Operating Manual (PDF) - John Morris Scientific

ESC
130
60
180
30
10 220
°C
ENERGENCY STOP
OFF
ON
Operating Manual
SemiChill Recirculating Coolers
Professional Series
T
NOT-AUS
SC 2500a
air cooled
SC 2500
SC 2500w
water cooled
Software version 3.00
Printed in Germany
Changes without prior notification reserved
1.951.4571 BE4 06/08
Innovative Temperature Technology
JULABO Labortechnik GmbH
77960 Seelbach / Germany
+49 (0) 7823 / 51-0
+49 (0) 7823 / 24 91
info@julabo.de
www.julabo.de
19514571.doc 19.06.08

Content
Page
Operating manual 2 ... 12
Operating instructions 13 ... 71
Congratulations!
You have made an excellent choice.
JULABO thanks you for the trust you have placed in us.
This operating manual has been designed to help you gain an understanding of the principles of
operating and possibilities of our recirculating coolers. For optimum utilization of all functions, we
recommend that you thoroughly study this manual prior to beginning operation.
Quality Management System
We a r e
ISO 9001
2000
c e r
t
i
f
i e d
The JULABO Quality Management System:
Development, production and distribution of temperature application instruments
for research and industries conform to the requirements according to
DIN EN ISO 9001:2000.
Certificate Registration No. 01 100044846
Unpacking and checking
Unpack the recirculating cooler and accessories and check for damages incurred during transit. These
should be reported to the responsible carrier, railway, or postal authority, and a request for a damage
report should be made. These instructions must be followed fully for us to guarantee our full support of
your claim for protecting against loss from concealed damage. The form required for filing such a claim
will be provided by the carrier.
2

Recirculating Cooler
TABLE OF CONTENTS
Operating manual.................................................................................................................. 5
Description .......................................................................................................................... 5
Operator responsibility – Safety recommendations ............................................................ 6
EC Declaration of Conformity.............................................................................................. 8
Warranty conditions ............................................................................................................ 9
Technical specifications .................................................................................................... 10
Operating instructions ......................................................................................................... 13
1. Operating controls and functional elements ................................................................. 13
2. Safety notes for the user .............................................................................................. 16
3. Preparations ................................................................................................................. 16
3.1. Installation................................................................................................................ 16
3.2. Connecting the external system............................................................................... 17
3.2.1. External control............................................................................................... 18
3.3. Bath fluids ................................................................................................................ 18
3.3.1. Tubing............................................................................................................. 20
3.4. Filling........................................................................................................................ 20
3.5. Draining.................................................................................................................... 21
4. Operating procedures................................................................................................... 22
4.1. Power connection .................................................................................................... 22
4.2. Switching on / Start - Stop ....................................................................................... 22
5. Setting the temperatures .................................................................................... 23
6. Safety installations, warning functions................................................................ 24
6.1. Excess temperature protection ................................................................................ 24
6.1.1. Early warning system, low level protection..................................................... 25
6.2. Over and Sub temperature warning functions.......................................................... 26
6.2.1. Change-over of the warning function to shutdown function............................ 27
7. Menu functions ................................................................................................... 28
7.1. MENU PUMP - Setting the pump pressure.............................................................. 29
7.2. MENU CONTROL – Control parameters ................................................................. 30
7.2.1. CONTROL – internal / external control........................................................... 30
7.2.2. SELFTUNING................................................................................................. 31
7.2.3. DYN INT - Dynamic internal ........................................................................... 32
7.2.4. Control parameters – XP, TN, TV internal...................................................... 32
3

7.2.5. COSPEED - external .......................................................................................34
7.2.6. Control parameters – XPU, XP, TN, TV external ............................................35
7.3. MENU CONFIG - configuration.................................................................................36
7.3.1. SETPOINT – Keypad control or remote control ..............................................37
7.3.2. A-START – Autostart.......................................................................................38
7.3.3. OFF-MODE – Pump motor on / off..................................................................39
7.3.4. RESET – Factory settings ...............................................................................39
7.3.5. ACTVAR - actuating variable...........................................................................40
7.3.6. TIME / DATE – setting time and date ..............................................................41
7.4. MENU SERIAL - BAUDRATE, HANDSHAKE, PARITY ...........................................42
7.5. MENU LIMITS...........................................................................................................43
7.6. MENU PROGRAM – Integrated programmer ...........................................................45
7.7. MENU ADJUST – ATC Absolute Temperature Calibration ......................................49
7.8. MENU ANALOG – Analog inputs/outputs.................................................................53
8. Troubleshooting guide / Error messages.......................................................................59
9. Safety recommendations...............................................................................................61
10. Electrical connections....................................................................................................62
11. Remote control ..............................................................................................................64
11.1. Setup for remote control ...........................................................................................64
11.2. Communication with a PC or a superordinated data system ....................................64
11.3. List of commands......................................................................................................65
11.4. Status messages ......................................................................................................69
11.5. Error messages.........................................................................................................69
12. JULABO Service – Online remote diagnosis.................................................................70
13. Maintaining the cooling performance.............................................................................71
14. Cleaning / repairing the unit...........................................................................................71
4

Recirculating Cooler
Operating manual
Description
JULABO recirculating coolers have been designed for temperature application to specific fluids in a
bath tank. The units provide pump nozzles for temperature application to an external system (loop
circuit).
The recirculating coolers are operated via the splash-proof keypad. The
implemented microprocessor technology allows to set and to store different values
that can be indicated on the VFD COMFORT-DISPLAY. Three menu keys facilitate
adjusting setpoints, warning and safety functions and menu functions.
The integrated programmer allows storing and running temperature and timedependent
processes.
1x10
ICC
TCF
ATC 3
RS232
Pt100
SMART
PUMP
“ICC - Intelligent Cascade Control“ represents the supreme solution temperature
control. ICC overs perfect temperature control with self-optimizing PID control
parameters.
The TCF - Temperature Control Features allow the user to have access to all
important temperature control parameters. This means: Full control on the control
mode and the chance to manually adjust or adapt control to the specific application.
Absolute Temperature Calibration (ATC3) provides a high temperature stability in
the bath. With the 3-point calibration an offset is adjusted at three temperatures to
ensure an accurate temperature pattern at the selected spot in the bath over the
full temperature range.
Electrical connections:
The serial interface, switchable from RS232 to RS485, allows modern process
technology without additional interface.
Connection for Pt100 external sensor for external temperature measurement and
control.
The electronic module (option) provides 3 further analog connections (alarm input,
standby input, recorder output, programmer input).
The excess temperature protection conforming to IEC 61010-2-010 is a safety
installation independent from the control circuit. This protection can be indicated
and set on the VFD COMFORT-DISPLAY.
The early warning system for low level signals that bath fluid needs to be refilled
before the low level protection conforming to IEC 61010-2-010 causes a complete
shutdown of the main functional elements.
The pump capacity (electronically adjustable via the motor speed) enables to adapt
to varying conditions for internal and external temperature applications.
JULABO recirculating coolers are not conceived for direct temperature application to
food and luxury articles or pharmaceutical and medico-technical products. Direct
temperature application means: Unprotected contact of the object with the bath
medium (bath fluid).
5

Operating manual
Operator responsibility – Safety recommendations
The products of JULABO Labortechnik GmbH warrant a safe operation if installation, operation and
maintenance is carried out according to common safety regulations. This section informs you about
potential dangers that may arise from operating the recirculating cooler and also mentions the most
important safety precautions.
Persons:
The operator is responsible for the qualification of the personnel operating the units.
The operator should be constantly informed about the dangers involved with their job activities as well
as preventive actions.
Make sure all persons expected to carry out operation, installation and maintenance of the unit read
and understand the safety information and operating instructions.
When using hazardous materials, the recirculating cooler may only be operated by persons that are
absolutely familiar with these materials and the recirculating cooler. These persons must be fully aware
of possible risks.
If you have any questions concerning the operation of your unit or the information in this manual,
please contact us!
Contact :
JULABO Labortechnik GmbH
77960 Seelbach / Germany
+49 (0) 7823 / 51-0
+49 (0) 7823 / 24 91
info@julabo.de
www.julabo.de
Handling:
You received a product conceived for industrial use. Nevertheless, avoid strikes to the housing,
vibrations, damages to the keypad foil (keys, display) or contamination.
Make sure the product is regularly checked for proper condition. Regularly check (at least every
2 years) the proper condition of the mandatory, warning, prohibition and safety labels.
Take care that the mains supply features a low impedance to avoid any negative affects on the
instrument being operated in the same mains.
This unit is designed for operation in a controlled electromagnetic environment. This means that
transmitting devices (e.g. cellular phones) should not be used in the immediate vicinity.
Magnetic radiation may influence other units with components susceptible to magnetic fields
(e.g. a monitor). We recommend to keep a minimum distance of 1 m.
Permissible ambient temperature: max. 40 °C, min. 5 °C.
Permissible relative air humidity: 50 % (40 °C).
Do not store in an aggressive atmosphere. Protect from contaminations. Do not expose to sunlight.
Operation:
Only qualified personnel is authorized to perform configuration, installation, maintenance and repairs of
the recirculating cooler.
Routine operation can also be carried out by untrained personnel who should however be instructed by
trained personnel. The summarized user guidance (short manual) and the specification table with
information on individual parameters are sufficient for this.
6

Recirculating Cooler
Use:
The bath can be filled with flammable materials. Fire hazard!
There might be chemical dangers depending on the bath medium used.
Observe all warnings for the used materials (bath fluids) and the respective instructions (safety data
sheets).
Insufficient ventilation may result in the formation of explosive mixtures. Only use the unit in well
ventilated areas.
Only use recommended materials (bath fluids). Only use non-acid and non corroding bath fluids.
When using hazardous materials, the user must attach the enclosed safety labels to the front of the
unit so they are well visible:
Warning label W00:
Colours: yellow, black
Mandatory label M018
Colours: blue, white
Semi S1-0701
Table A1-2 #9
Danger area.
Attention! Observe instructions.
(operating manual, safety data sheet)
Carefully read the user information prior to beginning
operation
Scope: EU
Carefully read the user information prior to beginning
operation
Scope: NAFTA
Particular care and attention is necessary because of the wide operating range.
There are thermal dangers: Burn, scald, hot steam, hot parts and surfaces that can be touched.
Warning label W26:
Colours: yellow, black
Hot surface warning.
(The label is put on by JULABO)
Observe the instructions in the manuals for instruments of a different make that you connect to the
recirculating cooler, particularly the respective safety recommendations. Also observe the pin
assignment of plugs and technical specifications of the products.
Disposal:
The recirculating cooler contains a so-called back-up battery that supplies voltage to memory chips
when the unit is switched off. Do not dispose of the battery in domestic waste!
Depending on battery regulations in your country, you might be obliged to give back used or defect
batteries to gathering places.
The product may be used with oil as bath fluid. These oils fully or partially consist of mineral oil or
synthetic oil. For disposal, observe the instructions in the safety data sheets.
This unit contains the refrigerants R404A – at this time considered not to have any negative effects on
the ozone layer. However, during the long operating period of the unit, disposal prescriptions may
change. So only qualified personnel should take care of disposal.
Valid in EU countries
Directive 2002/96/EC of the European Parliament and of the Council of 27 January
2003 on waste electrical and electronic equipment (WEEE).
This directive requires electrical and electronic equipment marked with a crossedout
trash can to be disposed of separately in an environmentally friendly manner.
Contact an authorized waste management company in your country.
Disposal with household waste (unsorted waste) or similar collections of municipal
waste is not permitted!
7

Operating manual
EC Declaration of Conformity
Recirculating cooler:
SC 2500a,
SC 2500w
The products mentioned comply with the requirements outlined by the following European
guidelines:
Guideline 73/23/EEC of the Council of 19 February 1973 with respect to legal harmonization of the
member countries concerning electric devices for use within certain voltage
limits
Guideline 89/336/EEC of the Council of 3 May 1989 with respect to legal harmonization of the member
countries concerning electromagnetic compatibility
Guideline 98/37/EC of the European Parliament and the Council of 22 June 1998 for harmonization of
legal and administrative regulations of the member countries with respect to
machinery
Guideline 97/23/EG of the European Parliament and the Council of 29. May 1997 with respect to legal
harmonization of the member countries with respect to pressure equipment.
The units conform to the following standards:
EN 1050: 1996-11 EN 292-1: 1991-09 EN 292-2: 1991-09
EN 61010-1: 2001 EN 61010-2-10: 1994-07 EN 60204-1: 1997-12
EN 563: 1994-06 EN 61326: 1997-04
EN 378-1:2000-09 EN 378-2:2000-09 EN 378-3:2000-09
EN 378-4:2000-09
JULABO Labortechnik GmbH
Eisenbahnstr. 45
77960 Seelbach / Germany
8

Recirculating Cooler
Warranty conditions
JULABO Labortechnik GmbH warrants its products against defects in material or in workmanship,
when used under appropriate conditions and in accordance with appropriate operating instructions
for a period of ONE YEAR.
Extension of the warranty period – free of charge
With the ‘1PLUS warranty’ the user receives a free of charge extension to the warranty of up to 24
months, limited to a maximum of 10 000 working hours.
To apply for this extended warranty the user must register the unit on the JULABO web site
www.julabo.de, indicating the serial no. The extended warranty will apply from the date of JULABO
Labortechnik GmbH’s original invoice.
JULABO Labortechnik GmbH reserves the right to decide the validity of any warranty claim. In case of
faults arising either due to faulty materials or workmanship, parts will be repaired or replaced free of
charge, or a new replacement unit will be supplied.
Any other compensation claims are excluded from this guarantee.
9

Operating manual
Technical specifications
Professional Series SC 2500a SC 2500w
Working temperature ranges:
Standard unit °C +5 ... +35 +5 ... +35
Option Low Temp °C -20 ... +35 -20 ... +35
Option Low /HighTemp I °C -20 ... +80 -20 ... +80
Temperature stability °C 0.1 0.1
Absolute Temperature Calibration ±3 ±3
Heater wattage (at 230 V) Option H1 kW 1.0 1.0
Cooling capacity °C +20 0 -10 +20 0 -10
Medium ethanol kW 2.5 1.5 0.9 2.5 1.5 0.9
Refrigerant R404A R404A
Pump capacity P0 (Standard) / P3 * (Option)
see table 1 page 11
Flow rate P0 / P3 L/min at 0 bar 48 / 33 48 / 33
Pressure max. P0 / P3 bar at 0 liter 1.78 / 3.5 1.78 / 3.5
Overall dimensions (WxDxH) cm 49x62/105 49x62/105
Filling volume liters 21 ... 33 21 ... 33
Weight kg 135 122,5
Ambient temperature °C 5 ... 40 5 ... 40
Mains power connection ±10 % V/ Hz 230 / 50 230 / 50
Current consumption without heater A ------- -------
Current consumption with 1kW heater A 14.8 15.1
Mains power connection V/ Hz 208-230/60 208-230/60
Current consumption (at 230 V) without heater A ------- -------
Current consumption (at 230 V) 1kW heater A 14.8 15.1
All measurements have been carried out at: rated voltage and frequency ambient temperature: 20 °C
Technical changes without prior notification reserved.
* Pump P3- reduces cooling capacity by 0.3 kW
10

Recirculating Cooler
Professional series
Temperature selection
digital
via keypad
indication on VFD COMFORT-DISPLAY
remote control via personal computer
indication on monitor
Temperature indication °C VFD COMFORT-DISPLAY
Resolution °C 0.1
Temperature control
ICC - Intelligent Cascade Control
Electrical connections:
Computer interface RS232
External Pt100 sensor
Optional
Programmer input
-100 °C to 400 °C = 0 - 10 V or 0 - 20 mA or 4 - 20 mA
Input for the signal of a flow meter or external manipulated variable
Temperature recorder outputs 0 - 10 V (0 V = -100 °C, 10 V = 400 °C)
0 - 20 mA (0 mA = -100 °C, 20 mA = 400 °C)
4 - 20 mA (4 mA = -100 °C, 20 mA = 400 °C)
Standby input
for external emergency switch-off
Alarm output
for external alarm signal
Table 1
Pump capacity
Bath fluid: Water, Silicone -oil
XX.XX
PUMP
1
XX.XX
PUMP
2
XX.XX
PUMP
3
Circulating pump:
Flow rate max.
Pressure max.
Lpm at 0 bar
bar at 0 liter
P0 P3 P0 P3 P0
31 30 42 33 48
0.75 1.8 1.2 3.5 1.78
Bath fluid: Galden ®
eg. Fluorinert ® 3283
Pressure max. bar at 0 liter
3.5 1,78
Notice:
If Galden ® or Fluorinert ® is used the the charge of the motor increases. Wrong adjustment
causes overheating and eventually destruction of the motor.
With the circulation pump P0 a maximum pump pressure stage >PUMP 2< may be
adjusted.
With the circulation pump P3 a maximum pump pressure stage >PUMP 1< may be
adjusted..
The pump type can be recognized in the order no. on the name plate.
95 xx xxx _ xx PX xx
11

Operating manual
Only for water-cooled models:
Cooling water pressure (IN / OUT ) max. 6 bar
Difference pressure (IN - OUT )
3.5 to 6 bar
Cooling water temperature

ESC
130
60
180
30
10 220
°C
ENERGENCY STOP
OFF
ON
Recirculating Cooler
Operating instructions
1. Operating controls and functional elements
Front view
5 4 3 2 1
Rear view
12 16
T
NOT-AUS
6
7
8
19
22
23
9
SC 2500
21
24
25
10
26
1 Mains power switch
2 Emergency stop switch
3
130
60
180
30
10 220
°C
4 Keypad
Adjustable excess temperature protection according to IEC 61010-2-010
Start / stop key
Key for selecting the working temperature - Setpoint 1, 2, 3
Key for selecting the warning and safety values
MENU button - for selecting the menu functions
Cursor keys
(left or right)
13

Operating controls and functional elements
Edit keys
Enter key
(increase or decrease)
1) Store value / parameter
2) Next lower menu level
5
Escape key
1. Cancel entries
2. Return to a higher menu level
VFD COMFORT-DISPLAY
Header: Control indicators see sections 2.1 and 2.2
Line 1: Actual value internal or external
The display is depending on the selected control mode in the
menu > Control < (internal or external).
Line 2: Working temp. setpoint, constantly S xxx.xx
Line 3: Actual value (E = external or I = internal)
Alternating with the display in line 1
XXXXX
S xxxxx
FL GOOD
XXXXX
S xxxxx
R 005
Use the key to indicate further values in line 3. However, the functions of
these keys are different with the programmer started.
PI Capacity in % - with manipulated variable set to >controlSERIALEPROGFLOWRATEGOOD< = Pump switched on
R Resistifity measurement and actual value display in the range from
0.5 ... 5 MOhm/cm
Press to return to actual value (E = external or I = internal)
5.1 Control indicators in the header:
Heating / Cooling / Alarm /
Remote control
5.2 Control indicators in the header:
Temperature indication Internal or External actual value
Temperature indication in °C (°F not possible on this unit)
5.3
Display for the adjusted pump pressure stage.
Adjustable via the
button, in the menu >PUMP

Recirculating Cooler
Rear view
12
RS232
Interface RS232: remote control via personal computer
Option: Electronic module
13
Alarm output (for external alarm signal)
14
15
ALARM
STAND-BY
REG+E-PROG
Standby input (for external emergency switch-off)
Programmer input and temperature recorder output
16
Socket for external measurement and control sensor
or external setpoint programming
ext Pt100
19 2 Connectors for solenoid valve. 230 V / max. 0.1 A
No control voltage in the -OFF- condition
20 2 Safety cutouts: Mains fuses 16 A
0
1
Motor protection circuit breaker for compressor motor
21 Mains power cable with plug
22
23
Pump connectors: 3/4” NPT Feed Return
24 Overflow connector with colar nut
Closable when using e.g. 3M Fluorinert ® as temperature liquid.
25 Drain port with cup nut
Recommendation:
Before filling please install a drain cock at the discharge nozzle.
Connection: ½ " (not included in delivery)
26
OUT IN
Only for water cooled models: Cooling water OUTLET and INLET
15

Safety notes for the user
2. Safety notes for the user
In addition to the safety warnings listed above, warnings are posted throughout the
manual. These warnings are designated by an exclamation mark inside an equilateral
triangle. „Warning of a dangerous situation (Attention ! Please follow the documentation).“
The danger is described according to an alarm keyword.
Read and follow these important instructions.
Warning:
Describes a possibly highly dangerous situation. If this is not avoided, serious injury and
danger to life could result.
Caution:
Describes a possibly dangerous situation. If this is not avoided, slight or minor injuries
could result. A warning of possible damage can also be contained in the text.
Notice:
Describes a possibly harmful situation. If this is not avoided, the product or anything in its
surroundings can be damaged.
3. Preparations
3.1. Installation
• Place the unit in an upright position.
For better stability, apply the holding brakes on the front casters.
• The place of installation should be large enough and provide sufficient
air ventilation to ensure the room does not warm up excessively
because of the heat the instrument radiates to the environment. (Max.
permissible ambient temperature: 40 °C).
With regard to a disturbance in the cooling loop (leakage), the
guideline EN 378 prescribes a certain room space to be available for
each kg of refrigerant.
The necessary amount of refrigerant is specified on the type plate.
> For 0.48 kg of refrigerant R404A, a room space of 1 m 3 is required.
• Keep at least 20 cm of open space on the front and rear venting grids.
• Do not set up the unit in the immediate vicinity of heat sources and do
not expose to sun light
• Before operating the unit after transport, wait about one hour after
setting it up. This will allow any oil that has accumulated laterally
during transport to flow back down thus ensuring maximum cooling
performance of the compressor.
Recommendation:
Before filling please install a drain cock at the discharge nozzle. (25)
Connection: ½ " (not included in delivery)
16

Recirculating Cooler
Only for water cooled models:
Ensure circulation of cooling water by connecting the tubing to cooling
water inlet and outlet on the rear of the recirculating cooler.
Cooling water connectors
G3/4” external thread
Cooling water temperature

Preparations
3.2.1. External control
Pt100
The recirculating cooler is intended for internal and external temperature
control. Switching is carried out in the submenu >Control< (see page 30)
IMPORTANT: Measures for external control
For external control and temperature measurement an external
Pt100 sensor must be connected to the socket (17) on the rear of the
recirculating cooler.
Order No. Description Material cable
8 981 003 200 x 6 mm dia., stainless steel 1.5 m
8 981 005 200 x 6 mm dia., glass 1.5 m
8 981 006 20 x 2 mm dia., stainless steel 1.5 m
8 981 010 300 x 6 mm dia., stainless steel 1.5 m
8 981 013 600 x 6 mm dia., stainless steel/Teflon 3 m
8 981 014 1200 x 6 mm dia., stainless steel/Teflon 3 m
8981103 Extension cable for Pt100 sensor 3.5 m
8 981 020 M+R in-line Pt100 sensor
The M+R in-line Pt100 sensor is a flow sensor and can be installed in
the loop circuit.
Pt100
M+R
3.3. Bath fluids
Caution:
Carefully read the safety data sheet of the bath fluid used, particularly with regard to
the fire point!
If a bath fluid with a fire point of ≤ 65 °C is used, only supervised operation is possible.
Water:
The quality of water depends on local conditions.
Ferrous water can cause corrosion - even on stainless steel.
Chloric water can cause pitting corrosion.
Water/glycol mixture:
Water evaporates and thus the mixture may become flammable. In the heating phase,
a fire may be caused due to the hot surface temperature of the heater.
Fill up water in time and check the mixing ratio in regular intervals (e.g. using an
appropriate device).
Recommended bath fluids:
Bath fluids Temperature range Flash point fire point
water 5 °C ... +80 °C
mixture water/glycol -30 °C ... +50 °C
JULABO Thermal G -30 °C ... +80 °C ---
JULABO Thermal H5S -50 °C ... +105 °C >110 °C >130 °C
18

Bath fluids Temperature range Flash point fire point
JULABO Thermal H10S -20 °C ... +180 °C >175 °C >210 °C
Recirculating Cooler
3M Fluorinerts ®
H-Galden ®
read the safety data sheet
read the safety data sheet
ATTENTION: The maximum permissible viscosity is 30 mm 2 /s .
Order No. 10 liters Bath fluids Order No. 5 liters
8 940 124 Thermal G 8 940 125
8 940 106 Thermal H5S 8 940 107
8 940 114 Thermal H10S 8 940 115
Notice:
Please contact JULABO before using other than recommended bath fluids.
JULABO takes no responsibility for damages caused by the selection of an unsuitable
bath fluid.
Unsuitable bath fluids are liquids which e.g.
• are very highly viscous
(much higher than 30 mm 2 /s at the respective working temperature)
• have corrosive characteristics or
• tend to cracking.
Caution:
The temperature controlling i.e. of fluids in a reactor constitutes normal circulator
practice.
We do not know which substances are contained within these vessels.
Many substances are:
• inflammable, easily ignited or explosive
• hazardous to health
• environmentally unsafe
i.e.: dangerous
The user alone is responsible for the handling of these substances!
The following questions shall help to recognize possible dangers and to reduce the
risks to a minimum.
• Are all tubes and electrical cables connected and installed?
Note:
sharp edges, hot surfaces in operation, moving machine parts, etc.
• Do dangerous steams or gases arise when heating?
Is an exhaust needed when working?
• What to do when a dangerous substance was spilled on or in the unit?
Before starting to work, obtain information concerning the substance and
determine the method of decontamination.
19

Preparations
3.3.1. Tubing
Recommended tubing:
Textile-reinforced tubing
Maximum pressure
> 4.5 bar
Warning: Tubing:
At high working temperatures the tubing used for temperature application and cooling
water supply represents a danger source.
A damaged tubing line may cause hot bath fluid to be pumped out within a short time.
This may result in:
• Burning of skin
• Difficulties in breathing due to hot atmosphere
Safety recommendations
• Employ suitable connecting tubing.
• Make sure that the tubing is securely attached.
• Avoid sharp bends in the tubing, and maintain a sufficient distance from
surrounding walls.
• Regularly check the tubing for material defects (e.g. for cracks).
• Preventive maintenance: Replace the tubing from time to time.
3.4. Filling
Liquid level
• Connect the tubing from the external system to the pump
connectors and check for leaks.
• Check to make sure that the drain tap (25) is closed.
• Remove the cap from the filling opening (9).
• Fill the bath tank using a funnel while monitoring the filling level
(6).
Filling of the external system.
• Turn the mains switch (1) on
• Press the key for filling the cooling loop for the external
system.
Make sure that air can evacuate from the system..
• Check the filling level (6) and keep on filling the bath liquid using
the funnel.
• After having finished the filling process, the liquid level should be
below “MAX”.
• Close the filling opening.
Notice:
Pay attention to the thermal expansion of bath oil during heating to avoid
overflowing of the liquid.
20

Recirculating Cooler
3.5. Draining
• Turn the mains switch (1) off.
• Place a suitable vessel for accepting the used bath liquid
underneath the drain.
• Unscrew the cup nut (A) from the drain port (25) and
empty the unit completely.
A
• Close the drain port.
Notice:
Exercise caution when emptying hot bath fluids!
Check the temperature of the bath fluid prior to draining (by switching the unit on for
a short moment, for example). Store and dispose the used bath fluid according to
the laws for environmental protection.
21

Operating procedures
4. Operating procedures
4.1. Power connection
Caution:
Only connect the unit to a power socket with earthing contact (PE – protective earth)!
We disclaim all liability for damage caused by incorrect line voltages!
Check to make sure that the line voltage matches the supply voltage
specified on the identification plate. Deviations of ±10 % are permissible.
4.2. Switching on / Start - Stop
Switching on:
• Turn on the mains power switch (1).
During the self-test all segments of the VFD-Info-Display light up.
Then the software version number (example: V 4x.1x) and the order
number of the recirculating cooler appears.
(Example: [ 95 20 025 03 P0H1 ] ).
The display „OFF“ or „R OFF“ indicates the unit is ready to operate.
-OFF-
S 150.0
I 24.6
XXXXX
95xxxxx
-xxPxHx
The recirculating cooler enters the operating mode activated before
switching the recirculating cooler off:
keypad control mode (manual operation)
or
remote control mode (operation via personal computer).
Start: Press the start/stop key .
The actual bath temperature is displayed on the VFD COMFORT-
DISPLAY.
Stop: Press the start/stop key .
The VFD COMFORT-DISPLAY indicates the message „OFF“.
Autostart: see chapter 7.3.2.
A-START – Autostart
The Autostart function enables the start of the recirculating cooler
directly by pressing the mains switch or using a timer.
22

Recirculating Cooler
5. Setting the temperatures
Factory settings:
SETP 1 25 °C
SETP 2 37 °C
SETP 3 70 °C
Press the key to call up the menu for temperature selection.
3 different working temperatures are adjustable. Their values are freely
selectable within the operating temperature range.
This setting may be carried out with the recirculating cooler being in the
Start or Stop condition!
Example: Setting working temperature "SETPoint 3"
XXXXX
SETP 3
70.0
XXXXX
SETP 3
85.0
1. Press the key until the desired menu window is indicated on the
VFD COMFORT-DISPLAY
Example: SETP 3 / 70.0 °C (last digit blinks)
2. Change the value to 85 °C.
Use the cursor keys to move left or right on the display until the
numeral you wish to change blinks.
Use the increase/decrease arrows
numeral (-, 0, 1, 2, 3, ... 9).
see example left: SETP 3 / 85.0.
to change the selected
3. Press enter to store the value.
In the >Start< condition this value is immediately used for controlling the
working temperature.
The indication on the VFD COMFORT-DISPLAY is updated.
The heater control indicator blinks.
Notice: See SETMAX and SETMIN in chapter 7.5.
Example: Selecting the working temperature
MENU LIMITS
SETP 1
SETP 2
SETP 3
1. Press the key until the desired menu item is indicated on the VFD
COMFORT-DISPLAY.
2. Press enter .
The recirculating cooler uses the new working temperature value for
temperature control.
23

Safety installations, warning functions
6. Safety installations, warning functions
Settings for the excess temperature protection > SAFETMP< according to
IEC 61010-2-010 and for the high > OVERTMP< and low> SUBTMP<
temperature warning functions are made in a menu that is called up with the
‣ SAFETMP
‣ OVERTMP
‣ SUBTMP
‣ LIMITSR
key .
Menu item > LIMITSR OVERTMP< and >SUBTMP< choose between a
warning message being signalled or a complete shutdown of the main
functional elements such as heater and circulating pump being effected.
6.1. Excess temperature protection
This safety installation is independent of the control circuit. When the
temperature of the bath fluid has reached the safety temperature, a
complete shutdown of the heater and pump is effected.
XXXXX
ALARM
CODE 1
The alarm is indicated by optical and audible signals (continuous tone)
and on the VFD COMFORT-DISPLAY appears the error message
"ALARM-CODE 1".
Setting range: 20 °C ... 220 °C
XXX.X
SAFETMP
100
80
40
0
160
240
320
°C°C
1. Press the button until the menu item > SAFETMP < is
displayed.
2. Set the new cut-out value using a screwdriver via the VFD
COMFORT-DISPLAY (Example: 100 °C)
3. Press to update the display immediately, or the unit
automatically returns to the effective display after
about 30 seconds .
Recommendation:
Set the excess temperature protection at 5 to 10 °C above the working
temperature setpoint.
Warning:
The excess temperature protection >SafeTemp< should be set at least 25 °C below
the fire point of the bath fluid used.
In the event of wrong setting there is a fire hazard!
We disclaim all liability for damage caused by wrong settings!
24

Recirculating Cooler
6.1.1. Early warning system, low level protection
(patented)
This low level protection is independent of the control circuit and is
divided in two sections.
1. Switch in stage 1 recognizes a critical fluid level .
An audible warning (interval tone) sounds and a message
appears on the VFD COMFORT-DISPLAY.
XXXXX
WARNING
CODE 40
Refill bath fluid!
2. Switch in stage 2 recognizes a low fluid level .
If stage 2 of the low level protection device (according to
IEC 61010-2-010) is triggered, a complete shutdown of
the heater and circulating pump is effected.
A continuous alarm tone sounds and a message
>ALARM< >CODE 01< appears on the VFD COMFORT-
DISPLAY.
XXXXX
ALARM
CODE 1
Turn off the unit with the mains switch, refill bath fluid and
turn the unit on again!
Important: Check the safety installations from time to time.
See page 61
Warning:
For refill always use the same bath fluid type that is already in the bath.
Bath oils must not contain any water contaminants and should be pre-heated to the
actual bath temperature! Explosion hazard at higher temperatures!
25

Safety installations, warning functions
6.2. Over and Sub temperature warning functions
Over temperature
Sub temperature
XXXXX
SUBTMP
-94.9
If for a sensitive temperature application task adherence to a working
temperature value > SETP < is to be supervised, then set over and sub
temperature warning values.
In the example below, the > SETP < of 85 °C is surrounded by the values
> OVERTEMP < 87 °C and > SUBTEMP < 83 °C. The electronics
immediately registers when the actual temperature attains a temperature out
of the limits and it follows a reaction according to what is set in the menu
item >LIMITSR OVERTMP < or
>SUBTMP< is displayed.
2. Set value:
Use the cursor keys to move left or right on the display until the
numeral you wish to change blinks.
Use the increase/decrease arrows
numeral (-, 0, 1, 2, 3, ... 9).
to change the selected
3. Press enter to store the value.
The warning functions are only triggered when the actual bath
temperature, after start from the „OFF“ or „rOFF“ mode, lies within the
set limits for 3 seconds.
Recommendation:
Set the high temperature warning value > OVERTMP < at 5 °C to 10 °C
above the working temperature setpoint.
Set the low temperature warning value > SUBTMP < at 5 °C to 10 °C below
the working temperature setpoint.
26

Recirculating Cooler
6.2.1. Change-over of the warning function to shutdown function
For the two menu items > OVERTMP< and >SUBTMP< choose between a
warning message being signalled or a complete shutdown of the main
functional elements such as heater and circulating pump being effected (see
page 26).
• Setting >WARNING<
An audible warning (interval tone) sounds and a meassage appears on
the VFD COMFORT-DISPLAY.
Factory setting:
>WARNING<
XXXXX
WARNING
CODE 03
OVERTMP
or
XXXXX
WARNING
CODE 04
SUBTMP
• Setting >ALARM<
A complete shutdown of heater and circulating pump is effected.
An audible alarm (continuous tone) sounds and a message appears on
the VFD COMFORT-DISPLAY.
XXXXX
ALARM
CODE 03
OVERTMP
oer
XXXXX
ALARM
CODE 04
SUBTMP
1. Press the button until the menu item >LIMITSR< is displayed.
2. Select the parameter with the keys .
(>WARNING< or >ALARM

Menu functions
7. Menu functions
The term „menu functions“ refers to adjustments such as
‣ PUMP Electronically adjustable pump capacity page 29
‣ CONTROL Intelligent Cascade Control, control parameters page 30
CONTROL - internal or external control
ELFTUNING
DYNAMIC - internal
COSPEED - external
Control parameters - XP, TN, TV internal
Control parameters - XP, TN, TV, XPU external
‣ CONFIG Configurationen of the unit page 36
SET (Setpoint) – keypad control or remote control
A-START – Autostart
OFF MODE – Motor on / off
RESET – Factory settings
ACTVAR – actuating variable
TIME / DATE – Setting time and date
‣ SERIAL Adjustable interface parameters page 42
BAUDRAT, H-SHAKE, PARITY
(Baud rate, Handshake, Parity)
‣ LIMITS Limits to temperature or capacity page 43
SET MAX / MIN - Maximum and minimum setpoint
HEAT MAX - Adjusted maximum heating
COOL MAX - Adjusted maximum cooling
INTERN MAX / MIN – Limitation of the working temperature range
BAND HIGH / LOW – Band limit
‣ PROGRAM Integrated programmer page 45
‣ ADJUST ATC - Absolute Temperature Calibration, page 49
Sensor calibration, 3-point calibration
‣ ANALOG
Indication only when
the Analog Interface
Modul is mounted.
Analog inputs/outputs page 53
F-ALARM – Function at Alarm
A-ALARM – Type of Alarm
EX-STBY - STAND-BY input
CHANNEL – Output 1, 2, 3
EPROG – External programmer input
28

Recirculating Cooler
• Menu level 1:
Example:
Menu level 1
Continue: Press
to quit the menu.
Press the button to scroll in menu level 1.
If the desired (‣) menu item is indicated on the VFD COMFORT-
DISPLAY, press enter to change to menu level 2.
• Menu level 2:
Press the button to scroll in the selected menu item, line 3 of the
display blinks.
If a value is set or a parameter selected, press enter to confirm.
Each input can be cancelled with the
the next higher menu level.
. The cursor then returns to
Legend:
Continue: Press
/ or
The display remains visible for approx. 30 seconds
within this period,
or press the button to scroll in the menu level
or press to return to the next higher menu level.
. Start to set a value
7.1. MENU PUMP - Setting the pump pressure
The pressure of the circulating pump is adjustable in stages. After setting,
the VFD COMFORT-DISPLAY indicates the corresponding value.
Adjustable pump capacity stage 1 ... 3
Examples:
Illuminated display: for pump pressure
Display for the adjusted pump pressure stage.
XXX.X
PUMP
2
1. Press the button until the menu item > MENU / PUMP < is
displayed.
2. Press enter to indicate the parameter.
3. Select the parameter with the keys (1 ... 3).
4. Press enter to store the selected parameter.
Continue: Press or .
Notice:
Pump capacity: See Table 1 page 11
29

Menu functions
7.2. MENU CONTROL – Control parameters
CONTROL: Press enter to switch to menu level 2
>CONTROL< (INT / EXT )
>SELFTUN<
>DYNINT<
(ALWAYS / OFF / ONCE)
(APER / NORM)
>XP INT< (0.1 ... 99.9)
>TN INT< (3 ... 9999)
or
>TV INT< (0 ... 999)
>CONTROL<
>SELFTUN<
( INT / EXT)
(ALWAYS / OFF / ONCE)
>COSPEED< (0 ... 5)
>XP EXT< (0.1 ... 99.9)
>TN EXT< (3 ... 9999)
> TV EXT (0 ... 999)
>XPU EXT< (0.1 ... 99.9)
7.2.1. CONTROL – internal / external control
The recirculating cooler is conceived for internal and external
temperature control. Switching is carried out in this submenu.
Depending on what is set, only the respective set of parameters is
indicated.
Factory setting:
INT
Possible parameters:
INT internal temperature control
EXT external temperature control with external Pt100 sensor
The control type can only be adjusted in the -OFF- condition
1. Press the button until the submenu >CONTROL< is displayed.
2. Select the parameter with the keys (INT / EXT).
3. Press enter to store the selected parameter.
Continue: Press
or
30

Recirculating Cooler
Pt100
IMPORTANT:
Additional measures for external temperature control.
Connect a Pt100 sensor to the socket on the rear of the recirculating cooler.
Suggested adjustments for external temperature control:
BAND HIGH / LOW and INTERN MAX / MIN
see chapter > LIMITS < on page 43.
Sensor calibration of the external Pt100 sensor is carried out in the >MENU /
ADJUSTATC SEN / EXT< (see page 49).
Notice:
Place the external sensor into the bath medium and securely fix the sensor.
7.2.2. SELFTUNING
XXXXX
SELFTUN
ALWAYS
Factory setting:
ONCE
Selftuning:
When performing a selftuning for the controlled system (temperature
application system), the control parameters Xp, Tn and Tv are
automatically determined and stored.
Possible parameters:
OFF - no selftuning
The control parameters ascertained during the last identification are
used for control purposes.
ONCE - single selftuning (factory setting)
The instrument performs a single selftuning of the controlled system
after each start with the start/stop key or after receiving a start
command via the interface.
ALWAYS - continual selftuning
The instrument performs a selftuning of the controlled system
whenever a new setpoint is to be reached.
Use this setting only when the temperature application system
changes permanently.
1. Press the button until the submenu > SELFTUN < is displayed.
2. Select the parameter with the keys .
(ALWAYS / OFF / ONCE)
3. Press enter to store the selected parameter.
Continue: Press
or
31

Menu functions
7.2.3. DYN INT - Dynamic internal
This parameter affects the temperature pattern only in
case of internal control.
Factory setting: APER (aperiodic)
NORM
°C
temp. stability
APER
Setpoint
NORM
°C
temp. stability
APER
temperature ramp
t
t
Possible parameters:
NORM
Allows for reaching the setpoint faster, but
overshooting of up to 5 % is possible.
APER Target temperature is attained without
overshooting.
With both adjustments an adequate temperature
stability is reached after approximately the same time.
1. Press the button until the submenu > DYN INT < is displayed.
2. Select the parameter with the keys .
(NORM / APER)
3. Press enter to store the selected parameter.
Continue: Press
or
7.2.4. Control parameters – XP, TN, TV internal
The control parameters preset in factory are in most cases adequate for
achieving an optimum temperature pattern for the samples requiring
temperature application.
Each parameter may be manually set via the keypad if necessary, to
allow optimum control performance.
Proportional range >Xp<
The proportional range is the range below the selected temperature value
in which the control circuit reduces the heating power from 100 % to 0 %.
Setting range:0.1 ... 99.9
Setting range:1 ...9999
Resetting time >Tn< (Integral component)
Compensation of the remaining control deviation due to proportional
regulation. An insufficient resetting time may cause instabilities to occur.
Excessive resetting time will unnecessarily prolong compensation of the
control difference.
32

Recirculating Cooler
Setting range: 0 ... 999
Lead time >Tv< (Differential component)
The differential component reduces the control settling time. An
insufficient lead time will prolong the time required to compensate for
disturbance effects and cause high overshooting during run-up. An
excessive lead time could cause instabilities (oscillations) to occur.
1. Press the button until the desired submenu is displayed -
XP INT, TN INT, TV INT.
2. Set value:
Use the cursor keys to move left or right on the display until
the numeral you wish to change blinks.
Use the increase/decrease arrows
numeral (-, 0, 1, 2, 3, ... 9).
to change the selected
3. Press enter to store the value.
Continue: Press / or
Optimization instructions for the PID control parameters:
°C
optimum setting
The heat-up curve reveals inappropriate control
settings.
t
Inappropriate settings may produce the following heat-up curves:
Xp too low
Tv/Tn too low
°C
°C
°C
t
Xp too high or Tv too high
°C
t
Tv/Tn too high or Xp too high
t
t
33

Menu functions
7.2.5. COSPEED - external
This parameter affects the temperature pattern only in case of external
control.
Possible parameters: 0.0 ... 5.0
1. Press the button until the submenu > COSPEED < is
displayed.
2. Set value:
Use the cursor keys to move left or right on the display until
the numeral you wish to change blinks.
Use the increase/decrease arrows
numeral (-, 0, 1, 2, 3, ... 9).
to change the selected
3. Press enter to store the value.
Continue: Press / or
°C
During selftuning, the control parameters Xp, Tn and Tv of a controlled
system are automatically determined and stored. Depending on the
controlled system, time for tuning can be unequally longer. This
controller layout allows protection of sensitive objects requiring
temperature application.
5
3
Int. temperature
Ext. temperature
0
Setpoint
As soon as a co-speed factor is set, it is
considered for calculating the control
parameters. As shown in the diagram,
tuning times become shorter the higher the
co-speed factor is, but overshooting can
happen in the internal system.
t
34

Recirculating Cooler
7.2.6. Control parameters – XPU, XP, TN, TV external
The control parameters preset in factory are in most cases adequate for
achieving an optimum temperature pattern for the samples requiring
temperature application.
Each parameter may be manually set via the keypad if necessary, to
allow optimum control performance.
Setting range: 0.1 ... 99.9
Setting range: 1 ...9999
Setting range: 0 ... 999
Setting range: 0.1 ... 99.9
1. Press the button until the desired submenu is displayed -
XP EXT, TN EXT, TV EXT, XPU EXT.
2. Set value:
• Use the cursor keys to move left or right on the display
until the numeral you wish to change blinks.
• Use the increase/decrease arrows to change the
selected numeral (-, 0, 1, 2, 3, ... 9).
3. Press enter to store the value.
Continue: Press / or
Proportional range >Xpu<
The proportional range Xpu of the cascaded controller is only needed for
external control.
35

Menu functions
7.3. MENU CONFIG - configuration
CONFIG: Press enter to switch to menu level 2
>SETP< (KEY / SERIAL / PT100 / EPROG*)
Keypad control or remote control
>A-START<
Autostart on / off
>OFFMODE<
Motor on / off
>RESET<
(OFF / ON)
(PMP OFF / PMP ON)
( NO / YES ) Factory settings
>ACTVAR< (CONTROL / SERIAL / EPROG* )
ACTuating VARiable
>TIME<
(hh : mm ) Setting time
>DATE<
(TT/MM.JJ ) Setting date
EPROG* Indication only when electronic module is mounted.
36

Recirculating Cooler
7.3.1. SETPOINT – Keypad control or remote control
The recirculating cooler provides four possibilities for setpoint setting.
1. Press the button until the submenu > SETP < is displayed.
2. Select the parameter with the keys
(KEY / SERIAL / PT100 / EPROG)
3. Press enter to store the selected parameter.
Continue: Press / or
KEY – Setpoint setting with the keys and
or the integrated programmer.
S XX.XX
I XX.XX KEY
-OFF-
S XX.XX SERIAL
I XX.XX
PT100 - Setpoint setting via the analog socket „ext. Pt100“ using an
-OFFexternal
temperature sensor or an appropriate voltage/current
ST XX.XX
I XX.XX
PT100 source.
-OFF-
SP XX.XX
I XX.XX EPROG
Factory setting: KEY
The selected mode is
indicated on the VFD
COMFORT-DISPLAY
-OFF-
SERIAL - Setpoint setting via the serial RS232 interface through a PC
or superordinated data system.
Important:
Connect the recirculating cooler to a PC using an interface
cable.
Check the interface parameters of both interfaces (on
recirculating cooler and PC) and make sure they match.
(see chapter 11.1. Setup for remote control page 64)
EPROG - Can only be adjusted when an electronic module with analog
connections is used (option).
Setpoint setting via the analog interface REG+E-PROG connection
with an external voltage or current source or a programmer.
Important:
Connect the external voltage or current source or a programmer to
the circulator via the socket REG+E-PROG (see page 56).
In the menu >MENU ANALOG< set the parameter >EPROG< and
the input variables (see page 57).
The E-Prog input can only be used either under menu item > SETP
< or under menu item > ACTVAR <
(see page 40).
37

Menu functions
7.3.2. A-START – Autostart
XXXXX
A-START
OFF
Factory setting: OFF
The AUTOSTART function (automatic start mode) is allowing the start of
the instrument directly by pressing the mains power switch or using a
timer.
1. Press the button until the submenu > A-START < is displayed.
2. Select the parameter with the keys (OFF / ON).
3. Press enter to store the selected parameter.
Continue: Press / or
Possible parameters:
ON - AUTOSTART on
OFF - AUTOSTART off
Note:
The temperature system has been configured and supplied by JULABO
according to N.A.M.U.R. recommendations. This means for the start
mode, that the unit must enter a safe operating state after a power failure
(non-automatic start mode). This safe operating state is indicated by
OFF, resp. R OFF on the VFD COMFORT-DISPLAY. A complete
shutdown of the main functional elements such as heater and circulating
pump is effected simultaneously.
The values set on the recirculating cooler remain stored, and the unit is
returned to operation by pressing the start/stop key (in manual control
mode).
In remote control mode, the values need to be resent by the PC via the
interface.
Should such a safety standard not be required, the AUTOSTART
function (automatic start mode) may be activated, thus allowing the start
of the instrument directly by pressing the mains power switch or using a
timer.
The AUTOSTART function can only be used, if setpoint setting is carried
out via > KEY EPROG < or >PT100

Recirculating Cooler
7.3.3. OFF-MODE – Pump motor on / off
XXXXX
OFFMODE
PMP OFF
Factory setting:
PMP OFF
Normally the circulating pump is switched via the start/stop signal.
However, if circulation should be maintained also for the -OFF- condition,
the parameter >PMP ON< needs to be set.
Possible parameters:
PMP ON Pump motor on
PMP OFF Pump motor off
1. Press the button until the submenu > OFFMOD < is displayed.
2. Select the parameter with the keys .
(PMP ON / PMP OFF)
3. Press enter to store the selected parameter.
Continue: Press / or
In case of an alarm state, a shutdown of the pump motor is still
effected.
7.3.4. RESET – Factory settings
Use this to reset all values to factory setting (except date and time).
A RESET can only be carried out in the -OFF- condition.
Factory setting:
NO
Possible parameters:
NO / YES
1. Press the button until the submenu > RESET < is displayed.
2. Select the parameter with the keys (NO / YES).
3. Press enter to store the selected parameter.
As long as the message -RUN- appears all parameters a reset to
factory settings.
39

Menu functions
7.3.5. ACTVAR - actuating variable
XXXXX
ACTVAR
CONTROL
Factory setting:
CONTROL
The variable (ACTuating VARiable) corresponds to the extent to which
the heater or cooling machine of the recirculating cooler is controlled.
Heat or cold is applied to the bath according to this variable. If this
happens with the control electronics of the recirculating cooler, called
> CONTROL < in this particular case, the bath temperature is exactly
heated and maintained constant at the adjusted setpoint.
Programming of variables for the parameters > SERIAL < or >
EPROG < is only accepted, if the unit is in Start mode.
1. Press the button until the submenu > ACTVAR < is displayed.
2. Select the parameter with the keys
(CONTROL / SERIAL / EPROG )
3. Press enter to store the selected parameter
Continue: Press / or
XXXXX
ACTVAR
SERIAL
XXXXX
ACTVAR
EPROG
Possible parameters:
CONTROL – The internal control electronics of the recirculating cooler
controls the heater and cooling machine. Self-tuning is possible.
SERIAL – The heater or cooling machine receives the control signal via
the serial interface. Self-tuning is not possible.
EPROG - The heater or cooling machine receives the control signal via
the E-Prog input. Self-tuning is not possible.
Important:
Under >MENU ANALOG< set the input variable to
>EPROG x / ACTVAR< (see page 57).
XXXXX
EPROG U
ACTVAR
Example: EPROG U / ACTVAR
Note:
The E-Prog input can only be used either under menu item
> SETP < (page 37) or under menu item > ACTVAR

Recirculating Cooler
Warning:
The working temperature range of the recirculating cooler is determined during
configuration. If set to >CONTROL SERIAL < and > EPROG TIME < or > DATE < is
displayed.
2. Setting time / date:
Use the cursor keys to move left or right on the display until
the numeral you wish to change blinks.
Use the increase/decrease arrows
numeral (-, 0, 1, 2, 3, ... 9).
3. Press enter to store the value.
to change the selected
Continue: Press / or
Clock: Only hours and minutes are set.
Settings are checked for plausibility.
41

Menu functions
7.4. MENU SERIAL - BAUDRATE, HANDSHAKE, PARITY
XXXXX
MENU
SERIAL
SERIAL: Press enter to switch to menu level 2
>BAUDRAT<
Factory settings:
4800 Bauds
even
hardware handshake
>PARITY<
>H-SHAKE<
For communication between recirculating cooler and a PC or a
superordinated process system the interface parameters of bath units
must be identical.
1. Press the button until the desired menu item is displayed.
2. Select the parameter with the keys .
3. Press enter to store the selected parameter.
Continue: Press / or
Adjustable interface parameters
BAUDRATE 4800 bauds
9600 bauds
PARITY
no
odd
even
HANDSHAKE
SOFT =
HARD =
software handshake
hardware handshake
Data bits = 7; Stop bits = 1
42

Recirculating Cooler
7.5. MENU LIMITS
XXXXX
MENU
LIMITS
LIMITS: Press enter to switch to menu level 2
>SET MAX<
>SET MIN<
>HEATMAX<
>COOLMAX<
>INT MAX<
>INT MIN<
>BAND H<
In case of external control
these menu items are
additionally indicated.
>BAND L<
1. Press the button until the desired submenu is displayed
2. Set value:
Use the cursor keys to move left or right on the display until
the numeral you wish to change blinks.
Use the increase/decrease arrows
numeral (-, 0, 1, 2, 3, ... 9).
to change the selected
3. Press enter to store the value.
Continue: Press / or
Factory settings
XXXXX
SET MAX
300.00
XXXXX
SET MIN
-94.99
SETPOINT MAX / MIN - Maximum and minimum setpoint
Restriction for the adjustable temperature range.
The limitation of the operating temperature range effects the temperature
setting under the menu called up with the key.
It is possible to adjust only working temperatures that lie within the limit
range set here.
Existing settings for SETP 1, 2, 3 and also for >OVERTEMP< and
>SUBTEMP< (see page 26) are automatically defered within the limit
range.
Setting range:: -94.99 °C ... +300.0 °C
43

Menu functions
Factory settings
Adjusted maximum heating / cooling.
Heating and cooling powers of the recirculating cooler are adjustable.
100 % corresponds to the values in the technical specifications of the
equipment.
Setting range:
HEAT MAX – 0 to 100 % in steps of 1 %
COOLING MAX – 0 to 100 % in steps of 1 %
INTERNAL MAX / MIN
Limit setting
Factory settings
XXXXX
INT MAX
300.00
XXXXX
INT MIN
-94.99
> SAFETMP <
Setting range: -94.9 °C ... +300.0 °C
The limits INT MAX and INT MIN are only valid for external control. INT
MAX and INT MIN are used to limit the expected internal bath
temperatures to any upper and lower values. The temperature controller
cannot exceed these limits even if it would be required for reaching the
temperature in the external system. Consequently the external setpoint
may thus not be reached.
Sense of a limit setting:
Protects the bath fluid from overheating.
Prevents an undesired alarm shutdown by the excess temperature
protection - >ALARM CODE 14INTMAX:< to a value at least 5 °C below the >SAFETEMP:<
value.
Protects the pump motor from high viscosity of the bath fluid at low
temperatures.
For recirculating coolers: Freezing protection when using water as
bath fluid.
BAND HIGH / LOW - Band limit
Factory settings:
For the heat-up and cool-down phases different settings to conform to
the requirements of the particular application are possible.
Setting range: 0 ... 200 °C
Using BAND HIGH and BAND LOW, the difference between the
temperatures in the internal bath and the external system can be limited
to any maximum value for the heat-up or the cool-down phase.
During the heat-up phase the difference value always adds to the actual
external temperature. During the cool-down phase, the difference value
is subtracted.
44

°C
200
150
100
75
50
25
Internal bath
external system
BAND HIGH
BAND LOW
Recirculating Cooler
Sense of a band limit:
Ensures gentle heating for the
objects requiring temperature
application.
Protects glass reactors, for
example, from thermal shock.
The INTMAX: and INTMIN: values are
superordinated to this band limit.
10 20 30 40 50 60 10 20 30 40 50 60 10 [min]
t
7.6. MENU PROGRAM – Integrated programmer
XXXXX
MENU
PROGRAM
PROGRAM: Press enter to switch to menu level 2
>PS STEP< Program start at section ....
1 Profil
10 Sections (STEP)
99 Repetitions
> PS RUNS < Number of profile repetitions 1 ... 99
> PS GO < Start type (NOW/TIME)
> P TIME < Start time (hh:mm)
>P DATE< Start date (TT/MM.JJ)
>PS END< Status at the end of the profile (STBY/SETP)
(Standby or last setpoint)
> PE STEP< Edit profile (1 ... 10)
>Px SEP < Target temperature of section ...
>Px TIM< Time period of section ...
>Px DEL<
Delete a section (STEP) (YES/NO)
> PE DEL< Delete a profile (YES/NO)
The integrated programmer allows any desired temperature program
sequences to be realized. Such a temperature sequence is called profile. A
profile consists of individual sections defined by duration (t:) and target
temperature. Target temperature is the setpoint (T:), that is achieved at the
end of a section. The programmer uses time and temperature difference
values within a section to calculate a temperature ramp.
45

Menu functions
PE STEP (No.) 1 2 4 6 8
Px SEP (°C) 100 180 180 75 75
Px TIM (hh.mm) 00:20 00.10 00:20 00:50 00:20
°C
200 Step 1 2 4 6 8
150
100
75
50
25
Example:
10 20 30 40 50 60 10 20 30 40 50 60 10 [min]
t
1. Press the button until the desired submenu is displayed.
2. Set value:
Use the cursor keys to move left or right on the display until the
numeral you wish to change blinks.
Use the increase/decrease arrows to change the selected
numeral (-, 0, 1, 2, 3, ... 9).
or
select the parameter with the keys .
3. Press enter to store the value / parameter
Continue: Press / or
XXXXX
PS STEP
1
XXXXX
PS RUNS
10
XXXXX
PS
GO
TIME
Starting a profile
If a profile is stored, the programmer can be started with one of the 3
menu items.
>PS STEP< (1 ... 10)
Select the section with which the profile should be started. (STEP)
Example: STEP 1
>PS RUNS< (1 ... 99)
Select the number of profile repetitions. Example: RUNS 10
The profile is repeated 10 times.
>PS GO<
The profile can be started immediately with the parameter (NOW),
or at the set time with the parameter (TIME).
Example below: 19 December 2003 14:25 hrs
46

Recirculating Cooler
A
B
C1
C2
D1
D2
XXXXX
S XX.X
STEP X
S XX.X
XXhXXxx
S XX.X
XXhxx
S XX.X
I xxx.x
S XX.X
E xxx.x
S XX.X
RUN
S XX.X
PAUSE
The started programmer
The started programmer indicates the actually calculated setpoint S XX.X in
line 2. This value increases within the time period >Px TIM< until the target
temperature >Px SEP< of the section is reached.
If time in a section is set to „0“, the next section starts only as soon as the
target temperature is reached.
Use the edit keys to scroll in line 3. The display changes in intervals
of approx. 4 seconds between the valid section (STEP X) and
A Remaining time of the valid section or
B Remaining total time: Profile x number of repetitions or
C Actual bath temperature
I xxx.x – internal actual value or
E xxx.x – external actual value
D RUN – the programmer is started or
PAUSE – the profile was interrupted with the key . Time is
stopped and the temperature is maintained constant at the last
calculated setpoint value.
Continue: Press
Interrupting / Termination of a profile
A profile can be terminated by pressing .
Power failure with the programmer started:
– The reaction of the circulator is the same as when switched off and on
again with the mains switch. The VFD COMFORT-DISPLAY indicates
"OFF".
– If the AUTOSTART function is activated, the programmer starts again at
a point approx. 20 seconds before the interruption took place. However,
an uncontrolled change of the bath temperature happened.
XXXXX
TIME
14h25ss
XXXXX
DATE
19/1203
MMJJ
XXXXX
PS END
SETP
Setting time/date for the start
>TIME<
Enter the start time. Example: 14:25 hrs
>DATE<
Enter the start date. Example: 19 December 2003
Check the setting of the internal real time clock (see page 41).
Status at the end of the profile
>PS END< (STBY / SETP)
Set the status for the end of the profile.
With the parameter STandBY the circulator enters the –OFF– state.
With the parameter SETPoint the circulator maintains the temperature at
the value of the last section.
47

Menu functions
Compiling profiles, indicating sections
Example: Section 2
XXXXX
PE STEP
2
XXXXX
P2 SEP
180.0
1 Press the button until the submenu >PE STEP x< is displayed.
1.1 Use the increase/decrease arrows to set the number of the
desired section (1, 2, 3, ... 10).
1.2 Press to enter menu level 3.
Menu level 3:
2 Submenu >Px SEP< (SETPOINT)
Set a temperature value: Example: 180 °C
2.1 Use the cursor keys to move left or right on the display until
the numeral you wish to change blinks.
2.2 Use the increase/decrease arrows to change the selected
numeral (-, 0, 1, 2, 3, ... 9).
2.3 Press enter to store new the value.
XXXXX
P2 TIM
00h10
2.4 Continue: Press
3 Submenu >Px TIM< (TIME)
Set a time. Example: 10 minutes.
3.1 Use the cursor keys to move left or right on the display until
the numeral you wish to change blinks.
3.2 Use the increase/decrease arrows to change the selected
numeral (-, 0, 1, 2, 3, ... 9).
3.3 Press enter to store new the value.
XXXXX
P2 DEL
NO
3.4 Continue: Press
4 Submenu >Px DEL< (DELETE)
Standard setting (NO)
Set the parameter to YES to delete the values in this section.
4.1 If necessary, use the arrows to set the parameter to YES
and press .
5 Press to return to submenu >Px SEP< in menu level 3.
Or
6 Press to return to submenu >PE STEP x< in menu level 2.
XXXXX
P1 xxx
---.-
Sections without value or time indication (including the value 0) are
skipped. But they can be integrated in the profile at a later time.
Example: Section 1
XXXXX
PE DEL
YES
Deleting a profile
>PE DEL< (YES/NO)
Set the parameter to YES to delete all sections >PE STEP / 1 to 10

Recirculating Cooler
7.7. MENU ADJUST – ATC Absolute Temperature Calibration
ATC serves to compensate a temperature difference that might occur
between recirculating cooler and a defined measuring point in the bath
tank because of physical properties.
XXXXX
MENU
ADJUST
ADJUST: Press enter to switch to menu level 2
>ATC SEN <
(INT) or (EXT)
> ATCSTAT < > ATCSTAT <
(ON or OFF)
(ON or OFF)
>C ART >C ART
>1- point 2- point 3- point < - calibration
> TTEMP 1< > TTEMP 1<
> CTEMP 1< > CTEMP 1<
> TTEMP 2< > TTEMP 2<
> CTEMP 2< > CTEMP 2<
> TTEMP 3< > TTEMP 3<
> CTEMP 3< > CTEMP 3<
1. Press the button until the desired submenu is displayed.
2. Set value /parameter:
Use the cursor keys to move left or right on the display until
the numeral you wish to change blinks.
Use the increase/decrease arrows to change the selected
numeral (-, 0, 1, 2, 3, ... 9).
or
select the parameter with the keys .
3. Press enter to store the value / parameter
Continue: Press / or
49

Menu functions
XXX.X
ACT SEN
INT
XXX.X
ACT SEN
EXT
ATC SENSOR - INTERNAL / EXTERNAL
In the first submenu the ATC function is set for the >INT< internal or
>EXT< external temperature sensor.
Calibration can be carried out for the internal temperature sensor and for
the external temperature sensor connected to the socket „ext. Pt100“.
The recirculating cooler is able to store both parameter sets. However,
only the one set under this menu item is indicated.
XXX.X
ATCSTAT
OFF
XXX.X
ATCSTAT
ON
ATC STATUS - ON / OFF
In the second submenu the ATC function for the temperature sensor
selected above is activated >ON< or deactivated >OFFOFF< The controller of the recirculating cooler uses the original
curve of the temperature sensor.
Important: During the calibration process > OFF < needs to
be set.
>ON< The controller of the recirculating cooler uses the new
calibration curve.
In the ATC STATUS > ON1-point2-point < or >3-point < calibration can be carried out.
First geometrically define the location for calibration (measuring point
CT), then determine the temperature values of the calibration points.
The calibration type also determines the number of pairs of values
indicated on the VFD COMFORT-DISPLAY.
XXX.X
TTEMP 1
x 80.00
XXX.X
TTEMP 2
x120.00
XXX.X
TTEMP 3
x160.00
XXX.X
CTEMP 1
x 79.73
XXX.X
CTEMP 2
x119.51
XXX.X
CTEMP 3
x159.34
2 values per calibration point
TTEMP X: Temperature on circulator (actual value TT) 1 or 2 or
3
Defined temperature value of the calibration point.
This value is simultaneously stored with > CTEMP < and can
be indicated for control purposes.
CTEMP X: Calibration temperature (actual value CT) 1 or 2 or 3
The „Calibration value“ is determined with a temperature
measuring device and stored under menu item > CTEMP

Recirculating Cooler
Example:
1-point calibration
°C
T 1 T
Principle:
For ATC calibration, in steady state the bath temperature at the location
of the temperature sensor (CT) is determined at the respective adjusted
working temperature. This value is then set on the recirculating cooler in
the menu >ATCalibration< under menu item > CTEMP X MENU / CONTROL< is
displayed and press enter .
1.1. Under the menu >CONTROL< set the parameter to > INT < and
press enter (see page 30).
Continue: Press .
2. Press the start/stop key .
51

Menu functions
XXX.X
SETP 1
80.00
XXXXX
MENU
ADJUST
XXX.X
ACT SEN
INT
XXX.X
ATCSTAT
OFF
XXX.X
C ART
3 POINT
XXX.X
CTEMP 1
I 79.73
XXX.X
TTEMP 1
I 80.00
„I“ for internal
control
Setting working temperature SETP:
3. Press and set the first temperature value under
> SETPoint 1 < for example (example 1 st value = 80 °C).
3.1. Wait until this temperature is maintained constant in the bath for
about 5 minutes.
Calibration procedure:
4. Press the button until the menu item > MENU / ADJUST < is
displayed and press enter .
4.1. Set menu item >ATC SEN< to >INT< ,
4.2. Set menu item >ATCSTAT< to >OFFC ART< to >3 POINT CTEMP 1<
5.1. Set value: (79.73 °C)
Use the cursor keys to move left or right on the display
until the numeral you wish to change blinks.
Use the increase/decrease arrows to change the
selected numeral (-, 0, 1, 2, 3, ... 9).
5.2. Press enter and the recirculating cooler also stores the
value of TT as value for >TTMP 1< (80.00 °C) .
The first of the 3 points is now calibrated.
Continue: Press .
6. Repeat the calibration procedure for 120 °C and 160 °C.
(point 3. to 5.).
Examples:
TT = 80.00 °C TT = 120.00 °C TT = 160.00 °C
CT = 79.73 °C CT = 119.51 °C CT = 159.34 °C
52

Recirculating Cooler
7.8. MENU ANALOG – Analog inputs/outputs
REG+EPROG STAND-BY ALARM
XXXXX
MENU
ANALOG
In order to use the analog inputs and outputs, the recirculating cooler
must be equipped with the Analog Interface Modul available as option.
This submenu enables setting of the input and output values for the
programmer input and the temperature recorder outputs of socket
REG+E-PROG.
The >STAND-BY< input and the >ALARM< output are configurable.
ANALOG: Press enter to switch to menu level 2
F-ALARM
Function at alarm
A-ALARM
Type of alarm
EX-STBY
STAND-BY input
>F-ALARM< (STANDBY / ALARM / AL-STBY)
>A-ALARM< ( NORMAL / INVERS )
>EX-STBY < (INACTIV / ACTIV)
ACTINT [°C]
internal actual
temperature value
(bath temperature)
ACTEXT [°C]
external actual
temperature value
(external sensor)
S-POINT [°C]
active setpoint
temperature
POWER [%]
SETP [°C]
Setpoint
FLOWRAT [L/M]
ACTVAR [%]
Actuating variable
or
or
>CHANNEL < (1 / 2 / 3)
>CH1 < (ACTINT/ ACTEXT/ POWER/ S-POINT)
>CH1 0V< (-99.90 )
>CH1 10V< (300.00 )
>CH2 < (POWER/ S-POINT/ ACTINT/ ACTEXT)
>CH2 0V< (0.00 )
>CH2 10V< (100.00 )
>CH3 < (S-POINT/ ACTINT/ ACTEXT/ POWER)
>CH3 < (0-20MA / 4-20MA)
>CH3 0MA< (-99.90 )
>CH3 20MA< (300.00 )
>EPROG < (VOLTAGE (U) / CURRENT (I))
> EPROG U< (SETP / FLOWRAT / ACTVAR)
> UW °C< (-99.90 )
> OW °C< (300.00 )
53

Menu functions
or >EPROG < ( VOLTAGE (U) / CURRENT (I))
> EPROG I< (SETP / FLOWRAT / ACTVAR)
> UW °C< (-99.90 )
> OW °C< (300.00 )
1. Press the button until the desired submenu is displayed.
2. Set value/parameter:
Use the cursor keys to move left or right on the display until the
numeral you wish to change blinks.
Use the increase/decrease arrows to change the selected
numeral (-, 0, 1, 2, 3, ... 9).
or
select the parameter with the keys .
3. Press enter to store the value / parameter
Continue: Press / or
Alarm output
(for external alarm signal)
Possible parameters:
>F-ALARM< (STANDBY or ALARM or AL-STBY)
>A-ALARM< ( NORMAL or INVERS )
ALARM
XXXXX
F-ALARM
STANDBY
This socket is a potential-free change-over contact. With the adjustments
in the menu item > Funktion-ALARM < all operating conditions can be
signaled without having to change the pin assignments.
Signification of the terms under menu item >Function< :
The recirculating cooler is in condition
>STANDBY< or >ALARM<
-OFF-
S xx.xx
E -----
XXXXX
ALARM
CODE xx
or >AL-STBY< - both conditions are signaled.
54

XXXXX
A-ALARM
NORMAL
Type of alarm
Recirculating Cooler
For > A-ALARM / NORMAL < pins 2 and 3 are connected in any case
according to the selected > Function-ALARM A-ALARM / INVERS < pins 2 and 1 are connected in any case
according to the selected >FunctionEX-STBY <
INACTIV - standby input is ignored
ACTIV - standby input is active
Activate the standby input:
1. Under menu item > EXT-STBY ACTIV

Menu functions
CHANNEL 3
EPROG
CHANNEL 2
CHANNEL 1
1.
2.
3.
REG+E-PROG
XXXXX
CHANNEL
3 1
XXXXX
CH1
ACTINT
XXXXX
CH1 0V
10.00
XXXXX
CH1 10V
210.00
REG+E-PROG :
Outputs of the connector REG+E-PROG
1. Select CHANNEL 1, 2 or 3
2. First define the desired output value for CHANNELs 1 to 3:
ACTINT internal actual temperature value (bath temperature))
ACTEXT external actual temperature value (external sensor)
POWER periodic or intermittent heating or cooling
S-POINT active setpoint temperature
(SETPoint 1, 2, 3,/ integr. programmer /external programmer)
3. Then select the display size for CHANNELs 1 to 3:
Voltage outputs CHANNELs 1 and 2
Assign the voltage values of 0 V to the lowest and 10 V to the highest
necessary temperature (°C) or power rating (%) required as an output
value.
Current output CHANNEL 3
The current output (channel 3) offers 2 ranges for selection:
0 mA to 20 mA or
4 mA to 20 mA
Assign the current values 0 mA or 4 mA to the lowest and 20 mA to
the highest temperature (°C) or power rating (%) required as an
output value.
XXXXX
CH3
ACTINT
XXXXX
CH3
ACTINT
XXXXX
CH3
0-20MA
XXXXX
CH3
4-20MA
XXXXX
CH3 0MA
xx.xx
XXXXX
CH3 4MA
xx.xx
XXXXX
CH3 20A
xx.xx
or
XXXXX
CH3 20A
xx.xx (20A 20 MA)
0 V
10 °C 210 °C
Δ Τ = 200 K
197 °C 202 °C
Δ Τ = 5 K
0 mA 20 mA
4 mA
Example 1:
lowest temperature value: 10 °C
highest temperature value 210 °C
Fig. shows 200 °C scaled to paper width
rise: 50 mV/°C
Example 2:
lowest temperature value: 197 °C
highest temperature value: 202 °C
Fig. shows 5 °C scaled to paper width
rise: 2000 mV/°C
56

Recirculating Cooler
Fehler! Es ist nicht
möglich, durch die
Bearbeitung von
Feldfunktionen Objekte
zu erstellen. 1. Fehler!
Es ist nicht möglich,
durch die Bearbeitung
von Feldfunktionen
Objekte zu erstellen.
2. Fehler! Es ist
nicht möglich, durch die
Bearbeitung von
Feldfunktionen Objekte
zu erstellen.
-OFF-
S XX.XX
F X.XL
>FLOWRAT<
Indication on display
XXXXX
MENU
ANALOG
Example:
2.
3.
4.
5.
XXXXX
EPROG
VOLTAGE
XXXXX
EPROG U
SETP
XXXXX
UW °C
20.00
XXXXX
OW °C
300.00
E-PROG - input
Setting needs to be carried out, if
1. setpoint programming is to be made via an external voltage or
current source or programmer. For this, in the menu > MENU /
CONFIG < first set the menu item > SETP < to >EPROG MENU / CONFIG < set the menu item
>ACTVAR< to >EPROG SETP <
or under menu item > ACTVAR SETP < or > ACTVAR MENU / CONFIG MENU / ANALOG

Menu functions
XXXXX
SP 50.00
I xx.xx
Example: SP 50.00 °C
SP = Setpoint Programmer
Example:
• Set the external voltage or current source output for the equivalent of
50 °C temperature setpoint.
• Press .
The temperature value adjusted and set on the external voltage or
current source is displayed in line 2 of the VFD COMFORT-DISPLAY
for control purposes.
This EPROG input enables the use of different voltage and
current values as program parameters.
°C
UW – Setting the LOW value:: (See below )
300
250
200
150
B
A
1. Adjust and set the lowest desired value on the voltage or
current source resp. (Example A: 1 V).
Wait appr. 30 seconds.
2. Assign a lower temperature threshold value to this adjusted
voltage/current value by pressing the appropriate buttons on
the keypad of the instrument (Example A: 20 °C ) and set by
100
80
60
40
20
1 2 3 4 5 6 7 8 9 10 V
2 4 6 8 10 14 18 20 mA
pressing enter .
OW – Setting the HIGH value: (See below )
1. Adjust and set the highest desired value on the voltage or
current source resp. (Example A: 10 V).
Wait appr. 30 seconds.
2. Assign an upper temperature threshold value to this
adjusted voltage/current value by pressing the appropriate
buttons on the keypad of the instrument (Example A: 200
°C) and set by pressing enter .
XXXXX
UW °C
20.00
XXXXX
OW °C
200.00
Example B in the diagram serves to illustrate that the end
point values are freely selectable (Ex: 8 mA and 16 mA)..
Example out of diagram A:
XXXXX
SP152.00
I xx.xx
• Adjusting the voltage source for an output of 7.6 V!
The instrument calculates this value from the rise angle of the two
predecided end points (in example A: 7.6 V correspond to an external
setpoint temperature of 152.0 °C ).
After returning the VFD display to standard display by pressing ,
this value is displayed in line 2 (Example: SP 152.00 °C).
Notice:
If this adjustment is not correctly performed at two different points, the setpoint setting
will be incorrect.
Important:
The usable temperature range between > UW < and > OW < is limited to the
configured working temperature range of the circulator resp. of the unit combination
(working temperature range see technical specifications on page 10)
58

Recirculating Cooler
8. Troubleshooting guide / Error messages
XXXXX
ALARM
CODE 01
+
XXXXX
WARNING
CODE 40
Alarm with a complete shutdown of the unit
Whenever the microprocessor electronics registers a failure, a complete
shutdown of the heater and circulating pump is performed. The alarm light
„ “ illuminates and a continuous signal tone sounds.
The VFD COMFORT-DISPLAY indicates the cause for the alarm in form of a
code.
Warning without a complete shutdown of the unit
The VFD COMFORT-DISPLAY indicates the cause for the warning in form of
a code and an acoustic signal sounds in regular intervals.
These messages appear every 10 seconds.
Press enter
to quit the audible signal.
ALARM
CODE 01
WARNING
CODE 03
ALARM
CODE 03
WARNING
CODE 04
ALARM
CODE 04
ALARM
CODE 05
ALARM
CODE 06
ALARM
CODE 07
• The recirculating cooler is operated without bath fluid, or the liquid level is
insufficient. Replenish the bath tank with the bath fluid.
• Tube breakage has occured (insufficient filling level due to excessive bath
fluid pumped out). Replace the tubing and replenish the bath tank with the
bath fluid.
• The float is defect (e. g., because damaged in transit). Repair by
authorized JULABO service personnel.
• Excess temperature sensors defect.
• The excess temperature value lies below the working temperature
setpoint. Set the excess temperature to a higher value.
• Excess temperature warning
or
Excess temperature alarm
Warning type: Set to>Warning< or >Alarm< (see page 27)
• Low temperature warning
or
Low temperature alarm.
Warning type: Set to>Warning< or >Alarm< (see page 27)
• Cable of the working temperature sensor interrupted or short-circuited.
• Defect of the working or excess temperature sensor.
Working temperature and excess temperature sensors report a
temperature difference of more than 25 °C.
• Other errors (I 2 C-BUS errors)
59

Troubleshooting guide / Error messages
ALARM
CODE 12
ALARM
CODE 14
ALARM
CODE 15
• Error in A/D converter
• Excess temperature sensors defect.
• The excess temperature value lies below the working temperature
setpoint. Set the excess temperature to a higher value.
• External control selected, but external Pt100 sensor not connected or
defect.
ALARM
CODE 33
ALARM
CODE 38
WARNING
CODE 40
• Cable of the excess temperature sensor interrupted or short-circuited.
• Ext. Pt100 sensor input without signal, but setpoint programming set to
external Pt100.
• The early warning system for low level signals a critical fluid level.
Replenish the bath tank with the bath fluid.
After eliminating the malfunction, press the mains power switch off and on
again to cancel the alarm state.
If the unit cannot be returned to operation, contact an authorized JULABO
service station.
Mains fuses
The mains fuses on the rear of the unit are safety cutouts – 16A.
60

Recirculating Cooler
9. Safety recommendations
Follow the safety recommendations to prevent damage to persons or property.
Further, the valid safety instructions for working places must be followed.
• Only connect the unit to a power socket with earthing contact (PE – protective
earth)!
• Place the instrument on an even surface on a pad made of non-inflammable
material.
• Do not stay in the area below the unit.
• Make sure you read and understand all instructions and safety precautions listed
in this manual before installing or operating your unit.
• Observe the fire point of the bath medium used.
The excess temperature protection should be set at least 25 °C below the fire
point.
• Never operate the unit without bath fluid in the bath.
• Pay attention to the thermal expansion of bath oil during heating to avoid
overflowing of the fluid.
• Prevent water from penetrating into the hot bath oil.
• Exercise caution when emptying hot bath fluids!
Check the temperature of the bath fluid prior to draining (by switching the unit on
for a short moment for example).
• Observe the limited working temperature range when using plastic bath tanks.
• Employ suitable connecting tubing.
Make sure that the tubes are securely attached.
• Never operate damaged or leaking equipment.
• Always turn off the unit and disconnect the mains cable from the power source
before performing any service or maintenance procedures, or before moving the
unit.
• Always empty the bath before moving the unit.
• Never operate equipment with damaged mains power cables.
• Some parts of the bath cover and the pump connections may become extremely
warm during continuous operation. Therefore, exercise particular caution when
touching these parts.
Notice:
Check the safety installations at least twice a year!
• Excess temperature protection according to IEC 61010-2-010
With a screwdriver turn back the adjustable excess temperature protection until
the shutdown point (actual temperature).
• Low level protection according to IEC 61010-2-010
To check the function of the float, it can be manually lowered with a screwdriver
for example.
61

Electrical connections
10. Electrical connections
Notice:
Use shielded cables only.
The shield of the connecting cable is electrically connected to the plug housing.
The unit ensures safe operation if connecting cables with a maximum length of 3 m are
used. The use of longer cables does not affect proper performance of the unit, however
external interferences may have a negative impact on safe operation.
Pt100
Shield
SERIAL
ext. Pt100
2
3
Plug
1
4
Look on
soldering side.
Socket for external Pt100 sensor
Pin assignment:
Pin Signal
1 I+
2 U+
3 U-
4 I-
The shield of the connecting cable is electrically connected to the plug
housing and the sensor tube.
RS232 serial interface
This port can be used to connect a computer with an RS232 cable for
remote control of the circulator.
Pin assignments RS232:
Pin 2 RxD Receive Data
Pin 3 TxD Transmit Data
Pin 4 DTR Data terminal ready
Pin 5 0 V Signal GND
Pin 7 RTS Request to send
Pin 8 CTS Clear to send
Pin 1; 6; 9
Reserved - do not use!
Interface correspondence: RS232:
Circulator (9-pole)
PC (9-pole)
Pin 2 RxD ⇔ Pin 3 TxD
Pin 3 TxD ⇔ Pin 2 RxD
Pin 4 DTR ⇔ Pin 6 DSR
Pin 5 GND ⇔ Pin 5 GND
Pin 7 RTS ⇔ Pin 8 CTS
Pin 8 CTS ⇔ Pin 7 RTS
RS232 interface cable 9-pin / 9-pin, 2.5 m - Order No.: 8 980 073
62

Recirculating Cooler
Alarm output
(for external alarm signal)
This potential-free change-over contact is activated in case of an alarm
when pins 2 and 3 are connected.
ALARM
Switching capacity max. 30 W / 40 VA
Switching voltage max. 125 V∼/−
Switching current max. 1 A
Functional description see page 54
STAND-BY input
(for external emergency switch-off)
Pin assignment: Pin Signal
1 not connected
2 5 V / DC
3 0 V
Functional description see page 55
STAND-BY
REG+E-PROG
Programmer input / temperature recorder output
Pin
Signal
1 Voltage output Channel 1 0 ... 10 V
2 Voltage output Channel 2 0 ... 10 V
3 GND for outputs 0 V
4 Programmer input EPROG 0 to 10 V / 0 to 20 mA
5 Current output Channel 3 0 to 20 mA / 4 to 20 mA
6 GND for Progammer 0 V
Functional description see page 56
Control connector
Return flow safety device.
If the liquid levels in the recirculating cooler and the external system are at
different heights, overflowing must be prevented after the power has been turned
off. For this reason, solenoid valves for loop circuit can be integrated in
the loop circuit.
The control output is not powered in the OFF condition.
Output voltage: 230 V∼ / max. 0.1 A
63

Remote control
11. Remote control
11.1. Setup for remote control
SERIAL
1. Check the interface parameters for both interfaces (on recirculating
cooler and PC) and make sure they match.
(Serial interface see page 42)
2. In the menu > MENU / CONFIG < set the menu item > SETPoint < to
> SERIAL < .
(see 7.3.1. SETPOINT – Keypad control or remote control on page 37)
3. Connect both units with an interface cable..
Like all parameters which can be entered through the keypad, interface
parameters are stored in memory even after the recirculating cooler is turned
off.
11.2. Communication with a PC or a superordinated data system
If the recirculating cooler is put into remote control mode via the configuration
level, the VFD COMFORT-DISPLAY will read „R -OFF-„ = REMOTE STOP.
The recirculating cooler is now operated via the computer.
In general, the computer (master) sends commands to the recirculating
cooler (slave). The recirculating cooler sends data (including error
messages) only when the computer sends a query.
In remote control mode: After a power interruption the order to start and all
values which have to be adjusted must be resent from the personal computer
via the interface.
AUTOSTART is not possible.
A transfer sequence consists of:
• command
• space (⇔; Hex: 20)
• parameter (the character separating decimals in a group is the period)
• end of file (↵; Hex: 0D)
• The response (data string) after an in command is always followed by a
line feed (LF, Hex: 0A).
The commands are divided into in or out commands.
in commands: asking for parameters to be displayed
out commands: setting parameters
64

Recirculating Cooler
Important times for a command transmission:
To ensure a safe data transfer, the time gap between two commands should
be at least 250 ms.
The circulator automatically responds to an in command with a data string
followed by a LF (Line Feed). The next command should only be sent after
10 ms.
The out commands are valid only in remote control mode.
Examples:
Command to set the working temperature >Setpoint1< to 55.5 °C
out_sp_00 ⇔ 55.5↵
Command to ask for the working temperature >Setpoint1<
in_sp_00↵
Response from the circulator:
55.5↵ LF
11.3. List of commands
out commands: Setting temperature values or parameters.
Command Parameter Response of recirculating cooler
out_mode_01 0 Use working temperature > SETP 1<
out_mode_01 1 Use working temperature > SETP 2<
out_mode_01 2 Use working temperature > SETP 3<
out_mode_02 0 Selftuning „OFF“.
Temperature control by using the stored parameters.
out_mode_02 1 Selftuning „ONCE“
Single selftuning of controlled system after the next start.
out_mode_02 2 Selftuning „ALWAYS“
Continual selftuning of controlled system whenever a new
setpoint is to be reached.
out_mode_03 0 Set external programmer input to voltage.
Voltage 0 V ... 10 V
out_mode_03 1 Set external programmer input to current.
Current 0 mA ... 20 mA
out_mode_04 0 Temperature control of internal bath.
out_mode_04 1 External control with Pt100 sensor.
out_mode_05 0 Stop the unit = R –OFF-.
65

Remote control
Command Parameter Response of recirculating cooler
out_mode_05 1 Start the unit.
out_mode_08 0 Set the control dynamics - aperiodic
out_mode_08 1 Set the control dynamics - standard
out_sp_00 xxx.xx Set working temperature. „SETP 1“
out_sp_01 xxx.xx Set working temperature. „SETP 2“
out_sp_02 xxx.xx Set working temperature. „SETP 3“
out_sp_03 xxx.xx Set high temperature warning limit „OVERTEMP“
out_sp_04 xxx.xx Set low temperature warning limit „SUBTEMP“
out_sp_06 xxx.xx Set manipulated variable for the heater via serial interface
-99.99 ... +100 [%]
out_sp_07 x Set the pump pressure stage. (1 ... 4)
out_par_04 x.x CoSpeed 0 ... 5.0 Band limit during external control.
Setting the maximum difference between the temperatures
in the internal bath and external system.
out_par_06 xxx Xp control parameter of the internal controller. 0.1 ... 99.9
out_par_07 xxx Tn control parameter of the internal controller. 0 ... 9999
out_par_08 xxx Tv control parameter of the internal controller. 0 ... 999
out_par_09 xxx Xp control parameter of the cascade controller. 0.1 ... 99.9
out_par_10 xxx Proportional portion of the cascade controller. 1 ... 99.9
out_par_11 xxx Tn control parameter of the cascade controller. 0 ... 9999
out_par_12 xxx Tv control parameter of the cascade controller. 0 ... 999
out_par_13 xxx Maximum internal temperature of the cascade controller.
out_par_14 xxx Minimum internal temperature of the cascade controller.
out_par_15 xxx Band limit (upper) 0 ... 200 °C
out_par_16 xxx Band limit (lower) 0 ... 200 °C
66

Recirculating Cooler
in commands: Asking for parameters or temperature values to be displayed.
Command Parameter Response of recirculating cooler
version none Number of software version (V X.xx)
status none Status message, error message (see page 69)
in_pv_00 none Actual bath temperature.
in_pv_01 none Heating power being used (%).
in_pv_02 none Temperature value registered by the external Pt100 sensor.
in_pv_03 none Temperature value registered by the safety sensor.
in_pv_04 none Setpoint temperature of the excess temperature protection
in_sp_00 none Working temperature „SETP 1“
in_sp_01 none Working temperature „SETP 2“
in_sp_02 none Working temperature „SETP 3“
in_sp_03 none High temperature warning limit „OVERTEMP“
in_sp_04 none Low temperature warning limit „SUBTEMP“
in_sp_05 none Setpoint temperature of the external programmer
(REG+E-PROG) .
in_sp_07 none Adjusted pump stage
in_sp_08 none Value of a flowrate sensor connected to the E-Prog input
in_par_00 none Temperature difference between working sensor and safety
sensor
in_par_01 none Te - Time constant of the external bath.
in_par_02 none Si - Internal slope
in_par_03 none Ti - Time constant of the internal bath.
in_par_04 none CoSpeed - Band limit (max. difference between the
temperatures in the internal bath and external system).
in_par_05 none Factor pk/ph0:
Ratio of max. cooling capacity versus max. heating capacity
in_par_06 none Xp control parameter of the internal controller.
in_par_07 none Tn control parameter of the internal controller.
in_par_08 none Tv control parameter of the internal controller.
in_par_09 none Xp control parameter of the cascade controller.
in_par_10 none Proportional portion of the cascade controller.
67

Remote control
Command Parameter Response of recirculating cooler
in_par_11 none Tn control parameter of the cascade controller.
in_par_12 none Tv control parameter of the cascade controller.
in_par_13 none Adjusted maximum internal temperature of the cascade
controller.
in_par_14 none Adjusted minimum internal temperature of the cascade
controller.
in_par_15 none Band limit (upper)
in_par_16 none Band limit (lower)
in_mode_01 none Selected setpoint:
0 = SETP 1
1 = SETP 2
2 = SETP 3
3 = Last setpoint setting was carried out
through an external programmer
in_mode_02 none Selftuning type:
0 = Selftuning „OFF“
1 = Selftuning „ONCE“
2 = Selftuning „ALWAYS“
in_mode_03 none Type of the external programmer input:
0 = Voltage 0 V to 10 V
1 = Current 0 mA to 20 mA
in_mode_04 none Internal/external temperature control:
0 = Temperature control with internal sensor.
1 = Temperature control with external Pt100 sensor.
in_mode_05 none Recirculating cooler in Stop/Start condition:
0 = Stop
1 = Start
in_mode_08 none Adjusted control dynamics
0 = aperiodic
1 = standard
in_hil_00 none Max. cooling power (%).
in_hil_01 none Max. heating power (%).
68

Recirculating Cooler
11.4. Status messages
Status messages
Description
00 MANUAL STOP Recirculating cooler in „OFF“ state.
01 MANUAL START Recirculating cooler in keypad control mode.
02 REMOTE STOP Recirculating cooler in „r OFF“ state.
03 REMOTE START Recirculating cooler in remote control mode.
11.5. Error messages
Error messages
Description
-01 LOW LEVEL ALARM Low liquid level alarm or
Excess temperature protector alarm
-03 EXCESS TEMPERATURE
High temperature warning.
WARNING
-04 LOW TEMPERATURE WARNING Low temperature warning.
-05 WORKING SENSOR ALARM Working temperature sensor short-circuited or interrupted.
-06 SENSOR DIFFERENCE ALARM Sensor difference alarm.
Working temperature and safety sensors report a
temperature difference of more than 25 °C.
-07 I 2 C-BUS ERROR Internal error when reading or writing the I 2 C bus.
-08 INVALID COMMAND Invalid command.
-09 COMMAND NOT ALLOWED IN Invalid command in current operating mode.
CURRENT OPERATING MODE
-10 VALUE TOO SMALL Entered value too small.
-11 VALUE TOO LARGE Entered value too large.
-12 TEMPERATURE MEASUREMENT Error in A/D converter.
ALARM
-13 WARNING : VALUE EXCEEDS
TEMPERATURE LIMITS
-14 EXCESS TEMPERATURE
PROTECTOR ALARM
Value lies outside the adjusted range for the high and low
temperature warning limits. But value is stored.
Excess temperature protector alarm
-15 EXTERNAL SENSOR ALARM External control selected, but external Pt100 sensor not
connected.
-33 SAFETY SENSOR ALARM Excess temperature sensor short-circuited or interrupted.
-38 EXTERNAL SENSOR SETPOINT
PROGRAMMING ALARM
Ext. Pt100 sensor input without signal and setpoint
programming set to external Pt100.
-40 NIVEAU LEVEL WARNUNG Low liquid level warning in the internal reservoir.
69

JULABO Service – Online remote diagnosis
12. JULABO Service – Online remote diagnosis
JULABO recirculating coolers are equipped with a so-called black
box. This box is implemented in the controller and records all
significant data for the last 30 minutes.
In case of a failure, this data can be read out from the unit by
using special software. The respective program is available for
free download from www.julabo.de \ EasyBlackBox.
• Installation is easy and carried out step by step.
Please observe the instructions.
• Data read-out is possible in the conditions
„OFF“, „R OFF“ or „ALARM“.
• Connect the recirculating cooler to the computer using an
interface cable.
• Start the EasyBlackBox program.
The program asks for the used port (COM1, ......) and the
baud rate of the unit.
You do not have this information on hand? Simply try it out!
The program keeps on sending this request until the actually
used port and correct baud rate are entered.
• Data is read out and shown on the monitor
divided in the sections
>Einstellungen/SettingsAlarmspeicher/Alarms storedBlackbox<
see example
• After pressing >Speichern/Save< a text file is
compiled. The program proposes a filename -
>C:\model description and barcode no.

Recirculating Cooler
13. Maintaining the cooling performance
Air cooled recirculating coolers:
To maintain the full cooling performance, clean the
condenser from time to time.
• Switch off the unit, disconnect mains power cable.
• Remove the venting grid.
• Clean the ribbed condenser with a vacuum cleaner.
• Replace the venting grid.
• Switch on the unit.
14. Cleaning / repairing the unit
Caution:
Always turn off the unit and disconnect the mains cable from the power source before
cleaning the unit.
Prevent humidity from entering into the recirculating cooler..
Electrical connections and any other work must be performed by qualified personnel
only.
Cleaning:
For cleaning the bath tank and the immersed parts of the recirculating cooler, use low
surface tension water (e.g., soap suds).
Clean the outside of the unit using a wet cloth and low surface tension water.
The recirculating cooler is designed for continuous operation under normal conditions.
Periodic maintenance is not required.
The tank should be filled only with a bath fluid recommended by JULABO. To avoid
contamination, it is essential to change the bath fluid from time to time.
Repairs
Before asking for a service technician or returning a JULABO instrument for
repair, please contact an authorized JULABO service station.
When returning the unit:
• Clean the unit in order to avoid any harm to the service personnel.
• Attach a short fault description.
If you intend to return your JULABO unit to us, you will find a Service Return Form
on our website www.julabo.de. Please use this as a delivery note and include it to
the unit or send it in advance either by Fax or E-Mail.
• During transport the unit has to stand upright. Mark the packing correspondingly.
• When returning a unit, take care of careful and adequate packing.
• JULABO is not responsible for damages that might occur from insufficient packing.
JULABO reserves the right to carry out technical modifications with repairs for
providing improved performance of a unit.
71