Bridge-mounted circulators, circulators, refrigerated circulators

Original operating manual

30001614.B 11/2024
EN
 Legal

JULABO GmbH
Gerhard-Juchheim-Strasse 1
77960 Seelbach / Germany
Tel.: +49 7823 51-0
Fax: +49 7823 2491
Info.de@julabo.com
www.julabo.com

The content of this operating manual is protected by copyright. Information,

including texts, images, and other contents may not be reproduced, distributed,
transmitted, stored or otherwise used in any form without prior explicit written
consent.
Illustrations in this operating manual are for illustrative purposes and are not
necessarily displayed to scale.

2
Contents

1 Foreword ............................................................................................. 9
2 About this manual ............................................................................ 10
2.1 Original JULABO spare parts ........................................................ 10
2.2 Accessories ................................................................................... 10
2.3 Warnings ....................................................................................... 11
2.4 Symbols used ................................................................................ 11
3 Intended use ..................................................................................... 12
4 Safety ................................................................................................. 13
4.1 General Safety Instructions for the operating company ................ 13
4.2 Safety instructions ......................................................................... 13
4.3 Safety symbols .............................................................................. 16
4.4 Safety function ............................................................................... 18
5 Product description.......................................................................... 19
5.1 Product overview ........................................................................... 19
5.2 Function description ...................................................................... 19
5.3 Operating and functional elements ............................................... 20
5.4 Interfaces ....................................................................................... 22
5.4.1 Insulation requirements for the connection of external
equipment .............................................................................................. 22
5.4.2 Stakei output ............................................................................ 22
5.4.3 Connection of Pt100 temperature sensor ................................ 24
5.4.4 RS232/RS485 interface ........................................................... 25
5.4.5 Ethernet interface ..................................................................... 26
5.4.6 USB-A interface........................................................................ 26
5.4.7 USB-B interface........................................................................ 26
5.4.8 CAN plug .................................................................................. 27
5.5 Analog interfaces (accessories) .................................................... 28
5.5.1 Alarm output ............................................................................. 29
5.5.2 REG/EPROG socket ................................................................ 30
5.5.3 Standby input ........................................................................... 31
5.6 Operating interface ........................................................................ 32

3
 5.6.1 Softkeys and status icons ......................................................... 33
5.6.2 Explanation of abbreviated terms ............................................. 34
5.7 Alarm messages ............................................................................ 35
5.8 Operator Messages ....................................................................... 36
5.9 Main menu ..................................................................................... 37
5.9.1 Adjust safety menu ................................................................... 37
5.9.2 Menu Determine thermodynamics ........................................... 38
5.9.3 Menu Connect unit ................................................................... 38
5.9.4 Menu Use programmer ............................................................ 38
5.9.5 Record data menu .................................................................... 39
5.9.6 Install unit menu ....................................................................... 39
5.9.7 Settings menu .......................................................................... 39
5.9.8 Unit account menu ................................................................... 39
5.9.9 Service menu ........................................................................... 40
5.9.10 Menu About .............................................................................. 40
5.10 Technical data ............................................................................... 41
5.10.1 Material of parts that come into contact with the medium ........ 43
5.10.2 Technical data for refrigerated circulators ................................ 44
5.10.3 Bath fluids ................................................................................. 45
5.10.4 Water quality requirements ...................................................... 47
5.10.5 Hoses ....................................................................................... 47
6 Transport and installation ............................................................... 48
6.1 Transporting the device ................................................................. 48
6.2 Install the device at the operating location .................................... 48
7 Initial operation ................................................................................. 50
7.1 Setup Wizard ................................................................................. 50
7.2 Mounting the circulator .................................................................. 51
7.2.1 Mount bridge mounted circulator .............................................. 51
7.2.2 Mount heating or refrigerated circulator ................................... 52
7.3 Connect the device to the power supply ....................................... 53
7.3.1 Connect bridge mounted or heating circulator ......................... 53
7.3.2 Connect refrigerated circulator ................................................. 54
7.4 Connecting an external system ..................................................... 55
7.4.1 Connect an external system with screw connections .............. 57
7.4.2 Connect an external system with barbed fittings...................... 58

4
 7.5 Internal cooling coil ........................................................................ 59
7.6 Switch on the device and set the language................................... 60
7.7 Set high temperature safety function ............................................ 61
7.8 Fill device ...................................................................................... 62
7.9 Set up power supply for the refrigerated circulator ....................... 62
7.10 Set chiller mode ............................................................................. 63
7.11 Set limit values .............................................................................. 64
7.11.1 Set temperature warning limits................................................. 64
7.11.2 Adjusting setpoint limits ............................................................ 64
7.11.3 Adjusting actual value limits ..................................................... 65
7.11.4 Band limit for external control................................................... 65
7.11.5 Setting band limit ...................................................................... 66
7.12 Connect external temperature sensor ........................................... 66
8 Operation ........................................................................................... 67
8.1 Switch on the unit .......................................................................... 67
8.2 Switch off the unit .......................................................................... 67
8.3 Start temperature control application ............................................ 68
8.4 Basic settings ................................................................................ 68
8.4.1 Set language ............................................................................ 68
8.4.2 Change language to English .................................................... 68
8.4.3 Set date and time ..................................................................... 69
8.4.4 Activate autostart function ........................................................ 69
8.4.5 Set physical units ..................................................................... 69
8.5 Unit account .................................................................................. 70
8.5.1 Change password .................................................................... 70
8.5.2 Defining user-dependent settings ............................................ 71
8.5.3 Defining user-independent presets .......................................... 71
8.5.4 Log in user................................................................................ 72
8.5.5 Log out user ............................................................................. 72
8.5.6 Lock the device ........................................................................ 72
8.5.7 Set inactivity timer .................................................................... 73
8.5.8 Reset settings........................................................................... 73
8.6 Record data ................................................................................... 74
8.6.1 Record measurement data....................................................... 74
8.6.2 Reading out blackbox data....................................................... 74

5
 8.6.3 Displaying alarm memory ......................................................... 75
8.7 Thermodynamics ........................................................................... 76
8.7.1 Control parameter .................................................................... 76
8.7.2 Optimizing temperature curves ................................................ 77
8.7.3 Adjust controller ........................................................................ 78
8.7.4 Limit cooling capacity and heating capacity ............................. 78
8.7.5 Adjust pump.............................................................................. 78
8.8 Remote control device ................................................................... 79
8.8.1 Remote control device using USB interface............................. 79
8.8.2 Set RS232 interface parameters .............................................. 80
8.8.3 Remote control device using RS232 interface ......................... 80
8.8.4 Remote control device using RS485 interface ......................... 81
8.8.5 Set EPROG input ..................................................................... 82
8.8.6 Set actual value source ............................................................ 83
8.8.7 Set external setpoint values ..................................................... 83
8.8.8 Set up actuating variable .......................................................... 84
8.8.9 Request device status .............................................................. 84
8.9 Watchdog function ......................................................................... 85
8.10 Handshake alternative ................................................................... 85
8.11 Working with the programmer ....................................................... 86
8.11.1 Setting the timer ....................................................................... 87
8.11.2 Creating and editing a temperature control profile ................... 88
8.11.3 Import temperature control profile ............................................ 88
8.11.4 Export temperature control profile ............................................ 89
8.11.5 Delete temperature control profile ............................................ 89
8.11.6 Profile series setup ................................................................... 90
8.11.7 Activate programmer ................................................................ 91
8.12 Configure signal outputs ................................................................ 92
8.12.1 Set up Stakei outlet .................................................................. 92
8.12.2 Configure signal outputs of the REG/EPROG plug .................. 92
8.12.3 Configure alarm outputs ........................................................... 93
8.13 Activating stand-by input ............................................................... 93
8.14 Adjusting the temperature sensor (ATC) ....................................... 94
8.14.1 Adjust internal temperature sensor .......................................... 94

6
 8.14.2 Adjust the internal temperature sensor - multi-point calibration
95
8.14.3 Adjust external temperature sensor ......................................... 96
8.15 Device Reset ................................................................................. 96
9 Maintenance ...................................................................................... 97
9.1 Maintenance schedule .................................................................. 97
9.2 Check safety functions .................................................................. 98
9.2.1 Check the functionality of high temperature cut-off.................. 98
9.2.2 Test the low liquid level safety function .................................... 98
9.3 Check safety symbols ................................................................... 99
9.4 Replace detachable power cord .................................................... 99
9.5 Check and replace fuse............................................................... 100
9.6 Check and replace Stakei fuse ................................................... 101
9.7 Emptying...................................................................................... 102
9.8 Clean device ................................................................................ 103
9.9 Device storage ............................................................................ 104
9.10 Technical Service ........................................................................ 104
9.11 Warranty ...................................................................................... 105
10 Disposal ........................................................................................... 106
10.1 Device disposal ........................................................................... 106
11 EC Declaration of Conformity ....................................................... 107
12 UK Declaration of Conformity ....................................................... 108
13 Appendix ......................................................................................... 108
13.1 Interface commands .................................................................... 109
13.1.1 IN commands ......................................................................... 110
13.1.2 OUT commands ..................................................................... 114
13.1.3 Status commands .................................................................. 118
13.1.4 Status messages .................................................................... 118
13.2 Alarms and Warnings .................................................................. 119
13.3 Modbus TCP/IP register .............................................................. 124
13.3.1 Data type ................................................................................ 124
13.3.2 Feedback on invalid entries ................................................... 124
13.3.3 Function codes ....................................................................... 125
13.3.4 Holding registers .................................................................... 125

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 13.3.5 Input register........................................................................... 129

8
 Foreword

1 Foreword
Congratulations!
You have made an excellent choice.
JULABO would like to thank you for the trust you have placed in our company
and products.
This operating manual will help you become acquainted with the use of our
units. Read the operating manual carefully. Keep the operating manual handy at
all times.

9
About this manual

2 About this manual

This manual is intended for the equipment specified on the cover page.

NOTE

Observe the safety instructions!

Read the Safety section of this manual before using the equipment for the
first time.

2.1 Original JULABO spare parts

Hassle-free continuous operation and safety also depend on the quality of the
spare parts used.

Only original JULABO spare parts guarantee the highest possible quality and
safety. Original JULABO spare parts are available directly from JULABO or your
specialist dealer.
Please note that JULABO cannot provide a warranty service if non-original
JULABO spare parts are used.

2.2 Accessories

JULABO offers a wide range of accessories for the devices. Accessories are not
described in this manual.

The complete range of accessories for the devices described in this manual can
be found on our website www.julabo.com. Use the Search function on the
website.

10
 About this manual

2.3 Warnings

The manual contains warnings to increase safety when using the device.
Warnings must always be observed.
A warning sign displayed in signal color precedes the signal word. The signal
word, highlighted in color, specifies the severity of the hazard.

DANGER

This signal word designates a danger with a high level of risk which, if it not
prevented, will result in death or serious injuries.

WARNING

This signal word designates a danger with a medium level of risk which, if it
not prevented, may result in death or serious injuries.

CAUTION

This signal word designates a danger with a low level of risk which, if it not
prevented, may result in minor to moderate injuries.

NOTE

This signal word designates a possibly harmful situation. If it is not avoided,

the system or objects in its vicinity may be damaged.

2.4 Symbols used

Various symbols are used throughout this manual to aid reading

comprehension. This list describes the symbols used.

 Tools needed for the following approach

 Prerequisite to be met for the following procedure
1. Numbered action steps
 Interim result for individual action steps
 Additional note for individual action steps
 Final result of a procedure
<> Terms in angle brackets denote control menu
[] Terms in square brackets denote keys, softkeys and buttons

11
Intended use

3 Intended use
This section defines the purpose of the unit so that the operator can operate the
unit safely and avoid misuse.

JULABO circulators are laboratory devices that are designed for temperature
control applications with liquid media in a bath tank or with a cooling machine.
An external loop circuit can be connected to the pump connectors so that the
temperature of the bath media can be kept constant.
Only use the device if it is in technically perfect condition and only use it in
accordance with its intended use. Be aware of safety issues or hazards and
comply with the operating manual! In particular, always immediately rectify
faults that could impair safety!
The circulators are not suitable for direct temperature control application of
food, other consumables or pharmaceutical or other medical products.
The devices are not suitable for use in an explosive environment.
The devices are not intended for use in living areas. They may cause interference
with radio reception.

12
 Safety

4 Safety
4.1 General Safety Instructions for the operating company

This section outlines the General Safety Instructions that must be observed by
the operator to ensure safe operation.

• The operator is responsible for the qualifications of its operating personnel.

• The operator must ensure that the operating personnel has been instructed
in use of the device.
• The device operators must receive regular training about the dangers
involved in their work and measures to prevent such dangers.
• The operator must ensure that persons entrusted with the operation,
installation and maintenance have read and understood the operating
manual.
• The device may only be configured, installed, maintained and repaired by
trained personnel with appropriate qualifications.
• If hazardous substances or substances that may become hazardous are
used, the device may only be used by personnel who are qualified to handle
these substances and the device.
• The operator must ensure that the device is checked for safety and
functionality at regular and usage-related intervals.
• The operator must ensure that the mains supply has a low impedance to
prevent influencing other devices powered by the same supply.

Staff qualifications:
Technical staff is understood to be a person who successfully completed
vocational training. They must assess assigned work and be able to
independently recognize and avoid possible dangers based on their specialist
training and work experience.

4.2 Safety instructions

The unit is built in accordance with state of the art technology and recognized
safety regulations. Despite this, its use may pose a risk to life and limb for the
user or third parties.
Therefore, always read and observe the following safety instructions before
using the product.

Use other than for the intended purpose!

If the device is used for purposes other than those intended by the
manufacturer, the protection afforded by the device may be impaired.

13
Safety

Hot surfaces!
The following parts and elements may become hot during operation:
– Bath fluid
– Heating element
– Bath lid
– Bath surface
– Connections for external application
Contact may cause severe burns or scalds to hands and arms, face and limbs.
• Keep sufficient distance from hot surfaces and fluids.
• Wear suitable protective gloves.

Electric shock from electrical system!

Touching damaged live parts can cause severe electric shocks and lead to injury
or even death.
• Have damaged insulation and parts of the electrical system immediately
repaired by JULABO service technicians or a qualified specialist workshop.
• Immediately replace damaged power cords.
• When connected with a mains plug, this mains plug must always be readily
accessible.
• The device may only be connected to power supply mains sockets with a
protective contact (PE)!

Refrigerants are harmful to health!

Refrigerants and their vapors are harmful to health. There is a suffocation risk in
enclosed spaces.
• Do not touch or inhale refrigerants.
• Have damage to the refrigerant cycle repaired only by JULABO service
technicians or qualified specialists.
• If refrigerant leaks, stop the device immediately and ventilate the room
thoroughly.

Natural refrigerants are flammable!

The unit contains flammable refrigerant in a permanently sealed circuit. If there
is a leak in the refrigerant cycle, a flammable concentration may form in the air
and ignite or explode. This can result in serious injury or death.
• Use the required minimum room size for operating the unit.
• If refrigerant leaks, stop the unit immediately and ventilate the room
thoroughly.
• Have damage to the refrigerant cycle repaired only by JULABO service
technicians or qualified specialists.
• Have maintenance work performed only by JULABO service technicians or
qualified specialists.
• Nationally applicable standards and guidelines must be observed.

14
 Safety

Wear personal protective equipment!

Lacking or unsuitable personal protective equipment increases the risk of health
damage and injury.
Personal protective equipment includes, for example:
– Work gloves
– Safety shoes
- Protective clothing
– Breathing protection
- Hearing protection
– Face and eye protection
• Specify and provide personal protective equipment for the respective
application.
• Use only personal protective equipment that is in good condition and
provides effective protection.
• Adapt personal protective equipment to the person, e.g., by size.

Keep safety symbols legible!

Safety symbols on the unit warn of dangers in hazardous areas and are an
important part of the unit’s safety equipment. Missing safety symbols increase
the risk of injury to persons.
• Clean dirty safety symbols.
• Replace damaged and unrecognizable safety symbols immediately.

Maintenance and repair work!

Improper maintenance and repair work jeopardizes operational safety. This can
result in serious injury or death.
• Only carry out work described in this operating manual. Switch off the unit
and disconnect it from the power supply before carrying out any work.
• All other maintenance and repair work may only be carried out by a JULABO
service technician or a qualified specialist workshop.

15
Safety

4.3 Safety symbols

There are safety symbols included with the device, which should be attached to
the device before initial operation.

Safety Description
symbols

Warning of a danger zone. Note operating manual

Warning about hot surface

Warning of cold surface

Warning of a flammable liquid heat transfer medium

Read operating manual before switching on

16
 Safety

Locations safety symbols

17
Safety

4.4 Safety function

Technical protective devices provide for safe operation. If a safety function is

triggered, the operator is alerted with a message on the display and an acoustic
signal.

Adjustable high temperature cut-off

The high temperature cut-off prevents overheating of the heater.
• If the measured temperature rises above the set protective temperature, an
error message is shown on the display. The pump and heater are switched
off. A restart is required.

Overheating protection
The overheating protection prevents overheating of the heater.
• The protective mechanism is triggered when the device recognizes a
temperature difference of more than 20 K between the working
temperature sensor and the safety temperature sensor. Am error message
appears on the display. A restart is required.

Low liquid level protection

A level switch recognizes when the bath fluid fill level in the bath tank is too
low. The device has a two-stage warming system to prevent overheating of the
heater or dry running of the pump.
• The low liquid level warning is triggered when the liquid level in the bath
tank is about half the full level. A warning message appears on the display.
The bath fluid should be topped up.
• The low liquid level alarm is triggered when the float reaches its lower limit
stop. The device switches off the pump and heater. A continuous signal
tone sounds. A warning message appears on the display. A restart is
required.
Produc t des cripti on

18
 Product description

5 Product description
Produc t overvi ew

5.1 Product overview

Circulators can be combined with various baths and cooling machines.

Bridge mounted circulator Heating circulator Refrigerated circulator

MAGIO MX-Z: Circulator with Circulator with closed stainless Circulator with cooling
extendable telescopic bridge steel bath tank. machine.
for mounting on open bath Example: Example: MAGIO MX-1800F
tanks MAGIO MX-BC4 for for standard temperature
temperature control applications
applications in the bath or
externally

5.2 Function description

This section describes the function of the device.

The thermostats are used for internal and external temperature control and
operate in a temperature range from ambient temperature to +300 °C,
depending on the device combination and accessories used. When mounted on
a bath tank, the circulator becomes a heating circulator.

19
Product description

5.3 Operating and functional elements

The following figure shows the operating and functional elements and their
position on the unit.

Control and function elements

1 Mains switch
2 Touchscreen
3 High temperature cut-off setting
4 Mounting screws
5 Ethernet interface
6 USB interface Type A
7 USB interface Type B
8 Stakei outlet, secured
9 Fuse for Stakei output, resettable
10 Mains fuse
11 Mains connection
12 Water connection for cooling coil
13 Water connection for cooling coil
14 Interface for external temperature sensor

20
 Product description

15 RS232/RS485 interface
16 CAN plug for connection with a refrigeration unit
17 Cover for electronics slide-in module with analog connections (accessories)
18 Supply pump connection
19 Pump connection return line

21
Product description

5.4 Interfaces

This section describes the electronic interfaces on the device.

For safe operation, the interfaces must be operated according to their
corresponding permissible specifications.

5.4.1 Insulation requirements for the connection of external equipment

External equipment connected to the thermostat must be reinforced or double
insulated from the mains and the maximum voltages must be below the values
of 30 VAC / 60 VDC.
Also note the maximum voltage information in the technical specifications for
the individual interfaces.

5.4.2 Stakei output

The Stakei output is a control output that can be adjusted to solenoid valves
with various tasks via the operating menu. The desired function is set and
activated in the operating menu.

WARNING

Risk of fatal injury from electric shock!

There is mains voltage at the connection pins of the Stakei output, which can
lead to an electric shock if touched directly. Electric shock can cause serious
injury, burns, or death.
• The connection may only be wired properly and in compliance with the 5
safety rules by qualified electricians or personnel who have received
appropriate electrical training•

The use of the Stake output and its control functionality is the responsibility of
the operator. The operator has to ensure the monitoring of the built-in
functionality.

22
 Product description

The Stakei output can be assigned the following functions:

• Refill device:
The Stakei output switches on when a low liquid level warning is triggered.
If the level of the bath fluid drops below a certain level, the Stakei output
turns on and a connected refilling device can be activated. This pumps bath
fluid into the bath tank until the filling level has returned to a non-critical
level.

• Cooling pulse:
This function is controlled by the current cooling capacity of the device. If
the temperature setpoint is lower than the actual temperature detected by
the device, a pulse-width modulated signal is sent via the Stakei output.
This signal can be used to control a solenoid valve for cyclic counter-cooling
via a cooling coil.

• Backflow:
This function is used as backflow protection in a system where the
connected application is physically higher than the circulator. When the
pump is running, the Stakei output is switched on and a check valve
inserted between the circulator and the application can be controlled. This
prevents the bath fluid flowing from the application to the bath tank while
the pump is not running and causing the bath tank to overflow.

Technical data Stakei output

Mains connection 200-230 V 200-230 V/0.5 A

23
Product description

5.4.3 Connection of Pt100 temperature sensor

The plug ext. Pt100 is used to connect an external Pt100 temperature sensor.
The following section describes the wiring of the plug as well as the connection
cable of the temperature sensor.

Connection of a external Pt100 temperature sensor

[1] Temperature sensor Pt100

[2] Plug, view of solder side
[3] Connection socket on device

Pin Signal
1 I+
2 U+
3 U-
4 I-

24
 Product description

5.4.4 RS232/RS485 interface

The RS232 or RS485 interface is a 9-way D-sub socket for connecting the device
to a PC.

RS232/RS485 socket

RS232 interface pin assignment

Pin 2 RxD receive data Pin 7 RTS request to send
Pin 3 TxD transmit data Pin 8 CTS clear to send
Pin 5 0 V signal GND
Pins 1, 4, 6 and 9 are reserved. Do not use.

RS485 interface pin assignment

Pin 3 B Pin 6 +5 V (max.
50 mA)
Pin 5 0 V signal GND Pin 8 A
Pins 1, 2, 4, 7 and 9 are reserved. Do not use.

RS232/RS485 interface factory settings

Parity straight
Baud rate 4800 baud
Handshake (RS232) Hardware
Address (RS485) 0
Data bit 7
Stop bit 1

25
Product description

5.4.5 Ethernet interface

The device can be connected to a network or directly connected to a PC using

the Ethernet interface.

Ethernet interface

Technical data for Ethernet interface

Voltage level 3.3 VDC

5.4.6 USB-A interface

USB sticks can be connected to the USB-A interface. This unit is capable of
reading data from the USB stick as well as saving data to the USB stick.

Technical data for USB-A interface

Output voltage 5 VDC
Maximum current 500 mA

5.4.7 USB-B interface

A connection to a higher-level control system can be established via the USB B

interface.

Technical data for USB-B interface

Input voltage 5 VDC
Maximum input current 500 mA

26
 Product description

5.4.8 CAN plug

Connection of cooling machine, refrigeration unit. Serves to communicate

between the cooling machine, refrigeration unit, and circulator

Technical data for CAN plug

Output voltage 24 VDC
Maximum current 500 mA

27
Product description

5.5 Analog interfaces (accessories)

The module with analogue interfaces can be ordered as an accessory.

Slot with analogue connections

[1] Alarm output

[2] REG/EPROG plug
[3] Standby input

28
 Product description

5.5.1 Alarm output

The alarm output is a potential-free changeover contact, through which an

externally connected circuit can be switched.

Alarm output diagram

In the <Analog module> menu, a defined state can be selected as the trigger
for the <Alarm output>.
When the respective state is reached, pins 2 and 3 are connected:
• Standby
• Alarm
• Alarm + Standby

When the respective state is reached, pins 1 and 2 are connected:

• Standby/Inverse
• Alarm/Inverse
• Alarm + Standby/Inverse

Alarm output technical data

Maximum switching capacity 30 W/25 VA
Maximum switching voltage 30 VDC/25 VAC
Maximum switching current 1A

29
Product description

5.5.2 REG/EPROG socket

The REG/EPROG socket has three signal outputs and one signal input.
A signal transmitter connected to the programmer input can specify the setpoint
temperature or performance as a variable. The input signal can be a voltage
source or a current source.
The signal outputs can be used at the same time. Two of the three output
channels are designed as voltage outputs, the third as a current output.

[1] Voltage output channel 1 (0-10 VDC, max.

10 mA)
[2] Voltage output channel 2 (0-10 VDC, max.
10 mA)
[3] Gnd for outputs (0 V)
[4] EPROG programmer (0-10 VDC/0-20 mA, max.
24 VDC)
[5] Current output channel 3 (4-20 mA/0-20 mA,
max. 24 VDC)
[6] Gnd for EPROG programmer (0 V)
REG/EPROG socket diagram

30
 Product description

5.5.3 Standby input

With the standby socket the device can be put in standby mode using an
external signal transmitter.

[1] External contact, e.g. switch

[2] Pin 3
[3] Pin 1
[4] Pin 2

Standby socket diagram

31
Product description

5.6 Operating interface

The device is operated by touchscreen. When it is switched on, the display

shows the home screen. Sideways swiping or pressing the side arrows allows
selection between three different home screen presentations.

Home screen

[1] Softkey [Settings] accesses the <Main menu>

[2] Internal/external control display
[3] Display of current internal/external temperature, display off in standby
mode
[4] Temperature sequence setpoint temperature/current temperature internal
and external
[5] Status USB
[6] Status Ethernet
[7] User logged in
[8] Operation locked
[9] Quick access programmer (with active programmer)
[10] Status display programmer (with active programmer)
[11] Display of current performance parameters
[12] Softkey [Setpoint adjustment], display of specified setpoint temperature
[13] Date/time
[14] Fluid level display

32
 Product description

5.6.1 Softkeys and status icons

This section describes the softkeys and status icons found on the operating
interface.

Softkey Function

With the softkey [Start] a temperature control application is

started

With the softkey [Stop] a temperature control application is

stopped

With the softkey [Settings] the <Main menu> is called up

With the softkey [Close] the <Main menu> is closed and

the <Home screen> is called up

Symbol Description

Heating is active

Cooling is active

33
Product description

5.6.2 Explanation of abbreviated terms

The following abbreviations are used on the Home screen:

Abbreviatio Explanation
ns
TSet Setpoint temperature
TOver. warn. Overtemperature warning
TSub. warn. Subtemperature warning
TOver. alarm Overtemperature alarm
TSub. alarm Subtemperature alarm
TProtect. High temperature cut-off
TSafety Safety temperature sensor temperature
TSet max. Maximum setpoint temperature
TSet min. Minimum setpoint temperature
TMax int. Maximum internal temperature
TMin int. Minimum internal temperature
Band high Lower bandlimit
Band low Upper bandlimit
Pump max. Maximum adjustable pump capacity
TInt. Internal actual temperature
TExt. External actual temperature

34
 Product description

5.7 Alarm messages

Errors or disturbances are indicated on the Home screen by alarm messages or

warnings. Tapping the message displays a help text. Important error code
descriptions can be found in the appendix. If you are unable to rectify a fault,
contact Technical Service.

Display of alarm message

Alarm:
In the event of an alarm, the temperature control application is stopped. The
actuators are switched off. At the same time, a continuous acoustic signal
sounds and an alarm message with a red background is shown on the display.
The signal tone can be deactivated by touching the touchscreen. The fault
causing the alarm must be remedied. A restart is required.

Display of warning message

Warning:
In the event of a warning, the temperature control application is not interrupted.
A warning message with an orange background is displayed. A signal tone is
emitted at intervals. The acoustic signal can be deactivated by pressing the
central controller. If the underlying cause of the warning is remedied, the signal
tone ceases. Depending on the cause, warnings may cease automatically after a
period of time, e.g. when the device cools down.

35
Product description

5.8 Operator Messages

Operator messages are informal messages that inform the operator about status
changes of the device.

Display of operator message

Operator messages are shown on a blue background. They provide information

about the operating states of individual units on the Home screen. Status
messages from a connected cooling machine are also displayed as operator
messages.

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 Product description

5.9 Main menu

With the softkey [Settings] on the home screen, you can call up the Main
menu. The Main menu is divided into menu options, which respectively contain
more submenus or in which settings can be specified. With the softkey [Close]
you can always get back to the home screen.

The <Main menu> is divided into the following menu options:

• Adjust safety
• Determine thermodynamics
• Connect unit
• Use programmer
• Record data
• Install unit
• Settings
• Unit account
• Service
• About

5.9.1 Adjust safety menu

In the menu <Adjust safety> limit values are set to define a range for safe
process flow.

• Enabling/disabling autostart
• Setting pump mode
• Setpoint limits: Setting of the upper and lower limits for temperature
setpoint as well as the maximum pump performance
• Temperature limits: High temperature cut-off. Setting alarm and warning
limits, band limits and internal temperature limits in the case of external
control
• Disabling overlevel warning

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Product description

5.9.2 Menu Determine thermodynamics

In the menu <Determine thermodynamics> the control parameters for a

temperature sequence are defined and the pump performance set.

Adjust controller:
• Setting for the control parameters for internal or external control
• Definition of the control behavior
Adjust pump:
• Setting pump output
Adjust limits:
• Specification of the limit values for heating capacity and cooling capacity
External actual value source:
• Select the signal source for the actual value

5.9.3 Menu Connect unit

The device can be connected to a PC and remotely controlled via the USB
interface, the RS232/RS485 interface or via Ethernet. In addition to this, analog
interfaces of external programmers can also be connected. In the menu
<Connect unit> parameters for remote control mode can be set.

• Setting up remote control

• Interfaces
• Watchdog function
• Start up behavior
• External setpoint
• Actuating variable
• Actual value

5.9.4 Menu Use programmer

The menu <Use programmer> is used to program temperature curves, which

can be called up according to definable rules.

• Activate programmer: Set the start time, setpoint, final state, duration and
number of runs of a temperature control application. Programming profile
series
• Manage profile: Creating, managing, importing and exporting profiles.
Graphical display of individual profile courses

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 Product description

5.9.5 Record data menu

The device can record data on an external storage medium. The menu <Record
data> defines the conditions for this and starts recording. The recorded data
can be used for subsequent evaluation.

• Recording measurement data

• Reading out blackbox data
• Reading out the alarm memory

5.9.6 Install unit menu

In the menu <Install unit> several basic settings are specified. Depending on
the device constellation, not all menu functions are available.

• Adjust external temperature sensor

• Import and export device settings
• Reset device
• Set power supply
• Set chiller mode
• Activate and deactivate Booster Heater

5.9.7 Settings menu

In the menu <Settings> the fundamental device settings are specified.

• Set language
• Adjusting date and time
• Adjusting time zone
• Adjusting physical units
• Configuration of Home screen
• Adjusting display brightness

5.9.8 Unit account menu

Access rights are managed in the <Unit account> menu.

• Log in and out of the device

• Lock the device
• Set inactivity timer
• Access rights for basic and advanced users

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Product description

5.9.9 Service menu

The menu <Service> is reserved for JULABO service technicians and password
protected.

5.9.10 Menu About

The menu <About> provides information about the installed software status.

• Display of device identity with voltage variant and firmware status

• Display of installed open source software with licenses

40
 Product description

5.10 Technical data

Performance specifications measured in accordance with DIN12876. Cooling

capacities up to 20°C measured with ethanol; over 20°C with thermal oil unless
specified otherwise. Performance specifications apply at an ambient
temperature of 20°C. Performance values may differ with other bath fluids.

Grouping of the device acc. to CISPR 11:

• The device is an ISM device of group 1, class A, which uses high frequency
for internal purposes
• Class A: Use in an industrial electromagnetic environment

In accordance with IEC 61010-1, the device is designed for safe operation under
the following ambient conditions:
• Indoor use
• Altitude up to 2000 m above sea level
• Ambient temperature +5 ... 40 °C (unless otherwise specified in the
technical data)
• Maximum relative humidity 80 % for temperatures up to 31 °C, decreasing
linearly down to 50 % relative humidity at 40 °C
• Mains voltage fluctuations up to ±10 % of the nominal voltage permissible
if not otherwise specified
• Pollution degree 2
• Overvoltage category II

41
Product description

MAGIO MX
Temperature control application
Working temperature range °C +20 … +300
Temperature stability °C ±0.01
Temperature resolution °C 0.01
Temperature control ICC
Temperature setting Digital
Absolute Temperature Calibration 10-point adjustment
(ATC)
Pump
Pump capacity* % 40 60 80 100
Volume flow l/min 16 22 27 31
Supply pressure bar 0.24 0.44 0.68 0.92
Suction pressure bar 0.16 0.27 0.37 0.40
Maximum viscosity cSt 70
Dimensions
Dimensions (W x D x H) cm 23 (MX-Z: 34) x 19 x 41
Immersion depth cm 20.0
Weight kg 7.6
Display
Display 7“ TFT LCD
Resolution 1024 x 600
Function 10-point multi-touch function
Performance data
Mains connection 200-230 V 50/60 Hz
200 V 230 V
50/60 Hz 50/60 Hz
Current consumption A 14 15
Heating capacity kW 2.3 3.0
Mains fuse 2x F16A/500VAC H 6.3 x 32mm
Fuse Stakei T0.5A/500VAC H 6.3 x 32mm
* Pump stages of the previous model correspond with the following pump output: 1=55 %, 2=65 %,
3=75 %, 4=85 %

42
 Product description

5.10.1 Material of parts that come into contact with the medium

The table lists parts that could come into contact with the bath fluid as well as
the material that the parts are made of. This data can be used to check the
compatibility of the parts with the bath fluid used.

Parts that come into contact Material

with the medium
Motor shaft 1.4301
Pump 1.4301/1.4307
Pump connection 1.4401
Heating element 1.4404
Inbuilt temperature sensor Pt100 1.4571
Float 1.4404
Float rod 1.4301
Hose olive 1.4301
O-ring Viton FPM 75

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Product description

5.10.2 Technical data for refrigerated circulators

This section lists the technical data of the refrigerated circulator.

Technical data MAGIO MX-1800F

Working temperature range °C -50 … +200
Cooling capacity °C +20 0 -20 -30 -40
kW 1.87 1.57 0.77 0.47 0.30
Refrigerant R1270
Permissible voltage deviation ±10%
Dimensions
Dimensions (W x D x H) cm 40 x 50 x 86
Usable bath opening cm 18 x 13
Bath depth cm 20
Volumes min. … max. l 6.5 … 11.0
Weight kg 61.0

Technical data MAGIO MX-2500F

Working temperature range °C -50 … +200
Cooling capacity °C +20 0 -20 -30 -40
kW 2.57 1.87 0.87 0.57 0.37
Refrigerant R1270
Permissible voltage deviation ±10%
Dimensions
Dimensions (W x D x H) cm 40 x 50 x 86
Usable bath opening cm 18 x 13
Bath depth cm 20
Volumes min. … max. l 6.5 … 11.0
Weight kg 61.0

44
 Product description

5.10.3 Bath fluids

The most important criterion when selecting the bath fluid is the working
temperature range in which the application is operated.
• Selection of the bath fluid must ensure that the flash point is never
exceeded when it comes into contact with the ambient air.
• Recommended bath fluids and further information can be found on our
website

• Please note the information in the safety data sheets for the bath liquids
used.

WARNING

Risk of burns due to Flammable heat transfer medium

If a flammable heat transfer medium is used, it may ignite and cause serious
burns when it comes into contact with skin.
• Ensure all ventilation openings are not obstructed
• No smoking! No flame!
• Do not use electrical parts which can produce spark when operating
around the equipment and the application system
• Drain and recover the liquid when the equipment idles, if the liquid heat
transfer medium is used with an open bath tank and if it is highly volatile
at ambient temperature
• Under normal and single-fault conditions, the surface temperature of
flammable liquids must not reach the flash point of the liquid. Set a
safety value that is at least 25 K below the flash point of the bath fluid
being used. Set the temperature safety function as describes in Chapter
“Set high temperature safety function”
• Affix a label on the equipment with symbol if a flammable liquid
heat transfer medium is to be used

45
Product description

NOTE

No liability accepted for usage of bath fluids that are not

suitable!
Unsuitable bath fluids that are not approved by JULABO can damage the
water bath.
• Use bath fluids that are recommended by JULABO
• Before filling, check the parts that are in contact with the medium for
compatibility with the bath fluid
• Do not exceed the maximum permissible viscosity during operation
• Consult JULABO before using a bath fluid other than the recommended
one

NOTE

Material damage caused by freezing water!

Freezing water can damage the device and the sample.
• When using water as the tempering fluid, do not temper below 5°C

WARNING

Danger of burns due to hot steam

Depending on the bath fluid used, hot vapors may be released at higher
temperatures. Contact with hot steam can cause severe burns.
• Do not bend over the open water bath during operation
• Wear protective gloves and glasses
• If possible, operate the unit under an extraction hood

WARNING

Danger of burns due to hot steam

Depending on the bath fluid used, hot vapors may be released at higher
temperatures. Contact with hot steam can cause severe burns.
• Do not bend over the open water bath during operation
• Wear protective gloves and glasses
• If possible, operate the unit under an extraction hood

46
 Product description

5.10.4 Water quality requirements

When using water as a bath fluid, the following requirements apply to the water
quality:
 Calcium carbonate concentration: 0.7 – 1.4 mmol/L
 pH value: 6 – 8.5
 Ultrapure/distilled water is suitable for use as a bath fluid after adding
0.1 g Na2CO3 per liter of water.

NOTE

The following types of water are unsuitable for use as bath fluid:
• Distilled, deionized, fully desalinated water
• Seawater
• Chlorinated water
• Contaminated water
• Water containing iron
• River water

NOTE

Adding ammonia to the bath fluid is not permitted!

5.10.5 Hoses

Hoses for connection of an external system must suit the working temperature
range and the respective temperature control application.
Hoses for every area of application can be found on our website.

Hoses must meet the following requirements:

• Temperature resistance
• Pressure resistance
• Suitable material properties for the bath fluid used

47
Transport and installation

6 Transport and installation

This section describes how to transport the unit safely.

6.1 Transporting the device

A circulator can be transported with the closed bath when mounted.

CAUTION

Risk of crushing by falling device!

A device that is not secured appropriately can fall down during improper
transport and cause crushing injuries.
• Secure the device against tipping and falling during transport
• Secure loose parts against falling during transport
• Transport the device upright and with a suitable means of transport
• Wear personal protective equipment

CAUTION

Burn hazard on the heating element!

The heating element may still be hot even after the device has been switched
off, and may cause burns if touched.
• Allow the device to cool down to room temperature after switching off
• Wear protective gloves

 The device is switched off and emptied.

 A suitable transport trolley is available.
1. Disconnect the mains cable from the device.
2. If necessary, disassemble the temperature control hoses of the external
system.
3. Lift the device by the recessed handles - if necessary, by two persons - and
place it centered on the transport trolley.
 See the technical data for weight information.
4. Secure the device on the transport trolley with straps to prevent it from
tipping over.
5. Place loose parts for the device, such as cables, on the transport trolley.
 The device is then ready for transport and can be safely transported to its
installation location.

6.2 Install the device at the operating location

48
 Transport and installation

This section describes how the device is set up at the installation location.

 The device has been transported to the operation location.

 The size and infrastructure of the operation location are suitable for device
operation.
1. If possible, position the device under an extraction system.
 Depending on the bath fluid, gases may be created at high temperatures.
 Recommended minimum distance of 1 m to other devices, to prevent
electromagnetic interference.
2. Place the device on a level, smooth, non-flammable surface.
3. Ensure that the device is securely positioned.
4. For refrigerated circulators: Ensure an open space in front of and behind the
device of at least 20 cm.
 The device is set up at the operation location.

49
Initial operation

7 Initial operation
Commissioning is carried out in various steps, depending on how the device is
to be used.

7.1 Setup Wizard

The setup wizard starts the first time the unit is switched on. It guides you
through various basic settings. When the setup wizard is complete, the unit is
set up.

Start up the unit as described in this manual. Do not start the unit until you are
prompted to do so in the relevant chapter.

50
 Initial operation

7.2 Mounting the circulator

Bridge M ounted Circ ulator

7.2.1 Mount bridge mounted circulator

With the extendable telescopic bridge, the circulator can be mounted on open
bath tanks with a width of 33 cm to 68 cm.

 Cross-headed screwdriver, size 2

 The circulator is equipped with the telescopic bridge.

 The bath is empty.

1. Dismount the two screws on the sides of the telescopic bridge.

2. Extend the telescopic bridge.

3. Carefully insert the circulator into the bath.

4. Push the telescopic bridge together until the side angle plates rest against
the edge of the bath.
 The thermostat is mounted on the open bath as a bridge mounted
circulator.

51
Initial operation

7.2.2 Mount heating or refrigerated circulator

In the case of a heating circulator or a refrigerated circulator, the circulator is

mounted on the closed bath or on cooling machine.
If the circulator is disassembled, e.g. due to a change of device or for service
purposes, it can then be easily reassembled with the connecting box.

 Open-end spanner, size 7 mm

 The thermostat is ready to be mounted on a closed bath or a cooling

machine.
 The bath is empty.

1. Carefully insert the circulator into the bath.

 Align the four threaded sleeves of the bath with the four fastening screws of
the connecting box.
2. Tighten the four fastening screws [arrows in the image right] by hand.
3. Tighten the fastening screws evenly with the open-ended wrench.
4. Check that the circulator is sitting correctly and that the connecting box
gasket is seated gap-free on the surface of the unit.
 The heating circulator or refrigerated circulator is mounted.

52
 Initial operation

7.3 Connect the device to the power supply

7.3.1 Connect bridge mounted or heating circulator

This section describes how the circulator is connected as a bridge mounted

circulator or heating circulator.

 The circulator is mounted as a bridge mounted or heating circulator.

 The power cable is ready for use. If using the 200-230 V, 50/60 Hz variant in
the United States or Canada, you must use the JULABO power cable USA
3x12AWG (order number 7.901.2694). This power cord is not included.

Front side Back

1. Insert the power cable on the back of the circulator into the mains
connection [1].
2. Connect the circulator to the power supply using the power cable.
 The circulator is connected.

53
Initial operation

7.3.2 Connect refrigerated circulator

This section describes how the circulator is connected as a refrigerated

circulator.

 The circulator is mounted on a refrigeration unit.

 The connection cable, mains cable and CAN bus cable are ready for use.

Front side Back

1. Connect the connection cable [1] of the circulator with the refrigeration
unit.
2. Connect the CAN plugs of both units with the CAN bus cable [2].
3. Connect the refrigeration unit to mains power [3] using the power cable.
 The refrigerated circulator is connected. Alternatively, the units can be
connected to separate circuits. If necessary, the power supply must be set
up in the unit setting.

54
 Initial operation

7.4 Connecting an external system

The device is designed for tempering external, closed loop systems. An external
system is connected to the unit’s pump connections.

CAUTION

Risk of burns due to damaged temperature control hoses!

Hot bath fluid can escape from damaged temperature control hoses and
cause serious burns when it comes into contact with skin.
• Check the temperature control hoses regularly for integrity
• Immediately replace damaged temperature control hoses
• Do not kink temperature control hoses
• Regularly exchange temperature control hoses
• Check the pump connections for leak tightness

NOTE

Material damage due to incompatible externally connected

system!
If the temperature range and/or pressure parameters of an externally
connected system do not match those of the device this can result in damage
to individual components or even failure of the entire system.
• Before connection check the external system for compatibility with the
device combination
• If an external system is connected that is not set up for the maximum
pressure of the device, the pump's flow rate must be limited in the
settings
• If an external system is connected, the safety of the entire system is the
responsibility of the operator

NOTE

Hot pump connections!

The pump connections can become very hot during operation. Heat-sensitive
parts or cables can be damaged if they have contact.
• Pump connections must be covered under insulation during operation
• No loose parts or cables should come into contact with pump connections
during operation

55
Initial operation

NOTE

Overflowing bath fluid due to externally connected systems!

If the externally connected system is higher than the temperature control
system, bath fluid can flow back and overflow when switched off.
• Position the connected external system on the same level or lower than
the temperature control system
• Position a shut-off valve or Solenoid valve between the external system
and the temperature control system as backflow protection.

NOTE

Damaged hoses due to kinking!

Hoses are damaged by kinking and can may leak.
• Lay hoses with large radii
• Avoid kinking of the hoses

56
 Initial operation

7.4.1 Connect an external system with screw connections

This section describes how to connect an external, closed system to the device
using screw connectors.

 Open-end wrench, 17 mm
 Open-end wrench, 19 mm

 The temperature control hoses of the external system are equipped with
M16x1 female and barrel gaskets.

1. Disassemble the union nuts on the pump connectors.

2. Remove the sealing plugs.

3. Screw the hoses onto the pump connectors by hand.

 Pay attention to the supply and runback position.
4. Screw on the pump connections carefully with a maximum of 3 Nm torque.
 The external system is connected.
 If the external system is disassembled, the pump connections must be
resealed with the sealing plugs so that no bath fluid can splash out during
operation.

57
Initial operation

7.4.2 Connect an external system with barbed fittings

This section describes how to connect an external, closed system to the device
using barbed fittings.

 Open-end wrench, 17 mm
 Open-end wrench, 19 mm

 Barbed fittings are available for installation of the external system.

1. Disassemble the union nuts on the pump connectors.

2. Remove the sealing plugs.
3. Push one barbed fitting through each of the union nuts.

4. Mount the barbed fittings with the union nuts on the pump connections.
5. Carefully tighten the union nuts with a maximum of 3 Nm torque.
6. Attach the hoses of the external system on the barbed fittings.
 Pay attention to the supply and runback position.
7. Secure the hose against slippage using tube clamps.
 Check the hoses for secure and leak-proof fit.
 The external system is connected.
 If the external system is disassembled, the pump connections must be
resealed with the sealing plugs so that no bath fluid can splash out during
operation.

58
 Initial operation

7.5 Internal cooling coil

For work close to ambient temperature, some products have an internal cooling
coil. This is used to compensate for the intrinsic temperature of the circulator.
The cooling capacity depends on the inlet temperature of the cooling water.
The cooling hoses provided for connection must be chosen so that damage due
to expected pressure and temperatures can be ruled out.

Technical data:
• Working temperature range 5...80°C
• Max. permissible pressure: 4 bar
• Unpressurized outlet
NOTE

Corrosion and calcification due to inadequate cooling water

quality!
Unsuitable cooling water quality can lead to calcification or corrosion.
• Avoid hard water, water that contains iron or chlorine, distilled or de-
ionized water, seawater or water that comes from cooling towers or
rivers

1. Select suitable cooling water hoses.

2. Connect the cooling water hoses to the cooling coil.
3. Use hose clamps to secure and prevent the coolant hoses from slipping off.
The coolant hoses must be firmly seated.
 Make sure that the connection is tight.
4. Check that the cooling return water pressureless.
 The cooling coil can be used.

59
Initial operation

7.6 Switch on the device and set the language

The language must be set first, to prepare for important basic settings. When
switching on for the first time, alarm messages may be shown on the display.

 The device is connected and ready for operation.

1. Switch the device on at the mains switch.
 The software boots and starts the device. The display shows the device
name, voltage version and software version.
 Since no temperature liquid has been filled yet, the low level alarm is
displayed.
 Depending on the default setting, the high temperature cut-off alarm is
displayed.
2. Call up the <Main menu>.
3. Call up the submenu <Settings> then menu option <Language>.
 The submenu <Language> lists all the languages installed on the device.
4. Select the desired language.
5. Turn the device off so that the alarm message is reset.
 The language is set.

60
 Initial operation

7.7 Set high temperature safety function

Before each new temperature application, the temperature must be set for the
high temperature cut-off. Set a value that is at least 25 K below the flash point
of the bath fluid being used. The surface temperature of the bath fluid must not
exceed the flash point at any time. An alarm is triggered when the set value is
exceeded.

 Slotted screwdriver, size 3

 The device is connected.

 The language is set.
1. Switch the device on.
 If no temperature liquid has been filled yet, the low liquid level alarm is
displayed.
 Depending on the default setting, the high temperature cut-off alarm is
displayed.
2. Call up the <Main menu>.
3. Call up the submenu <Settings> then menu option
<Customize home screen>.
4. For one of the possible display values, activate [High temperature cut-
off].
5. Call up the Home screen.
6. Swipe sideways to show the Home screen view that displays the high
temperature cut-off value TProtect.

7. Use the screwdriver to set the high temperature cut-off.

 The display shows the set value for TProtect.
8. Set a value that is at least 25 K under the flash point of the bath fluid being
used.
 The set value is immediately active.
9. Turn the device off so that the alarm message is reset.
 The high temperature cut-off is set.

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Initial operation

7.8 Fill device

This section describes how the device should be filled with bath fluid during
initial operation.
Specifications for filling volume can be found in the technical data.

 The drain valve is closed.

 The device is switched off.
1. Remove the bath lid.
2. Half fill the bath with bath fluid.
 The bath fluid expands with increasing temperature and can overflow.
 With decreasing temperature, the low liquid level protection can be
triggered and interrupt the temperature control process.
3. Switch the unit on and start the temperature control application.
4. Watch the level indicator and, if necessary, adjust the level by refilling or
draining.
 Once the working temperature has been reached and the sample inserted,
the level of bath fluid in the bath tank should cover the heating coil of the
heating circulator or the cooling coil of the refrigeration unit.
5. Close the bath opening with the bath lid.
 The device is filled with bath fluid.

7.9 Set up power supply for the refrigerated circulator

For a refrigerated circulator, the power supply is configured at the factory. The
circulator is supplied with power from the refrigeration unit. Alternatively, both
units can be connected to separate circuits with one power cable each. The type
of power supply is set in the operating menu.

 The cooling machine is connected.

1. Switch the device on at the mains switch.
2. Call up the <Main menu>.
3. Call up the submenu <Install unit> then the menu option
<Power supply>.
3. Select the type of power supply: [Supply via chiller] for connection to the
same power grid or [Separate supply] for connection to a different power
grid.
 [Supply via chiller] activates the heating capacity limit of the circulator.
It prevents the device combination from exceeding a defined maximum
current consumption and thus from overloading the power grid.
 The power supply for the refrigerated circulator is set up.

62
 Initial operation

7.10 Set chiller mode

For a refrigerated circulator, the chiller mode is preset ex works to automatic

operation. Three different chiller modes can be selected in the operating menu:
• Automatic mode: The controller calculates the duration of the heating
process in the event of a setpoint change of more than +5°K. Based on the
calculated heating duration, the control decides whether the refrigeration
unit is to be switched off or not, depending on demand.
• Always on: The refrigeration unit is permanently switched on during
operation.
• Always off: The refrigeration unit remains switched off during operation.

 The device is switched on.

 The cooling machine is connected.
1. Call up the <Main menu>.
2. Call up the submenu <Install unit> then the menu option
<Chiller mode>.
 The menu option can only be called up if the thermostat detects a
connected refrigeration unit.
3. Select the desired chiller mode.
 The chiller mode is set.

63
Initial operation

7.11 Set limit values

7.11.1 Set temperature warning limits

A warning limit and an alarm limit can be set for low temperature and high
temperature. The warning limit values should be within the alarm limit values. If
the respective temperature limit is exceeded, the device generates an alarm or
warning message.

 The device is switched on.

1. Call up the <Main menu>.
2. Call up the submenu <Adjust safety>.
 Only values that are within the performance values of the device can be
entered.
3. Set the limit value for the [Overtemperature alarm] then confirm your
input with [OK].
4. Set the limit value for the [Overtemperature warning] then confirm
your input with [OK].
5. Set the limit value for the [Subtemperature alarm] then confirm your
input with [OK].
6. Set the limit value for the [Subtemperature warning] then confirm your
input with [OK].
 The temperature limits are set.

7.11.2 Adjusting setpoint limits

The setpoint limits Setpoint max. and Setpoint min. define the upper and lower
limit of the adjustable setpoint temperature range.
The setpoint limit for the pump defines the upper limit value for pump capacity,
adjustable in the menu <Determine thermodynamics>. The lower limit is
set to 40% ex works.

 The device is switched on.

1.Call up the <Main menu>.
2.Call up the submenu <Adjust safety>.
3.Set the [Setpoint min.], [Setpoint max.] and [Pump max.] then
confirm your input.
 Only values that are within the performance values of the device can be
entered.
 The setpoint limits are set.

64
 Initial operation

7.11.3 Adjusting actual value limits

The actual value limits “internal minimum” and “internal maximum” are
effective in the external control operating mode. They define limits for the
expected temperature in the internal bath. The temperature controller cannot
exceed these limit values. Under certain circumstances, the external setpoint will
not be reached.

 The device is switched on.

1. Call up the <Main menu>.
2. Call up the submenu <Adjust safety>.
3. Set the values for internal minimum and internal maximum.
 The actual value limits are set and immediately active.

7.11.4 Band limit for external control

If an external system is being controlled then there is a temperature difference

both during the heating phase and the cooling phase due to inertia. The curve
illustrates the connection between the internal and external temperature
sequence.

Schematic temperature sequence internal/external

[1] Temperature sequence internal

[2] Temperature sequence external system
[3] Band limit upper
[4] Band limit lower

In order to gently control the temperature of a sample in an external system, or

to protect a glass reactor from thermal stress, for example, maximum
permissible temperature differences can be specified for the heating phase and
the cooling phase.

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7.11.5 Setting band limit

The upper and lower band limit is defined in °K. In the heating phase the set
value will be added to the external actual value. In the cooling phase the set
value will be subtracted from the external actual value. The setting range is
between 1 and 200 °K.

 The device is switched on.

1. Call up the <Main menu>.
2. Call up the submenu <Adjust safety>.
3. Set the upper and lower band limit.
 The band limits are set and immediately active.

7.12 Connect external temperature sensor

A Pt100 temperature sensor can be attached to the rear of the device.

 The device is switched off.

 A Pt100 temperature sensor with suitable connection is available.
1. Connect the Pt100 to the ext.Pt100 socket on the back of the device.
2. Switch the device on.
3. Call up the submenu <Determine thermodynamics> and the menu
option <Adjust controller>.
4. In the menu option <Control> activate the interface [External control].
5. Call up the menu option <External>.
6. Set the control parameter for external control.
 The external temperature sensor is connected and ready for operation.
B

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8 Operation
8.1 Switch on the unit

This section describes how to switch on the device.

 The unit is connected and ready for operation.

1. Switch the unit on at the mains switch.
 The software boots and starts the unit. The display shows the unit name,
voltage version and software version.
 The unit is switched on. It switches to the most recently activated operating
mode, manual mode of operation or remote control mode. If the auto start
function is activated, then the unit starts directly into the last setting.
 If remote control mode is enabled, operation at the device is not possible.
First, deactivate the remote control mode.

8.2 Switch off the unit

This section describes how to switch off the device.

 The device is switched on.

1. Press the [Stop] softkey to stop an ongoing temperature control
application.
 If a cooling machine is connected, a message appears on the display that
the cooling machine is shutting down.
 Do not switch off the device until the message has disappeared and the
device is in standby mode.
2. Switch the device off at the mains switch.
 The device is switched off.

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Operation

8.3 Start temperature control application

A temperature application can be started directly on the unit. Other options

include timer-controlled temperature control application with the integrated
programmer and remote control via a connected PC.

 The unit is switched on.

1. From the Home screen, press the [Setpoint adjustment] softkey.
2. Enter the desired setpoint temperature in the input window and confirm
your input.
3. Press the [Start] softkey.
 The unit starts the temperature control application at once. The temperature
control application can be stopped with the [Stop] softkey. The entered
setpoint temperature is saved.
 Observe the following for heating circulators:
For temperature control applications near or below the ambient
temperature: Use a cooling coil or JULABO immersion cooler.

8.4 Basic settings

8.4.1 Set language

The language of the operating interface can be switched to one of the available
languages.

 The device is switched on.

1. Call up the <Main menu>.
2. Call up the submenu <Settings> then menu option <Language>.
 The submenu <Language> lists all the languages installed on the device.
3. Select the desired language.
 The selected language is immediately activated.

8.4.2 Change language to English

A special function makes it easy to change the user interface language to

English at any time.

 The device is switched on.

1. Call up the <Main menu>.
2. Tap the <Main menu> text field on the left menu item for more than 3
seconds.
 The language will be changed to English.

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 Operation

8.4.3 Set date and time

The date and time is preset ex works. This section describes how you can set the
date and time yourself.

 The device is switched on.

1. Call up the <Main menu>.
2. Call up the submenu <Settings> then menu option <Date/time>.
 The submenu shows the currently set date and time as well as selectable
display formats.
3. Set the date and time with the keypad shown and then confirm your input
with [OK].
4. Select the desired display format.
 The date and time are set.

8.4.4 Activate autostart function

The autostart function makes it possible to start a temperature control

application directly using the mains switch or via an intermediate timer.
The device is configured ex works in such a ways that it switches to a safe
operating status in the event of power failure. The autostart function is
deactivated. The display shows “OFF.” The refrigeration aggregate, heater, and
pump motor are disconnected from the mains voltage.

 The device is switched on.

1. Call up the <Main menu>.
2. In the submenu <Adjust safety> activate the interface [Autostart].
 The autostart function is activated. The next time the device is switched on,
the temperature control application will immediately start with the preset
values. You can also insert and program a timer. In this case the mains
switch of the device must remain on.

8.4.5 Set physical units

The physical units for temperature, pressure and flow can be set in the menu.

 The device is switched on.

1. Call up the <Main menu>.
2. Call up the submenu <Settings>.
3. Set the desired units for temperature, pressure and flow.
 The physical units are set.

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Operation

8.5 Unit account

In the menu option <Unit account> the access rights for user groups can be
managed.

Basic users and advanced users can log in with this menu option. Logging in
activates the respectively assigned rights.
The administrator manages the access rights of the two user groups and can
change passwords.

8.5.1 Change password

The password ensures that only authorized persons have access to defined
device functions. The administrator password is required to change a password.
Passwords can be created and changed for the following user groups:
• Basic users, factory setting password: 0000
• Extended users, factory setting password: 00000
• Administrators, factory setting password: 000000

 The device is switched on.

1. Call up the <Main menu>.
2. In the submenu <Unit account> call up the menu option <Settings>.
 An input field will open.
3. Enter the administrator password and confirm your input.
 Factory setting for the administrator password: 000000.
4. Select one of the three user groups.
5. Press the [Change password] button.
 An input field will open. The new password may have up to 19 digits.
6. First think of a new password and make a note of it.
 Note: Entering a new password will overwrite the previous password. It can
no longer be restored! This also applies to the password preset ex works.
7. Enter the new password and confirm your input.
8. Repeat the new password and confirm your input.
 The password has been changed and is immediately active. This allows you
to change the password for each user group.

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 Operation

8.5.2 Defining user-dependent settings

The administrator manages the access rights of the user groups. For basic users
and advanced users it is possible to define which main menus they can access
and whether they are authorized to enter the setpoint or start and stop the
device. A change to access rights requires the administrator password.

 The device is switched on.

1. Call up the <Main menu>.
2. In the submenu <Unit account> call up the menu option <Settings>.
 An input field will open.
3. Enter the administrator password and confirm your input.
 Factory setting for the administrator password: 000000.
4. Select a user group.
5. Activate/deactivate the desired access rights and menus.
 The settings for the user group are active immediately.

8.5.3 Defining user-independent presets

If no user is logged in, user-independent presets are based on operation of the

device. For users who are not logged in, operation of the device may be limited
to certain functions.

 The device is switched on.

1. Call up the <Main menu>.
2. In the submenu <Unit account> call up the menu option <Settings>.
 An input field will open.
3. Enter the administrator password and confirm your input.
 Factory setting for the administrator password: 000000.
4. Select the menu option <Default values>.
5. Activate/deactivate the desired access rights and menus.
 The user-independent preset values are active immediately.

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Operation

8.5.4 Log in user

Logging in a user activates the access rights assigned to their user group.

 The device is switched on.

1. Call up the <Main menu>.
2. In the submenu <Unit account> press the [Login] button.
 An input field will open.
3. Enter the password for your user group and confirm your input.
 Basic users, factory setting password: 0000.
 Extended users, factory setting password: 00000.
 The display shows the logged in user group. The access rights are active
immediately. If the device is switched off and on again, the last logged in
user group remains active.

8.5.5 Log out user

If an active user is logged out, the user-independent access rights that can be
operated by any person are automatically activated.

 The device is switched on.

1. Call up the <Main menu>.
2. Call up the submenu <Unit account>.
3. Press the [Logout] button.
 You are immediately logged out and the user-independent access rights are
activated.
 The current temperature control application remains active. If the user-
independent access rights do not make it possible to stop or change an
active temperature control application, a message appears indicating that
access is blocked. The administrator or the last user can unlock the device.

8.5.6 Lock the device

A logged-in user can lock the device to prevent unwanted interventions. Active
temperature control application is not interrupted. A locked device cannot be
operated, it must first be unlocked by the last user or an administrator.

 The device is switched on.

 A basic user or advanced user is logged in.
1. Call up the <Main menu>.
2. Call up the submenu <Unit account>.
 The logged in user group is displayed.
3. Activate the [Lock unit] button.
 The device is unlocked. The lock symbol is displayed at the bottom edge of
the home screen.

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 Operation

8.5.7 Set inactivity timer

After a defined period of inactivity on the display, the device is automatically

locked. The inactivity timer can be set up by a logged-in user.
Idle

 The device is switched on.

 A basic user or advanced user is logged in.
1. Call up the <Main menu>.
2. Call up the submenu <Unit account>.
 The logged in user group is displayed.
3. Press the [Idle time] button.
 An input field will open.
4. Enter the duration for the inactivity timer in the specified time format and
confirm your input.
 The duration is displayed on the [Idle time] button.
5. Activate the [Idle timer] button.
 The inactivity timer is set up and active. As soon as the duration of inactivity
on the display has elapsed, the device is locked.

8.5.8 Reset settings

All settings in the <Unit account> menu can be reset to factory settings at any
time. The administrator password is required to reset the settings.

 The device is switched on.

1. Call up the <Main menu>.
2. In the submenu <Unit account> call up the menu option <Settings>.
 An input field will open.
3. Enter the administrator password and confirm your input.
 Factory setting for the administrator password: 000000.
4. Press the <Reset> button.
5. Acknowledge the confirmation prompt with [OK].
 All unit account settings are reset to factory settings.

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Operation

8.6 Record data

8.6.1 Record measurement data

Measurement data for an ongoing temperature control application can also be

recorded onto a USB stick at the same time. The record documents the date,
time, setpoint temperature, intern actual value, external actual value and the
percentage power. The data is saved as a .txt file and can be subsequently
analyzed.

 The device is switched on.

 A USB stick is available.
1. Call up the <Main menu>.
2. Call up the submenu <Record data>.
 The warning appears: “No USB stick recognized!”
3. Insert the USB stick into the USB socket on the back of the device.
4. Press the button [File] to change the filename if required.
5. Press the button [Sampling time] and set the cycle in which measurement
data should be recorded.
6. Activate the [Activate] button.
 The measurement data recording is started and this is shown with a red
point on the home screen. The data is recorded on the USB stick using the
specified filename. Stop recording by deactivating the [Activate] button.

8.6.2 Reading out blackbox data

The blackbox stores all relevant data from the last 30 minutes. In addition, the
black box logs alarms and warnings.
The blackbox can be read out and the data sent to technical service for analysis.

 The device is switched on.

 A USB stick is available.
1. Call up the <Main menu>.
2. Call up the submenu <Record data>.
 The warning appears: “No USB stick recognized!”
3. Insert the USB stick into the USB socket on the back of the device.
4. Scroll down the display to Blackbox and press the [File] button to change
the displayed filename if required.
5. Press the button [Save].
 The blackbox data is saved onto the USB stick as a .txt file.

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 Operation

8.6.3 Displaying alarm memory

Alarm messages are stored with date, time, alarm code and unit identifier. The
data can be read out via the menu.

 The device is switched on.

1. Call up the <Main menu>.
2. Call up the submenu <Record data> then the menu option <Alarm
memory>.
 The device lists the stored alarm messages. Individual alarm messages can
be called up by tapping.
 Alarm messages are cleared by swiping to the left and confirming the
displayed delete icon.
 The alarm memory is displayed.

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Operation

8.7 Thermodynamics

8.7.1 Control parameter

The device works with a PID control. Experience has shown that the control
parameters set ex works achieve an optimal temperature sequence in the
sample.
The internal and external control parameters can be adjusted in the submenu
<Determine thermodynamics> <Controller settings>.

Automatic
The device independently calculates the control parameters during tempering
and adjusts them automatically. It is not possible to manually change the
control parameters and dynamics.

Proportional range Xp
The proportional range Xp is the temperature range between the setpoint value
and the actual value, in which the heating capacity can be adjusted from 100%
to 0%. The value for Xp can be selected between 0 K and 10 K.

Integral controller Tn
The integral controller Tn is indicated in seconds. It reduces the difference
between the setpoint value and the actual value caused by the Xp component,
and keeps to the setpoint value.

Differential controller Tv
The differential controller Tv is specified in seconds. It shortens the regulation
time.

Dynamics
With internal control, [Standard] or [Aperiodic] can be selected for the
control dynamics:
• With Aperiodic the temperature increase is temporally offset, so that the
actual temperature doesn’t overshoot
• With Standard the temperature increase is faster, but the actual
temperature can overshoot by up to 5 %

CoSpeed factor
The CoSpeed factor affects the temperature sequence when used with external
control. It directly affects Xpu and causes more aggressive temperature control.

Proportional range Xpu

The proportional range Xpu plays a role in external control. It corresponds with
the proportional range Xp for internal control.

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8.7.2 Optimizing temperature curves

The temperature sequence shown on the display provides information about

how individual control parameters can be optimized to achieve a better result.

Optimal temperature sequence,

temperature quickly reaches the
setpoint without overshooting,
and keeps the setpoint.

Symptom: Temperature sequence

slowly approaches the setpoint
and doesn’t quite reach it.
Solution: Decrease Tv and/or Tn,
increase Xp.

Symptom: Temperature sequence

quickly approaches the setpoint,
but overshoots it and oscillates.
Solution: Increase Tv and/or Tn.

Symptom: Temperature sequence

quickly approaches the setpoint
and overshoots.
Solution: Increase Xp.

Symptom: Temperature sequence

quickly approaches the setpoint,
the temperature builds up and the
setpoint is exceeded.
Solution: Decrease Xp and/or Tv.

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8.7.3 Adjust controller

In the menu <Adjust controller> the individual control parameters for

internal and external control can be set.

 The device is switched on.

1. Call up the <Main menu>.
2. Call up the submenu <Determine thermodynamics> and the menu
option <Adjust controller>.
3. Activate internal or external control.
 This results in the respective adjustable control parameters. External control
is only possible with an externally connected Pt100 temperature sensor.
4. Switch to the submenu <Adjust control performance>.
5. Set the desired parameters.
6. For internal control: Activate the aperiodic temperature sequence or the
standard temperature sequence.
 The control parameters are set and immediately active.

8.7.4 Limit cooling capacity and heating capacity

In the menu <Adjust limits> the cooling capacity and heating capacity are
limited.

 The device is switched on.

1. Call up the <Main menu>.
2. Call up the submenu <Determine thermodynamics> and the menu
option <Adjust limits>.
3. Set the limit values for the cooling capacity and the heating capacity.
 The values are set and are immediately active.

8.7.5 Adjust pump

The performance of the pump can be set in one-percent increments.

 The device is switched on.

1. Call up the <Main menu>.
2. Call up the submenu <Determine thermodynamics> and the menu
option <Adjust pump>.
3. Enter the desired value for pump capacity in percent.
 The minimum value is defined internally. The maximum value is limited to
the adjustable maximum pump capacity in the menu <Adjust safety>.
4. Confirm your input.
 The set value is immediately active. The pump is set.

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 Operation

To achieve low setpoint temperatures, it may be helpful to reduce the pump

output in certain situations. This decreases the pump's heat input into the bath
fluid.

8.8 Remote control device

The device can be connected to a PC via its interfaces and controlled remotely
using a program such as ° EasyTemp. It is also possible to send interface
commands to the device using a terminal.
The respective interface is set up when the remote control is deactivated.
If remote control mode is enabled, the device cannot be operated directly.

8.8.1 Remote control device using USB interface

The unit can be remote-controlled via the USB interface.

 The device is switched off.

 The computer has a terminal program installed.
1. Connect the device (USB plug type B) to the computer with a commercially
available USB cable.
2. Download the suitable USB driver from the download area of the website
www.julabo.com.
 Depending on the operating system used by the connected computer, it may
be necessary to install the USB driver.
3. Install the USB driver on the computer.
4. Switch the device on.
5. Call up the <Main menu> on the device.
6. In the submenu <Connect unit>/<Remote control> activate the USB
interface.
 The home screen will show USB mode.
7. Start the terminal program on the computer.
8. Use the terminal program to select the COM port of the device and establish
a connection.
 Remote control via the USB interface is activated. This is shown with the
“USB” on the home screen. You can now remotely control the device with
interface commands via the computer.

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Operation

8.8.2 Set RS232 interface parameters

The interface parameters cannot be changed during remote control mode. If

they differ from the factory settings, they must be set before remote control
mode is activated.

 Remote control is deactivated.

1. Call up the thermostat in the <Main menu>.
2. Call up the <Serial> menu item in the
<Connect device>/<Interfaces> submenu.
3. First select the desired mode.
4. Set the interface parameters [Baud rate], [Handshake] and [Parity] if
they differ from the factory settings.
 If parity is "None," the number of data bits is set to 8.
 The interface parameters are set and immediately active.

8.8.3 Remote control device using RS232 interface

The device can be remote-controlled via the RS232 interface. A null modem
cable is required to connect to a PC.

 The device is switched off.

 The computer has a terminal program installed.
1. Connect the circulator with the computer using a null modem cable.
2. Switch the circulator on.
3. Call up the circulator on the <Main menu>.
4. In the submenu <Connect unit>/<Interfaces> activate the serial
interface RS232.
5. In the submenu <Connect unit>/<Remote control> activate the
"Serial" connection type.
 The Home screen will show RS232 mode.
6. Start the terminal program on the computer.
7. Enter the interface parameters into the terminal program.
8. Use the terminal program to select the COM port of the circulator and
establish a connection.
 Remote control via the RS232 serial interface is activated. You can now
remote control the circulators with interface commands via the terminal
program. See appendix for interface commands.

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 Operation

8.8.4 Remote control device using RS485 interface

The device can be remote-controlled via the RS485 interface. A null modem
cable is required to connect to a PC.

 The device is switched off.

 The computer has a terminal program such as HTerm installed.
1. Connect the circulator and computer via the RS485 socket, e.g. with a USB
to serial adapter.
2. Switch the circulator on.
3. Call up the circulator on the <Main menu>.
4. In the submenu <Connect unit>/<Interfaces> activate the serial
interface RS485.
5. Enter an address for the RS485 interface.
6. In the submenu <Connect unit>/<Remote control> activate the
"Serial" connection type.
 The Home screen will show RS485 mode.
7. Start the terminal program on the computer.
8. Enter the interface parameters into the terminal program.
9. Use the terminal program to select the COM port of the circulators or the
connected adapter, and establish a connection.
 Remote control via the RS485 serial interface is activated. You can now
remote control the circulators with interface commands via the terminal
program. See appendix for interface commands.

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Operation

8.8.5 Set EPROG input

The EPROG input can be used to send an external voltage or current signal to
the circulator. Depending on the setting, the circulator interprets the input
signals as a setpoint temperature, power capacity, flow or pressure, and can
output the values as a display on the start screen.
Please note the technical data of the REG/EPROG socket.

 The unit is switched on.

 The remote control mode is deactivated.
 A signal transmitter is connected via the REG/EPROG socket.
1. Call up the <Main menu>.
2. Call up the submenu <Connect unit> then menu option <Interfaces>.
3. From the submenu <Analog module> select the menu option <EPROG>.
4. Select input variable [setpoint], [power], [flow], [pressure] or
[current value].
5. Select the signal type voltage or current.
6. Use the connected signal transmitter to go to the lower voltage or current
limit.
 The value is displayed in the menu as the current value (V or A).
7. Tap the [Low value] button and enter the low input value (setpoint,
performance, flow or pressure).
 The value is displayed in the menu as the current value (°C, °F, %, l/min,
gpm, bar, psi).
8. Repeat steps 6 and 7 for [High value].
 The EPROG input is set. In the submenu <Settings>, the values for display
on the home screen can be selected. The setpoint temperature or
performance can also be used as an external setpoint value or as an
actuating variable. The actual value can be used as an actual value source.

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 Operation

8.8.6 Set actual value source

By default, the actual value is measured using a Pt100 temperature sensor. In

addition, the unit offers the option of specifying the actual value via one of the
interfaces.

 The unit is switched on.

 The remote control mode is deactivated.
1. Call up the <Main menu>.
2. In the submenu <Determine thermodynamics> call up the menu
option <Actual value source>.
3. Select Pt100, a digital interface or EPROG.
 EPROG can only be selected if the analog option is available and the "actual
value" is defined as the input variable in submenu <Analog module> for
EPROG.
 The actual value source is set up.

8.8.7 Set external setpoint values

By default the setpoint is adjusted on the device or by the programmer. In

addition to this, the device offers the ability to externally specify the setpoint
using the analog REG/EPROG plug or an external Pt100 temperature sensor.

 The device is switched on.

 The remote control mode is deactivated.
1. Call up the <Main menu>.
2. Call up the submenu <Connect unit> then menu option <External
setpoint>.
3. Select Pt100 or EPROG.
 Pt100 can only be selected if an external Pt100 temperature sensor is
connected to the device. The setpoint is then set using the external
temperature sensor.
 EPROG can only be selected if the analog option is available and the
setpoint is defined as the input variable in submenu <Analog module>
for EPROG.
 The external setpoint value is defined.

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Operation

8.8.8 Set up actuating variable

If the device is in remote control mode then the variable (capacity) with which
the cooling unit or heater is controlled can be set using interface commands.
This section describes how the actuating variable can be set.

 The device is switched on.

1. Call up the <Main menu>.
2. Call up the submenu <Connect unit> then menu option <Actuating
variable>.
3. Select Digital or Analog in the dialog window.
 Digital can only be selected if remote control mode is activated.
 Analogue can only be selected if the electronic module with analogue
connections is available and has been defined as an input variable in the
submenu <Analogue module > for EPROG.
 The actuating variable is set.

8.8.9 Request device status

The current device status can be queried via an interface command.

 The unit is connected to a PC via an interface.

1. In the terminal, enter the command “status” and press [Enter].
 The device responds with a status message. If there is a pending alarm or
warning, the unit sends the corresponding alarm or warning message with
the status query. Explanations of the status messages as well as alarm and
warning messages can be found in the Appendix.

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8.9 Watchdog function

During a temperature control application in remote control mode, the watchdog

function monitors the active interfaces. In the event of a fault in the higher-level
data processing system, the watchdog function ensures that the device switches
to a previously defined safe operating status.

Cyclical data communication between the higher-level main computer and the
unit is crucial. If data transmission is interrupted for a pre-defined period, the
watchdog function is activated.
If the unit is switched to standby (temperature control application stopped),
monitoring is paused. The watchdog is started when the temperature control is
started.
Various conditions for safe operating status can be defined in the operating
menu:
• Mode: Specifies how the unit should react when the watchdog function is
activated.
• Timeout: Defines how long data transfer from the main computer is
permitted to be interrupted before the watchdog function is activated.
• Setpoint: Defines the setpoint temperature that is activated to put the unit in
a safe state/condition.
• Restart mode: Select whether the watchdog function should be reset when
only the setpoint temperature is received or upon all valid commands.
• Enabling/disabling warning. A warning message can be transmitted when
the watchdog function is enabled.
• Reset warning message: Here you can set whether the warning message is
reset manually or automatically.

8.10 Handshake alternative

In the menu <Interfaces>, <Serial>, there is a menu option [Alternative

handshake] when [Handshake] is set to "Software"

• Controller inactive: Standard function, the unit sends handshake characters

when it is not ready to receive. The unit can receive and process several
commands in succession, so handshake characters are not sent after each
command received
• Controller active: A handshake character is transmitted after each received
command and after each response is sent. After each command is received,
the connected control system is thus informed that the unit is not ready to
receive, and after processing of each received command, it is informed that
the unit is ready to receive again

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8.11 Working with the programmer

Temperature control profiles are defined temperature profiles with a setpoint

temperature as well as a predefined temperature control duration or a
predefined gradient. The programmer calculates a temperature ramp from these
programmed values.
The programmer can start these temperature control profiles directly or with a
time delay. The number of repetitions can be set, as can the start time and the
days of the week on which the temperature control profile should run.
In order for programmed temperature control profiles to run automatically, the
device must remain switched on.

NOTE

Falling bath fluid level!

In the case of a prolonged temperature control application, the level of bath
fluid in the bath tank can fall below the alarm limit due to evaporation. A low
liquid level alarm is triggered and temperature control application stops.
• In the event of a prolonged temperature control application, regularly
check the fill level of bath fluid in the bath tank
• If the level is low, refill the bath fluid

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 Operation

8.11.1 Setting the timer

The timer can be used to program the duration of a tempering from 0 to 999
minutes and to program the start time. The target temperature is set as the
setpoint temperature.
After the set duration has elapsed, the device switches to the previously defined
state:
• Standby mode
• Maintain target temperature
• Temper to original setpoint temperature

 The device is switched on.

1. Call up the <Main menu>.
2. Call up the submenu <Use programmer> then the menu option
<Timer>.
 The timer setting options are displayed in the submenu.
 No parameters can be changed when the timer is active. First deactivate the
timer.
3. Use the [Plan start] button to set the desired start time and date then
confirm your input.
4. Set the [Setpoint] and the desired [Duration] then confirm your input.
5. In the [Final state] field, select how the device should behave after the
timer expires.
6. Enable the [Activate] field to start the timer.
 The timer is programmed and active. The set duration starts to elapse once
the setpoint temperature is reached.

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Operation

8.11.2 Creating and editing a temperature control profile

Eight individual temperature control profiles can be created with up to 60

individual steps each. The programmer processes the programmed steps of a
temperature control profile according to the specifications.

 The device is switched on.

1. Call up the <Main menu>.
2. Call up the submenu <Use programmer> then the menu option
<Programmer>.
3. In the submenu <Manage profile> call up one of the profiles.
4. Call up the menu option <Edit profile>.
 The existing steps of the profile are displayed. If there are no steps, the
[Add step] softkey appears.
5. Tap on one of the displayed steps and select the step type via the
[Starting via] button.
 Depending on the step type, the parameter gradient or time is shown.
6. Enter the parameters using the softkeys [Setpoint] and [Gradient] or
[Time] and confirm your input.
7. If necessary, add a new step to the current step using the soft key [Add
step].
 The added step opens as an editable dialog window.
 In the submenu <Manage profile>, you can use the [Display profile]
button to display the created profile as a diagram.
8. When you have finished editing the temperature control profile, the soft key
[Back] takes you back to the submenu <Use programmer>.
 The temperature control profile has been created and saved.

8.11.3 Import temperature control profile

Temperature control profiles can be imported from another device via a USB
stick.

 The device is switched on.

1. Insert the USB stick with a temperature control profile to be imported into
the USB socket.
2. Call up the <Main menu>.
3. Call up the submenu <Use programmer> then the menu option
<Programmer>.
4. In the submenu <Manage profile> call up a profile.
5. Tap the [Import profile] button.
6. In the dialog window, select the temperature control profile to be imported
from the USB stick and confirm your input.
 The temperature control profile is imported and saved in the selected profile
on the device.
 The temperature control profile is imported.

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 Operation

8.11.4 Export temperature control profile

Temperature control profiles can be exported to a USB stick, for example to be

used on other devices.

 The device is switched on.

1. Insert an empty USB stick into the USB socket.
2. Call up the <Main menu>.
3. Call up the submenu <Use programmer> then the menu option
<Programmer>.
4. In the submenu <Manage profile> call up a profile.
5. Tap the [Export profile as] button.
6. Enter a name for the profile to be exported and confirm your input.
7. Tap the [Export profile] button.
 The temperature control profile is exported to the USB stick as a .txt file and
can be imported to other devices.

8.11.5 Delete temperature control profile

Existing temperature control profiles can be completely deleted. This deletes all
saved profile data.

 The device is switched on.

1. Call up the <Main menu>.
2. From the submenu <Use programmer>/<Programmer> call up the
menu option <Manage profile>.
3. Select a temperature control profile.
4. Press the <Clear profile> button.
5. Acknowledge the confirmation prompt.
 The temperature control profile will be deleted. Once all steps are removed,
the [Add step] softkey remains in the deleted profile.

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Operation

8.11.6 Profile series setup

The submenu <Activate programmer> is used to set up the sequence of a

profile series. This defines the start time, the number of runs, the cycle and the
behavior of the device at the end of the profile series.

 The device is switched on.

1. Call up the <Main menu>.
2. Call up the submenu <Use programmer> then the menu option
<Activate programmer>.
3. Scroll down the menu page and select the sequence cycle with the [Series
type] button.
 In addition to daily or weekly, individual weekdays can also be selected.
4. Use the [Use end date] button to select if the profile series should be
ended on a certain date.
5. If necessary, enter the desired end date using the [End date] button.
 If no end date is used, the profile series will run until it is ended manually.
 The profile series is set up. If the programmer is activated, the profile series
starts immediately or at the specified start time and runs through the
selected profile according to the defined settings. Then the programmer will
repeat the profile according to the set series type. After the profile series
has been completed, the device switches to the defined final state. An
ongoing profile series can be ended manually at any time.

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 Operation

8.11.7 Activate programmer

The programmer is started with a selected profile and runs through the profile
according to the specifications.

 The device is switched on.

 The programmer is deactivated.
1. Call up the <Main menu>.
2. Call up the submenu <Use programmer> then the menu option
<Activate programmer>.
3. First use the [Select profile] button to select the desired temperature
control profile.
4. Use the [Number of runs] button to specify how often the selected profile
should be repeated.
5. Use the [Final state] button to specify how the device should behave after
the end.
6. Select the [Plan start] button to specify the start time and start date.
 When the programmer is activated, the start time is shown in the
programmer status display on the home screen. As soon as temperature
control application starts, the active profile is displayed.
7. Scroll up the menu page and activate the programmer.
 The programmer is activated. It starts either immediately or at the
programmed start time on the specified start date and goes through the
specified number of runs one after the other. After the last run, the device
switches to the defined final state.
 When the programmer is active, the [Quick access programmer] button
is displayed at the bottom of the home screen. Use this button to stop or
end the programmer, or edit the active profile.

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Operation

8.12 Configure signal outputs

8.12.1 Set up Stakei outlet

A solenoid valve connected to the Stakei output can be assigned various

functions depending on the application.

When using the Stakei output, a minimum current of 20 mA must be taken into
account.

 The device is switched on.

 A solenoid valve is connected to the Stakei output.
1.Call up the <Main menu>.
2.Call up the submenu <Connect unit> then menu option <Interfaces>.
3.Use the [Control output] button to select the desired function for the
connected solenoid valve.
 The Stakei output is set up and active.

8.12.2 Configure signal outputs of the REG/EPROG plug

The REG/EPROG socket provides three channels as signal outputs. The voltage
or current signals emitted via these channels can be externally processed.
The following values can be output:
• Setpoint: Specified setpoint
• Internal: Internal temperature sensor value
• External: External Pt100 temperature sensor value
• Performance: Value of the variable

 The device is switched on.

 The electronics module with analog connections is mounted.
1. Call up the <Main menu>.
2. Call up the submenu <Connect unit>.
3. From the submenu <Interfaces>, select the menu option <Analog
module>.
4. For [Channel 1] select the output value setpoint, internal, external or
capacity.
5. Enter the lowest output value as the 0 V value.
6. Enter the highest output value as the 10 V value.
7. Repeat the steps 4 to 6 for [Channel 2].
 [Channel 3] configures the current output. 0 mA or 4 mA can be selected
for the lowest output value.
8. Enter the lowest output value as the 0 mA/4 mA value.
9. Enter the highest output value for the 20 mA value.
 The signal outputs of the REG/EPROG socket are configured.

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 Operation

8.12.3 Configure alarm outputs

This section describes how the alarm output is configured.

 The device is switched on.

 The electronics module with analog connections is mounted.
1. Call up the <Main menu>.
2. Call up the submenu <Connect unit>.
3. From the submenu <Interfaces>, select the menu option
<Analog module>.
2. In the menu option <Alarm output>, select the condition to be used as
trigger for a connected external circuit.
 The alarm output is configured.

8.13 Activating stand-by input

This section describes how standby input can be activated.

 The device is switched on.

 The electronics module with analog connections is installed.
1. Call up the <Main menu>.
2. Call up the submenu <Connect unit>.
3. From the submenu <Interfaces>, select the menu option <Analog
module>.
4. Activate [Standby].
 The standby input is activated and can be used.

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Operation

8.14 Adjusting the temperature sensor (ATC)

For physical reasons, there can be a temperature difference in the bath tank
between the temperature sensor and a defined, more remote point within the
bath fluid volume. As a result, the measured temperature deviates slightly from
the actual bath temperature. Adjustment of the temperature sensor can increase
accuracy of the temperature control application.
The adjustment of a temperature sensor requires the determination of the
temperature difference between the temperature sensor and the reference
thermometer. Three adjustment options are available:
• 1-point adjustment: When a sample is tempered to a certain setpoint. The
adjustment curve is displaced parallel to the original curve by the reference
amount.
• 2-point adjustment: When the temperature is controlled between two
setpoints. The slope of the temperature curve is adjusted between two
points.
• Multi-point calibration: When temperature is controlled within a
temperature range. This results in an arched temperature curve.

8.14.1 Adjust internal temperature sensor

This section describes how to adjust the internal temperature sensor of the
device.
 The bath tank is filled.
 The unit is switched on.
 A calibrated reference thermometer is available.
1. Temper the sample to the desired setpoint temperature.
2. Wait until the temperature in the bath has stabilized and is shown on the
display of the circulator.
3. Hang the reference thermometer in the bath tank near the tempered
sample.
4. Read the temperature value on the reference thermometer.
5. Call up the <Main menu> and then the submenu <Install unit>.
6. In the submenu <Adjust temperature sensors> select the function
<ATC internal>.
7. Press the [Add new correction point] button.
 Two options are displayed for selection.
8. If you press [Accept current temperature], the current measured
temperature is adopted and the dialog window for entering the
corresponding correction value opens.
9. When [Enter temperature] is pressed, the dialog window for entering
the temperature value and correction value opens.
10. Enter the required value and confirm your entry.
 The correction value is active immediately.
 The internal temperature sensor is adjusted with a correction point.

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 Operation

8.14.2 Adjust the internal temperature sensor - multi-point calibration

This section describes how to adjust the internal temperature sensor of the
device with multiple correction points. The adjustment can be performed with
up to ten correction points.

 The device is switched on.

 The bath tank is at least two thirds full.
 A calibrated reference thermometer is available.
1. Initially proceed in the same way as for the 1-point adjustment.
2. Go to the Home screen and enter the setpoint temperature for the next
correction point.
3. Wait until the temperature in the bath has stabilized and is shown on the
display of the circulator.
4. Go to the ATC submenu <ATC internal> and press the
[Correction point 1] button or the button of the last correction point that
was added.
 The correction point opens.
5. Press the button for a new correction point and proceed in the same way as
described for the 1-point adjustment.
6. Repeat steps 2 to 5 for each additional correction point and confirm your
input in each case.
 The correction values are active immediately.
 Up to ten correction points can be created for the adjustment.
 The multi-point adjustment is completed. The internal temperature sensor is
adjusted.

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Operation

8.14.3 Adjust external temperature sensor

Measurable temperature differences can also occur in a connected application.

As with the internal temperature sensor, adjustment of the external temperature
sensor can improve accuracy of the temperature control application.

 The device is switched on.

 The application is at least two thirds full.
 A calibrated reference thermometer is available.
1. Temper the sample in the application to the desired setpoint temperature.
2. Wait until the temperature in the application has stabilized and is shown on
the display of the circulator.
3. Hang the reference thermometer in the bath tank of the application near the
tempered sample.
4. Read the temperature value on the reference thermometer.
5. Call up the <Main menu> of the circulator and then the submenu
<Install unit>.
6. In the submenu <Adjust sensor> select the function <ATC external>.
7. Tap the [Correction point 1] button.
8. Enter the reference value in the input window and confirm your input.
 The correction value is active immediately.
 The external temperature sensor is adjusted.
 Adjustment of the external temperature sensor, via up to ten correction
points, is carried out in the submenu <ATC external> in the same way as
adjustment of the internal temperature sensor.

8.15 Device Reset

The function resets the device to the factory settings.

 The device is switched on.

1. Bring up the <Main menu>.
2. Call up the <Reset device> menu item in the <Install device>
submenu.
3. If you want to reset the device, confirm the security prompt with [OK].
 The device is reset to factory settings.
i

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 Maintenance

9 Maintenance
9.1 Maintenance schedule

The table lists regular maintenance work according to its maintenance interval.
The specified maintenance intervals are based on single-shift operation. The
duration given is approximate.

Interval Task Qualification Duration (min)

Every 6 months Check that high temperature cut-off is Operator 5

working correctly

Every 6 months Check that the low liquid level Operator 15

protection is working properly

Every 2 years Check safety symbols Operator 1

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Maintenance

9.2 Check safety functions

To ensure safe and proper operations, the unit safety function must be checked
for functionality at least twice annually.

9.2.1 Check the functionality of high temperature cut-off

This section describes how you can test that the high temperature safety
function is operational.

 Slotted screwdriver, size 3

 The device is switched on.

1. Set the display of the start screen so that it shows the high temperature cut-
off value.
2. Use the screwdriver to adjust the overtemperature protection to a
temperature that is below the displayed actual value.
 An acoustic signal sounds and the alarm message “Set protective
temperature exceeded” is displayed. The high temperature cut-off works.
3. Then set a value that is above the actual value.
4. Switch the device off, wait a few seconds, then switch the device on again.
 The alarm message is deactivated.
5. Set the high temperature cut-off.
 The high temperature cut-off is set and its functionality tested.

9.2.2 Test the low liquid level safety function

This section describes how you can test that the low liquid level safety function
is operational.

 The device is switched on.

1. Remove the bath lid.
2. Using a long object, e.g. a straightedge, carefully push the thermostat float
downwards until it reaches its mechanical stop.
 A beep sounds and the “Tempering fluid level too low” alarm message is
displayed. The low liquid level safety function works.
3. Switch the device off, wait a few seconds, then switch the device on again.
 The alarm message is deactivated.
4. Close the bath opening.
 The low liquid level safety function has been tested for functionality.

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 Maintenance

9.3 Check safety symbols

The safety labels affixed to the device must be clearly legible at all times. Their
condition must be checked every two years.

1. Check the safety signs on the device for legibility and completeness.
2. Replace defective or missing safety markings.
 Safety signs can be reordered from JULABO.
 The safety signs on the device have been checked.

9.4 Replace detachable power cord

The device is equipped with a detachable power cord.

The unit may only be operated with the included power cable. If the power
cable needs to be replaced due to a defect, it can be reordered.

Order number Description

7.901.2655 Power cable EU, 200-230 V
7.901.2701 Power cable CH, 200-230 V
7.901.2665 Power cable CN, 230 V

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Maintenance

9.5 Check and replace fuse

If the device can no longer be switched on, a defective fuse may be the cause.

Fuse: F16A/500VAC H 6.3 x 32mm

 Slotted screwdriver, size 3

 The device is switched off and cooled to room temperature.

1. Disconnect the power supply cable.

2.Use a flat screwdriver to unscrew the fuse holders [arrows image left].
3.Check the fuses [arrow image right].
4.Replace a defective fuse.
 See technical data for fuse type.
5.Mount the fuse holders using tested or replacement fuses.
6.Finally, perform a function test. If the device cannot be switched on even
with new fuses, contact Technical Service.
 The fuses have been checked and replaced.

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 Maintenance

9.6 Check and replace Stakei fuse

If the device can no longer be switched on, a defective fuse may be the cause.

Fuse: T0.5A/500VAC H 6.3 x 32mm

 Slotted screwdriver, size 3

 The device is switched off and cooled to room temperature.

1. Disconnect the power supply cable.

2.Use a flat screwdriver to unscrew the fuse holders [arrows image left].
3.Check the fuses [arrow image right].
4.Replace a defective fuse.
 See technical data for fuse type.
5.Mount the fuse holders using tested or replacement fuses.
6.Finally, perform a function test. If the device cannot be switched on even
with new fuses, contact Technical Service.
 The fuses have been checked and replaced.

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Maintenance

9.7 Emptying

The device must be completely drained if it is to be sent in for technical service

or is to be properly disposed of.
In general, the device should be completely emptied before longer shutdowns or
when there is a change to the external application.

CAUTION

Risk of burns from hot bath fluid!

Bath fluid can become very hot during a temperature control process.
Contact with hot bath fluid can cause scalding.
• Before draining the device, let it cool to room temperature
• Avoid direct contact with hot bath fluid
• Wear protective gloves

 The device is tempered to room temperature and switched off.

1. Place an adequately large collection vessel under the drainage valve.
2. Take off the bath lid.
3. Open the drain valve.
 The bath fluid drains out of the bath tank into the collection vessel
provided.
4. Once the bath tank is completely drained, close the bath opening.
5. Close the drain valve.
 The device is emptied. If an external system is connected, it can now be
disconnected from the device and also drained.

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9.8 Clean device

The circulator and bath tank, and also a cooling machine if connected, should
be cleaned from time to time.
In addition to this, the device must be appropriately decontaminated if
hazardous substances have been spilled on or into the device.

 Lint-free cloth
 Mild cleaning agent

NOTE

Observe during cleaning!

No decontamination or cleaning agents are used which could cause a
HAZARD as a result of a reaction with parts of the equipment or with
material contained in it.

NOTE

Damage to the electronics due to water penetration!

Ingress of water can damage electronic components of the device and thus
lead to failure of the device.
• Clean the outside of the device with a damp cloth only
• Prevent water from entering the device

 The device is switched off and disconnected from the mains voltage.
1.Allow the device to cool down to room temperature.
2.Completely drain the bath fluid.
3.Clean the surface of the circulator and the bath tank with a damp cloth.
 Some dish detergent may also be used for cleaning. If in doubt, ask
technical service for alternative cleaning mediums.
 The device has now been cleaned.

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Maintenance

9.9 Device storage

This section describes how to store the device.

 The device is switched off and disconnected from the mains voltage.
1. Empty all system components completely.
2. Clean the device.
3. Carefully dry the device and all its system components, e.g. with
compressed air.
4. Close all connections.
5. Store the device in a dust-free, dry and frost-free location.
 The device is protected and can be safely stored there. It can be put into
operation again as needed.

9.10 Technical Service

If the unit shows faults you cannot resolve, please contact our Technical Service.

JULABO GmbH
Technical Service
Gerhard-Juchheim-Strasse 1
77960 Seelbach / Germany
Tel.: +49 7823 51-66
Fax: +49 7823 51-99
Service.de@julabo.com

Before sending a device to Technical Service, the following points must be

observed:
• Clean and decontaminate the device properly to avoid endangering service
personnel.
• Include a brief description of the fault.
• Package the device safely for shipment.

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 Maintenance

9.11 Warranty

JULABO provides a warranty that the device will function perfectly as long as it
is connected and used correctly and as described in the operating manual.
The warranty period is one year from the invoice date.

With the 1PLUS warranty, the warranty can be extended to two years free of
charge.
The 1PLUS warranty gives the user a free extended warranty to 24 months, limit
to a maximum of 10,000 hours of service.
A prerequisite for this is that the user registers the device at
www.julabo.com, quoting its serial number, within four weeks of initial
operation. The warranty applies from the date of JULABO GmbH’s original
invoice.

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Disposal

10 Disposal
10.1 Device disposal

When disposing of the device, the applicable country-specific guidelines must be

observed.

1. Completely drain the unit.

2. Contact an authorized waste disposal company for disposal of the unit.
 Disposal of the unit in household waste, or similar facilities for the
collection of domestic waste, is not permissible.
 The unit can be properly disposed of.

106
 EC Declaration of Conformity

11 EC Declaration of Conformity

107
UK Declaration of Conformity

12 UK Declaration of Conformity
UK Office: JULABO UK Ltd., Unit 7, Casterton Road Business Park,
Old Great North Road, Little Casterton, Stamford, PE9 4EJ, United Kingdom,
Tel.: +44 1733 265892

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 UK Declaration of Conformity

12.1 Interface commands

Interface commands allow the device to be remote controlled. Parameters can

be retrieved and the current status can be queried. To do this, the device must
be connected to the master computer via a digital interface. Interface
commands are entered using a terminal program.
Interface commands are divided into IN commands and OUT commands.

String element Symbol Hex

Space  20
Carriage return  0D
Line feed LF 0A

• IN commands: Retrieve parameters

Command structure: Command + 

ex. Querying the setpoint temperature:

IN_SP_00 (RS485: A032_IN_SP_00 )

Example: Device response:

55.5  LF
(RS485: A032_55.5  LF)

• OUT commands: Set parameters (only in remote control mode)

Command structure: Command +  + parameter + 

ex. Set the setpoint temperature to 55.5 °C:

OUT_SP_0055.5 (RS485: A032_OUT_SP_0055.5 )

When working with the RS485 interface, each command is preceded by the
three-digit device address, e. g. address Ad32 = A032.

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12.1.1 IN commands

IN commands retrieve device parameters.

Process values System response

in_pv_00 Actual value
in_pv_01 Current variable (%)
In_pv_02 Current temperature of the external Pt100 temperature sensor
in_pv_03 Current temperature of the temperature safety sensor
in_pv_04 Current setting of the high temperature safety function
in_pv_06 Current pressure. EPROG input must be set to pressure
in_pv_07 Current flow. EPROG input must be set to flow
in_pv_16 Current bath fluid filling level (%)

Process values System response

in_pv_15 Query external actual temperature

Setpoints and warning System response

limits
in_sp_00 Set setpoint temperature
in_sp_03 Set high temperature warning limit
in_sp_04 Set low temperature warning limit
in_sp_05 Set working temperature via EPROG
in_sp_06 Setpoint temperature set via watchdog function
in_sp_07 Set pump stage (1 … 4)
in_sp_10 Set actuating variable specification via serial interface
in_sp_11 Set temperature unit
0 = °C
1 = °F
in_sp_12 Set pressure unit:
0 = bar
1 = psi

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 UK Declaration of Conformity

in_sp_13 Set flow unit:

0 = l/min
1 = gpm
in_sp_27 Set pump setting
in_sp_28 High temperature alarm limit
in_sp_29 Low temperature alarm limit

Unit modes System response

in_mode_01 Return value 0. The value 0 stands for the control temperature
setpoint as only one temperature setpoint can be set (downward
compatibility for older units)
in_mode_02 Selftune:
0 = Selftune disabled
2 = Selftune enabled
in_mode_03 Operating mode setting for the EPROG input:
0 = 0 ... 10 V
1 = 4 ... 20 mA
in_mode_04 Operating mode setting for the temperature control:
0 = Internal
1 = External
in_mode_05 Operating mode set for the temperature control system:
0 = Stop
1 = Start
in_mode_08 Controller dynamics set with internal temperature control:
0 = Aperiodic
1 = Default
in_mode_11 Actuating variable source:
0 = Thermostat
1 = Serial
2 = Analog (EPROG)
In_mode_12 Set actual temperature source:
0 = Pt100 (thermostat)
1 = Serial
2 = USB
3 = Ethernet
4 = Modbus
5 = OPCUA
20 = EPROG

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UK Declaration of Conformity

IN PAR System response

in_par_00 Set sensor difference between working temperature sensor and
safety temperature sensor
in_par_01 Set time constant of the external bath TE
in_par_02 Set internal gradient value SI
in_par_03 Set time constant of the internal bath TI
in_par_04 Set optimization parameter CoSpeed
in_par_05 Ration of cooling/heating capacity pk to ph
in_par_06 Set control parameter Xp of the internal controller
in_par_07 Set control parameter Tn of the internal controller
in_par_08 Set control parameter Tv of the internal controller
in_par_09 Set control parameter Xp of the cascade-controller
in_par_10 Set control parameter Xpu of the subordinate controller (cascade
temperature control)
in_par_11 Set control parameter Tn of the cascade-controller
in_par_12 Set control parameter Tv of the cascade-controller
in_par_13 Set maximum permissible internal temperature InternMax in cascade
temperature control
in_par_14 Set minimum permissible internal temperature InternMin for cascade
temperature control
in_par_15 Set band limit upper in cascade temperature control
in_par_16 Set band limit lower in cascade temperature control

Auxiliary parameters System response

in_hil_00 Set actuating variable limit for cooling capacity (%)
in_hil_01 Set actuating variable limit for heating capacity (%)

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 UK Declaration of Conformity

ATC IN commands Parameter System response

ATC:INT:STATUS Number of correction points used for internal
? adjustment.
ATC:INT:POINTx 1 ... 10 Set values of the requested internal adjustment
? correction point.
Example: ATC:INT:POINT1?
Answer: 20.00;20.01
ATC:EXT:STATUS Number of correction points used for external
? adjustment.
ATC:EXT:POINTx 1 ... 10 Set values of the requested external adjustment
? correction point.
Example: ATC:EXT:POINT1?
Answer: 20.00;20.01

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12.1.2 OUT commands

OUT commands set device parameters. Remote control mode must be active.

Process values System response

out_pv_15 Specifying the external actual temperature

Parameter settings Parameter Setting

out_sp_00 xxx.xx Setting for the setpoint temperature
out_sp_03 xxx.xx Setting for the high temperature
out_sp_04 xxx.xx Setting for the low temperature
out_sp_06 xxx.xx Setpoint temperature setting via watchdog function
out_sp_07* x Set pump to preset levels 1…4:
1 = 55 %, 2 = 65 %, 3 = 75 %, 4 = 85 %
out_sp_10 xxx.xx Setting for the actuating variable via the serial
interface
out_sp_11 x Setting the temperature units:
0 = °C
1 = °F
out_sp_12 x Setting the pressure unit:
0 = bar
1 = psi
out_sp_13 x Adjusting the flow unit:
0 = l/min
1 = gpm
out_sp_27 xxx Pump capacity in %
out_sp_28 xxx.xx High temperature alarm limit setting
out_sp_29 xxx.xx Low temperature alarm limit setting
* Do not use for reprogramming, use out_sp_27 instead. Pump stage 4 has an output pressure of
approx. 450 mbar.

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Unit modes Parameter Setting

out_mode_01 x Setting 0 (the parameter 1 or 2 can also be used for
downwards compatibility. Within the unit it has no
effect)
out_mode_02 x Selftune:
0 = Selftune disabled
2 = Selftune enabled
out_mode_03 x Setting of the operating mode EPROG:
0 = 0-10 V
1 = 0-20 mA
out_mode_04 x Setting of the temperature control:
0 = Internal control
1 = External control
out_mode_05 x Start/stop command of the unit in remote control
mode:
0 = stop tempering
1 = start tempering
out_mode_08 x Setting of the internal control dynamic:
0 = Aperiodic
1 = Default
out_mode_11 x Actuating variable source:
0 = Thermostat
1 = Serial
2 = Analog (EPROG)
out_mode_12 x Actual temperature source:
0 = Pt100
1 = Serial
2 = USB
3 = Erthernet
4 = Modbus
5 = OPCUA
20 = EPROG

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System parameter Parameter Setting

out_par_04 xxx Setting the Cospeed control parameter for internal
control
out_par_06 xxx Setting of the control parameter XP for internal
control
out_par_07 xxx Setting of the control parameter TN for internal
control
out_par_08 xxx Setting of the control parameter TV for internal
control
out_par_09 xxx Setting of the control parameter XP of the
subordinate controller (cascade temperature control)
out_par_10 xxx Setting of the control parameter XPU of the
subordinate controller (cascade temperature control)
out_par_11 xxx Setting of the control parameter TN of the
subordinate controller (cascade temperature control)
out_par_12 xxx Setting of the control parameter TV of the
subordinate controller (cascade temperature control)
out_par_13 xxx Setting of the maximum permissible internal
temperature InternMax in cascade temperature
control
out_par_14 xxx Setting of the minimum required temperature
InternMin in cascade temperature control
out_par_15 xxx Setting of the band limit upper in cascade
temperature control
out_par_16 xxx Setting of the band limit lower in cascade
temperature control

Auxiliary Parameter Setting

parameters
out_hil_00 -xxx Setting of the actuating variable limit for cooling
capacity (0-100%)
out_hil_01 xxx Setting of the actuating variable limit for heating
capacity (0-100%)

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ATC OUT command Parameter Setting

ATC:INT:STATUS 1 ... 10 Sets the number of correction points used for internal
adjustment. 0 = ATC_OFF
Example: ATC:INT:STATUS˽1
A correction point is used.
ATC:INT:POINTx x = 1 ... 10 Example:
˽yy.yy;zz.zz yy.yy = circulator Command:
temperature ATC:INT:POINT1˽20.00;20.10
zz.zz = correction Defines correction point 1 for internal adjustment,
value with circulator temperature = 20.00 °C and
correction value = 20.01 °C.
ATC:EXT:STATUS 1 ... 10 Sets the number of correction points used for
external adjustment. 0 = ATC_OFF
Example: ATC:EXT:STATUS˽1
A correction point is used.
ATC:EXT:POINTx x = 1 ... 10 Example:
˽yy.yy;zz.zz yy.yy = circulator Command:
temperature ATC:EXT:POINT1˽20.00;20.10
zz.zz = correction Defines correction point 1, with circulator
value temperature = 20.00 °C and correction value = 20.01
°C.

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12.1.3 Status commands

Status commands are used to query the current status of the device.

Status commands System response

version Current firmware version
status Return of status, error, warning, alarm

12.1.4 Status messages

Possible status messages from the device for a status query.

Status message Explanation

00 MANUAL STOP Device in standby mode manual operation
01 MANUAL START Device in manual mode
02 REMOTE STOP Device in standby mode, remote control operation
03 REMOTE START Device in remote control mode
-08 INVALID Device did not recognize the last received command
COMMAND
-09 COMMAND NOT Last received command is not permissible in the operating mode
ALLOWED IN
CURRENT OPERATING
MODE
-10 VALUE TOO The last set value is too small
SMALL
-11 VALUE TOO The last set value is too large
LARGE
-13 VALUE EXCEEDS The value is not within the set temperature limits
TEMPERATURE
LIMITS

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12.2 Alarms and Warnings

If the device is connected to a network and remotely controlled, a status query

via interface command will lead to any alarms or warnings that are present
being output as a string.
• The maximum output string length for alarms and warnings is 22 characters
• String structure:
-01 ALARM: xxxxxxx
-01 WARNING: xxxxxxx
• The preceding error code, e.g. -01, is described in the table
If a displayed error code is not described in the table or the error is still pending
after switching off and on again, please contact Technical Service.
The listed error codes can occur depending on the device type and version.

-01 The unit is being operated with a bath  Top up the bath fluid.
fluid level that is too low.  Check the temperature control hoses
for damage and replace if necessary.

-03 The measured temperature is over the  Increase “high temperature"

set high temperature limit. temperature limit or decrease
temperature setpoint.

-04 The measured temperature is below  Reduce “low temperature"

the set low temperature limit. temperature limit or increase
temperature setpoint.

-05 The cable for the working  Contact Technical Service.

temperature sensor has broken or
short-circuited.

-06 The temperature difference between  Increase circulation.

the working temperature sensor and  Check the viscosity of the tempering
the safety temperature sensor is too fluid.
large.  If the fault has not been remedied,
contact Technical Service.

-14 The set protective temperature has  Check working temperature range of
been exceeded. the application.
 Increase the value of the protective
temperature or decrease the setpoint
temperature until it is lower than the
set protective temperature.

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-15 The line of the external temperature  Check electrical connection to external
sensor has short circuited or been temperature sensor.
interrupted.

-38 The setpoint value is set to external  Check whether an external

temperature sensor, but no signal is temperature sensor is connected or
available. whether the electrical connection is
interrupted.
 If necessary, adjust the setpoint value.

-40 The low liquid level protection system  Top up the bath fluid.
indicates when the liquid level is
critical.

-41 The early warning system for high  Drain the bath fluid.
liquid level reports a critical fluid
level.

-47 A current is measured even though  Disconnect the unit from the power
heating is not required. supply.
 Contact Technical Service.

-59 The measured temperature of the  Check ambient temperature and

heat sink in the control section of the reduce if necessary.
Booster Heater has exceeded the  Check the ventilation openings on the
alarm limit. The Booster Heater is control section of the Booster Heater
switched off. for contamination and, if necessary,
clean them.
 If the fault has not been remedied,
contact Technical Service.

-60 Internal read/write error.  Switch off the unit at the mains switch,
wait 4 seconds and then switch the
unit on again.

-61 CAN bus error  Check CAN bus cable for damage and
replace as necessary. Switch the unit
on again. If the fault has not been
remedied, contact Technical Service.
 Alternatively: Deactivate the
refrigeration unit. The circulator
operates as a heater thermostat.

-63 Watchdog function has responded.  Switch off the unit at the mains switch,
wait 4 seconds and then switch the
unit on again.

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-72 Configuration between circulator and  Switch off the unit at the mains switch,
connected refrigeration unit failed. wait 4 seconds and then switch the
unit on again.

-183 Excessive power consumption via USB  Check inserted data storage device for
interface. errors and replace as necessary. The
USB interface is not suitable for
consumers that have a higher current
draw than the maximum permissible
current.

-108 The alarm latch of the protective  Switch off the unit at the mains switch,
equipment is still active. wait 4 seconds and then switch the
unit on again.

-116 The alarm latch of the protective  Switch off the unit at the mains switch,
equipment is still active. wait 4 seconds and then switch the
unit on again.

-142 Unit started, actual value source of  Contact technical service.

the external temperature set on
display, reception timeout of the
external temperature via CAN bus.

-143 The set temperature limit for  Increase overtemperature alarm

overtemperature alarm was exceeded. temperature limit or decrease setpoint
temperature.

-144 The set temperature limit for  Decrease temperature limit of

subtemperature alarm was exceeded. subtemperature alarm or increase
temperature setpoint.

-159 The measured temperature of the  Check ambient temperature and

heat sink in the control section of the reduce if necessary.
Booster Heater has exceeded the  Check the ventilation openings on the
warning limit. The heating capacity of control section of the Booster Heater
the Booster Heater is reduced. for contamination and, if necessary,
clean them.
 If the fault has not been remedied,
contact Technical Service.

-160 Error in measurement of mains  The fuse has tripped or there is a fault
voltage. in the wiring.

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-427 Pressure sensor detects excessive  Check ambient temperature and

condensation pressure. reduce if necessary.
 Check condenser for soiling and clean
as necessary.
 Switch off the unit at the mains switch,
wait 4 seconds and then switch the
unit on again.
 For water-cooled units: Check cooling
water temperature and supply.
 If the fault has not been remedied,
contact Technical Service.

-431 The maximum permissible current  Check mains voltage for nominal
consumption at the compressor has voltage.
been exceeded.  If the fault has not been remedied,
contact Technical Service.

-502 Error communicating with a WLAN  The WLAN stick has been deactivated.
stick when using remote control. Please reconnect the WLAN stick or
WLAN stick has been removed or lost switch the remote control.
connection.

-503 External setpoint value is set via  Connect analog module or deactivate
EPROG, but no analog module is external setpoint specification using
connected. EPROG.

-504 External actuating variable is set via  Connect analog module or deactivate
EPROG, but no analog module is external actuating variable using
connected. EPROG.

-505 The analog module transmits an  Check EPROG settings.

invalid setpoint.

-1109 Viscosity of the bath fluid too high or  Check the temperature of the bath
the circulation rate too low. fluid to ensure it is within the desired
temperature range.

-1305 The rotational speed limit for the  Check pump setting and adjust if
heating capacity block is not reached. necessary.
Motor defective or fluid viscosity too  Check viscosity of the bath fluid and
high. adjust if necessary.

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-1427 Pressure sensor detects excessive  Check ambient temperature and

compensation pressure. reduce if necessary.
 Check condenser for soiling and clean
as necessary.
 Switch off the unit at the mains switch,
wait 4 seconds and then switch the
unit on again.
 For water-cooled units: Check cooling
water temperature and supply.
 If the fault has not been remedied,
contact Technical Service.

-1431 The minimum permissible current  Check mains voltage for nominal
consumption at the compressor has voltage. The specified voltage
been fallen short of. tolerance of the unit must not be
exceeded.
 Check the mains cable of the
refrigeration unit for damage and
replace if necessary.
 Check ambient temperature and
reduce if necessary.
 Check CAN bus cable for damage and
replace as necessary.
 If the fault has not been remedied,
contact Technical Service.

-1501 Timeout of digital interface.  If the watchdog is activated, the

temperature setpoint must be sent to
the unit cyclically at least according to
the set timeout.

-2426 Evaporation temperature has fallen  Check pump setting

below the warning threshold.  Check hose cross-section of connection
to application
 Check that connection to application is
clear
 Check suitability of bath fluid

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12.3 Modbus TCP/IP register

12.3.1 Data type

The Modbus protocol uses 16-bit registers for data transmission. Data that use
more than 16 bits must be divided into several registers. For values that are
divided into several registers, the registers are arranged according to the
Modbus format. For error-free communication, all bus devices need to use the
same format.
Float values are encoded in IEEE754 format (1 bit sign, 8 bit exponent, 23 bit
mantissa).
The Modbus protocol uses the data types listed in the table.

Data type Registers Explanation

short 1 Signed 16-bit value
ushort 1 Unsigned 16-bit value
int 2 Signed 32-bit value
uint 2 Unsigned 32 bit value
float 2 Floating point number with 32 bit

12.3.2 Feedback on invalid entries

If the device receives an invalid data packet, it responds with an exception

response. The following exceptions are recognized by the device.

Code Name Explanation

01 Illegal function The received function code is not supported by
the device. An attempt was made to set a value
although the device is not in remote control
mode.
02 Illegal data address The received data address is not supported by
the device. The combination of data address
and data length is not supported by the device
(e.g. only one register of a value that includes
several registers). The register cannot be
changed.
03 Illegal data value The set value is outside the permitted value
range.

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12.3.3 Function codes

Name Code Code Explanation

(dec.) (hex.)
Read Holding 03 03 Read several holding registers
Registers
Write Single 06 06 Write a single holding register
Registers
Write Multiple 16 10 Write several consecutive holding registers. This
Registers function can be used to set values that use more
than one register.
Read/Write 23 17 Combination of read and write operation
Multiple
Registers
Read Input 04 04
Register

12.3.4 Holding registers

Register Protocol Data type Explanation Adjustable range

address address
40001 0 ushort Start/stop the unit 0: Unit is in standby
1: Unit is started
40002 1 ushort Type of actuating variable 0: Controller
1: Digital
2: EPROG
40003- 2-3 float Setpoint temperature min. - max.
40004
40005 4 short Actuating variable via -100 ... 100
Modbus
40006 5 ushort Actual temperature source 0: Pt100 (thermostat)
1: Serial
2: USB
3: Ethernet
4: Modbus
5: OPCUA
20: EPROG
40007 6-7 float External actual temperature
40008

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Control parameter
40011 10 ushort Internal/external 0: Temperature control
temperature control in the internal bath
1: Temperature control
with external Pt100
40012 11 ushort Set identification 0: No identification.
The saved parameters
are used for the
regulation
1: Unique
identification of the
controlled process
after the next start
2: Permanent
identification of the
controlled process
after each start
40013- 12-13 float Xp control parameter of the 0.1 … 99.9 K
40014 internal controller.
40015 14 ushort Tn control parameter of the 3 … 9999 s
internal controller.
40016 15 ushort Tv control parameter of the 0 … 999 s
internal controller.
40017 16 ushort Control dynamics 0: Aperiodic
1: Standard
40018- 17-18 float Xp control parameter of the 0.1 … 99.9 K
40019 cascade-controller.
40020 19 ushort Tn control parameter of the 3 … 9999 s
cascade-controller.
40021 20 ushort Tv control parameter of the 0 … 999 s
cascade-controller.
40022- 21-22 float P-proportion of the 0.1 … 99.9 K
40023 subordinate controller
40024- 23-24 float CoSpeed control parameter 0.0 … 5.0
40025 of the external controller

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Controller limitations
40041 40 short Maximum desired cooling -100 ... 0
capacity
40042 41 short Maximum desired heating 0 ... 100
capacity
40043- 42-43 float Minimum internal
40044 temperature with cascade
temperature control
40045- 44-45 float Maximum internal
40046 temperature with cascade
temperature control
40047 46 short Lower band limit 0 ... 200 K
40048 47 short Upper band limit 0 ... 200 K
Pump settings
40053 52 ushort Pump capacity 40% ... PumpMax
Temperature warning limits
40061- 60-61 float Low temperature warning
40062 value
40063- 62-63 float High temperature warning
40064 value
40112- 111-112 float High temperature alarm
40113 value
40114- 113-114 float Low temperature alarm
40115 value
Setpoint limits
40071- 70-71 float minimum adjustable
40072 temperature setpoint
40073- 72-73 float maximum adjustable
40074 temperature setpoint
40075 74 ushort maximum adjustable pump 40-100%
capacity
Units
40091 90 ushort Temperature units 0: °C, 1: °F
40092 91 ushort Pressure unit 0: bar, 1: psi
40093 92 ushort Flow unit 0: l/min, 1: gpm

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Date/time
40101 100 ushort Year
40102 101 ushort Month
40103 102 ushort Day
40104 103 ushort Hour
40105 104 ushort Minutes
40106 105 ushort Second

Register Protocol Data type Explanation Adjustable range

address address
40117 116 ushort Start/stop Booster Heater 0: Unit is in standby
(Accessories) 1: Unit is started

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12.3.5 Input register

Register Protocol Data type Explanation Value range

address address
30001- 0-1 uint Firmware version Byte1: Major
30002 Byte2: Minor
Byte3: Build
Byte4: Revision
30004- 3-4 uint Barcode
30005
30006 5 short Remote control mode
30007 6 short Alarm code
30008 7 short Warning code
30011- 10-11 float Bath temperature
30012
30013- 12-13 float Temperature value of the
30014 external Pt100 temperature
sensor
30015 14 short Present heating -100 ... 100
capacity (%)
30016- 15-16 float Safety sensor temperature
30017 value
30042 41 short Current bath fluid filling 0 ... 100
level (%)
30051- Si - Gradient of the internal
50-51 float
30052 bath
30053 Ti - Time constant of the
52 ushort
internal bath
30054 Te - Time constant of the
53 ushort
external bath

129