.
30. Enable - Valve Sequencing → Enabled.

Page 194
8.8 High Pressure Zero/Span Valves

High pressure span calibration valve (factory installed) PN: E020108

High pressure zero calibration valve (factory installed) PN: E020109

Note: Before using a high pressure span or zero as a source calibrating the instrument, check with
your local regulatory requirements.

Table 21 – High Pressure Zero/Span Valves Parts Added

Part Description Quantity Part Number

High Pressure Zero/Span Valve Assembly 1 H050043
O-Ring 5/32 ID X 1/16 W, BS007 1 O010013
#14 Orifice 1 H010043-13

Refer to Section 5.9 for operation of this installed option.

Refer to Section 9.19 for the exploded assembly drawing.

8.9 Trace Level Instrument (PN: E020126)

The trace option enables the instrument to detect sulfur dioxide from 0 - 2000 ppb with a lower
detectable limit of 100 ppt.

8.9.1 Trace Specifications

The following tables list the changes to a standard instrument with the trace option installed:

Table 22 – Trace Parts Added

Parts Added Quantity Part Number

Trace Reaction Cell Assembly 1 H012100-02

Table 23 – Trace Parts Removed

Parts Removed Quantity Part Numbers

Reaction Cell Assembly 1 H012100

8.9.1.1 Measurement

Range
0 - 2000 ppb autoranging

Lower detectable limit: 100 ppt, with Kalman filter active

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 Ser in u s ® 50 U ser M an u al 3 .3

8.9.1.2 Precision/Accuracy

Response Time
< 60 seconds to 90%

8.9.1.3 Calibration

Zero Drift
24 hours: < 200 ppt

Span Drift
24 hours: < 0.5% of reading or 1 ppb whichever is greater

8.9.2 Trace Setup

Sighting and System Setup

The sensitivity of the Serinus 50 trace requires special materials to be used for all measurement path
lines. These materials must be inert to the pollutant being measured as shown below:

 Sample Column: The sample column should be made of glass to prevent reactions with air drawn
into column.
 Sample Hood: The sample hood should be made of Teflon, ensuring that there is no sample
retention.
 Lines: All sample transport tubing, including zero and calibration lines, must be made of virgin
Teflon, PTFE or FEP.
 Regulator: A high purity, stainless steel dual stage regulator should be used.
 Stainless steel chromatography grade 1/8” gas lines should be used to connect span gas cylinder
to gas dilution device.
 Calibration should be carried out by flooding the sample manifold with 10 - 20 l/m of calibration
gas. This method ensures that all sample gas contact areas are exposed to the calibration gas.
 Zero calibrations should also involve flooding with zero gas at 10 - 20 l/m.
 Sample gas residence time in the manifold should be less than 3.5 seconds.

Instrument
 Connect 1/4” virgin PTFE FEP tubing to each end of the Charcoal scrubber. Connect one end to the
BGnd Air Port, and then connect the other end to the sample manifold.

8.9.3 Trace Operation

Pneumatics
A standard Serinus 50 instrument uses calibration valves to supply sample, span and zero air to the
inlet. The small error created from delivering gas through different lines is not measurable in standard
instruments but can offset results in a trace level instrument. To eliminate this difference the zero and
span gas is flooded directly into the sample manifold (the manifold pump or fan is disabled and isolated

Page 196
with a valve) to a point where it fills the entire manifold and overflows preventing any ambient external
air from entering. Thus the manifold inlet now becomes the calibration vent. The air within the
manifold is then drawn through the instrument where measurements can be taken and compared to
the concentration being delivered by the calibration system.

8.9.4 Trace Default Values

The Serinus 50 trace default parameters vary from the Serinus 50 standard setup. The following is a
list of the parameters and their new default values as well as expected values.

Table 24 – Trace Parameter Value Changes

Parameter Default Value

Input Pot 206
Bkgnd Fill 8 min

8.9.5 Trace Calibration Guidelines

To perform a multipoint calibration follow the procedure outlined in Section 5.7 for the general setup.
As some aspects of calibration need more attention the following steps outline some of the changes
in the calibration procedure that must be understood before performing any calibration:

Note: Before commencing a multipoint calibration, perform a manual background with zero air flowing at
10 - 20 Lpm into the column.

 Span/Zero gas should be injected directly into the sample manifold with a volume that will flood
the manifold preventing any external air from entering and influencing the Span/Zero gas.
 Losses may occur in the sample manifold and tubing due to contaminants entering during normal
measurement cycle. Flooding the sample manifold and tubing with zero air can help clean these
contaminants out.
 The instrument must be powered up and in normal measurement calibration mode (ie all gas lines
are attached and ready for use) for up to 48 hours before a calibration can be performed.

Note: A 48 hour preconditioning is necessary to warm-up materials and ensures that the instrument is
working at its optimum when the calibration is performed. This preconditioning is particularly important for
trace instrument calibrations due to the sensitive nature of the measurements.

 The Serinus 50 trace must be used in a laboratory environment which includes air conditioning to
stabilise the temperature.
 A zero test should be performed over a 24 hour period to get an accurate reading of the Lowest
Detectable Limit (LDL) of the entire system installation. Throughout this time period ten minute
intervals should be used to collect readings of the SO2 from the zero air. From the data acquired
the smallest detectable signal that can be accurately measured is found as well as the noise which
determines the stability and precision of readings.
 A 6 Point multipoint precision check must be performed. Five points (100, 80, 60, 40 and 20%)
throughout the sampling range and one point at zero.

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 Ser in u s ® 50 U ser M an u al 3 .3

Note: An extra point of reference in the multipoint precision check is necessary in trace instruments due to
the sensitive nature of the measurements.

 A shut off valve should be designed into the sample manifold system, whereby the fan or pump
used to draw in the sample air is turned OFF and the valve isolates the fan or pump from the sample
manifold, when a calibration is in process (as ambient air is not required for calibration and will
make calibration void). This valve can be controlled manually or via the data logger providing the
data logger is designed with this function.

8.9.6 Trace Service and Maintenance

The maintenance intervals are determined by compliance standards that differ in various regions. The
following is recommended by Acoem Australasia as a guide. Compliance with local regulatory or
international standards is the responsibility of the user. The below list only includes items that are
different to a standard range instrument:

Table 25 – Maintenance Schedule

Interval * Task Performed Section

Replace particulate filter 6.4.1
Check sample inlet system for moisture or
foreign materials and clean.
6 Monthly Perform multipoint precision check 8.9.5

* Suggested intervals for maintenance procedure are a guide only and may vary with sampling intensity and/or
environmental conditions. Refer to your local regulatory standard for your personalised maintenance schedule.

Page 198
9. Parts List and Schematics
9.1 Serinus Accessories Kit

This kit contains assorted fittings, tubing and an orifice removal tool which are useful when working
on the instruments internal pneumatics. This is usually purchased with the instrument.

Table 26 – Serinus Accessories Kit (PN: H010136)

Part Description Part Numbers Quantity

Fitting Nut 1/4T KYNAR Plug 036-130440-2 4
Fitting, Kynar, Union Tee 1/8” Barb - 400 F030007-01 4
Series
Fitting, Kynar, Union 1/8” Barb F030008 2
Kynar 1/4T Fitting Nut F030024 4
Adaptor, 1/4" Fitting To 1/8" Barb H010007 4
Adaptor,1/4" Tube To 1/8" Barb H010008 2
Tool, Extraction Orifice and Filter H010046 1
Cap, Black Rubber, 1/8” H030003 4
Cap, Black Rubber, 1/4” H030004 4
Tubing, 1/4" OD, 1/8" ID Black T010021 3 ft
Ecotech Tubing T010026 3 ft

9.2 Maintenance Kit

This maintenance kit is required when performing annual maintenance on the instrument. Depending
on the environment that the instrument is operating, this maintenance may need to be carried out
more often than yearly.

Table 27 – Serinus 50 Maintenance Kit - (PN: E020204)

Part Description Part Number Quantity

5 g Desiccant Pack C050014 2
DFU, 23 Micron F010005 1
Kynar Male Tee Fitting F030033-01 1
M3 x 6 Nylon Washer Shoulder F050040 2
Neoprene Washer (0.174" x 0.38" x 0.016") F050041 2
O-Ring (BS115) O010004 2
O-Ring (0.364 ID X 0.070 W) O010010 2
O-Ring (5/32 ID X 1/16 W (BS007)) O010013 5

Parts List and Schematics Page 199

 Ser in u s ® 50 U ser M an u al 3 .3

Part Description Part Number Quantity

Viton O-Ring (1 11/16 ID X 3/32 W) O010014 2
Viton O-Ring (1/4 ID X 1/16 W) O010015 2
Viton O-Ring (13/16 ID X 1/16 W) O010016 2
Viton O-Ring (1 5/8 X 1/16) O010017 1
Viton O-Ring (5 ¾ ID X 3/32 W) O010018 1
Viton O-Ring (0.208 ID X 0.07 W) O010021 1
Viton O-Ring (1.739 ID X 0.07 W) O010022 1
Viton O-Ring (BS015) O010023 4
Viton O-Ring (7/8 ID X 1/16 W) O010026 1
Viton O-Ring (0.987 ID X 0.103 W) O010027 1
Viton O-Ring (1.364 ID X 0.070 W) O010028 1
Viton O-Ring (0.799 ID X 0.103 W) O010029 1
Viton O-Ring (1.862 ID X 0.103 W) O010030 4
Viton O-Ring (5/16 ID X 1/2 OD X 3/32 W), O010031 1
Viton O-RING, BS032, VITON O010042 1
Viton O-RING, 1.989 ID x 0.07 W, O010054 2
Viton O-Ring (BS038) ORI-1019 1
Ecotech Tubing T010026 3 ft

9.3 Consumables

Parts shown as consumables below will require replacement over the course of the instrument’s
lifespan.

Table 28 – Serinus 50 Consumables

Consumable Part Number

Filter Paper Teflon 47 mm pack of 50 F010006-01
1 kg Bottle of Activated Charcoal ECO-1035
Orifice - Sample #12 H010043-11
Orifice - Sample #20 H010043-19
UV Lamp Assembly C020076
External Pump Repair Kit (suite 607 pump) P031001
Internal Pump Repair Kit (to suit KNF Pump) P031005
Zero Air Scrubber H010038
Ecotech Tubing, 25 ft Length T010026-01

Page 200
 Consumable Part Number
Annual Maintenance Kit E020204

*Warranty Disclaimer: The product is subject to a warranty on parts and labour from date of shipment
(the warranty period). The warranty period commences when the product is shipped from the factory.
Lamps, fuses, batteries and consumable items are not covered by this warranty.

Subject to use refers to variable ambient conditions, toxic gases, dirt, extremes of temperature and
moisture ingress may shorten the lifespan of components.

9.4 Instrument Parts List

List of Serinus 50 components and part numbers for reference.

Note: Before refer to the spare part number confirm the part number and its location in attached
drawings.

Table 29 – Spare Parts List (Main Components)

Part Description Part Number

Lamp Driver PCA C010006-01
Main Controller PCA E020230-01
Fan (Chassis and PMT Assembly) C020058
DFU, 23 Micron F010005
Calibration Valve Manifold Assembly H010013-01
Zero Air Scrubber H010038
Rear Panel PCA C010002-10
Rear Panel PCA (Network Port) C010002
Chassis Fan Filter Kit H010044
Front Panel Assembly H010130
LCD Display D010001-50
Sample Filter Holder H010160
Power Supply P010013
Reaction Cell Assembly H012100
Pressure Sensor PCA (Reaction Cell) C010004
UV Reference Detector & Preamplifier PCA C010008
Heater Thermistor Assembly (Reaction Cell) C020074
UV Lamp Assembly C020076
Gasket for Pressure Sensor PCA H010037
#12 Orifice (Reaction Cell) H010043-11

Parts List and Schematics Page 201

 Ser in u s ® 50 U ser M an u al 3 .3

Part Description Part Number

#20 Orifice (Reaction Cell) H010043-19
Retainer (Plano-Convex Lens) H012103
Retainer (Bi-Convex Lens) H012104
Optical Bandpass Filter (U340) H012114
UV Bandpass Filter H012116
Lens (Plano-Convex) H012117
Lens (Bi-Convex) H012118
PMT Assembly H012130
Cooler and Thermistor Assembly (PMT Assembly) C020088
PMT Magnetic Shield H011204
Heatsink H011209
Cold Block H011210
PMT Assembly Housing H011212
Photomultiplier Tube (PMT Assembly) H012132
Dual Hydrocarbon Kicker Assembly H012140

Table 30 – Spare Parts List (Cables)

Part Description Part Number

Pressure Sensor Cable C020062-01
Display Cable C020065
Analog & Digital I/O Cable C020066
Lamp Drive Cable C020067
Heater and Thermistor Cable C020081
UV Reference Detector & Preamplifier Cable C020090
Bluetooth Cable C020119
PMT Power Supply Cable C020050-02

Table 31 – Spare Parts List (O-rings)

Part Description Part Number

O-ring 1/4 ID X 1/16 W (Calibration Valve Manifold) O010015
O-ring 1.862 ID X 0.103 W (Zero Air Scrubber) O010030
O-ring 1.989 ID X 0.07 W (Sample Filter) O010054
O-ring 11/16 ID X 3/32 W (UV Lamp Holder) O010004
O-ring 5/32 ID X 1/16 W (Reaction Cell Orifice) O010013

Page 202
 Part Description Part Number
O-ring 1-5/8 ID X 1/16 W (Optical Bandpass Filter Cover) O010017
O-ring 0.208 ID X 0.07 W (Test Lamp Plug) O010021
O-ring 7/8 ID X 1/16 W (UV Bandpass Filter) O010026
O-ring 0.987 ID X 0.103 W (Lens, Plano-Convex) O010027
O-ring 1.364 ID X 0.070 W (Reaction Cell) O010028
O-ring 0.799 ID X 0.103 W (Lens, Bi-Convex) O010029
O-ring 5/16 ID X 1/2 OD X 3/32 W (UV Reference Detector) O010031
O-ring, BS032 (Optical Bandpass Filter Cover) O010042
O-ring, BS038 (Reaction Cell) ORI-1019
O-ring 1 1/4 ID X 1/16 W (Optical Bench Housing Plug) 25000419-4
O-ring 1.739 ID X 0.07 W (PMT Cable Desiccant Cap) O010022
O-ring 5-3/4 ID X 3/32 W (PMT Assembly Housing) O010018

Table 32 – Spare Parts List (Fittings)

Part Description Part Number

Kynar Union Fitting F030022
1/4" PTEF Straight Ferrule F030028
Nut 1/4T Steel Gripper Fitting F030029
Kynar Union Elbow Fitting F030030
1/4"-1/8" PTFE Ferrule Reducing F030031
1/4T Compression Fitting Nut F030202-01
1/4T Suit Compression Ferrule F030203-01
1/4T Union Tee Fitting F030210-01
1/4" to 1/8" Adaptor Fitting H010007
Male Connector Fitting F030200-01
Kynar Male Elbow Fitting F030032-02
Male Elbow Fitting F030201-01
Kynar Bulkhead Union Fitting F030023
Male Elbow Fitting F030025
Kynar Male Branch Tee Fitting F030033-01
M3 X 10 Spacer F050061
Shoulder Washer M3 X 6 F050040
Washer 0.178 X 0.38 X 0.016 F050041
Kynar Fitting Nut 1/4T (Double Plastic Ferrule) F030024

Parts List and Schematics Page 203

 Ser in u s ® 50 U ser M an u al 3 .3

Part Description Part Number

Kynar Union Tee Fitting F030034-01
Adaptor Tee Fitting F030211-01

Table 33 – Spare Parts List (Miscellaneous)

Part Description Part Number

Fan Bracket (PMT Assembly) H010005
PCB Support Bracket H010011-01
Filter Felt F010010
Scrubber Body H010049
Scrubber Cap H010050
Scrubber Support Screen H010051
Scrubber Spacer H010052
9/16” High Foot Bumper H010039
Black Blanking Plug H010041
Front Panel Clearance Spacer H010064
Network Port Blanking Plug H010067
Main Controller PCA Support Bracket (Rear Panel Side) H010111
Sample Filter Mounting Plate H010126
Roller Bearing H010131
Power Supply Bracket H010138
Rear Panel H010142
Push Button Slam Lock H030114
Nylon P Clip, 1/2" (12.7 mm) H030149
Scrubber Support Ring H010113
Main Controller PCA Support Bracket (Front Panel Side) H010117
Plug H010026
Reaction Cell Block H012101-01
Retainer (Optical Bandpass Filter) H012102
Reaction Cell Bracket H012105
Reaction Cell Housing Plug H012106
Adaptor (Reaction Cell to PMT Assembly) H012107
Baffle (Reaction Cell) H012109
Dump (Reaction Cell) H012111
Retainer (UV Reference Detector) H012112

Page 204
 Part Description Part Number
UV Lamp Block H012121
Baffle (UV Bandpass Filter) H012122
Retainer (UV Bandpass Filter) H012123
UV Lamp Collet (Stright Through) H012124
UV Lamp Collet (Blind) H012125
Cover (Lamp Driver PCB) H012108
Tie Bar (Reaction Cell to PMT Assembly) H012113
Heatsink Bracket H010006
Heatsink Spacer H011208
Optical Bench Housing Plug H011213
Ecotech Tubing T010026
1/4" Teflon Tubing TUB-1007
8 GB USB Memory Stick H030021
Cable Clip Mount 13.5 X 14 mm (L X H) H030121
Cable Clip Mount 13.5 X 14 mm (L X H) H030122
USB Cable COM-1440
Thumb Screw (Rear Panel) F050037
Thumb Screw (Main Controller PCA) F050120
Green Ecotech Resources USB Stick H030137-01
Cable Tie Mount 060-060130

Table 34 – Spare Parts List (Shipping)

Part Description Part Number

Desiccant Pack (5 gm) C050014
Shipping Box B010002
End Caps (Pair) B010026
Plastic Bag 760 X 1000 50 X UM B020001
Mid Support Cap B010034
Desiccant Pack (25 gm) C050012

Parts List and Schematics Page 205

 Ser in u s ® 50 U ser M an u al 3 .3

9.4.1 Optional Extras Spare Part List

Table 35 – Spare Part List (Test Lamp)

Part Description Part Number

Test Lamp C020068-01
Quartz Window H010002

Table 36 – Spare Part List (Internal Pump)

Part Description Part Number

Pressure Sensor Cable C020062-02
Heater and Thermistor Cable C020083
DFU, 23 Micron F010005
Internal Pump H010027
Scrubber Assembly H010038
#10 Orifice H010043-09
Scrubber Support Ring H010113
Flow Block Thermal Isolator H010119
Flow Block Assembly H010120
Lamp Driver PCA Bracket H012115
Scrubber Assembly Bracket H012172
Cable Clip Mount 13.5 X 14 mm (L X H) H030121
Stop Valve H030170
O-ring, 5/32 ID X 1/16 W O010013

Table 37 – Spare Part List (Metric Fittings Kit)

Part Description Part Number

Metric Fitting Kit E020122
Nut 1/4T Steel Gripper Fitting F030029
Reducing Ferrule, 1/4 - 6 mm F030071
Swagelok Fitting, Nut & Ferrule Set, 6 mm (Only for High Pressure F030077
Zero/Span Option)

Page 206
Table 38 – Spare Part List (IZS)

Part Description Part Number

IZS Heater Cable for Permeation Oven C020092
1/4" PTEF Straight Ferrule F030028
Nut 1/4T Steel Gripper Fitting F030029
KYNAR Union Tee Fitting F030034-02
1/4T Compression Fitting Nut F030202-01
1/4T Suit Compression Ferrule F030203-01
1/4T Union Tee Fitting F030210-01
1/4" to 1/8" Adaptor Fitting H010007
#5 Orifice with O-Ring Groove H010043-03
IZS Calibration Valve Manifold H010056
Lamp Driver PCA Bracket (Vertical) H012115
IZS Permeation Oven Assembly H012170
Scrubber Bracket H012172
O-ring, 5/32 ID X 1/16 W O010013

Table 39 – Spare Part List (High Pressure Zero/Span Valves)

Part Description Part Number

Bulkhead Fitting 1/4 T, SS 98300076
O-ring, BS015 O010023
Swagelok fitting pipe adaptor 1/4” T - 1/8” NPT, SS 28590462-3
#12 Orifice H010043-11
O-ring, 5/32 ID X 1/16 W O010013
M12 Star Washer F050131
M12 Flat Washer F050130
High Pressure Valve Assembly (Exclude the Orifice and O-Ring) H050043

Table 40 – Spare Part List (Trace Level Instrument)

Part Description Part Number

Trace Reaction Cell Assembly H012100-02

Parts List and Schematics Page 207

 Ser in u s ® 50 U ser M an u al 3 .3

9.5 Plumbing Schematic - (PN: D020003)

Page 208
9.6 Internal Pump Plumbing Schematic - (PN: D020006)

Parts List and Schematics Page 209

 Ser in u s ® 50 U ser M an u al 3 .3

9.7 IZS Plumbing Schematic - (PN: D020053)

Page 210
Parts List and Schematics Page 211
 Ser in u s ® 50 U ser M an u al 3 .3

9.8 Block Wiring Schematic - (PN: D020105)

Page 212
9.9 IZS Block Wiring Schematic - (PN: D020123)

Parts List and Schematics Page 213

 Ser in u s ® 50 U ser M an u al 3 .3

9.10 Optical Bench Assembly - (PN: H012130)

Page 214
9.11 Reaction Cell Assembly - (PN: H012100)

Parts List and Schematics Page 215

 Ser in u s ® 50 U ser M an u al 3 .3

9.12 Lamp Holder Assembly - (PN: H012120)

Page 216
9.13 Dump Assembly - (PN: H012110)

Parts List and Schematics Page 217

 Ser in u s ® 50 U ser M an u al 3 .3

9.14 Permeation Oven Assembly - (PN: H012170)

Page 218
9.15 Sample Filter Holder Assembly - (PN: H010160)

Parts List and Schematics Page 219

 Ser in u s ® 50 U ser M an u al 3 .3

9.16 Calibration Valve Manifold Assembly - (PN: H010013-01)

Page 220
9.17 IZS Calibration Valve Manifold Assembly - (PN: H010056)

Parts List and Schematics Page 221

 Ser in u s ® 50 U ser M an u al 3 .3

9.18 Valve Assembly - (PN: H010042)

Page 222
9.19 High Pressure Valve Exploded View - (PN: H050043)

Parts List and Schematics Page 223

 Ser in u s ® 50 U ser M an u al 3 .3

This page is intentionally blank.

Page 224
Appendix A. Advanced Protocol
The Advanced protocol allows access to the full list of instrument parameters.

A.1 Command Format

All commands and responses sent to and from the Instrument will be in the following packet format
to ensure data is reliable.

Table 41 – Packet Format

1 2 3 4 5 6 … 5+n 6+n 7+n

STX (2) Serial ID Command ETX (3) Message Message Checksu EOT (4)
Length (n) m

Where:

<STX> ASCII Start of Text = 0x02 hex.

Serial ID The Serial ID assigned in the Main Menu → Communications Menu →
Serial Communication Menu.
<ETX> ASCII End of Text = 0x03 hex.
Checksum The XOR of the individual bytes except for STX, ETX, EOT and Checksum.
Message length Must be in the range 0 - 32. Responses from the instrument can have a
message Length of 0 - 255.
<EOT> ASCII End of Transmission = 0x04 hex.

Examples
A basic request for Primary gas data would be as follows:

Table 42 – Example: Primary Gas Request

Byte 1 2 3 4 5 6 7 8
Number
Descripti STX ID Comman ETX Message Primary Checksu EOT
on d Length Gas Conc m
Value 2 0 1 3 1 50 50 4
Checksu 0 01=1 11=0 050=50 50
m
Calculati
on

And a sample response:

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 Ser in u s ® 50 U ser M an u al 3 .3

Table 43 – Example: Primary Gas Response

Byte 1 2 3 4 5 6 Continued
Number in next
table.
Descriptio STX ID Command ETX Message Primary
n Length Gas Conc
Value 2 0 1 3 5 50
Checksum 0 01=1 15=4 450=54
Calculation

Table 44 – Example: Primary Gas Response (Continued)

Byte 7 8 9 10 11 12
Number
Description IEEE representation of 1.00 Checksum EOT
Value 63 128 0 0 50 4
Checksum 5463=9 9128=137 1370=137 1370=137 137
Calculation

A.2 Commands

A.2.1 Communication Error

Where:

Command byte 0
Message byte 1 0
Message byte 2 0..7
If the command byte of a response is 0, this indicates an error has occurred. The message field will be
2 bytes long, where the 2nd byte indicates the error according to the following table.

Table 45 – List of Errors

Error # Description
0 Bad Checksum received
1 Invalid Parameter Length
2 Invalid Parameter
3 Internal Data Flash Erase in Progress unable to
return data for a few seconds
4 Unsupported Command.
5 Another process is collecting data - unable to
service request.

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 Error # Description
6 MemStick No Connected
7 MemStick Busy

A.2.2 Get IEEE Value

Where:

Command byte 1
Message byte 1 Index from List of Parameters
Message byte 2..32 Additional indexes (optional)
This command requests the value of an instrument parameter. The message field byte contains the
index of the parameter requested, as described in the List of Parameters.

Up to 32 indexes can be supplied in a single request. The response has 5 bytes for each parameter
requested - the first byte is the parameter index and the next four are the IEEE representation of the
current value.

Example
A request with a message field of 50,51,52 to a Serinus S40 would return a 15 byte message as shown
below:

Table 46 – Example: Get IEEE Response data

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
50 NO reading 51 NOx reading 52 NO2 reading

A.2.3 Set Calibration Mode

Where:

Command byte 4
Message byte 1 85
Message byte 2 - 5 The IEEE representation of 0, 1, 2, or 3
0 puts the instrument into Measure mode (0,0,0,0)
1 puts the instrument into Cycle mode (63,128,0,0)
2 puts the instrument into Zero mode (64,0,0,0)
3 puts the instrument into Span mode (64,64,0,0)
This command puts the instrument into a calibration mode (the same as going to the Calibration menu
and choosing a Cal. Mode).

Example

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 Ser in u s ® 50 U ser M an u al 3 .3

A request with a command of 4 and a message field of 85,64,64,0,0 would place the instrument into
Span mode.

A.2.4 Set Calibration

Enters a new calibration value: the same as entering Span Calibrate or Zero Calibrate on the calibration
menu.

Where:

Command byte 18
Message byte 1 0, 1, 2, or 3 where
0 = Span
1 = Zero (first zero gas)
2 = Zero (second zero gas)
3 = Zero (Third zero gas)
Message byte 2 - 5 The IEEE representation of the calibration value.

A.3 List of Parameters

Note: Parameters are for all Serinus series analysers and may not be applicable to an
individual instrument.

Table 47 – Advanced Protocol Parameter List

# Description Notes
1 Cal/Zero Valve 0 = Zero, 1 = Cal
2 Internal Span Valve 0 = OFF, 1 = ON
3 +Analog Supply Positive analog supply voltage
4 Gas 5 Avg. Average of the readings (for Gas5) of the last n minutes where n
is the averaging period E.g. Nx
5 Pregain S30H linearization coefficient gain
6 Sample/Cal Valve 0 = Sample, 1 = Cal/Zero
7 NOx Measure Valve 0 = NO, 1 = NOx
8 NOx Bypass Valve 0 = NO, 1 = NOx
9 NOx Backgnd Valve 0 = OFF, 1 = ON
10 Valve Sequencing 0 = OFF, 1 = ON
11 LCD Contrast Pot 0 = Lightest, 255 = Darkest
12 SO2 Ref Zero Pot S50 Reference zero pot
13 CO Input Pot S30 Input pot
14 CO Reference Test Pot Not Used

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 15 CO Test Measure Pot Not Used
16 High Volt Adjust Pot PMT High Voltage Adjust Pot for S50 & S40
17 SO2 Lamp Adjust Pot S50 Lamp adjustment Pot
18 O3 Lamp Adjust Pot S10 Lamp adjustment Pot
19 O3 Meas. Zero Pot (C) S10 Signal zero measure (coarse)
20 O3 Meas. Zero Pot (F) S10 Signal zero measure (fine)
21 PMT Fan Pot Optical Bench fan speed control pot
22 Rear Fan Pot Chassis Fan speed control pot
23 Pump Fine Pot Internal Pump speed fine pot
24 Pump Coarse Pot Internal Pump speed coarse pot
25 Analog input 0 SO2 Reference signal
26 Analog input 1 CO Reference signal
27 Analog input 2 O3 Reference signal
28 Analog input 3 SO2 & O3 Lamp current
29 Analog input 4 Flow block pressure
30 Analog input 5 Cell pressure
31 Analog input 6 Ambient pressure
32 Analog input 7 Raw ADC calibration input
33 Analog input 8 Reserved
34 Analog input 9 Concentration data
35 Analog input 10 Reserved
36 Analog input 11 Reserved
37 Analog input 12 Raw analog to digital count for external analog input 0. 0 - 5 V =
0 - 32766 A/D counts
38 Analog input 13 Raw analog to digital count for external analog input 1. 0 - 5 V =
0 - 32766 A/D counts
39 Analog input 14 Raw analog to digital count for external analog input 2. 0 - 5 V =
0 - 32766 A/D counts
40 Analog input 15 Reserved
41 CO Meas Zero Pot (C) S30 Measure ZERO coarse adjustment Pot
42 CO Meas Zero Pot (F) S30 Measure ZERO fine adjustment Pot
43 SO2 Input Pot SO2 Measure Signal Gain Pot
44 SO2 Ref. Gain Pot SO2 Reference Signal Gain Pot
45 SO2 Meas. Zero Pot SO2 Measure zero pot
46 O3 Input Pot O3 Input signal gain pot
47 Diagnostic Test Pot The Diagnostic mode adjustment pot for all the analysers except
for S30

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 Ser in u s ® 50 U ser M an u al 3 .3

48 NOx Input Pot PMT signal input gain control for NOx
49 PGA Gain 1, 2, 4, 8, 16, 32, 64, 128
50 Gas 1 Inst. Primary gas concentration currently displayed on the front
screen E.g. NO
51 Gas 2 Inst. Secondary gas concentration currently displayed on front screen
E.g. NOx
52 Gas 3 Inst. Calculated gas concentration currently displayed on front screen
E.g. NO2
53 Gas 1 Avg. Average of the readings (for Gas1) of the last n minutes where n
is the averaging period
54 Gas 2 Avg. Average of the readings (for Gas2) of the last n minutes where n
is the averaging period
55 Gas 3 Avg. Average of the readings (for Gas3) of the last n minutes where n
is the averaging period
56 Instrument Gain Current calibration value (default is 1.0)
57 Serial ID Multidrop or Bayern-Hessen gas id
58 Bayern-Hessen ID For multigas instruments only
59 Decimal Places 2-5
60 Noise Instrument noise
61 Gas 1 Offset An offset applied to Gas 1
62 Gas 3 Offset An offset applied to Gas 3
63 Flow Temperature Temperature of the flow block
64 Lamp Current Lamp current in mA E.g 35 mA
65 +5V Supply Digital Supply voltage (should always read close to 5 volts)
66 Conc. Voltage Concentration Voltage
67 High Voltage High Voltage reading for PMT
68 Ozonator 0 = OFF, 1 = ON
69 Control Loop 0 = OFF, 1 = ON (default is ON)
70 Diagnostic Mode 0 = Operate
1 = Preamp
2 = Electrical
3 = Optical
(default is Operate)
71 Gas Flow Units in slpm
72 Gas Pressure Units in torr
73 Ambient Pressure Units in torr
74 +12V Supply The 12 volt Power supply voltage
75 Cell Temperature Cell Temperature

Page 230
 76 Conv. Temperature Converter Temperature
77 Chassis Temperature Chassis Temperature
78 Manifold Temp. Manifold Temperature
79 Cooler Temperature Cooler Temperature
80 Mirror Temperature Mirror Temperature
81 Lamp Temperature Lamp Temperature
82 O3 Gen. Lamp Temp. O3 Lamp Temperature
83 Instrument Status Each bit in this 4-byte word represents a different condition (not
all conditions apply to every instrument model):

BIT Condition if set

0 Currently in warmup process
1 Volumetric units (ppm);
otherwise gravimetric units
(mg/m3)
2 Performing a background
3 Currently in Span mode
4 Currently in Zero mode
5 Instrument Out of Service (or in
Diagnostic mode, PTF
compensation or control loop
disabled, or Comms debugging
enabled)
6 High Voltage failure
7 System power failure (not actually
possible to report)
8 Reference voltage failure
9 Cell temperature failure
10 Cooler failure
11 Converter failure
12 Correlation wheel failure
13 Lamp source failure
14 Flow fault
15 Any system error (the red
instrument status light is ON)

84 Reference Voltage Units in Volts

85 Calibration State This variable has two different sets of values:

Set Calibration State Get IEEE Value

0 = MEASURE 0 = MEASURE

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 Ser in u s ® 50 U ser M an u al 3 .3

1 = CYCLE 1 = ZERO
2 = ZERO 2 = SPAN
3 = SPAN

86 Primary Raw Conc. (For S40, before NOx background and gain)
87 Secondary Raw Conc. Only for multigas instruments
(For S40, before NOx background and gain)
88 S40 Backgnd Conc. NOx Background Concentration
(For S40, before gain)
89 Cal. Pressure Calibration Pressure
90 Conv. Efficiency Converter Efficiency
91 Multidrop Baud Rate 0 = 1200 bps
1 = 2400 bps
2 = 4800 bps
3 = 9600 bps
4 = 14400 bps
5 = 19200 bps
6 = 38400 bps
92 Anlg Range AO 0 Maximum range value for analog output
93 Anlg Range AO 1
94 Anlg Range AO 2
95 Output Type AO 0 Output Type
96 Output Type AO 1 1 = Voltage
0 = Current
97 Output Type AO 2
98 Anlg Ofst/Rng AO 0 Voltage Offset /Current Range
99 Anlg Ofst/Rng AO 1 0 = 0% or 0 - 20mA
1 = 5% or 2 - 20mA
100 Anlg Ofst/Rng AO 2
2 = 10% or 4 - 20mA
101 F/Scale Volt AO 0 5.0 Volt Calibration value
102 F/Scale Volt AO 1
103 F/Scale Volt AO 2
104 Z Adj Volt AO 0 0.5 Volt Calibration value
105 Z Adj Volt AO 1
106 Z Adj Volt AO 2
107 -Analog Supply Negative analog supply
108 Digital Outputs A single byte expressing the most recent state of the digital
outputs
109 Digital Inputs A single byte expressing the most recent state of the digital
inputs

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 110 Instrument State 0 = Sample Fill
1 = Sample Measure
2 = Sample Fill Aux
3 = Sample Measure Aux
4 = Sample Fill Aux2
5 = Sample Measure Aux2
6 = Background Fill
7 = Background Measure
8 = Background Purge
9 = Background Fill Aux
10 = Background Measure Aux
11 = Zero Fill
12 = Zero Measure
13 = Zero Fill Aux
14 = Zero Measure Aux
15 = Zero Fill Aux2
16 = Measure Aux2
17 = Background Fill Zero
18 = Background Measure Zero
19 = Span Fill
20 = Span Measure
21 = Span Fill Aux
22 = Span Measure Aux
23 = Span Fill Aux2
24 = Span Measure Aux2
25 = Background Fill Span
26 = Background Measure Span
27 = Background Purge Span
28 = Electronic Zero Adjust
29 = Instrument Warm Up
30 = Background Adjust Fill
31 = Background Adjust Measure
111 CO Lin. Factor A CO Linearisation Factor A
112 CO Lin. Factor B CO Linearisation Factor B
113 CO Lin. Factor C CO Linearisation Factor C
114 CO Lin. Factor D CO Linearisation Factor D
115 CO Lin. Factor E CO Linearisation Factor E
116 Instrument Units 0 = ppm
1 = ppb
2 = ppt
3 = mg/m³
4 = µg/m³

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 Ser in u s ® 50 U ser M an u al 3 .3

5 = ng/m³
6=%
117 Backgnd Meas. Time In seconds.
118 Sample Fill Time These parameters can be changed, but only temporarily;
restarting the instrument will restore them to their default
119 Sample Measure Time values.
120 Aux Measure Time
121 Aux Smpl. Fill Time
122 Backgnd Fill Time
123 Zero Fill Time
124 Zero Measure Time
125 Span Fill Time
126 Span Measure Time
127 O3 Gen. Coeff D O3 Generator Coefficient D
128 Backgnd Pause Time In seconds
129 Bkgnd Intrleav Fact
130 Cal. Pressure 2 Calibration Pressure for 2nd gas
131 2nd Instrument Gain Only valid with an S40 variant set to multiple gains. Shows the
second gas gain (NO). Default is 1.0.
132 Background voltage Units in Volts
133 Perm Rate Permeation rate of the gas in ng/min
134 Perm Flow Total flow past the permeation chamber during an activated
internal span mode. In ml/min
135 Perm Oven Setpoint Set target temperature for the permeation oven. Default is 50 °C
136 Perm Oven Temp Temperature readout of the Permeation oven. Units in °C
137 Ozone Target Ozone Target for S10 IZS Ozone generation
138 Conc Adjusted 1 Concentration value in PPM before filtering
139 Conc Adjusted 2
140 Conc Adjusted 3
141 Chopper Speed Revolutions in the last second
142 Chopper Frequency In rpm
143 IR Source The S30 IR source voltage
144 Background (hrs) The background interval in hours.
0.0 if disabled
0.25 for every 15 minutes
0.30 for every 20 minutes
0.50 for every 30 minutes
1.00 for every hour
24.00 for once a day

Page 234
 145 Cycle Time In minutes
146 CO Cooler Pot CO Cooler voltage adjustment POT
147 CO Source Pot CO Source voltage adjustment POT
148 CO Test Meas. Pot Diagnostics use only
149 CO Test Ref. Pot Diagnostics use only
150 O3 Ref Average S10 Background Average
151 PTF Correction (gas 1) Pressure Temperature Flow Compensation Factor for first gas
152 PTF Correction (gas 2) Pressure Temperature Flow Compensation Factor for second gas
in dual gas analysers.
153 Inst. Cell Pressure Instantaneous cell pressure
154 Manifold Pressure Manifold Pressure in S40 instruments
155 Cell Press. (gas 1) Cell Pressure for Gas 1
156 Cell Press. (gas 2) Cell Pressure for Gas 2
157 Cell Press. (Bgnd) Cell Pressure when in Background
158 Background 0 = the instrument is measuring a gas sample
1 = the instrument is measuring background air
159 Gas To Measure S51 only; see Measurement Settings Menu
0 = Measure both gasses
1 = Measure SO2 only
2 = Measure H2S only
160 Valve States Diagnostic use only
161 Temperature Units 0 = "°C"
1 = "°F"
2 = "K"
162 Pressure Units 0 = "torr"
1 = "psi"
2 = "mbar"
3 = "atm"
4 = "kPa"
163 Averaging Period 0 = "1 Min"
1 = "3 Mins"
2 = "5 Mins"
3 = "10 Mins"
4 = "15 Mins"
5 = "30 Mins"
6 = "1 Hr"
7 = "4 Hrs"
8 = "8 Hrs"
9 = "12 Hrs"
10 = "24 Hrs"

Appendix Page 235

 Ser in u s ® 50 U ser M an u al 3 .3

11 = ”4 hrs/hr”
12 = ”8 hrs/hr”
13 = “2 Mins”
14 = “4 Mins”
15 = “6 Mins”
16 = “12 Mins”
17 = “20 Mins”
18 = “2 Hrs”
19 = “6 Hrs”
164 Filter Type 0 = NO FILTER
1 = KALMAN FILTER
2 = 10 SEC FILTER
3 = 30 SEC FILTER
4 = 60 SEC FILTER
5 = 90 SEC FILTER
6 = 300 SEC FILTER
7 = ADPTIVE FILTER
165 NO2 Filter enabled 0 = Disabled, 1 = Enabled
166 Background Interval 0 = 24 Hrs
1 = 12 Hrs
2 = 8 Hrs
3 = 6 Hrs
4 = 4 Hrs
5 = 2 Hrs
6 = Disable
Note: this parameter is deprecated; while it can still be read,
writing to it will have no effect. Use parameter 144 instead.
167 Service (COM1) Baud Serial baud rate
168 Multidrop (COM2) Baud 0 = 1200 bps
1 = 2400 bps
2 = 4800 bps
3 = 9600 bps
4 = 14400 bps
5 = 19200 bps
6 = 38400 bps
169 Service Protocol 0 = EC9800
170 Multidrop Protocol 1 = Bayern-Hessen
2 = Advanced
3 = Modbus
171 AO1 Over Range The Upper Concentration Range when Over-Ranging is enabled
172 AO2 Over Range
173 AO3 Over Range

Page 236
 174 AO1 Over-Ranging 0 = Over Ranging Disabled
175 AO2 Over-Ranging 1 = Over Ranging Enabled
2 = Over Ranging enabled and currently active
176 AO3 Over-Ranging
177 Heater Set Point Cell Heater Set Point units in °C
178 High Volt Adjust Pot High voltage pot setting
179 PMT Test LED Pot PMT Test LED intensity controller POT
180 Last Power Failure Time Stamp of the Last power fail (4 byte time stamp)
Bit 31:26 ---- Year (0 - 99)
Bit 25:22 ---- Month ( 1 - 12)
Bit 21:17 ---- Date (1 - 31)
Bit 16:12 ---- Hour (00 - 23)
Bit 11:06 ---- Min (00 - 59)
Bit 05:00 ---- Sec (00 - 59)
181 Inst Manifold Press. Manifold Pressure in S40 instruments (instantaneous)
182 Cell Press. (Gas 5) Cell Pressure for Gas 5 (Nx)
183 Gas 4 Inst. Calculated gas concentration currently displayed on front screen
E.g. NH3
184 Gas 4 Avg. Average of the readings (for Gas 4) of the last n minutes where n
is the averaging period E.g. NH3
185 Gas 5 Inst. Calculated gas concentration currently displayed on front screen
E.g. Nx
186 NH3 Conv. Efficiency
187 Cell/Lamp Duty Cycle
188 Mirror T. Duty Cycle
189 Flow Temp Duty Cycle
190 Cooler T. Duty Cycle
191 Conv Temp Duty Cycle
192 CO Conv T Duty Cycle
193 F/Scale Curr AO 0 20 mA Calibration value
194 F/Scale Curr AO 1
195 F/Scale Curr AO 2
196 Z Adj Curr AO 0 4 mA Calibration value
197 Z Adj Curr AO 1
198 Z Adj Curr AO 2
199 Ext Analog Input 0 The value of the external analog input after the multiplier and
offset have been applied
200 Ext Analog Input 1
201 Ext Analog Input 2
202 Conv Set Point Converter Set Point

Appendix Page 237

 Ser in u s ® 50 U ser M an u al 3 .3

203 Cal. Pressure 3 Calibration Pressure 3

204 PTF Correction (gas 3) Pressure Temperature Flow Compensation Factor for third gas in
multi-gas instruments.
205 Dilution Ratio The current dilution ratio (default is 1.0)
206 Traffic Light State of the status light:
0 = Green
1 = Amber
2 = OFF (normally impossible)
3 = Red
207 Network Protocol 0 = EC9800
1 = Bayern-Hessen
2 = Advanced
3 = Modbus
208 Gas 4 Offset An offset applied to Gas 4
209 O3 Gen. Fine Pot Ozone generator control, DAC controlled.
DAC: 0..64535
210 O3 Gen. Lamp Current Units in mA
211 O3 Gen. Coarse Pot Repeat of parameter 209
212 Logging Period The data logging period, in seconds (1.. 86400)
213 O3 Gen. Coeff A Ozone generator coefficients
214 O3 Gen. Coeff B Note that Coeff D is parameter 127

215 O3 Gen. Coeff C

216 Meas. Count S60 measure count
217 Sig. Count 1 S60 signal counts
218 Sig. Count 2
219 Sig. Count 3
220 Sig. Count 4
221 Signal Voltage S60 signal voltage
222 LED Drive S60 LED drive value
223 3rd Instrument Gain Only valid with an S44 variant set to multiple gains. Shows the
third gas gain (Nx). Default is 1.0.
224 Legacy PTF Method Only applies to S40 variants.
0 = new PTF calculation
1 = old PTF calculation inherited from ML
This value was added to Build 10800 and defaults to 1.
225 Chassis Humidity Only applies to S30 variants, and only on Rev P or later boards.
The current humidity inside the instrument, in percentage.
226 Opto. Strength Only applies to Rev P or later boards.
Optical signal strength.

Page 238
Appendix B. EC9800 Protocol
The Serinus implements a subset of the 9800 instrument protocol. Only the basic commands of reading
the concentration value and setting the instrument calibration state (measure, span or zero) are
supported.

B.1 Command Format

All commands are sent as ASCII strings. Fields are delimited by commas and the command ends with
the normal return key (i.e. the TERMINATOR is either a <CR> or a <LF>). The DEVICE I.D. is the Serial ID
assigned in the Main Menu → Communications Menu → Serial Communication Menu. If the
instrument is not being used in a multi-drop connection, the DEVICE I.D> can be replaced with the
string “???”.

B.2 Commands

B.2.1 DCONC
Function: Sends the current instantaneous concentration data to the serial port.
Format: DCONC, {<DEVICE I.D.>} {TERMINATOR}
Device response: {GAS} <SPACE> {STATUS WORD} <CR><LF>
The GAS value is the concentration value in the current instrument units, expressed as a floating point
number (i.e. 12.345). The STATUS WORD indicates the instrument status in hex (i.e. A01F) using the
following format:

Bit 15 = SYSFAIL (MSB)

Bit 14 = FLOWFAIL

Bit 13 = LAMPFAIL

Bit 12 = CHOPFAIL

Bit 11 = CVFAIL

Bit 10 = COOLERFAIL

Bit 9 = HEATERFAIL

Bit 8 = REFFAIL

Bit 7 = PS-FAIL

Bit 6 = HV-FAIL

Bit 5 = OUT OF SERVICE

Bit 4 = Instrument is in zero mode

Bit 3 = Instrument is in span mode

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 Ser in u s ® 50 U ser M an u al 3 .3

Bit 2 = Unused

Bit 1 = SET→PPM selected, CLEAR→MG/M3

Bit 0 = reserved (LSB)

B.2.2 DSPAN
Function: Commands the instrument to enter span mode.
Format: DSPAN, {<DEVICE I.D.>} {TERMINATOR}
Device response: <ACK> if the instrument is able to perform the command, <NAK> if not.

B.2.3 DZERO
Function: Commands the instrument to enter the zero mode.
Format: DZERO, {<DEVICE I.D.>} {TERMINATOR}
Device response: <ACK> if the instrument is able to perform the command, <NAK> if not.

B.2.4 ABORT
Function: Commands the instrument to abort the current span/zero mode and
return to measure mode.
Format: ABORT, {<DEVICE I.D.>} {TERMINATOR}
Device response: <ACK> if the instrument is able to perform the command, <NAK> if not.

B.2.5 RESET
Function: Reboots the instrument (software reset).
Format: RESET, {<DEVICE I.D.>} {TERMINATOR}
Device response: <ACK>.

Page 240
Appendix C. Bayern-Hessen Protocol
The Serinus implements a limited subset of the Bayern-Hessen Network protocol. Only the ability to
set the instrument calibration state (measure, span or zero) and read the gas concentrations are
supported.

C.1 Command Format

<STX><text><ETX>< bcc1><bcc2>

Where:

<STX> ASCII Start of Text = 0x02 hex.

<Text> ASCII text maximum length of 160 characters.
<ETX> ASCII End of Text = 0x03 hex.
<bcc1> ASCII representation of block check value MSB. (That is, the character
“3” for 3, the character “F” for 15, etc.)
<bcc2> ASCII representation of block check value LSB.
The block check algorithm begins with 0 and exclusive-OR’s each ASCII character from <STX> to <ETX>
inclusive. This block check value is converted to ASCII format and sent after the <ETX> character.

Examples
This is an example of a valid Bayern-Hessen data request for an instrument that has a Serial ID of 97
(Serial ID assigned in the Main Menu → Communications Menu → Serial Communication Menu):

<STX>DA097<EXT>3A

The block check calculation is best shown by the following example:

Table 48 – Bayern-Hessen Data

Character Hex Value Binary Block Check

<STX> 02 0000 0010 0000 0010
D 44 0100 0100 0100 0110
A 41 0100 0001 0000 0111
0 30 0011 0000 0011 0111
9 39 0011 1001 0000 1110
7 37 0011 0111 0011 1001
<ETX> 03 0000 0011 0011 1010

The binary value 0011 1010 corresponds to the hex value 3A. This value in ASCII forms the last two
characters of the data request message.

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 Ser in u s ® 50 U ser M an u al 3 .3

Note: The I.D. of 97 is sent as the sequence 097. All I.D. strings must have three digits and must
always be padded with ASCII zero characters.

This is an example of a valid command to put the unit in the manual span mode if the instrument has
an ID of 843:

<STX>ST843 K<ETX>52

The block check operation is best shown with the following table:

Table 49 – Block Check Operation

Character Hex Value Binary Block Check

<STX> 02 0000 0010 0000 0010
S 53 0101 0011 0101 0001
T 54 0101 0100 0000 0101
8 38 0011 1000 0011 1101
4 34 0011 0100 0000 1001
3 33 0011 0011 0011 1010
<SPACE> 20 0010 0000 0001 1010
K 4B 0100 1011 0101 0001
<ETX> 03 0000 0011 0101 0010

The binary block check value is 0101 0010 which is the hex value 52 as shown at the end of the
command string.

C.2 Commands

C.2.1 DA
Return the current instantaneous concentration.

Command Format
<STX>{DA}{<kkk>}<ETX>< bcc1><bcc2>

Where:

kkk Device’s ID. This field is optional, but if provided it must be padded with
zeros to be 3 characters long. The value must match one of the
following: the instrument’s Bayern-Hessen ID, 000, or ??? (three
question marks).
bcc1 First byte of the block check calculation.
bcc2 Second byte of the block check calculation.

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Device response
The instrument responds with a variable length string, depending on how many measured gasses have
been assigned an ID above 0. The text between the [ ] will be repeated once for each reported gas.

<STX>{MD}{cc}[<SP><kkk><SP><+nnnn+ee><SP><ss><SP><ff><SP><mmm><SP>eeeeee<SP>]<ETC><
bcc1><bcc2>

Where:

<SP> Space (0x20 hex).

cc The number of gasses reported (0..5). The text in between the [ ] will be
repeated once for each gas reported.
kkk The Bayern-Hessen instrument ID.
+nnnn+ee Gas concentration.
ss Status byte (see table below for individual bits).
ff Failure byte (see table below for individual bits).
mmm Gas ID.
eeeeee Ecotech instrument ID.
bcc1 First byte of the block check calculation.
bcc2 Second byte of the block check calculation.
Table 50 – Status Bit Map

Status Bit Meaning if set to 1

0 Instrument off (this value is always set to 0).
1 Out of service.
2 Zero mode.
3 Span mode.
4 -
5 -
6 Units: 1 = Volumetric, 0 = Gravimetric.
7 Background mode (S30 and S50 family only).

Table 51 – Failure Bit Map (Positive Logic)

Failure Bit Meaning if set to 1

0 Flow sensor failure.
1 Instrument failure. Note that while the In Maintenance mode reports as an instrument
failure with a red light on the front panel, for Bayern-Hessen this particular error is
merely a status instead of a failure.

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 Ser in u s ® 50 U ser M an u al 3 .3

Failure Bit Meaning if set to 1

2 -
3 Lamp failure (S40 family only).
4 -
5 Cell heater failure (S30, S40 and S50 family only).
6 -
7 -

C.2.2 ST
Set the instrument mode.

Command Format
<STX>{ST}{< kkk>}<SP>{command}<ETC><bcc1><bcc2>

Where:

kkk Device’s Serial ID. This field is optional, but if provided it must be padded
with zeros to be 3 characters long. The value must match one of the
following: the instrument’s Bayern-Hessen ID, 000, or ??? (three
question marks).
Command M, N or K for Measure, Zero or Span mode.
bcc1 First byte of the block check calculation.
bcc2 Second byte of the block check calculation.

Device response
The device does not issue a response to this command.

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Appendix D. ModBus Protocol
The Serinus supports a limited Modbus implementation. The only function codes supported are 3 (read
holding register) and 16 (write multiple registers). The Serial ID is assigned in the Main Menu →
Communications Menu → Serial Communication Menu.

D.1 Command Format

<Slave address><Function code><Start register (MSB)><Start register <LSB><Register count

(MSB)><Register count (LSB)><Write byte count><Write data><CRC (MSB)><CRC (LSB)>

Where:

Slave address The instrument Serial ID. If the request is being made via TCP, this field
is omitted.
Function code 3 (read) or 16 (write).
Start register Specifies an Advanced Protocol IEEE index (refer to Table 47 to see what
values are available and what index to specify for them). The ModBus
index is calculated from the Advanced Protocol index via the following
formula:
Mobus Index = Advanced Protocol Parameter List number x 2 + 256
Register count A single read command may request from 2 - 124 registers, which is to
say from 1 - 62 values. The first index is specified by Start register; all
following indexes are in sequential order. To read values that are not
sequential requires using another read command. Note that the
number of registers must be even, as each value is returned as a floating
point value (4 bytes) and each register is a word (2 bytes).
A write command can only write a single IEEE value at a time. Thus for
write commands this value must be 2.
Write byte count This field is only supplied for a write request; it indicates the amount of
bytes of data that will follow, and must be set to 4 (since only one value
can be written at a time).
Write data This field is only supplied for a write request. It is the value to be written,
expressed in IEEE format. The “Endian” structure can be selected on the
Modbus Serial Communications menu. Big Endian means that the MSB
byte of the IEEE value is at the right end of the four bytes; Little Endian
means it is at the left.
CRC Calculated by the standard Modbus CRC method. If the request is being
made via TCP, this field is omitted.

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 Ser in u s ® 50 U ser M an u al 3 .3

D.2 Commands

D.2.1 Read Holding Registers

The response to a read request is in the following format:

<Slave address>3<Register count (MSB)><Register count (LSB)><Data><CRC (MSB)><CRC (LSB)>

Where:

Slave address As general command format.

Register count As general command format.
Data 4 - 248 bytes of data, representing 1 - 62 floating point numbers in IEEE
format. The “Endian” structure can be selected on the Modbus Serial
Communications menu. Big Endian means that the MSB byte of the IEEE
value is at the right end of the four bytes; Little Endian means it is at the
left.
CRC As general command format.

D.2.2 Write Holding Register

The only supported use for this command is to set the instrument into a calibration state.

Where:

Start register MSB 1

Start register LSB 170
Register count 2
Write Data bytes The IEEE representation of 0, 1, 2, or 3
0 puts the instrument into Measure mode (0,0,0,0)
1 puts the instrument into Cycle mode (63,128,0,0)
2 puts the instrument into Zero mode (64,0,0,0)
3 puts the instrument into Span mode (64,64,0,0)
The response to a write request is to return the first six bytes of the initiating write request.

D.2.3 Error
An error will be returned in the following format:

<Slave address><Function code><Exception code><CRC (MSB)><CRC (LSB)>

Slave address As general command format.

Function code The initiating command’s function code + 128; so either 131 (read) or
144 (write).

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Exception code The error code (see table below).
CRC As general command format.
Table 52 – Modbus Error Codes

Value Error
1 Illegal Function
2 Illegal Data Address
3 Illegal Data Value
4 Slave Device Failure

Appendix Page 247

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