MANUAL

Electronic Preset Delivery System

Smith Meter® AccuLoad® IV
Installation and Maintenance Manual
Bulletin MN06201 Issue/Rev 0.1 (2/20)
Important
All information and technical specifications in this documentation have been carefully checked and compiled by
the author. However, we cannot completely exclude the possibility of errors. TechnipFMC is always grateful to be
informed of any errors. Contact us on the website.

Smith Meter is a registered trademark of TechnipFMC.

Caution
The default or operating values used in this manual and in the program of the AccuLoad IV are for factory testing
only and should not be construed as default or operating values for your metering system. Each metering system
is unique and each program parameter must be reviewed and programmed for that specific metering system ap-
plication.

Disclaimer
TechnipFMC hereby disclaims any and all responsibility for damages, including but not limited to consequential
damages, arising out of or related to the inputting of incorrect or improper program or default values entered in
connection with the AccuLoad IV.

Technical Support
Contact Information:
Field Service Response Center
24/7 Technical Support/Schedule a Technician: 1-844-798-3819
System Installation Supervision, Start-Up, and Commissioning Services Available

Customer Support
Contact Information:
Customer Service
TechnipFMC
FMC Technologies Measurement Solutions, Inc.
1602 Wagner Avenue
Erie, Pennsylvania 16510 USA
P: +1 814 898-5000
F: +1 814 899-8927
measurement.solutions@TechnipFMC.com
TechnipFMC.com

Literature Library:
http://info.smithmeter.com/literature/online_index.html

Page 2 • MN06201 ║ Issue/Rev. 0.1 (2/20)

AccuLoad IV Installation and Maintenance Manual Table of Contents

Table of Contents 8.5. DC Digital Output.......................................42

8.6. DC Digital Input..........................................42
1 – Introduction........................................................5
8.7. Analog Inputs.............................................43
1.1. Warnings and Precautions...........................5
8.8. RTD Temperature Probe analog input wiring
1.2. Weights & Measures Requirements............7
...............................................................43
2 – Pre-Installation Considerations.......................9
8.9. Analog Outputs..........................................44
2.1. Environment.................................................9
8.10. Meter Pulses (Product or Additive Meters)...44
2.2. Mechanical...................................................9
8.11. Pulse Outputs...........................................44
2.3. Electrical....................................................10
8.12. High speed prover output wiring..............45
3 – Installation.......................................................13
8.13. Additive Meters / Digital Inputs.................45
3.1. Electrical Installation..................................13
9 – Input and Output Details.................................47
3.1.1. For ATEX & IEC EX - Approved Installations
9.1. I/O Index Numbering..................................47
(Models ST and QT only)..................................13
9.1.1. A4M.........................................................47
3.1.2. For INMETRO (Brazil) Approved
9.1.2. A4B.........................................................47
Installations (Models ST and QT).....................13
9.1.3. A4I...........................................................47
3.2. General Requirements...............................14
9.2. Meter Connection Details...........................50
4 – AccuLoad Models............................................17
9.2.1. Prime 4....................................................50
5 – Wiring Connections.........................................21 9.2.2. Genesis...................................................50
5.1. A4M............................................................21 9.2.3. UPT Transmitter......................................50
5.1.1. A4M I/O Notes.........................................22 9.2.4. PPS Transmitter......................................51
5.2. A4B module (part of the QT and SA models 9.2.5. PA-6 Preamp...........................................51
only) ...............................................................22 9.2.6. Promass 80, 83, and 84 Coriolis Meters....52
5.3. A4I..............................................................23 9.2.7. Promass 83 and 84 Coriolis Meters........52
6 – Electronic Module Layouts.............................25 9.3. Meter Input Wiring Matrix...........................53
6.1. A4M Board.................................................25 9.3.1. AccuLoad IV - Models QT and SA Meter
6.2. A4B Board..................................................27 Inputs ...............................................................54
6.3. A4I Board...................................................28 9.3.2. AccuLoad IV Meter Input Wiring Matrix -

7 – General Wiring Notes......................................29 AccuLoad Models ST, and N4...........................55

7.1. AC Input Power..........................................29 10 – AccuLoad SA Components..........................57

7.2. DC Instrument Power.................................30 10.1. General....................................................57
7.3. Grounding..................................................30 10.2. FCM Components....................................58
7.4. Meter Pulses..............................................30 10.3. MMI Components.....................................59
7.5. Analog I/O Modules....................................31 10.3.1. MMI Components Locations.................59

8 – Typical Wiring Examples................................33 10.3.2. DC Power connections in the MMI........60

8.1. Communications - Ethernet.......................33 10.4. SA Addressing........................................60

8.1.1. How to Change the AccuLoad IV Internal 11 – Ethernet Wiring..............................................61

Address.............................................................33 12 – Completing the Installation..........................63
8.2. Communications - Serial............................39 12.1 Explosion-proof housing closure............63
8.3. AC Digital Input..........................................41 12.2. Sealing...................................................64
8.4. AC Digital Output.......................................42
Issue/Rev. 0.1 (2/20) ║ MN06201 • Page 3
AccuLoad IV Installation and Maintenance Manual Table of Contents

13 – Maintenance...................................................67
13.1 Enclosure Maintenance..........................67
13.2. A4I Kit Retrofit Installation......................68
13.3 Touch Screen Recalibration Procedures...69
13.3.1 Equipment and Other Requirements......69
13.3.2 Accessing the Display Module menu.....70
13.3.3 Display Module touch screen recalibration
procedure...............................................71
13.3.4 Alternate Methods to Initiate a Calibration.
...............................................................74
13.4 Touch Screen/Screen Protector Mainte-
nance.....................................................74
13.4.1 Electrostatic Discharge precautions.......75
13.4.2 Replacing the screen protector .............75
13.5 Touch Screen/Screen Protector Mainte-
nance.....................................................76
13.6 AccuLoad IV Clock Battery Replacement
Instructions.............................................76
13.6.1 Battery replacement procedure:.............76
13.7 Circuit board Return Merchandise Authori-
zation (RMA) Process Notes..................78

14 – Related Publications.....................................79

Page 4 • MN06201 ║ Issue/Rev. 0.1 (2/20)

AccuLoad IV Installation and Maintenance Manual Introduction

1 – Introduction

This manual provides guidance for the installation of AccuLoad preset models ST,
QT, N4 and SA. When installed following the guidelines contained in this manual, the
AccuLoad will provide many years of safe, accurate and reliable delivery control. This
manual addresses the requirements specific to the AccuLoad and it is assumed that
the installation designers and fabricators are familiar with the applicable industrial facil-
ity construction standards specific to the particular facility. The ST and QT models are
designed for use in Class 1 Div 1, Zone 1 hazardous locations while the N4 and SA
models are designed for Class 1 Div 2 environments. If questions arise, please contact
our Field Service Response Center or Customer Support.

1.1 Warnings and Precautions

Before you begin please read all of the following warnings and cautions to reduce the
risk of injury, equipment damage or malfunction.

Emergency Shutdown - The AccuLoad has an extensive set of built-in safety features.

IMPORTANT: The AccuLoad should never be relied upon to act as the primary safety
system control for the flow valve and pump controls, i.e. emergency stop, overfill,
ground protection, etc. These should always be handled by separate systems specifi-
cally designed for that application. For example Safety systems specifically to meet SIL
requirements. Any power control circuits from these external systems shall be wired in
series ahead of the AccuLoad to remove power to the ancillary devices.

Configuration - The AccuLoad is shipped from the factory in a completely initialized

state and must be properly configured for the specific installation prior to operation. The
unit will not operate due to alarm conditions until the configuration is completed. Using
a PC running the AccuMate program is the best method to set the initial configuration,
but if AccuMate is not available, all configuration parameters are accessible through
the front panel.

Hazardous Voltages - There are hazardous voltages involved in the installation

and maintenance of the AccuLoad and only qualified individuals should perform
this installation.

Hazardous Locations - The ST and QT models are approved for use in an explosive
(Class I, Div. 1, Groups C & D and Zone 1 Ex d ia, IIB Gb) atmosphere but there are
specific installation methods required to produce a comprehensive explosion-proof
system. This manual provides guidance for the AccuLoad installation only. In general,
keeping the front cover bolted closed in accordance with the instructions in Appendix
(section 12) is the key to maintaining explosion protection.

Any modification of the AccuLoad housing invalidates the hazardous location

rating of the AccuLoad.
• Do not replace the bolts in the front cover except with those supplied by the manufac-
turer. Using unapproved bolts invalidates the explosion-proof rating of the enclosure
• Do not drill or machine the housing.
• Do not attempt to replace the touchscreen or glass except as part of the factory
supplied assembly.

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AccuLoad IV Installation and Maintenance Manual Introduction

Electrostatic Discharge Precautions

The electronic components in the AccuLoad are susceptible to damage by static
discharge. To minimize the risk of damage, the following precautions should be followed:
• Before touching a circuit board with hands or tools, personnel/tools should be
grounded using a wrist strap.
• Avoid touching components or traces on the circuit boards and handle by the edges/
mounting holes.
• Circuit boards should be kept in conductive bags when not installed.

Electrostatic Discharge precautions during operations in Hazardous locations:

• The touch screen features a plastic screen protector installed from the factory
which has a surface area exceeding the area specified in IEC/EN 60079-0, as such
requires the following statement:
Warning: Clean Display with Damp Cloth only.
• This is to ensure that stray static charges are not built up on that surface which
could lead to a static discharge.

ATEX / IEC Installations - There are special requirements for ATEX approved instal-
lations. Please refer to section 3.1.1. for a detailed list of the specific requirements.

Field I/O Wiring - Refer to Section 5 for wiring example diagrams to ensure the correct
operation.
• Special care must be taken with shielding termination to ensure signal integrity. See
Section 3.2 for more information.
• The AC and DC wiring should be physically separated (do not use the same conduit/
entry) to avoid induced noise.
• The A4M module can supply a maximum of 1.0 amps at 24 VDC for meter transmit-
ters, digital I/O, etc.

RF Radiation:
The AccuLoad generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with this Manual, may cause interference to radio
communications. It has not been tested to comply with the limits pursuant to Part 15
(CFR 47) of FCC Rules, as electronic control equipment utilized by an industrial complex
is exempt from the rules.

Operation of this equipment in a residential area may cause interference, in which case
the user, at his own expense, will be required to take whatever measures that may be
required to correct the interference. The AccuLoad has been evaluated against the stan-
dard EN 61326-1: “Electrical equipment for measurement, control and laboratory use”
and has been found to comply to the European Community EMC Directive 2014/30/EU.

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AccuLoad IV Installation and Maintenance Manual Introduction

1.2 Weights & Measures Requirements

The AccuLoad is a device marketed for a global market. Requirements vary depending
on the region. It is a user requirement to verify that the AccuLoad is programmed and
operated in a manner consistent with local codes and that proper notification (permit for
use) or registration has been filed with the local authority or jurisdiction.

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AccuLoad IV Installation and Maintenance Manual Pre-Installation Considerations

2 – Pre-Installation Considerations

2.1. Environmental Considerations

Models ALIV-ST-XP and ALIV-QT-XP

The enclosures of Explosion / Flame proof models are manufactured from aluminum
alloy, and are designed to be operated in normal environmental conditions free of
corrosive agents.

In areas including but not limited to environmentally corrosive atmospheres, special

considerations for additional environmental protection shall be made if installing into near
shore areas that are subject to wind borne salt sea water spray and subject to possible
continuous accumulations of wetted salt water on the equipment. The recommended
protection is exclusion of the environment by placing the equipment into secondary
protected environment such as a kiosk or a control room. If exclusion of the environment
is not possible, then extra means must be taken to maintain the equipment integrity,
this includes frequent cleaning and inspection intervals. See section 13 for additional
information.

Model ALIV-SA

The enclosure is manufactured from stainless steel and offers a higher resistance to
corrosive environmental atmospheres. See section 13 for additional information.

All modes of AccuLoad IV

In areas where the ambient temperature is very high, it is recommended that the equip-
ment be installed under a canopy / sun shield to limit direct sunlight radiation.

In areas of high humidity (tropical) or with varying temperature swings, it is recom-

mended to place TechnipFMC P/N 647 001 443 or similar desiccant packs inside of the
enclosures, and to maintain these while in service.

2.2. Mechanical

In addition to the following installation recommendations, all previous warnings and

cautions should be reviewed before installation.
1. A solid bracket (rear or bottom mount) should be used to support the AccuLoad. Re-
fer to the AccuLoad specification SS06200 for the weight and mounting dimensions.
2. The location and the height of AccuLoad should permit easy operation of the front
touch screen panel and allow for a near - perpendicular viewing angle to minimize
parallax effects.
3. Leave room for the front panel of the AccuLoad to open at least 90 degrees to
provide access for servicing the AccuLoad. Note: The covers are hinged on the left.
4. Refer to specifications SS06200 for details of the location and size of the wiring access
openings in the enclosures.

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AccuLoad IV Installation and Maintenance Manual Pre-Installation Considerations

Table 1. Cable Access

Model Top Cable Access Bottom Cable Access

AccuLoad ST 2 – 1” 11.5 NPT 3 – 1.25” 11.5 NPT
AccuLoad QT 1 – 1” 11.5 NPT 2 – 1.25” 11.5 NPT
5 – 1” 11.5 NPT
AccuLoad N4 3 – 1.75”
AccuLoad SA MMI 3 – 1.75”
AccuLoad SA FCM 10 – 2”

5. While the AccuLoad is rated to operate in ambient temperatures up to 60 degrees

Celsius, it is advisable to keep all electronics as cool as possible to reduce thermal
stress on the electronic components. In hot, sunny areas, the AccuLoad should be
mounted in shade to prevent the housing from exceeding the rated temperature.

2.3. Electrical
1. All wiring must be routed into AccuLoad through the cable entries. Do not route DC
and AC wiring through the same conduit entry.
2. The DC signal wires must be shielded multi-conductor cable of 18 to 24 AWG
minimum stranded copper.
Note: The following recommendations are based on our knowledge of the electrical
codes. The local electrical codes should be reviewed to ensure that these recommenda-
tions follow the local code. Also installation manuals of all the equipment being wired into
the AccuLoad should be reviewed for transmission distances and wire recommendations.
Table 2. Typical Wire Sizes

Equipment Number and Gauge of Wire Belden Number or Equivalent

Transmitters 4 / 18 Ga. 9418
4 / 20 Ga. 8404
Temp. Probes Density and Pressure 4 / 22 Ga. 8729 or 9940
Transmitters
EIA-232 3 / 24 Ga. 9533
EIA-485 Communications 4 / 24 Ga. 9842
Ethernet Cat 5/6 1584A / 2412

Table 3. Serial Communications (EIA-232) Maximum Cable Length and Baud Rate
Baud Rate Feet Meters
115,200 62.5 18.25
57,600 125 37.5
38,400 250 75
19,200 500 150
9,600 1,000 305

Table 4. Serial Communications (EIA-485) Maximum Cable Length and Baud Rate

Baud Rate Feet Meters

9,600 to 115,200 4,000 1,220

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AccuLoad IV Installation and Maintenance Manual Pre-Installation Considerations

3. For Ethernet connections, a minimum of CAT-5 rated cable should be used and the
Ethernet wiring practices described in the Ethernet standard should be followed for
cable lengths etc..
4. Connectors are sized for a maximum of 14 gauge wire, consult the local electrical
codes for the minimum wire size required for your application.
5. All AC wiring should be stranded copper and must comply with federal, state and
local codes and specifications.
6. Two separate AC circuits must be provided from the breaker panel. One cir-
cuit will supply isolated power to the AccuLoad electronics (instrument power).
The second circuit will supply power to the external devices. See section 7.1.
7. For proper operation the AccuLoad must be earth grounded. The grounding point
should be as close to the unit as possible. To ensure proper earth ground the re-
sistance between the ground lug in the AccuLoad and the grounding point must not
exceed 2 Ω. The proper grounding point is a ½" to ¾" diameter copper stake that
extends into the water table. Where this is not practical, a ground plane may be used.

Note: Electrical conduit, piping, and structural steel are not considered proper
grounding points for equipment using electronics.

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AccuLoad IV Installation and Maintenance Manual Installation

3 – Installation

The general steps in the installation process are to physically mount the AccuLoad, elec-
trically connect it to the associated equipment and then tailor the configuration database
parameters to suit the specific operational and measurement environment. The following
sections cover the mounting and wiring. Refer to the AccuLoad IV Specification SS06200
for the mounting dimensions. For information regarding the proper settings in the con-
figuration database, refer to the AccuLoad IV Operators Reference Manual MN06200.

3.1. Electrical Installation

For ATEX & IEC EX – Approved Installations (Models ST and QT only)

3.1.1.

(a) Cable Entry must be in accordance to IEC 60079-1 section 13:

For wiring systems utilizing cable glands, the gland and/or thread adaptor must
be Ex d certified. The cable end must be securely installed and, depending on the
cable type, be properly protected from mechanical damage. Requirements outlined
in Section 10.4 of IEC 60079-14 shall be followed.
For wiring systems utilizing conduit, an Ex d certified sealing device must be imme-
diately at the entrance of the enclosure. Any unused entry must be suitably blocked
with an Ex d IIB IP 65 certified plug for ATEX and IECEx applications. For North
American Zone applications, the plug must be listed close up type. Requirements
outlined in Section 10.5 of IEC 60079-14 shall be followed.
(b) Installation:
General Installation to be in accordance with IEC 60079-14, wiring system to be in
accordance with section 9.

(c) Special conditions for safe use:

• Select wiring and cable glands suitable for 81°C operation.
• Flame Path Dimensions: Flanged joint widths are 19.05 mm minimum The clear-
ance between the flat joint surfaces is less than 0.05 mm (0.002") or such that
a (0.002") feeler gauge will not enter the joint more than (0.125”) 3.2 mm at any
point. Flameproof joints shall be maintained as outlined in section 10.4 or IEC
60079-14.

(d) Cover Fasteners:

Special Fasteners: Cover Bolts – steel grade 12.9, M8 x 1.25.

(e) Warnings:
To prevent ignition of hazardous atmospheres, disconnect from supply before open-
ing. Keep tightly closed when circuits are alive. Contains internal battery-powered
circuit, to prevent the ignition of hazardous atmospheres, do not open enclosure
unless the area is known to be non-hazardous. To reduce the risk of ignition of
hazardous atmospheres, conduit runs must have a sealing fitting connected within
18 inches of the enclosure. Substitution of components may impair intrinsic safety.
Note: The maximum ambient temperature for the enclosure is 60°C for ATEX and
IECEx applications and 55°C for North American Zone applications.

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AccuLoad IV Installation and Maintenance Manual Installation

(f) Grounding:
The Touch Keypad sensor is protected by an intrinsic safe barrier, the enclosure must
be grounded as per national electrical code regulations, for example NEC/CEC, etc.
Equipment bonding shall be provided at the external grounding facility terminal,
external connection is not required when using metallic conduit or armored cable.
External grounding facility terminal wire range: 10-12 AWG (5.26 mm2 to 3.31
mm2 wire).

For INMETRO (Brazil) Approved Installations (Models ST and QT)

3.1.2.

(a) Call cable entries must meet the requirements of ABNT NBR IEC 60079-1:
Any installation accessories used in the cable entries, such as cable glands, adapters
or bushings, must be certified as Ex d. The cable ends must be properly installed
and adequately protected against mechanical damage.
For a wiring system using conduits, a certified sealing unit must be used immediately
at the entrance of the enclosure. Any unused input must be correctly closed with a
certified device that guarantees the type and degree of protection (IP65).
(b) Special conditions for Safe Use:
Select cables and cable glands suitable for operation at 81° C.
Contact the manufacturer at the address indicated for information on the dimensions
of the flameproof joints.
(c) Cover Fasteners:
Special fasteners: The EX d enclosure cover mounting bolts must be grade 12.9
(steel) M8 x 1.25.

(d) Warnings:
Contains battery-powered internal circuits. To avoid igniting an explosive atmo-
sphere, do not open the cabinet unless it is known to be non-hazardous. Component
replacement can impair intrinsic safety. To prevent ignition of an explosive atmo-
sphere and to avoid electric shock, disconnect the power circuits before opening
the EX d enclosure. While the electrical circuits are energized, during operation,
keep the Ex d enclosure properly closed.
Note: The maximum ambient temperature for the equipment is 60° C.
(e) Grounding:
The touch screen (if provided) is protected by an Intrinsic safe barrier, the Ex d
enclosure must be grounded in accordance with national electrical code regulations.
The ground connection must be made through the external ground terminal of the
Ex d enclosure, no external connection is necessary when using metal conduits or
shielded cables.
The cross section of the external ground wiring must be: 10-12 AWG (5.26 mm²
to 3.31 mm²)

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AccuLoad IV Installation and Maintenance Manual Installation

3.2. General Requirements

(a) It is imperative that the electrical installation be performed by a competent

individual that is familiar with associated risks involved with the installation, operation,
and maintenance, of electrical equipment in hazardous (classified) locations. This
individual must possess knowledge of local, national electrical codes, and/or
ordinances concerned with hazardous location safety requirements. It is
recommended (may be required in some jurisdictions) that the final installation
should be verified / inspected by the authority having jurisdiction before placing the
equipment into service.

Electrical installations in hazardous areas have features specifically designed to

make them suitable for use in such locations and it is the operator’s responsibility
to maintain the integrity of those special features.

The operator must ensure that electrical equipment is:

• Installed and operated correctly

• Monitored on a regular basis

• Maintained with due regard to safety

(b) AC Circuits must be isolated from DC circuits and brought into the unit through
their respective conduit openings.

(c) Be sure all connections on the terminal blocks are tight.

(d) All shields must be connected to terminals 3, 13, 14, or 15 on terminal block TBE4
on the A4M Board, or terminals 9 and 10 on TB14 on the A4B Board.

All exposed shields must be properly insulated to prevent short circuits to other
terminals or to the chassis. The shield at the device (e.g., temperature device,
transmitter, etc.) must be cut back to the insulation and taped off. All shields should
be continuous. If splices are required, they must be soldered and properly insulated.
If other communicating devices are used with the AccuLoad, refer to the manual
for that unit for shielding information. Shields for other communicating equipment
should not be terminated in the AccuLoad.

Note: Shields must not be terminated at the ground lugs.

(e) Sufficient slack should be provided for the wiring in the AccuLoad to permit easy
removal of the boards. With sufficient slack, the terminal blocks can be removed and
laid back out of the way so that the boards can be replaced without removing
individual wires..

(f) There is a ground lug provided in the unit. The wire from the lug should be connected
to the proper grounding point. See Pre-Installation section.

(g) Typical electrical installation diagrams are provided in the following sections to show
the electrical connection between the AccuLoad and ancillary equipment. Before
wiring the ancillary equipment, refer to its installation manual.

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AccuLoad IV Installation and Maintenance Manual AccuLoad Models

4 – AccuLoad Models

There are four models of the AccuLoad: the ST, QT, N4, and SA shown in the following
figures:

Figure 1. AccuLoad IV-ST

Figure 2. AccuLoad IV-QT

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AccuLoad IV Installation and Maintenance Manual AccuLoad Models

Figure 3. AccuLoad Model N4

DC WIRING TRAY

AC WIRING TRAY
DC WIRING TRAY

DC WIRING TRAY

'A' 'B' 'C' 'D'

Figure 4. AccuLoad Model SA

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AccuLoad IV Installation and Maintenance Manual AccuLoad Models

There is a common set of electronic modules used in the different AccuLoad models
as follows:

THMI – The touchscreen display module mounted in the front panel of the unit.

A4M – The main CPU and I/O module. All AccuLoad models will contain at least one
A4M module.

A4B – Provides expanded I/O capability to support additional load arms.

Note: Models ST and N4 do not utilize this board.

A4I – An optional module which provides expanded I/O capacity usually used to support
additional injectors (can be mounted externally in a separate enclosure or internal mount)

Card Reader – Proximity card reader with serial communications interface.

Integrated - only available in models -N4 or -MMI. Standalone version available for Div
1 / Zone 1 applications.

Table 5. Electronic modules by model

Model Standard Modules Optional Modules

AccuLoad – ST THMI, A4M External A4I (one or two)
AccuLoad – N4 THMI, A4M Maximum of two A4I modules. Only one may
be installed internal, card reader
AccuLoad – QT THMI, A4M, A4B One or two internal or external A4I modules
AccuLoad - SA MMI THMI Card reader, Ethernet extender, power supply,
USB to serial adapter
AccuLoad - SA FCM A4M, A4B Up to 3 additional A4M + A4B board sets,
Up to 8 A4I modules internal or external

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AccuLoad IV Installation and Maintenance Manual AccuLoad Models

Table 6. Functions and capacities by module

Module Usage/Location Power Interfaces Description

THMI Front cover of: ST 24 VDC Ethernet Provides user interface
QT USB touch screen. Connects to
N4 Serial the A4M with Ethernet.
SA - MMI
A4M ST 93 – 230 Meter Pulse Main I/O board. Provides up
QT VAC Input to 6 dual channel product
N4 Pulse Outputs meter pulse inputs, pulse
SA - FCM Digital I/O inputs not used for product
AC/DC meters can be used for up
Analog I/O to 4 metered injector pulse
Ethernet inputs.
A4B QT 24 VDC Meter Pulse I/O expansion for the QT
SA – FCM Input and SA models
Digital I/O
AC/DC
Ethernet
A4I Optional internally 24 VDC Additive meter Optional I/O expansion
mounted in – pulse input module. Generally used for
ST Digital Input metered injector interface.
QT DC
SA – FCM Digital Output
or May be mounted AC
in separate
enclosure
Card Optionally mounted 24 VDC Serial Comm. Proximity card reader for
Reader in front cover ofN4 access control
or SA – MMI
or Mounted in
separate enclosure

Page 20 • MN06201 ║ Issue/Rev. 0.1 (2/20)

AccuLoad IV Installation and Maintenance Manual Wiring Connections

5 – Wiring Connections

The following figures identify the wiring connections on each of the electronic modules.

USB

CN3
CN4
1 V+ 12/24 V 12345
2 GND
3 GND

ETH1

CN6

Figure 5. THMI Module Connectors

5.1. A4M
TBE5
1 RTD +
2 SIG +
PT1
3 SIG -
1 +
4 RTD - Pulse In 1 Enet Enet
2 -
5 RTD + 3 2
3 + TBE2
6 SIG + Pulse In 2 1
4 -
7 SIG - Enet Enet 2
5 + 4 1
8 RTD - Pulse In 3 3
6 -
9 RTD + 4
7 +
10 SIG + Pulse In 4 PT2 5
8 -
11 SIG - 1 + 6
9 + Pulse In 7
12 RTD - Pulse In 5 2 -
10 - TBE3
13 SIG + 3 +
11 + Pulse In 8 1
14 SIG - Pulse In 6 4 -
12 - 2
15 SIG +
TBK1 3
16 SIG - S1
1 TX 4
17 SIG + OFF 1 ON
2 RX 5
18 SIG -
Com 1 6
3 RTS
TBE6 232
7
4 CTS 8
1 HS Prv +
5 COM 8
2 HS Prv - OFF 1 ON
6 TX + 9
3 RTD +
7 TX - 10
4 RTD - 4
8 RX + 485 11
5 RTD + S2
9 RX - 12
6 RTD -
10 COM
7 RTD + TBK2 TBE7
8 RTD - TBK4 1 TX 1
9 Gnd 1 + Com 2 2
In 1 DC 2 RX
2 - 232
10 Gnd 3 COM 3
TBE4 3 + 4 TX + 4
In 2 DC
1 TX 4 - 5 TX - 5
Com 4 5 + 6
2 RX In 3 DC 6 RX + 485
232 6 -
3 Com 7 RX - 7
4 - 7 + Pulse 8 COM 8
In 4 DC 8 - Out 1 9
5 + TBK3
6 - 9 N.C. 10
In 5 DC 1 TX +
7 + 10 N.C.
2 TX -
8 - TBK5 3 RX +
Com 3 microSD
In 6 DC 485
9 + 1 + Card
Out 1 DC 4 RX -
10 2 - 5 COM
+24 VDC CN4
11 3 +
Out Out 2 DC
12 4 -
13 5 + L1 L2 Gnd
Out 3 DC
14 DC Gnd F2 6 - F1
• • •
15 7 + Pulse
16 +24 VDC In 24 V 8 - Out 2 TBE1

Figure 6. A4M Connections

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AccuLoad IV Installation and Maintenance Manual Wiring Connections

5.1.1. A4M I/O Special considerations:

The terminals on TBK5 labelled as DC digital outputs can be configured as low speed
pulse outputs as follows:

Table 7. Low speed pulse outputs

TBK5
Terminals 1 and 2 Digital output #1 OR Pulse output #3
Terminals 3 and 4 Digital output #2 OR Pulse output #4
Terminals 5 and 6 Digital output #3 OR Pulse output #5

Note: For any product or flow controlled additive meters connected to pulse inputs located
on the A4M or A4B, if digital valve control is used, the digital outputs controlling the flow
control valve must also be located on the A4M or A4B respectively.

5.2. A4B module (part of the QT and SA models only)

TB10 PT1 TB14

1 HS PRV + 1
12
11
10
9
8
7
6
5
4
3
2
1
2 HS PRV - 2
-
+
-
+
-
+
-
+
-
+
-
+
3 NC 3
4 NC 4
Pulse In #14

Pulse In #13

Pulse In #12

Pulse In #11

Pulse In #10

Pulse In #9
5 NC 5
6 NC 6
7 NC 7
8 NC 8
9 Gnd 9
10 Gnd 10

TB9 Enet
1 2
2
3 Enet
1
4
5
6 ON TB12
BIO In #1 1
7 S1 1 8
Com #1 2
8
OFF BIO Out #1 3
9
BIO In #2 4
10
Com #2 5
11
BIO Out #2 6
12
BIO In #3 7
Com #3 8
TB8
BIO Out #3 9
1
BIO In #4 10
2
Com #4 11
3
BIO Out #4 12
4
5 TB13
6 BIO In #5 1
7 Com #5 2
8 BIO Out #5 3
9 TB2 BIO In #6 4
10 Com #6 5
BIO Out #6 6
TB11
+24 VDC

BIO In #7 7
Ground

1 Com #7 8
2 BIO Out #7 9
3 BIO In #8 10
4 F1 Com #8 11
1
2

5 BIO Out #8 12

Figure 7. A4B Connections

Note: For any product or flow controlled additive meters connected to pulse inputs located
on the A4M or A4B, if digital valve control is used, the digital outputs controlling the flow
control valve must also be located on the A4M or A4B respectively.

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AccuLoad IV Installation and Maintenance Manual Wiring Connections

5.3. A4I

TB5 TB9
1 +V Out
Enet Enet
2 Inj Pulse/DC In 1 Out 1-Out 10
2 1
3 Common
4 +V Out
5 Inj Pulse/DC In 2
6 Common
7 +V Out
8 Inj Pulse/DC In 3

TB4 TB8
1 Common N/C 12
2 +V Out N/C 11
S1
3 Inj Pulse/DC In 4 Out 1 10
OFF 1 ON
4 Common Out 2 9
5 +V Out Out 3 8
6 Inj Pulse/DC In 5 Out 4 7
7 Common Out 5 6
8 +V Out Out 6 5
8
9 Inj Pulse/DC In 6 Out 7 4
10 Common Out 8 3
Out 9 2
TB3 Out 10 1
1 +V Out
2 Inj Pulse/DC In 7 TB7
3 Common Out 11 10
4 +V Out Out 12 9
5 Inj Pulse/DC In 8 Out 13 8
6 Common Out 14 7
7 +V Out Out 15 6
8 Inj Pulse/DC In 9 Out 16 5
9 Common Out 17 4
10 +V Out Out 18 3
11 Inj Pulse/DC In 10 Out 19 2
12 Common Out 20 1

TB2
1 RS485 (Rx -) CN5 Injector +V Out Selection
5 3 1
2 RS485 (Rx +)/RS232 (Rx) 1-2 24V
3 RS485 (Tx -) • • • 3-4 12V
• • •
4 RS485 (Tx +)/RS232 (Tx) 6 4 2 5-6 5V

J1
TB1 TB6
1 +24 VDC
•
F1
DC Input •
2 Gnd/RS232 Com Out 11-Out 20
Earth Ground
to Circuit Ground

Figure 8. A4I Connections

The optional A4I module provides 20 AC digital outputs and 10 inputs which can be used
for additive meter pulse inputs or general purpose DC digital inputs or pulse can interface
with up to 10 metered injectors. A maximum of two A4I modules can be connected to each
A4M and can either be mounted inside the AccuLoad enclosure or in a separate external
enclosure.

Note: For any additive meters connected to pulse inputs located on the A4I, the digital
outputs controlling the associated pump and solenoid valve must also be located on the
same A4I module.

The A4I board requires 24 VDC power and either serial or Ethernet communications
connections to the A4M to operate. Ethernet communications should be used when
possible but the serial communications option is provided to facilitate upgrades and
maintain backward compatibility.

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AccuLoad IV Installation and Maintenance Manual Wiring Connections

There are jumpers on the A4I board which allow customization as follows:
• If the A4I will be connected to additive meters for which the transmitters require
DC power, the voltage select jumpers (see table) are used to set the meter power
supply voltage to 5, 12 or 24 VDC

Table 8. A4I jumper settings

Transmitter Power
Designation Jumpers Description
5V 1–2 24V – +V Out
12V 3–4 12V – +V Out
24V 5–6 5V – +V Out

Table 9. A4I switch settings

A4M Switch Settings

S1-1 Factory Use
S1-2 OFF = Address 100 ON = Address 200
S1-3 OFF = Band 9600 ON = Band 38,400
S1-4 OFF = RS 232 ON = RS 485
S1-5 OFF = Address 100 ON = Address 200
S1-6 Reserved
S1-7 Model SA Board Set Selector - see section 6, Off for all other models
S1-8 Model SA Board Set Selector - see section 6, Off for all other models

Page 24 • MN06201 ║ Issue/Rev. 0.1 (2/20)

AccuLoad IV Installation and Maintenance Manual Electronic Module Layouts

6 – Electronic Module Layouts

The location of the parts on each of the electronic assemblies is shown in the
following figures:

6.1. A4M Board

The replaceable parts on the A4M board are the fuse, AC Digital output relays,
Analog I/O modules. Refer to parts list PO06200 for details.

Analog I/O Modules

ETH3 ETH2
ACIM1

1
ACIM2
AM1 AM2 AM3 AM4 AM5 AM6 1
ETH4 ETH1
ACIM3

TBE2
ACIM4
TBE5

CN7
1 1
Ethernet Connections 6
ACIM5
PT2

CN6 S2 U22
U41
AC Digital
PT1

LMOD1

Output Relays
18 U29 U38 P4

1 SSR1 1
S1 P3
12
SSR2
1
CN1
TBE6

SW2 U28 SSR3

TBE3
TBK1

CN9
SSR4

10
See Below for CN4 U1 U8
U4 P1
Switch Settings L1 U7
U10
SSR5
1 10 12
U11 SSR6
1 P2
U3
U9
CN5 U5 SSR7 1
U17 SW1 U2
TBK4

1 SSR8
TBE4

TBE7
CN8
TBK2

SSR9
10
C119
SSR10
1
8
10
C94 D11
1 T1 SSR11
TBK5

16 HS1

Supply Fuse
TBK3

TBE1
1 3
C95
8 5

Figure 9. A4M Board Layout

Table 10. A4M switch settings

A4M Switch Settings

S1-1 Factory Use
S1-2 Factory Use
S1-3 Reserved
S1-4 Reserved
S1-5 Reserved
S1-6 Reserved
S1-7 Model SA Board Set Selector - see section 10. Off for all other models
S1-8 Model SA Board Set Selector - see section 10. Off for all other models

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AccuLoad IV Installation and Maintenance Manual Electronic Module Layouts

For the ST, QT and N4 models, all four switches in SW2 should be in the OFF position
during normal operation. For the SA model, SW2-3 and SW2-4 are used to select the
board set with which this A4M is associated (For SA model see section 10 for more information) .
There are special functions which can be activated on all of the AccuLoad models when
SW2-1 is set to ON. To activate the special functions, remove power from the AccuLoad,
set the switches to select the desired special function and then apply power to the module.
Once the special function is complete, all switches should be set to OFF for the ST, QT
and N4 models. For the AccuLoad SA, SW2-1 and SW2-2 should be set to OFF and,
SW2-3 / SW2-4 should be set according to the board set.

Table 11. AccuLoad SA, SW2-1, and SW2-2 settings

SW2-1 SW2-2 SW2-3 SW2-4

0 0 0 0 Normal operation for model ST, QT, N4 and SA board set A
0 0 0 1 Normal operation for model SA board set B
0 0 1 0 Normal operation for model SA board set C
0 0 1 1 Normal operation for model SA board set D
0 1 0 0 Reserved
0 1 0 1 Reserved
0 1 1 0 Reserved
0 1 1 1 Reserved
1 0 0 0 Force default IP address - 192.168.0.1
1 0 0 1 Erase configuration database
1 0 1 0 Erase all databases (configuration, transaction, event, driver)
1 0 1 1 Clear Security Passcodes
1 1 0 0 Force Touch Panel Recalibration
1 1 0 1 Reserved
1 1 1 0 Reserved
1 1 1 1 Reserved

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AccuLoad IV Installation and Maintenance Manual Electronic Module Layouts

6.2. A4B Board

The replaceable parts on the A4B board are the power fuse and AC Digital output relays.
Refer to parts list for details.

LMOD1 U7
1 12
PT1

1
SSR1 U15 U13 U12 U11 U10 U9

SSR2
CN1

TB14
TB10
SSR3
P2
U14
SSR4

SSR5

10
SSR6

ETH2
1

SSR7
U3 Ethernet
U20
SSR8 Connections

ETH1
S1
TB9

SSR9 S1
See A4B Switch
Settings Table
SSR10

1
SSR11 CN2
U24
12

SSR12 U4
1

S2 CN3

TB12
SSR13 U28

SSR14
U30
TB8

U33
SSR15

12
SSR16 U37

Analog Digital
10

1
Output Relays
U25
1

ACIM1 TB13

U29
TB11

ACIM2
U34
5

ACIM3
12

U38
TB2
1 2
ACIM4
C14

Power Fuse

Figure 10. A4B Board Layout

Table 12. A4B switch settings

A4B Switch Settings

S1-1 Factory Use
S1-2 Reserved
S1-3 Reserved
S1-4 Reserved
S1-5 Reserved
S1-6 Reserved
S1-7 Model SA Board Set Selector - for SA model see section 10, Off for all other models
S1-8 Model SA Board Set Selector - for SA model see section 10, Off for all other models

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AccuLoad IV Installation and Maintenance Manual Electronic Module Layouts

6.3. A4I Board

The replaceable parts on the A4I board are the power fuse and AC Digital output relays.
Refer to parts list for details.
Ethernet Connections

CN1 LMOD1

ETH2 ETH1

TB9
CN3

TB5
U10 U11 U9 CN2
AC Digital
Output Relays
SSR1
U22

SSR2

See table 13 P1
SSR3
S1
for Switch U5
Settings

TB8
SSR4
TB4

SSR5
U4

SSR6

P8 SSR7
S2

SSR8
U27
SSR9

SSR10
TB3

SSR11

SSR12

SSR13
TB7

SSR14

SSR15

SSR16
TB2

12V
24V
5V

Power
SSR17
Fuse
TB6

SSR18
F1
TB1

C5
C14 SSR19

D3 SSR20

Figure 11. A4I Board Layout

Table 13. A4I switch settings

A4I Switch Settings

S1-1 Factory Use - Always OFF
S1-2 Module Address - Off =100, On = 200
S1-3 Serial Baud Rate - Off = 9600, On = 38400
S1-4 Serial Mode - Off = RS232, On = RS485
S1-5 Serial Termination resistors - Off = Disable, On = Enable
S1-6 Reserved
S1-7 Model SA Board Set Selector - for SA model see section 10. Off for all other models
S1-8 Model SA Board Set Selector - for SA model see section 10. Off for all other models

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AccuLoad IV Installation and Maintenance Manual General Wiring Notes

7 – General Wiring Notes

7.1. AC Input Power

There are two AC power inputs to the AccuLoad A4M board. The first is the instrument
power which powers the AccuLoad electronics and is connected to the A4M at TB1 (see
figure 9). The instrument power should be “clean” and must meet the requirements
listed in the specification SS06200. The second AC power input to the AccuLoad is used to
drive external AC equipment such as solenoids and therefore will be “noisier” so it should
be supplied to the AccuLoad by a separate circuit from the power panel.

Field I/O
Power Power
Distribution AccuLoad
Panel
Instrument
Power TB1

Separate
Curcuits

Figure 12. AC power inputs to AccuLoad A4M board

Terminal Board Key

Figure 13. Example of the AC wiring of a typical AccuLoad

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AccuLoad IV Installation and Maintenance Manual General Wiring Notes

7.2. DC Instrument Power

The AC instrument power is connected to the A4M module which produces 24 VDC power
for the standard (THMI, A4B) modules in the AccuLoad. The A4M DC power supply is
also capable of supplying up to a maximum of 1 amp of regulated DC power which can
be used to power optional A4I modules, card readers and meter pulse transmitters and
other external DC circuits.

A4M Module

TBE4
Factory wired to
AccuLoad internal
9 modules
10
+24 VDC 11
12 To meter transmitters,
13 remote A4I etc.
DC GND 14
15
16 Factory wired to
AccuLoad internal
modules

Figure 14. DC power wiring on ST, QT and N4 models

7.3. Grounding

The AccuLoad must be properly grounded to ensure safe and reliable operation.

The AccuLoad requires a single point earth ground dedicated to the AccuLoad pro-
vided by a ground rod. There must be less than 2 Ohms between the ground lug of the
AccuLoad enclosure and the ground rod.

Any ground wires and/or shields in the cables connected to devices external to the
AccuLoad such as printers, analog sensors etc. should only be connected to TBE4
terminals 13, 14 or 15 at the AccuLoad end of the cable. It is very important to ensure
this is the only ground point.

7.4. Meter Pulses

The AccuLoad counts pulses from the meter(s) to determine the amount of volume or
mass that has flowed through the meter. The AccuLoad can be configured to receive
pulses in one of three modes:
• Single Channel – One pulse input receives a single stream of pulses from the meter.
• Dual Channel – Two pulse inputs receive two separate pulse streams from the meter.
This allows the AccuLoad to detect meter connection problems with one of the
channels and post an alarm. Also, this allows the AccuLoad to determine the
direction of flow through the meter.

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AccuLoad IV Installation and Maintenance Manual General Wiring Notes

• Dual Channel with Integrity – Four pulse inputs receive two pulses streams and
two inverted pulse streams from the meter. This allows the AccuLoad to detect the
direction of flow and meter connection problems including the case where both
pulse streams are inactive.

Regardless of the mode selected, to qualify as a valid pulse, the signal on the input to
the AccuLoad must be less than one volt for a minimum of 80 microseconds and then
transition to greater than 5 volts and remain above 5 volts for a minimum of 80 micro-
seconds as shown below.

Figure 15. Meter pulse requirements

7.5. Analog I/O Modules

The A4M board has six slots into which modules can be inserted to interface to analog
sensors or actuators (ie. Pressure sensor, valve). Typically, these modules are installed
at the factory according to the requirements of the installation but changes and
replacements of these modules may be done in the field. The analog I/O points are fully
configurable and can be inputs such as temperature or pressure or outputs such as analog
valve control. There are 5 different types of analog interface modules available which are
inserted into a socket on the A4M board as follows:
Table 14. Types of analog I/O modules

Analog Module Type Electrical Connection Function(s)

RTD Four-wire 100 ohm RTD Temperature input
CRI 4-20 mA Input Temperature
Pressure
Density
General Purpose Input
CRO 4-20 mA Output Analog valve control
Flow rate output
General Purpose Output
VTI 1-5 VDC Input Temperature
Pressure
Density
General Purpose Input
VTO 1-5 VDC Output Analog valve control
Flow rate output
General Purpose Output

Issue/Rev. 0.1 (2/20) ║ MN06201 • Page 31

AccuLoad IV Installation and Maintenance Manual General Wiring Notes

Sockets Analog Module

AM 1
Set Cal 1 and Cal 2
Mounting Screw parameters to these
Alignment Pins
values in AccuLoad
Side View Top View analog configuration

Figure 15. Analog I/O Modules

Caution – Before inserting or removing any analog module be sure to de-energize

all associated circuits and use proper ESD protection.

To remove a module, loosen the captive retaining screw and pull the module out of the
socket gently while rocking the module slightly. Insert a module by lining up the pins
with the socket holes, pushing the module in until it seats against the circuit board and
then tightening the retaining screw.

During initial installation and anytime a module is installed, the two calibration numbers
(Cal. 1 and Cal. 2) written on the top of the module should be entered into the program-
ming of the AccuLoad to ensure optimum accuracy.

Figure 16. Cal. 1 and Cal. 2 calibration numbers in AccuMate

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AccuLoad IV Installation and Maintenance Manual Typical Wiring Examples

8 – Typical Wiring Examples

8.1. Communications - Ethernet

The recommended networking strategy is to place the AccuLoad on a segmented

network which isolates the industrial control network traffic from the broader general
purpose network traffic associated with corporate LANs and the internet. This strategy
enhances the security and the throughput on the critical control portion of the network.
The following figure illustrates the general approach.
Note: if the AccuLoad IV must be installed on a class 'A' network directly, the AccuLoad's
internal addressing scheme must be changed to avoid address conflicts. See section
8.1.1. for instructions.

AccuLoad

Process Database Data Historian AccuLoad

Firewall Firewall

Automation Server
Corporate
LAN

PLC

Internet Industrial Control

Network

Figure 17. Recommended network strategy

8.1.1. How to Change the AccuLoad IV Internal IP Address

From the Accuload IV Ready Screen, Press Main in the top left corner. From there
navigate to “Program Mode/System/Communications/Host Interface”. Scroll to the
bottom of the page where the parameters for Internal IP Address and THMI IP Address
are listed.

Issue/Rev. 0.1 (2/20) ║ MN06201 • Page 33

AccuLoad IV Installation and Maintenance Manual Typical Wiring Examples

Change the parameters to the desired IP addresses then press Program Mode at the
top of the screen. Example: 192.168.1.1 & 192.168.1.6 respectively.

Once at the Program Mode menu, press Save and Exit. A Critical Errors screen will
appear. Choose Logout with warnings.

Page 34 • MN06201 ║ Issue/Rev. 0.1 (2/20)

AccuLoad IV Installation and Maintenance Manual Typical Wiring Examples

Once this is done, you will be brought back to the Main Menu. Press Device Settings.

Then choose MMI Settings. The screen will turn white for a moment.

Issue/Rev. 0.1 (2/20) ║ MN06201 • Page 35

AccuLoad IV Installation and Maintenance Manual Typical Wiring Examples

Choose Configuration.

Choose Configuration.

Enter the Level 4 pin. (Default: 4444)

Page 36 • MN06201 ║ Issue/Rev. 0.1 (2/20)

AccuLoad IV Installation and Maintenance Manual Typical Wiring Examples

Select Network Settings.

This section will display the current IP address of the THMI and programmed gateway.

Issue/Rev. 0.1 (2/20) ║ MN06201 • Page 37

AccuLoad IV Installation and Maintenance Manual Typical Wiring Examples

Change them to the desired new IP settings like the example below. Use the new
Accuload IV IP address as the Gateway. Once completed, press the green check mark.

You will then be returned to this screen. Press Connections.

Page 38 • MN06201 ║ Issue/Rev. 0.1 (2/20)

AccuLoad IV Installation and Maintenance Manual Typical Wiring Examples

Select Primary URL.

Change the Primary URL to reflect the new AccuLoad IV IP address preserving all other
content in the Primary URL. Then press the back arrow in the top right corner of the
screen to ensure all settings have saved.

Once these steps are completed, power down the entire AccuLoad IV for one minute
and re-apply power. The new IP settings should take effect.

8.2. Communications - Serial

The AccuLoad provides 4 serial ports as follows:

Table 15. Serial comm ports

Comm Port Name Terminal Locations Description

Comm 1 A4M-TBK1 RS-232 or RS-485 with flow control
Comm 2 A4M-TBK2 RS-232 or RS-485
Comm 3 A4M-TBK3 RS-485 only
Comm 4 A4M-TBE4 RS-232 only

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AccuLoad IV Installation and Maintenance Manual Typical Wiring Examples

AccuLoad External Device

Tx+ Rx+
Rx+ Tx+
Tx- Rx-
Rx- Tx-

AccuLoad

Tx+
Rx+
Tx-
Rx-

Figure 18. 4 Wire RS485 Serial Wiring

AccuLoad A4I or
Rx+ AccuLoad – Comm 1, external device
Tx+ 2 or 3
Rx- A4I-TB2
Tx-
Tx+ 1 Rx+
Tx- 2 Rx-
Rx+ 3 Tx+
Rx- 4 Tx-
Tx+
Rx+
Tx-
Rx-

Figure 19. 2 Wire RS485 Serial Wiring

AccuLoad – Comm
External RS-232
1,2,3 or 4
device

Tx Rx
Rx Tx
Gnd Gnd

Figure 20. RS232 Serial Wiring

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AccuLoad IV Installation and Maintenance Manual Typical Wiring Examples

External RS-232 External RS-232

device device

AccuLoad – R T G R T G
Comm 1,2,3 or 4 x x n x x n
d d

Tx
Rx
Gnd

Figure 21. MultiDrop RS232 Serial Wiring

8.3. AC Digital Input

AccuLoad External AC Wiring
AC

TBE2
1 (L2)AC in
AC Common
L2
AC
2
In #7 (AC) AC supply
3
AC
In #8 (AC) L1
AC 4
In #9 (AC)

5
In #10 (AC)
AC
6
AC In #11 (AC)

AC

AC

AC

Figure 22. AC digital input

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AccuLoad IV Installation and Maintenance Manual Typical Wiring Examples

8.4. AC Digital Output

AccuLoad
External AC Wiring
L1 AC

External DC actuated
device (i.e. Valve)

L1 AC

Figure 23. AC digital output

8.5. DC Digital Output

AccuLoad

External DC Wiring
+24 VDC from A4M
TBE4 - 10, 11 or 12

DC Output +

External DC actuated
device (i.e. Valve)
DC Output -

DC Ground from A4M

TBE4 - 13, 14 or 15

Figure 24. AC digital output

8.6. DC Digital Input

AccuLoad
External DC Wiring
+24 VDC from A4M
TBE4 - 10, 11 or 12

DC Input+

DC Input -

DC Ground from A4M

TBE4 - 13, 14 or 15

Figure 25. Digital input

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AccuLoad IV Installation and Maintenance Manual Typical Wiring Examples

8.7. RTD Temperature Probe analog input wiring

AccuLoad
External RTD Wiring

RTD+ 1 Red

SIG + 2 Red
SIG - Black
3
RTD - Black
4

A4M-TBE6 -
13, 14 or 15

Figure 26. Analog inputs

8.8. 4-20mA analog input wiring

AccuLoad –
A4M - TBE5
RTD +
SIG X +
SIG X-
RTD - GND
4-20mA
Ground (TBE4) Transmitting Device

Figure 27. Active 4-20mA Inputs

AccuLoad –
A4M - TBE5 External
RTD + Power
SIG X +
SIG X-
RTD - GND
4-20mA
Ground (TBE4) Transmitting Device

Figure 28. Passive 4-20mA Inputs

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AccuLoad IV Installation and Maintenance Manual Typical Wiring Examples

8.9. Analog Output

AccuLoad – A4M
TBE5
RTD + No Connection
SIG X +
SIG X -
RTD - No Connection
4-20mA
Ground (TBE4)
Receiving Device

Figure 29. Analog outputs

8.10. Meter Pulses (Product or Additive Meters)

AccuLoad A4M / A4B

External Meter
Pulse Wiring
+24 VDC from A4M
TBE4 - 10, 11 or 12

Pulse Input+

Open collector
meter output

Pulse Input

DC Ground from A4M

TBE4 - 13, 14 or 15

Figure 30. External counter wiring

See A4M Board Layout terminals (section 6.1) for meter pulse input terminal locations.

Note: For pulse transmitters requiring 12 VDC (i.e. GPST), install the P2412 converter.
See the P2412 Converter manual MN06117 for details.

8.11. Pulse Outputs

The AccuLoad can be configured to provide up to 5 pulse outputs as follows:

Table 16. 5 pulse output configurations for the AccuLoad

Pulse Output 1 and 2 Frequency range – 0 – 3000 Hz

Open collector connection
Terminals A4M-TBK4 7 & 8 and A4M-TBK5 7 & 8 (Dedicated)
Pulse Output 3, 4 and 5 Frequency range 0 – 125 Hz
Digital Output connection
Terminals A4M-TBK5 1 – 6. (Shared with DC Outputs 1 – 3)

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AccuLoad IV Installation and Maintenance Manual Typical Wiring Examples

8.12. High speed prover output wiring

AccuLoad A4I
External DC
+5, 12 or 24 VDC V+ Output Signal Wiring

Internal Pull Up 12 VDC Contact closure for DC

input signal to A4I

Common

Figure 31. High speed prover output wiring

8.13. Additive Meters / Digital Inputs

The A4I module provides 10 inputs which can be used for either additive meter pulse
inputs or as DC digital inputs and 20 AC digital outputs. The AC digital outputs are wired
using the same method shown for the A4M/A4B above. However, the meter pulse/DC
digital inputs are wired differently on the A4I versus the A4M/A4B as illustrated in the
following diagrams.

Note: The A4I module provides outputs to supply power to the additive meter. The
voltage supplied is selectable (5, 12 or 24 VDC) using jumpers on the module.

AccuLoad
External Prover
+24 VDC from A4M Pulse Counter
TBE4 - 10, 11 or 12

TB-E6-1

TB-E6-2 Power Counter

High Speed Pulse Output

DC Ground from A4M

TBE4 - 13, 14 or 15

Figure 32. A4I additive meter wiring

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AccuLoad IV Installation and Maintenance Manual Typical Wiring Examples

AccuLoad A4I
External Meter

+5, 12 or 24 VDC V+ Output Pulse Wiring

Monoblock transmitter
Internal Pull Up 12 VDC

V+ Supply

Signal Input Signal

Common Common

Figure 33. A4I digital input wiring

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AccuLoad IV Installation and Maintenance Manual Input and Output Details

9 – Input and Output Details

I/O Index Numbering

9.1.

When programming the AccuLoad the I/O points are referred to by the index number.

9.1.1. A4M

Table 17. A4M I/O index numbering

Terminals Type of I/O AccuLoad Configuration

Index Number
A4M
TBK1 Serial Comm port RS232/485 Comm 1
TBK2 Serial Comm port RS232/485 Comm 2
TBK3 Serial Comm port RS485 Comm 3
TBK4 DC Digital Input Digital Input 1 thru 3
TBK4 Pulse output Pulse output 1
TBK5 DC Digital Output Digital Outputs 1 thru 3 OR
Pulse outputs 3 thru 5
TBK5 Pulse output Pulse output 2
TBE1 AC power input (115 – 230) NA
TBE2 AC Digital Input Digital inputs 7 thru 11
TBE3 AC Digital Output Digital Outputs 4 thru 9
TBE4 Serial Comm port RS232 Comm 4
TBE4 DC Digital Input Digital Inputs 4 thru 6
TBE4 24 VDC power – 1 Amp max. NA
TBE4 DC electronic ground NA
TBE5 Analog Input/Output Analog I/O 1 thru 6
TBE6 High Speed prover pulse NA
output
TBE6 Analog Input/Output Analog I/O 4 thru 6
TBE7 AC Digital Outputs Digital Outputs 10 thru 14
PT 1 Meter Pulse Inputs Pulse inputs 1 - 6
PT 2 Meter Pulse Inputs Pulse Inputs 7 - 8

9.1.2. A4B
Table 18. A4B I/O index numbering

Terminals Type of I/O AccuLoad Configuration

Index Number
A4B - Available on models QT and SA only
TB 8 AC Digital Outputs Digital outputs 26 - 30
TB 9 AC Digital Outputs Digital outputs 20 - 25
TB 10 AC Digital Outputs Digital outputs 15 - 19
TB 11 AC Digital Inputs Digital inputs 12 - 15
TB 12 DC Digital Input OR Output Digital Inputs 16 - 19 OR
Digital Outputs 31 - 34
TB 13 DC Digital Input OR Output Digital Inputs 20 - 23 OR
Digital Outputs 35 - 38
PT 1 Meter Pulse Inputs Meter Pulse Inputs 9 - 14

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AccuLoad IV Installation and Maintenance Manual Input and Output Details

9.1.3. A4I

Table 19. A4I – 1 I/O index numbering

Terminal Block Type of I/O AccuLoad Configuration Index Number

A4I – 1 (Optional)
TB3 Injector Pulse OR Inj 11 in OR DC In 30 – Pin 2
Digital Input Inj 12 in OR DC In 31 – Pin 5
Inj 13 in OR DC In 32 – Pin 8
Inj 14 in OR DC In 33 – Pin 11
TB4 Serial Comm port RS232/485 Inj 8 in OR DC In 27 – Pin 3
Inj 9 in OR DC In 28 – Pin 6
Inj 10 in OR DC In 29 – Pin 9
TB5 Serial Comm port RS485 Inj 5 in OR DC In 24 – Pin 2
Inj 6 in OR DC In 25 – Pin 5
Inj 7 in OR DC In 26 – Pin 8
TB7 AC Digital Outputs AC Out 49 – Pin 10
AC Out 50 – Pin 9
AC Out 51 – Pin 8
AC Out 52 – Pin 7
AC Out 53 – Pin 6
AC Out 54 – Pin 5
AC Out 55 – Pin 4
AC Out 56 – Pin 3
AC Out 57 – Pin 2
AC Out 58 – Pin 1
TB8 AC Digital Outputs AC Out 39 – Pin 10
AC Out 40 – Pin 9
AC Out 41 – Pin 8
AC Out 42 – Pin 7
AC Out 43 – Pin 6
AC Out 44 – Pin 5
AC Out 45 – Pin 4
AC Out 46 – Pin 3
AC Out 47 – Pin 2
AC Out 48 – Pin 1

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AccuLoad IV Installation and Maintenance Manual Input and Output Details

Table 20. A4I – 2 I/O index numbering

Terminal Block Type of I/O AccuLoad Configuration Index Number

A4I – 2 (Optional)
TB3 Injector Pulse OR Inj 21 in OR DC In 40 – Pin 2
Digital Input Inj 22 in OR DC In 41 – Pin 5
Inj 23 in OR DC In 42 – Pin 8
Inj 24 in OR DC In 43 – Pin 11
TB4 Serial Comm port RS232/485 Inj 18 in OR DC In 37 – Pin 3
Inj 19 in OR DC In 38 – Pin 6
Inj 20 in OR DC In 39 – Pin 9
TB5 Serial Comm port RS485 Inj 15 in OR DC In 34 – Pin 2
Inj 16 in OR DC In 35 – Pin 5
Inj 17 in OR DC In 36 – Pin 8
TB7 AC Digital Outputs AC Out 69 – Pin 10
AC Out 70 – Pin 9
AC Out 71 – Pin 8
AC Out 72 – Pin 7
AC Out 73 – Pin 6
AC Out 74 – Pin 5
AC Out 75 – Pin 4
AC Out 76 – Pin 3
AC Out 77 – Pin 2
AC Out 78 – Pin 1
TB8 AC Digital Outputs AC Out 59 – Pin 10
AC Out 60 – Pin 9
AC Out 61 – Pin 8
AC Out 62 – Pin 7
AC Out 63 – Pin 6
AC Out 64 – Pin 5
AC Out 65 – Pin 4
AC Out 66 – Pin 3
AC Out 67 – Pin 2
AC Out 68 – Pin 1

From the factory, none of the AccuLoad I/O connections or functions are defined. De-
pending on the equipment at the facility and operations to be performed, the user must
configure the AccuLoad I/O points accordingly. For example, if a digital flow control valve
is to be interfaced to the AccuLoad as part of a load rack installation, the AccuLoad must
be configured with digital outputs for the upstream and downstream solenoids. The user
must assign the upstream solenoid function to one of the digital outputs to be used for
the solenoid control and then do the same for the downstream solenoids.

The only I/O points that are automatically assigned by the AccuLoad are the meter
pulse inputs (product meters and additive meters). The AccuLoad assigns the pulse
inputs based on the number of meters and injectors defined in the configuration. The
pulse input assignments for various meter configurations are listed in Table 28 (Section
9.3.1). Any pulse input which is not automatically assigned a function by the AccuLoad
is available for user selectable functions.

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AccuLoad IV Installation and Maintenance Manual Input and Output Details

9.2. Meter Connection Details

9.2.1. Prime 4

Table 21. Prime 4 Connections

AccuLoad Connections Prime 4 Connections

Pulse Input A Plus White (Signal A Output)
Pulse Input B Plus Yellow (Signal B Output) – No connection for single
(dual pulse only) channel meters.
Pulse Input A and B Minus
connect to DC Ground
+ 24 VDC Red (Input Power)
DC Ground Black (Common)

9.2.2. Genesis
Table 22. Genesis connections

AccuLoad Connections Genesis Connections

Pulse Input A Plus Terminal 2 (Signal A Output)
Pulse Input B Plus Terminal 3 (Signal B output) Not used for single channel
(dual pulse only) connection

Pulse Input A and B Minus

connect to DC Ground
+ 24 VDC Terminal 1 (Input power)
DC Ground Terminal 4 (Electronics ground)
Terminals 5 – 8 are not used

9.2.3. UPT Transmitter

Table 23. UPT Connections

AccuLoad Connections UPT Connections

Pulse Input A Plus Terminal 5 (Signal A Output)
Pulse Input B Plus Terminal 3 (Signal B output) Not used for single channel
(dual pulse only) connection
Pulse Input A and B Minus
connect to DC Ground
+ 24 VDC Terminal 2 (Input power)
DC Ground Terminal 1 (Electronics ground)
Pulse Input A Integrity Plus Terminals 6 (Signal A Integrity Output) Not used for
non-integrity connection.
Pulse Input B Integrity Plus Terminals 4 (Signal A Integrity Output) Not used for
non-integrity connection.
Terminal 7 (Shield) – no connection
Terminal 8 (Verification pulse output)
Connect to optional verification device
Terminal 9 (Inverted verification pulse output)
Connect to optional verification device
Terminal 10 – No connection

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AccuLoad IV Installation and Maintenance Manual Input and Output Details

9.2.4. PPS Transmitter

Table 24. UPT Connections

AccuLoad Connections PPS Connections

Pulse Input A Plus Terminal 5 (Signal A Output)
Pulse Input B Plus Terminal 3 (Signal B output) Not used for single channel
(dual pulse only) connection

Pulse Input A and B Minus

connect to DC Ground
+ 24 VDC Terminal 2 (Input power)
DC Ground Terminal 1 (Common)
Pulse Input A Integrity Plus Terminals 6 (Signal A Integrity Output) Not used for
non-integrity connection.
Pulse Input B Integrity Plus Terminals 4 (Signal A Integrity Output) Not used for non
integrity connection.

9.2.5. PA-6 Preamp

Table 25. PA-6 Connectins

AccuLoad Connections PA-6 Connections

Pulse Input A Plus Terminal 3 (Signal A output)
Pulse Input Minus – DC
Ground
+ 24 VDC Red (Input power)
DC Ground White (Common)

For dual pulse turbine meter connection, there is one PA-6 Preamp on Boss #1 and a
second PA-6 Preamp on Boss #2. For this case, the wiring to the B pulse input of the
AccuLoad is done the same as the wiring to the A pulse input shown above.

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AccuLoad IV Installation and Maintenance Manual Input and Output Details

9.2.6. Promass 80, 83, and 84 Coriolis Meters

Table 26. Promass Single Channel Connection

AccuLoad Connections Promass 80, 83, and 84

Pulse Input A Plus +24 VDC
Pulse Input A Minus Terminal 24 (Signal A Output) for Promass output options
Model 80 - A, D, S and T
Model 83 - A, B, S, T, C, D, 2, 4 and 5
Model 84 - S, T, D and 2
Terminal 22 (Signal A Output) for Promass output options
Model 80 – 8
Model 83 – N and P
Model 84 – N
Note: The Promass output option is defined by the last character
of the Promass model code
DC Ground Terminal 25 (Signal A Negative) for Promass output options
Model 80 - A, D, S and T
Model 83 - A, B, S, T, C, D, 2, 4 and 5
Model 84 - S, T, D and 2
Terminal 23 (Signal A Ground) for Promass output options
Model 80 – 8
Model 83 – N and P
Model 84 – N
Note: The Promass output option is defined by the last character
of the Promass model code

9.2.7. Promass 83 and 84 Coriolis Meters

Table 27. Promass Dual Channel Connection

AccuLoad Connections Promass 83, and 84

Pulse Input A Plus +24 VDC
Pulse Input A Minus Promass Terminal 24 (Signal A Output) for Promass output options
Model 83 - M
Model 84 - M and 1
Note: The Promass output option is defined by the last character
of the Promass model code
AccuLoad DC Ground Promass Terminal 25 (Signal A Negative) for Promass output options
Model 83 - M
Model 84 - M and 1

Pulse Input B Plus +24 VDC

Pulse Input B Minus Promass Terminal 22 (Signal B Output) for Promass output options
Model 83 - M
Model 84 - M and 1
Note: The Promass output option is defined by the last character
of the Promass model code
DC Ground Promass Terminal 23 (Signal A Negative) for Promass output options
Model 83 - M
Model 84 - M and 1
Note: The Promass output option is defined by the last character
of the Promass model code

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AccuLoad IV Installation and Maintenance Manual Input and Output Details

Note: When connecting the Promass 84 (does not apply to the Promass 80 or 83 mod-
els) to an AccuLoad, it is important that the “Line Monitoring” function on the Promass
84 be disabled. This is because the pulse input circuitry of the AccuLoad requires the
input pulse “off” voltage to be less than one volt (and the “on” voltage to be greater than
5 volts). If the “Line Monitoring” on the Promass 84 is enabled, the “off” voltage of the
pulses will be greater than one volt and therefore will not be counted by the AccuLoad.
There are three jumpers on each of the frequency output submodules on the I/O board
that enable/disable the “Line Monitoring” function. The factory default is to enable “Line
Monitoring”. Follow the steps from section 6.4.2 of the Proline Promass 84 Operating
Instruction – Bulletin MN0M032 to enable/disable this function.

9.3. Meter Input Wiring Matrix

The AccuLoad totalizes volume or mass in response to pulses received at the pulse
input terminals of the A4M, A4B or A4I modules. Which pulse input connections to use
for each meter is dependent on the configuration of the AccuLoad. For product meters,
the AccuLoad automatically assigns the pulse inputs based on the products defined in
the configuration database. The number of pulse inputs required for each meter varies
based on the type of meter specified in the configuration database.

Single Channel meter - One pulse input per meter

Dual Channel meter - Two pulse inputs per meter
Dual Channel meter with Integrity - Four pulse inputs per meter

The following tables show the pulse input assignments made by the AccuLoad for each
of the possible number of product meters. Any pulse inputs which are not required for
connection of the product meters is available to be configured for use as an additive
meter or pulse densitometer.

Notes:

Differences between the AccuLoad III and AccuLoad IV connections are shown BOLD
and colored green.

Pgm – Indicates a pulse input which is programmable to function as a metered injector

or densitometer pulse input.

Example product meter naming convention:

M4A – Meter 4 channel A

M5B – Meter 5 channel B integrity – In AccuLoad IV, the valve control solenoid outputs
or metered injector solenoid outputs must be configured/landed on the same board as
the associated meter pulse input.

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AccuLoad IV Installation and Maintenance Manual Input and Output Details

9.3.1. AccuLoad IV - Models QT and SA Meter Inputs

Table 28. 6 Product Meters (AccuLoad IV-QT and SA Hardware)

6 Product Meters (AccuLoad IV-QT and SA Hardware)

In #1 In #2 In #3 In #4 In #5 In #6 In #7 In #8
Single Pulse M1A M2A M3A Pgm Pgm Pgm Pgm Pgm
Dual Pulse M1A M1B M2A M2B M3A M3B Pgm Pgm
Dual/Integrity N/A N/A N/A N/A N/A N/A N/A N/A
In #9 In #10 In #11 In #12 In #13 In #14
Single Pulse M4A M5A M6A Pgm Pgm Pgm
Dual Pulse M4A M4B M5A M5B M6A M6B
Dual/Integrity N/A N/A N/A N/A N/A N/A

Table 29. 5 Product Meters (AccuLoad IV-QT and SA Hardware)

5 Product Meters (AccuLoad IV-QT and SA Hardware)

In #1 In #2 In #3 In #4 In #5 In #6 In #7 In #8
Single Pulse M1A M2A M3A Pgm Pgm Pgm Pgm Pgm
Dual Pulse M1A M1B M2A M2B M3A M3B Pgm Pgm
Dual/Integrity N/A N/A N/A N/A N/A N/A N/A N/A
In #9 In #10 In #11 In #12 In #13 In #14
Single Pulse M4A M5A M6A Pgm Pgm Pgm
Dual Pulse M4A M4B M5A M5B Pgm Pgm
Dual/Integrity N/A N/A N/A N/A N/A N/A

Table 30. 4 Product Meters (AccuLoad IV-QT and SA Hardware)

4 Product Meters (AccuLoad IV-QT and SA Hardware)

In #1 In #2 In #3 In #4 In #5 In #6 In #7 In #8
Single Pulse M1A M2A Pgm Pgm Pgm Pgm Pgm Pgm
Dual Pulse M1A M1B M2A M2B Pgm Pgm Pgm Pgm
Dual/Integrity N/A N/A N/A N/A N/A N/A N/A N/A
In #9 In #10 In #11 In #12 In #13 In #14
Single Pulse M3A M4A Pgm Pgm Pgm Pgm
Dual Pulse M3A M3B M4A M4B Pgm Pgm
Dual/Integrity N/A N/A N/A N/A N/A N/A

Table 31. 3 Product Meters (AccuLoad IV-QT and SA Hardware)

3 Product Meters (AccuLoad IV-QT and SA Hardware)

In #1 In #2 In #3 In #4 In #5 In #6 In #7 In #8
Single Pulse M1A M2A Pgm Pgm Pgm Pgm Pgm Pgm
Dual Pulse M1A M1B M2A M2B Pgm Pgm Pgm Pgm
Dual/Integrity M1A M1B M1Ā M1B M2A M2B M2Ā M2B
In #9 In #10 In #11 In #12 In #13 In #14
Single Pulse M3A Pgm Pgm Pgm Pgm Pgm
Dual Pulse M3A M3B Pgm Pgm Pgm Pgm
Dual/Integrity M3A M3B M3Ā M3B Pgm Pgm

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AccuLoad IV Installation and Maintenance Manual Input and Output Details

Table 32. 2 Product Meters (AccuLoad IV-QT and SA Hardware)

2 Product Meters (AccuLoad IV-QT and SA Hardware)

In #1 In #2 In #3 In #4 In #5 In #6 In #7 In #8
Single Pulse M1A M2A Pgm Pgm Pgm Pgm Pgm Pgm
Dual Pulse M1A M1B M2A M2B Pgm Pgm Pgm Pgm
Dual/Integrity M1A M1B M1Ā M1B M2A M2B M2Ā M2B
In #9 In #10 In #11 In #12 In #13 In #14
Single Pulse Pgm Pgm Pgm Pgm Pgm Pgm
Dual Pulse Pgm Pgm Pgm Pgm Pgm Pgm
Dual/Integrity Pgm Pgm Pgm Pgm Pgm Pgm

Table 33. 1 Product Meters (AccuLoad IV-QT and SA Hardware)

1 Product Meters (AccuLoad IV-QT and SA Hardware)

In #1 In #2 In #3 In #4 In #5 In #6 In #7 In #8
Single Pulse M1A Pgm Pgm Pgm Pgm Pgm Pgm Pgm
Dual Pulse M1A M1B Pgm Pgm Pgm Pgm Pgm Pgm
Dual/Integrity M1A M1B M1Ā M1B Pgm Pgm Pgm Pgm
In #9 In #10 In #11 In #12 In #13 In #14
Single Pulse Pgm Pgm Pgm Pgm Pgm Pgm
Dual Pulse Pgm Pgm Pgm Pgm Pgm Pgm
Dual/Integrity Pgm Pgm Pgm Pgm Pgm Pgm

9.3.2. AccuLoad IV Meter Input Wiring Matrix - AccuLoad Models ST, and N4

Table 34. 6 Product Meters (AccuLoad IV-ST, N4 Hardware)

6 Product Meters (AccuLoad IV-ST, N4 Hardware)

In #1 In #2 In #3 In #4 In #5 In #6 In #7 In #8
Single Pulse M1A M2A M3A M4A M5A M6A Pgm Pgm
Dual Pulse N/A N/A N/A N/A N/A N/A N/A N/A
Dual/Integrity N/A N/A N/A N/A N/A N/A N/A N/A

Table 35. 5 Product Meters (AccuLoad IV-ST, N4 Hardware)

5 Product Meters (AccuLoad IV-ST, N4 Hardware)

In #1 In #2 In #3 In #4 In #5 In #6 In #7 In #8
Single Pulse M1A M2A M3A M4A M5A Pgm Pgm Pgm
Dual Pulse N/A N/A N/A N/A N/A N/A N/A N/A
Dual/Integrity N/A N/A N/A N/A N/A N/A N/A N/A

Table 36. 4 Product Meters (AccuLoad IV-ST, N4 Hardware)

4 Product Meters (AccuLoad IV-ST, N4 Hardware)

In #1 In #2 In #3 In #4 In #5 In #6 In #7 In #8
Single Pulse M1A M2A M3A M4A Pgm Pgm Pgm Pgm
Dual Pulse M1A M1B M2A M2B M3A M3B M4A M4B
Dual/Integrity N/A N/A N/A N/A N/A N/A N/A N/A

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AccuLoad IV Installation and Maintenance Manual Input and Output Details

Table 37. 5 Product Meters (AccuLoad IV-ST, N4 Hardware

3 Product Meters (AccuLoad IV-ST, N4 Hardware

In #1 In #2 In #3 In #4 In #5 In #6 In #7 In #8
Single Pulse M1A M2A M3A Pgm Pgm Pgm Pgm Pgm
Dual Pulse M1A M1B M2A M2B M3A M3B Pgm Pgm
Dual/Integrity N/A N/A N/A N/A N/A N/A N/A N/A

Table 38. 2 Product Meters (AccuLoad IV-ST, N4 Hardware

2 Product Meters (AccuLoad IV-ST, N4 Hardware)

In #1 In #2 In #3 In #4 In #5 In #6 In #7 In #8
Single Pulse M1A M2A Pgm M4A Pgm Pgm Pgm Pgm
Dual Pulse M1A M1B M2A M2B Pgm Pgm Pgm Pgm
Dual/Integrity M1A M1B M1Ā M1B M2B M2B M2Ā M2B

Table 39. 1 Product Meters (AccuLoad IV-ST, N4 Hardware

1 Product Meters (AccuLoad IV-ST, N4 Hardware)

In #1 In #2 In #3 In #4 In #5 In #6 In #7 In #8
Single Pulse M1A Pgm Pgm Pgm Pgm Pgm Pgm Pgm
Dual Pulse M1A M1B Pgm Pgm Pgm Pgm Pgm Pgm
Dual/Integrity M1A M1B M1Ā M1B Pgm Pgm Pgm Pgm

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AccuLoad IV Installation and Maintenance Manual SA Components

10 – AccuLoad SA Components

10.1. General

Optional
Ethernet

MMI

MMI

FCM

Figure 34. AccuLoad model Split Architecture

The AccuLoad model SA (Split Architecture) is made up of one or optionally two MMI
units and an FCM unit. The MMI units are the operator control panels and are located for
convenient access by the truck driver. The FCM contains all of the I/O control electron-
ics which are connected to the meters, valves, permissives etc. and it can be located
where it is convenient for service personnel access. Typical installation approaches
are shown below:
Lane Two
FCM
MMI

FCM MMI

Lane One
MMI
Lane One
FCM

FCM
MMI

Figure 35. Model SA typical installation approaches

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AccuLoad IV Installation and Maintenance Manual SA Components

10.2. FCM Components

The FCM contains a minimum of one and a maximum of four board sets to provide up
to 18 loading arms. Each board set consists of an A4M and an A4B and optionally an
A4I module. The board sets are referred to as A, B, C and D and are mounted in the
FCM enclosure as shown below:

Factory Wired

+24 VDC

Ground

Figure 36. Model SA-FCM components

For convenience, a factory wired DC distribution terminal block (shown above) is pro-
vided in the bottom left corner of the FCM there is one DC distribution terminal block for
each of the A4M board(s) in the FCM. The input to this terminal block is factory wired to
the associated board set and provides 12 separate slots to supply 24 VDC to external
equipment such as the MMI, external meter transmitters, DC digital inputs etc.

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10.3. MMI Components

The basic MMI contains a THMI module and optionally, may contain any of the following:
• Proximity card reader
• Indicator lights (1 or 2)
• Pushbutton switch
• Ethernet extender module
• USB to serial adapter
• AC power supply

10.3.1. MMI Components Locations

As the minimum, the MMI requires power and a communications link to the FCM. If the
optional AC power supply is installed in the MMI, the power connections are made to
the input terminals of the AC power supply (following the label for the correct terminals).
When using DC power from the FCM, the power is connected to the DC power block
as shown below:

HMI "CN3"
HMI RJ-45
JACK "ETH1" OPTIONAL OPTIONAL
ETHERNET EXTENDER USB TO SERIAL
CONVERTER

OPTIONAL

OPTIONAL ARD
READER
OPTIONAL DC
BLOCK

Factory Wired

+24 VDC

Ground

Figure 37. Model SA - MMI components

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AccuLoad IV Installation and Maintenance Manual SA Components

10.3.2. DC Power connections in the MMI

Ethernet is used for communication between the MMI(s) and the FCM. In the MMI, the
Ethernet connects to the RJ-45 jack ETH1 on the THMI module unless the optional
Ethernet extender is installed in which case it connects to the RJ-45 jack on the Eth-
ernet extender module. The Ethernet connection s required for the AccuLoad SA are
described in Section 11 – Ethernet Wiring.

10.4. SA Addressing

The addresses of each of the board sets in the AccuLoad SA are assigned using DIP
switches located on each of the boards in the set. On the A4M there are two switches
(SW1 and SW2) and the A4B and A4I there is a single switch (SW1) which must be set
based on which board set (A,B,C,or D) the board is associated with. The location of
these switches on each of the boards is shown in section 6. For new equipment, these
are set at the factory and not need adjustment during installation. However, any time
a module is moved or replaced, the address must be set according to the table below:
Table 40. Model SA addressing/switch setting

Board Set SW-1 on A4M / A4B / A4I(s) SW-2 on A4M only

A Switch 7 - Off Switch 8 - Off Switch 3 - Off Switch 4 - Off
B (optional) Switch 7 - Off Switch 8 - ON Switch 3 - Off Switch 4 - ON
C (optional) Switch 7 - ON Switch 8 - Off Switch 3 - ON Switch 4 - Off
D (optional) Switch 7 - ON Switch 8 - ON Switch 3 - ON Switch 4 - ON

Figure 38. AccuLoad SA Ethernet connections

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11 – Ethernet Wiring

Figure 39. Ethernet connections in AccuLoad ST and N4

Figure 40. Ethernet connections in AccuLoad QT

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AccuLoad IV Installation and Maintenance Manual Completing the Installation

12 – Completing the Installation

12.1 Explosion-proof housing closure

When securing the front cover of the AccuLoad model ST or QT, use the following
procedure to ensure the unit is properly sealed and is safe to operate in a Div. 1/
Zone 1 environment:
1. Inspect the door seal O-ring for damage and replace if damaged. The O-ring is not
required to maintain the explosion-proof rating, however it is required to maintain
the IP 65 ingress protection rating. Grease cover flange with petroleum jelly or
TechnipFMC grease (P/N 644886401) before attachment of the cover to the housing.
2. Verify the mating areas between the front cover and the main housing are not scratched,
corroded or otherwise damaged such that the surface contact between them would
be compromised.
3. Close the cover and tighten the cap screws around the perimeter of the front cover
using the sequence shown below. The final torque should be 20 FT-LB / 240 IN-LB
(27.1 Nm / 276.4 Kg.cm).Be sure to note the locations for the two longer bolts used
for the security seal wire.
4. Check that the enclosure is properly sealed by verifying the cover to enclosure joint
“gap” with a 0.0015" (0.0381mm) feeler gauge. The feeler gauge must not enter
the joint for more than a ¼" (6mm) at any point around the perimeter of the cover
to housing joint; see Figure 43 for example.

7 3 2 6 10
11
18

12 17
13 16

14 15

8 4 1 5 9

Figure 41. Cover bolt torque pattern for AccuLoad IV-ST

15 11 7 3 2 6 10 14 18

19
28

20 27

21 26

22 25

23 24

16 12 8 4 1 5 9 13 17

Figure 42. Cover bolt torque pattern for AccuLoad IV-QT

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AccuLoad IV Installation and Maintenance Manual Completing the Installation

Figure 43. Flame path verification

Feeler gauge test of cover flame path joint, inspect joint around the complete perimeter
using a 0.0015" (0.0381 mm) feeler gauge. (ALIV-QT shown - use the same procedure
for ALIV-ST).

12.2. Sealing

Each of the AccuLoad enclosures can be sealed using standard seal wires. On the
AccuLoad ST and QT models the seal wire is threaded through holes in two cover bolts
as shown in the following figures:

Seal Wire

Cross
drilled
bolts

Standard
bolts

AccuLoad ST sealing
Figure 44. AccuLoad ST sealing

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AccuLoad IV Installation and Maintenance Manual Completing the Installation

Seal wire

Cross drilled bolts

Standard Bolts

Figure 45.AccuLoad
AccuLoad QT
QTsealing
sealing

To seal any of the NEMA 4 enclosures, simply thread the seal wire through any of the
cover locking clamps opposite the hinge.

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AccuLoad IV Installation and Maintenance Manual Maintenance

13 – Maintenance

13.1 Enclosure Maintenance

Flame Path Inspection Criteria

Models: ALIV-QT-XP or ALIV-ST-XP

WARNING: To prevent ignition of hazardous atmospheres, disconnect from main power

supply before opening the cover.

i. Installation/inspection/maintenance/repair/overhaul/reclamation of the AccuLoad in

the European Union must be performed by qualified personnel in accordance with
the applicable requirements of EN 60079-14, EN 60079-17, and EN 60079-19 in
addition to all local codes/regulations.

ii. Installation/inspection/maintenance/repair/overhaul/reclamation of AccuLoad’s

relying upon the IECEx certification must be performed by qualified personnel in
accordance with the applicable requirements of IEC 60079-14, IEC 60079-17, and
IEC 60079-19 as required by local codes/regulations.

iii. Guidance for equipment inspection and maintenance is provided by EN/IEC 60079-17:
“Electrical Apparatus for explosive gas atmospheres, “Inspection and maintenance
of electrical installations in hazardous areas” and should be utilized for the
inspection / maintenance process.

iv. When performing maintenance that requires opening of the enclosure cover, all
flame paths, which are defined as the machined flanged surface between the
housing and the cover, shall be inspected to ensure that they are clean and
undamaged, no scratches, nicks, corrosion, or other defects that would affect the
integrity of the flame path are allowed. If defects are detected the equipment should
not be placed back into service until the issues are resolved.

v. Verify that all tapped cover bolt threaded locations in the enclosure are clean and
intact with no missing/stripped threads.

vi. Verify that the cover bolts are the required M8 x 1.25-6g, Din 912, Steel Grade
12.9. Prior to reassembly apply a light coating of nickel based anti-seize such as
TechnipFMC P/N (646002401) to all bolt threads.

vii. Verify that any blind threaded cover bolt holes do not have excessive grease /
anti-seize packed into them as this could cause hydraulic fractures of the enclosure
when the bolts are tightened.

viii. Inspect to see that the environmental O-ring is correctly installed (seated into the
groove) and in good condition, no cracks etc. If defective replace to maintain
environmental protection. Grease cover flange with petroleum jelly or TechnipFMC
grease (P/N 644886401) before reattachment of the cover to the housing.

ix. Follow cover bolt torquing procedure as outlined in section 12. When complete,
verify the flame path gaps as per the procedure.

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AccuLoad IV Installation and Maintenance Manual Maintenance

13.2 A4I Kit Retrofit Installation

Note: This does not include the process to authorize entry into the housing in an Ex
environment or closure of the housing. Reference Section 12.

Note: Steps preceded by * are applicable to Dual A4I installation only.

1. Remove power from the AccuLoad IV and remove cover bolts.

2. Remove polycarbonate shield from A4M (4x captive Phillips head screws)

3. Remove captive mounting fastener from A4M closest to AC input terminal block
TBE1.

Note: due to risk of cross threading standoff, remove this fastener by hand

4. From kit, install (4) 0.25” hex standoffs and nylon insert locknuts on to A4M shield.

5. Reinstall A4M shield on A4M

6. Align A4I #1 on standoffs with ethernet jacks nearest the ethernet jacks on the A4M

7. Ensure DIP switch S1-2 is OFF to designate A4I #1

8. From kit, connect ethernet cable:

- ALIV-QT: from A4I #1 ETH2 to A4B ETH2
- ALIV-ST: from A4I ETH2 to A4M ETH3

9. * From kit, install (4) 1.5” hex standoffs to retain the first A4I

10. * From kit, connect additional ethernet cable to A4I#1 ETH1

11. * Ensure DIP switch S1-2 is ON to designate this second A4I as A4I #2

12. * Align A4I#2 on standoffs with ethernet jacks nearest the ethernet jacks on the A4M

13. From kit, install A4I polycarbonate shield

14. * Connect ethernet cable installed in step 10 to A4I#2 ETH1

15. Install ground wires for installed A4Is using the captive mounting fastener nearest
TBE1 on the A4M.

Note: due to risk of cross threading standoff, remove this fastener by hand

16. Install DC supply power (Red & Black twisted pair) wiring
• A4I #1 TB1-1 to A4M TBE4-10
• A4I #1 TB1-2 to A4M TBE4-13
• * A4I #2 TB1-1 to A4M TBE4-11
• * A4I #2 TB1-2 to A4M TBE4-1

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AccuLoad IV Installation and Maintenance Manual Maintenance

13.3 Touch Screen Recalibration Procedures

13.3.1 Equipment and Other Requirements

Nylon stylus MFG: FTDI PN: VA-FC-STYLUS1 or equivalent

WARNING: ** Do not use a pen, screwdriver or any other sharp object. **

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AccuLoad IV Installation and Maintenance Manual Maintenance

13.3.2 Accessing the Display Module menu Through the AccuLoad IV Menu

Step 1: From the Run/Ready Mode screen, enter the Main menu

Step 2: Enter the Device Settings menu

Step 3: If firmware is revision 0.10 or higher, there will be a 'Touchscreen

Calibration' button on this menu. Click this button to begin the process (skip to
the section on Touchscreen Recalibration).

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AccuLoad IV Installation and Maintenance Manual Maintenance

Step 3a. For older firmware, instead select the MMI Settings button and wait for the Display
Module menu to appear. If the menu does not appear after a short time, you may have
to restart the Display Module as follows:

1. Power down the AccuLoad IV unit.

2. Remove the front cover bolts and open the unit.

3. Remove the Ethernet cable that connects the THMI to the A4M board.

4. Re-apply power to the unit.

5. While the THMI is booting, a gear icon will display momentarily.

6. Press this button to access the Display Module Main menu.

7. Proceed to the Recalibration procedure below.

13.3.3 Display Module touch screen recalibration procedure

Step 1: Select Touchscreen Calibration from the Maintenance menu

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AccuLoad IV Installation and Maintenance Manual Maintenance

Step 2: Log in at Security Level 4 using the 4-digit pin “4444”. Upon
successful login, the calibration utility will appear.

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AccuLoad IV Installation and Maintenance Manual Maintenance

Step 3: Calibrate by touching the cursor with the stylus in each of the 5
positions when prompted. If this fails, restart calibration utility then launch the
low-level calibration by firmly pressing the same location on the TSLIB
calibration utility screen 5 times.

Step 3a. A red bar will be displayed on the LCD.

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AccuLoad IV Installation and Maintenance Manual Maintenance

Step 4: Using an approved stylus, tap the screen moving across the red bar
from one corner of the display to the other (try to keep as close to the edge of
the LCD as possible).

Step 4a. Once enough touch points are received, the red bar will be displayed
on a new edge. Once all 4 sides have been calibrated, the process is complete.

13.3.4 Alternate Methods to Initiate a Calibration (if touch screen is unresponsive)

1. Try to initiate calibration using a remote browser

2. Issue a “TC_cal” communications command via Smith host protocol

3. Trigger calibration via internal DIP Switch

13.4 Touch Screen/Screen Protector Maintenance

The touch screen used in the AccuLoad IV is a resistive element with a thin
layer of glass as the top-most layer, to allow the sensor to work when wet, when
the user is gloved, etc. and to avoid damage from exposure to hydrocarbons and
other chemicals. To protect this thin glass layer, a screen protector is applied to
the AccuLoad IV display like one that might be used to protect a mobile phone.

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AccuLoad IV Installation and Maintenance Manual Maintenance

13.4.1 Electrostatic Discharge precautions during operations in Hazardous

locations:

The touch screen features a plastic screen protector installed from the factory
which has a surface area exceeding the area specified in IEC/EN 60079-0.

WARNING: Clean Display with Damp Cloth only.

After a time, this screen protector may become scratched, marred, clouded or
otherwise damaged and may need to be replaced.

13.4.2 Replacing the screen protector

To replace the screen protector, remove the existing screen protector carefully.
First find the edge of the plastic and using a nylon screwdriver or similar tool
(avoid using metal screwdrivers, knife blade or similar tools that can scratch or
crack the underlying glass), peel back a corner of the screen protector until you
can grasp and remove fully. Once the old screen protector has been removed,
clean the class using a damp cloth only and allow to dry. Peel the backing off the
replacement screen protector and apply working from one edge to the other,
taking care to avoid trapping any air bubbles.

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AccuLoad IV Installation and Maintenance Manual Maintenance

13.5 Diagnostic Troubleshooting (Codes on A4M, A4B, A4I)

The circuit boards in the AccuLoad IV contain a 7-segment LED capable of displaying
information about the status of the board. The indications can be decoded using the
following table:

Function LED Description Notes
Display
Bootloader Bb Bootloader Error Active Refer to Bootloader Errors
Status
UU Firmware Update Active Processor firmware is updating
FF Unable to Read Memory Hardware failure – replace board
E1 TCP timeout Check the connection between BBB
and Ethernet port, replace hardware
Bootloader E2 Boot Error Hardware failure – replace board
Errors
E3 Upgrade Error Re-attempt firmware update
E4 No Firmware Error Re-attempt firmware update
E5 Firmware CRC Error Re-attempt firmware update
E6 Bootloader CRC Error Hardware failure – replace board
E7 MAC address NOT Hardware failure – replace board
programmed

13.6 AccuLoad IV Clock Battery Replacement Instructions

WARNING: do not perform this procedure in a hazardous area.

Recommended backup battery replacement interval - 5 years

13.6.1 Battery replacement procedure:

1. Remove power from the unit.

2. Remove connectors and ethernet cables from A4M and A4I boards as applicable.

3. Remove A4M from housing via the (4) captive fasteners on the corners of the A4M.

4. Locate the hole in the A4M mounting tray that allows access to the RTC battery.

5. Battery removal:

a. Position the A4M so the gold tab on the RTC battery socket is pointing
toward the technician.

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AccuLoad IV Installation and Maintenance Manual Maintenance

b. Using flathead screwdriver supplied with unit, press down on the battery on the
right side of the gold tab and pull gently towards the technician.

c. Once the battery is unseated, utilize ESD safe technical tweezers or needle
nose pliers to remove the battery from the assembly.

6. Install new replacement battery:

a. Position the A4M so the gold tab on the RTC battery socket faces away from
the technician. Place RTC battery in hole and under edge of gold tab.

b. Using flathead screwdriver supplied with unit, guide RTC battery into the socket.

7. Re-install the A4M into housing utilizing the (4) captive fasteners on the corners of
the A4M and restore all connections.

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AccuLoad IV Installation and Maintenance Manual Maintenance

13.7 Circuit board Return Merchandise Authorization (RMA) Process Notes

IMPORTANT: ALL ELECTRONIC MATERIALS MUST BE RETURNED USING
PROPER ESD PROTECTION AND PACKAGING.

A4M:

• Remove and retain the License Key (dongle); they are not included with the
replacement A4M boards.

• Retain functioning Analog Modules. (Return non-working modules that need

replaced.) Do not hot-swap analog modules when diagnosing problems - they
require initialization that is performed during the power up process to work properly.

• Disconnect and retain the long ethernet patch cable. Leave the short cable
connected to the COM module in place.

• All Terminal Blocks (connectors) should be removed and retained. They are not
included with replacement boards.

THMI/DISPLAY MODULE AND TOUCH SENSOR:

• If there is a display-related issue and the problem cannot be narrowed down to a

specific component (i.e. touch sensor, LCD) then it is recommended to return the
THMI display module and touch screen assembly as a unit.

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AccuLoad IV Installation and Maintenance Manual Related Publications

14 – Related Publications

The following literature can be obtained from TechnipFMC Measurement Solutions Literature Fulfillment at
measurement.fulfillment@TechnipFMC.com or online at http://info.smithmeter.com/literature/online_index.html.

When requesting literature from Literature Fulfillment, please reference the appropriate bulletin number and title.

Operator Reference.........................................................................................................................Bulletin MN06200

Modbus Communications ...............................................................................................................Bulletin MN06202
Upgrade for S and Q.......................................................................................................................Bulletin MN06203
Smith Communications.................................................................................................................Bulletin MN06204L
Parts List......................................................................................................................................... Bulletin PO06200
Specifications...................................................................................................................................Bulletin SS06200
Calculations......................................................................................................................................Bulletin TP06004

Issue/Rev. 0.1 (2/20) ║ MN06201 • Page 79

 Technical Support
Contact Information:
Field Service Response Center
24/7 Technical Support/Schedule
a Technician: 1-844-798-3819
System Installation Supervision,
Start-Up, Commissioning Services,
and Training Available

Revisions included in MN06201 Issue/Rev. 0.1 (1/20):

Chapter 8 and 13 have been completely revised since the last revision of this document.
The specifications contained herein are subject to change without notice and any user of said specifications should verify from the manufacturer that the specifications are currently in ef-
fect. Otherwise, the manufacturer assumes no responsibility for the use of specifications which may have been changed and are no longer in effect.

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13460 Lockwood Road Smith Meter GmbH
TechnipFMC.com Building S01 Regentstrasse 1
Houston, Texas 77044 USA 25474 Ellerbek, Germany
© TechnipFMC 2020 All rights reserved. MN06201 Issue/Rev. 0.1 (1/20) P:+1 281.591.4000 P:+49 4101 304.0