Julabo F12-MC, F25-MC, F26-MC, F32-MC, F33-MC Operating Manual

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19530350.doc Druck: 02.02.05

English

Operating

manual

Refrigerated and Heating Circulators

F12-MC F25-MC F26-MC
F32-MC F33-MC F34-MC
FS18-MC FP40-MC FP50-MC

FPW50-MC

JULABO USA, Inc.
754 Roble Road, Suite 180
Allentown, PA 18109

( [phone]
3 [phone]

š info @ julabo.com
ü www.julabo.com

1.953.0350BU3 02/05

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2

Contents
Operating manual Pages 2 to 15
Operating instructions Pages 16 to 54

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 circulators. For optimum utilization of all
functions, we recommend that you thoroughly study this manual prior to beginning
operation.

Quality Management System

ISO 9001

2000

W

e

a

r

e

c

e

r

t

i

f

i

e

d

The JULABO Quality M anagement 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. QA 051004008.

Unpacking and checking

Unpack the circulator 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.

Printed in Germany
Changes without prior notification reserved

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TABLE OF CONTENTS

Operating manual...........................................................................................................5

Description.................................................................................................................5

Operator responsibility – Safety recommendations..................................................... 6

Warranty conditions ...................................................................................................9

Technical specifications ............................................................................................10

Operating instructions...................................................................................................16

1. Operating controls and functional elements .......................................................... 16

2. Safety notes for the user........................................................................................ 18

3. Preparations..........................................................................................................18

3.1. Installation........................................................................................................18

3.2. Bath fluids ........................................................................................................ 19

3.3. Tubing..............................................................................................................21

3.4. Filling / draining...............................................................................................22

3.5. Temperature application to external systems.....................................................23

4. Operating procedures............................................................................................24

4.1. Power connection..............................................................................................24

4.2. Switching on / Start - Stop................................................................................24

5. Setting the temperatures...............................................................................27

5.1. 1-setpoint mode ................................................................................................ 27

5.2. 3-setpoint mode ................................................................................................ 27

6. Safety installations, warning functions.........................................................29

6.1. Excess temperature protection .......................................................................... 29

6.1.1. Early warning system, low level protection...............................................30

6.2. High and low temperature warning functions....................................................31

6.3. Limitation of the operating temperature range ..................................................32

6.4. Change-over of the warning function to shutdown function..............................33

7. Menu functions............................................................................................34

7.1. Setting the pump pressure.................................................................................35

7.2. ATC Absolute Temperature Calibration, 3-point calibration.............................36

7.3. Change-over of the key mode................................................................... 39

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7.4. Remote control: activate – deactivate ...............................................................39

7.5. Interface - Baud rate, Handshake, Parity...........................................................40

7.6. Control parameters – Xp, Tv, Tn......................................................................41

7.7. Reset.................................................................................................................42

8. Troubleshooting guide / Error messages...............................................................43

9. Safety recommendations .......................................................................................46

10. Electrical connections...........................................................................................47

11. Remote control.....................................................................................................48

11.1. Setup for remote control...............................................................................48

11.2. Communication with a PC or a superordinated data system..........................48

11.3. List of commands.........................................................................................49

11.4. Status messages............................................................................................51

11.5. Error messages .............................................................................................51

12. Maintaining the cooling performance...................................................................52

13. JULABO Service – Online remote diagnosis ........................................................53

14. Cleaning the unit ..................................................................................................54

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5

Operating manual

Description

JULABO circulators 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).

PID2

ATC

3

RS232

IEC

EN
DIN

þ The circulators 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 MULTI-DISPLAY (LED).
Three menu keys facilitate adjusting setpoints, warning and safety
functions and menu functions.

þ The PID temperature control adapts the heat supplied to the thermal

requirements of the bath.

þ 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.

þ Electrical connections:

The serial interface RS232 allows modern process technology without
additional interface.
Alarm output for external alarm message or control of JULABO
refrigerating baths or solenoid valve (cooling water).

þ 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 MULTI-DISPLAY (LED).

þ The early warning system for low level signals that bath fluid needs to

be refilled before the low level protection conforming to IEC 61010-2­010 causes a complete shut-down of the main functional elements.

þ Pump Pressure Control. The pump capacity (electronically adjustable

via the motor speed) enables to adapt to varying conditions for internal
and external temperature applications.

þ The circulator conforms to the relevant requirements specified by

European guidelines.

JULABO circulators 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).

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Operating manual

6

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 circulator
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 circulator may only be operated by persons that
are absolutely familiar with these materials and the circulator. 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 USA, Inc.

754 Roble Road, Suite 180
Allentown, PA 18109

( [phone]
3 [phone]

š info @ julabo.com
ü www.julabo.com

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.

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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,
maintainance and repairs of the circulator.
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.

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 materials.

When using hazardous materials, the user must attach the enclosed safety labels to the
front of the unit so they are well visible: The yellow warning label W09 (danger area)
and the blue mandatory label M018 or Semi S1-0701 Table A1-2 #9 (Carefully read the
user information prior to beginning operation).

Warning label W09:
Colours:

yellow, black

Danger area.
Attention! Observe instructions.
(operating manual, safety data sheet)

Mandatory label
M018

Colours: blue, white

Carefully read the user information prior to
beginning operation

Scope: EU

Semi S1-0701
Table A1-2 #9

Carefully read the user information prior to
beginning operation

Scope: NAFTA

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Operating manual

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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 circulator, particularly the respective safety recommendations. Also
observe the pin assignment of plugs and technical specifications of the products.

Disposal:

The circulator 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 R134a or R404A or R507– 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.

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Warranty conditions

JULABO USA, Inc. 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 no less than

TWO (2) YEARS

or a maximum of ten thousand hours (10,000), whichever comes first, from the date of
delivery of the products. To avoid forfeiture of the warranty and to allow JULABO to be
of continuing service to the scientific community, the record of the purchase is required
to be returned to JULABO or one of its authorized representatives within 30 days of
receipt of equipment.
JULABO’s sole obligation shall be to repair or to replace at JULABO’s option, F.O.B.
its plant or locally, without charge, any part(s) that prove defective within the warranty
period, providing the customer notifies JULABO promptly and in writing of any such
defect. Compensation for labor other than Julabo’s employees will not be JULABO’s
obligation. Part(s) replacement does not constitute an extension of the original warranty
period.
JULABO will not assume responsibility for unauthorized product modifications, or for
repairs, replacements, or modifications negligently or otherwise improperly made or
performed by persons other than JULABO employees or authorized representatives.
JULABO MAKES NO WARRANTY OR MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE, OR ANY OTHER WARRANTY, EXPRESS OR IMPLIED,
AS TO THE DESIGN, SALE, INSTALLATION, OR USE OF ITS PRODUCTS, AND
SHALL NOT BE LIABLE FOR CONSEQUENTIAL DAMAGES RESULTING FROM
THE USE OF ITS PRODUCTS.
While JULABO’s personnel or that of its authorized representatives are available to
advise customers concerning general applications of all manufactured products, oral
representations are not warranties with respect to particular applications, and should not
be relied upon if inconsistent with product specifications or the terms stated herein.
All glassware, such as reference thermometers, etc, are expressly excluded from this
warranty declaration.
In any event, the terms and conditions contained in JULABO’s formal sales contracts
shall be controlling and any change must be in writing and signed by an authorized
executive of JULABO USA, Inc.

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Operating manual

10

Technical specifications

F12-MC F25-MC

Working temperature range °C -20 ... 200 -28 ... 200
Temperature stability °C ±0,01
Temperature selection digital

via key pad indication on MULTI-DISPLAY (LED)

remote control via personal computerindication on monitor
Temperature indication MULTI-DISPLAY (LED)
Resolution °C 0.1
Absolute Temperature Calibration °C ±3
Temperature control PID
Heater wattage (at 230 V) kW 2,0 2,0
Heater wattage (at 115V) kW 1.0 1.0
Cooling capacity °C +20 0 -10 +20 0 -20
Medium ethanol W 150 100 60 260 200 60
Refrigerant R134a R134a
Electronically adj. pump capacity stages 1 ... 4
Flow rate l/min at 0 bar 11 ... 16
Pressure max. bar at 0 liter 0.22 ... 0.45
Electrical connections:

External alarm device 24-0 V DC / max. 25 mA

Computer interface RS232
Overall dimensions (WxDxH) cm 20x36x56 23x42x61
Bath opening (WxL) cm 15x16 12x14
Bath depth cm 13 14
Filling volume liters 3 ... 4,5 3 ... 4,5
Weight kg 23 31
Ambient temperature °C 5 ... 40 5 ... 40
Mains power connection 230 V/50 Hz V/ Hz 207-253 / 50 207-253 / 50
Current input (at 230 V) A 11 12

Mains power connection 230 V/60 Hz V/ Hz 207-253 / 60 207-253 / 60
Current input (at 230 V) A 11 12

Mains power connection 115 V/60 Hz V/ Hz 103-127 / 60 103-127 / 60
Current input (at 115 V) A 12 13

Mains power connection 100 V/60 Hz V/ Hz ------- 90-115 / 50-60
Current input (at 100 V) A ------- 13

All measurements have been carried out at: rated voltage and frequency
ambient temperature: 20 °C Technical changes without prior notification reserved.

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F26-MC F32-MC

Working temperature range °C -28 ... 200 -35 ... 200
Temperature stability °C ±0,01 ±0,01
Temperature selection digital

via keypad indication on MULTI-DISPLAY (LED)

remote control via personal computer indication on monitor
Temperature indication MULTI-DISPLAY (LED)
Resolution °C 0.1
Absolute Temperature Calibration °C ±3
Temperature control PID
Heater wattage (at 230 V) kW 2,0 2,0
Heater wattage (at 115V) kW 1.0 1.0
Cooling capacity °C +20 0 -20 +20 0 -20 -30
Medium ethanol W 260 200 60 450 390 150 50
Refrigerant R134a R134a
Electronically adj. pump capacity stages 1 ... 4
Flow rate l/min at 0 bar 11 ... 16
Pressure max. bar at 0 liter 0.22 ... 0.45
Electrical connections:

External alarm device 24-0 V DC / max. 25 mA

Computer interface RS232
Overall dimensions (WxDxH) cm 42x42x42 31x42x64
Bath opening (WxL) cm 12x14 18x12
Bath depth cm 14 15
Filling volume liters 3 ... 4,5 5,5 ... 8
Weight kg 31 37
Ambient temperature °C 5 ... 40 5 ... 40
Mains power connection 230 V/50 Hz V/ Hz 207-253 / 50 207-253 / 50
Current input (at 230 V) A 12 13

Mains power connection 230 V/60 Hz V/ Hz ------- ------­Current input (at 230 V) A ------- -------

Mains power connection 115 V/60 Hz V/ Hz ------- 103-127 / 60
Current input (at 115 V) A ------- 14

Mains power connection 100 V/60 Hz V/ Hz ------- 90-115 / 50-60
Current input (at 100 V) A ------- 14

All measurements have been carried out at: rated voltage and frequency
ambient temperature: 20 °C Technical changes without prior notification reserved.

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Operating manual

12

F33-MC F34-MC

Working temperature range °C -30 ... 200 -30 ... 150
Temperature stability °C ±0,01 ±0,01
Temperature selection digital

via keypad indication on MULTI-DISPLAY (LED)

remote control via personal computer indication on monitor
Temperature indication MULTI-DISPLAY (LED)
Resolution °C 0.1
Absolute Temperature Calibration °C ±3
Temperature control PID
Heater wattage (at 230 V) kW 2,0 2,0
Heater wattage (at 115V) kW 1.0 1.0
Cooling capacity °C +20 0 -20 -30 +20 0 -20 -30
Medium ethanol W 500 320 120 30 450 320 140 30
Refrigerant R134a R134a
Electronically adj. pump capacity stages 1 ... 4
Flow rate l/min at 0 bar 11 ... 16
Pressure max. bar at 0 liter 0.22 ... 0.45
Electrical connections:

External alarm device 24-0 V DC / max. 25 mA

Computer interface RS232
Overall dimensions (WxDxH) cm 36x46x69 38x58x62
Bath opening (WxL) cm 23x14 24x30
Bath depth cm 20 15
Filling volume liters 12 ... 16 14 ... 20
Weight kg 44 42
Ambient temperature °C 5 ... 40 5 ... 40
Mains power connection 230 V/50 Hz V/ Hz 207-253 / 50 207-253 / 50
Current input (at 230 V) A 12 12

Mains power connection 230 V/60 Hz V/ Hz 207-253 / 60 ------­Current input (at 230 V) A 12 -------

Mains power connection 115 V/60 Hz V/ Hz 103-127 / 60 103-127 / 60
Current input (at 115 V) A 14 14

Mains power connection 100 V/60 Hz V/ Hz
Current input (at 100 V) A

All measurements have been carried out at: rated voltage and frequency
ambient temperature: 20 °C Technical changes without prior notification reserved.

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13

FS18-MC

Working temperature range °C -35 ... 150
Temperature stability °C ±0,01
Temperature selection digital

via keypad indication on MULTI-DISPLAY (LED)

remote control via personal computer indication on monitor
Temperature indication MULTI-DISPLAY (LED)
Resolution °C 0.1
Absolute Temperature Calibration °C ±3
Temperature control PID
Heater wattage (at 230 V) kW 2,0
Heater wattage (at 115V) kW 1.0
Cooling capacity °C +20 0 -20 -30
Medium ethanol W 460 340 150 50
Refrigerant R134a
Electronically adj. pump capacity stages 1 ... 4
Flow rate l/min at 0 bar 11 ... 16
Pressure max. bar at 0 liter 0.22 ... 0.45
Electrical connections:

External alarm device 24-0 V DC / max. 25 mA

Computer interface RS232
Overall dimensions (WxDxH) cm 31x42x64
Bath opening (WxL) cm -­Bath depth cm -­Filling volume liters 1,7 ... 3
Weight kg 37
Ambient temperature °C 5 ... 40
Mains power connection 230 V/50 Hz V/ Hz 207-253 / 50
Current input (at 230 V) A 12

Mains power connection 230 V/60 Hz V/ Hz ------­Current input (at 230 V) A -------

Mains power connection 115 V/60 Hz V/ Hz 103-127 / 60
Current input (at 115 V) A 14

Mains power connection 100 V/60 Hz V/ Hz ------­Current input (at 100 V) A -------

All measurements have been carried out at: rated voltage and frequency
ambient temperature: 20 °C Technical changes without prior notification reserved.

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Operating manual

14

FP40-MC FP(W)50-MC

Working temperature range °C -40 ... 200 -50 ... 200
Temperature stability °C ±0,02 ±0,02
Temperature selection digital

via keypad indication on MULTI-DISPLAY (LED)

remote control via personal computer indication on monitor
Temperature indication MULTI-DISPLAY (LED)
Resolution °C 0.1
Absolute Temperature Calibration °C ±3
Temperature control PID
Heater wattage (at 230 V) kW 2,0 2,0

Cooling capacity °C +20 0 -20 -40 +20 0 -20 -40
Medium ethanol W 680 500 320 40 900 800 500 160
Refrigerant R404A R404A / R507
Electronically adj. pump capacity stages 1 ... 4
Flow rate l/min at 0 bar 11 ... 16
Pressure max. bar at 0 liter 0.22 ... 0.45
Electrical connections:

External alarm device 24-0 V DC / max. 25 mA

Computer interface RS232
Overall dimensions (WxDxH) cm 37x46x69 42x49x70
Bath opening (WxL) cm 23x14 18x12
Bath depth cm 20 15
Filling volume liters 9 ... 16 5,5 ... 8
Weight kg 48 55
Ambient temperature °C 5 ... 40 5 ... 40
Mains power connection 230 V/50 Hz V/ Hz 207-253 / 50 207-253 / 50
Current input (at 230 V) A 13 14
Current input (at 230 V) (CH) A 9+3 9+4

Mains power connection 230 V/60 Hz V/ Hz 207-253 / 60 207-253 / 60
Current input (at 230 V) A 13 14

Mains power connection 115 V/60 Hz V/ Hz ------ -----­Current input (at 115 V) A ------ ------

Mains power connection 100 V/60 Hz V/ Hz
Current input (at 100 V) A

All measurements have been carried out at: rated voltage and frequency
ambient temperature: 20 °C Technical changes without prior notification reserved.

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Safety installations according to IEC 61010-2-010:
Excess temperature protection adjustable from 0 °C ... 230 °C
Low liquid level protection float switch
Classification according to DIN 12876-1 class III
Supplementary safety installations
Early warning system for low level float switch
High temperature warning function optical + audible (in intervals)
Low temperature warning function optical + audible (in intervals)
Supervision of working sensor plausibility control
Reciprocal sensor monitoring between
working and safety sensors difference >25 °C
Alarm message optical + audible (perma nent)
Warning message optical + audible (in intervals)
Environmental conditions according to IEC 61 010-1:

Use only indoor.
Altitude up to 2000 m - normal zero.
Ambient temperature: +5 ... +40 °C (for storage and transportation)
Air humidity:
Max. rel. humidity 80 % for temperatures up to +31 °C,

linear decrease down to 50 % relative humidity at a temperature of +40 °C
Protection class according to IEC 60 529 IP21
Power supply: corresponds to Class I; according to VDE 0106 T1

not for use in explosive atmosphere

Max. mains fluctuations of ±10 % are permissible.
Overvoltage category II
Pollution degree 2
Standards for interference resistance EN 61326: 1997 + A1: 1998 + A2: 2001
Emitted interferences

The unit adheres to the threshold values for emitted interferences

according to table 3.
Interference resistance

The unit conforms to the requirements according to table B.1.

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 <20 °C
Quality of cooling water:

pH at 25 °C 7 to 8.5
Suspended matter <30 mg/l
Size of suspended matter max. 0.1 mm
Growth of algae not permissible

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Operating instructions

16

Operating instructions

1. Operating controls and functional elements

Front view Rear view

MC

°C

100

150

230

0

40

°C

1b1a142322

F25

25

15
A
M
P

15

A
M
P

21a

24b

15b

18a

20

15

21b

19

18b

15a

16

26

FPW

1a
1b

Mains power switch, illuminated for circulator
Mains power switch, illuminated for cooling machine

2 Start / stop key
3 Key for selecting the working temperature
4 Key for selecting the warning and safety values
5 Menu functions
6 Cursor keys (left or right)

7 Edit keys (increase or decrease)

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8 Enter key 1) Store value / parameter

2) Next lower menu level

9 Escape key 1) Cancel entries

2) Return to a higher menu level

Note:
After about 30 seconds, the display automatically returns to the
standard display.

10 MULTI-DISPLAY (LED) temperature indication, menu indication
11 Control indicator –Heating

12 Control indicator – Cooling (without function)
13 Control indicator – Alarm

14

Adjustable excess temperature protection according to
IEC 61010-2-010

15
15a
15b

Socket: control cable of JULABO refrigerated circulator

or output for alarm messages

16

RS232

Interface RS232 : remote control via personal computer

18a Mains fuses: Safety cutout 15 A
18b Mains fuses for cooling machine, T10A

19

Selector dial for cooling machine (only F25, F26, F34)
Position "1" for operation with MC circulator.

20 Built-in mains outlet for connection of circulator
21a

21b

Mains power cable with plug for circulator
Mains power cable with plug cooling machine

22 Drain tap
23 Drain port (not on F12)
24a

24b

Pump connector: f eed
Pump connector: return

25 Venting grid, removable
26

OUT

IN

Only for water cooled models: Cooling water OUTLET and INLET

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Safety notes for the user

18

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 on an even surface on a pad made of non-flammable

material.
F34-MC: The circulator fitted with a stainless steel bridge is placed
on on the back of the bath tank leaving the bath open on the front
side.

• Set selector dial for cooling machine (19) in position "1" for

operation with MC circulator.

(only F25, F26, F34)

• 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.

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MC

19

OUT

IN

¾"

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 refrigerated circulator.
Cooling water pressure 3,5 - 6 bar.
Cooling water temperature <20 °C.

3.2. Bath fluids

Caution:

Carefully read the safety data sheet of the bath fluid used, particulary with
regard to the fire point!
If a bath fluid with a fire point of ≤65 °C is used, only supervised
operation is possible.

Recommended bath fluids:

Bath fluids Temperature range Flash point fire point
deionized water 5 °C ... 80 °C
mixture water/glycol -30 °C bis 50 °C
Thermal M +40 °C ... +170 °C >280 °C >305 °C
Thermal H +20 °C ... +250 °C >270 °C >360 °C
Thermal HY -80 °C ... +55 °C >75 °C >80 °C
Thermal H5S -50 °C ... +105 °C >110 °C >130 °C
Thermal H10S -20 °C ... +180 °C >175 °C >210 °C
Thermal H20S +0 °C ... +220 °C >230 °C >270 °C

Order No. 10 liters Bath fluids Order No. 5 liters
8 940 100 Thermal M 8 940 101
8 940 102 Thermal H 8 940 103
8 940 104 Thermal HY 8 940 105
8 940 106 Thermal H5S 8 940 107
8 940 114 Thermal H10S 8 940 115
8 940 108 ThermalH20S 8 940 109

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Preparations

20

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 50 mm2 /s at the respective working temperature)

• have corrosive characteristics or

• tend to cracking.

ATTENTION: The maximum permissible viscosity is 50 mm2 /s

.

Caution:

The temperature controlling i.e. of fluids in a reactor constitutes normal
circulator practise.

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.

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MC

21

3.3. Tubing

Recommended tubing:

Order No. Length Temperature range
8 930 008 2 m CR® tubing 8 mm inner dia. -20 °C to 120 °C
8 930 010 2 m CR® tubing 10 mm inner dia. -20 °C to 120 °C
8 930 108 1 m Viton tubing 8 mm inner dia. -50 °C to 200 °C
8 930 110 1 m Viton tubing 10 mm inner dia. -50 °C to 200 °C
8 930 410 2 m Insulation for tubing 8 mm or

10 mm inner dia.

-50 °C to 100 °C

8 930 209 0.5 m
8 930 210 1.0 m
8 930 211 1.5 m
8 930 214 3.0 m

Metal tubing, triple insulated,
M16x1 *

-100 °C to +350 °C

8 930 220 0.5 m
8 930 221 1.0 m
8 930 222 1.5 m
8 930 223 3.0 m

Metal tubing, insulated, M16x1 * -50 °C to +200 °C

*) Adapter for metal tubing M10x1 on M16x1 Order No. 8 970 444

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.

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Preparations

22

3.4. Filling / draining

2223

Filling

Take care that no liquid enters the interior of the circulator.

• Recommended maximum filling level with water as bath

fluid: 20 mm below the tank rim

• Recommended maximum filling level with bath oils:

30 mm below the tank rim

i After filling, immerse the samples in the bath or place the

lid on the bath, in case the opening is not to be used.

i The circulator provides an early warning system for low

level (description – please refer to page 30) that may be
triggered when changing samples in the bath.

Draining

• Turn off the circulator and cooling machine.

• Hold the venting grid, pull out and remove.

• Slide a short piece of tube onto the drain port (23) and

hold it into a pail.

• Unscrew the drain tap (22) and empty the unit

completely.

• Tighten the drain tap.

Notice:

Pay attention to the thermal expansion of bath oil during heating to avoid
overflowing of the liquid.
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.

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MC

23

3.5. Temperature application to external systems

RS 232

15

A
M
P

15

A
M
P

24a

24b

The circulator is used for temperature application to
external, closed systems (loop circuit) with
simultaneous temperature application in the
circulator bath.

Connecting the external system

• Unscrew the collar nuts from the pump connector

(24a).

• Slide the tubing onto the pump connectors for

feed and return flow (24a, 24b).

Tubing and insulation for tubing see page 21

Caution: Securely attach all tubing to prevent slipping.

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Operating procedures

24

4. Operating procedures

4.1. Power connection

Caution:

Connect the unit only to a grounded mains power socket!
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.

• Connect the circulator with mains power cable (21a) to the mains

outlet (20).

• Connect the control cable (15) between the connectors T (15a, 15b).

• Connect the refrigerated circulator with mains power cable (21b) to

the mains socket.

4.2. Switching on / Start - Stop

Version
F25

FP50

Switching on:

• Circulator and cooling machine may be turned on and off

with separate mains switches. The integrated control light will
illuminate to indicate that power has beeen applied.

i The unit performs a self-test. All segments of the 4-digit

MULTI-DISPLAY (LED) and all indicator lights will
illuminate.
Then the software version (example: V1.00) and the
configuration (example: c225) of the unit appears.
The display „OFF“ or „R OFF“ indicates the unit is ready to
operate.

i The circulator enters the operating mode activated before

switching the circulator off:
keypad control mode (manual operation, factory setting)
or
remote control mode (operation via personal computer).

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25

Start:

• Press the start/stop key. .

The MULTI-DISPLAY (LED) indicates the actual bath
temperature. The circulating pump starts with a slight delay.

Stop:

• Press the start/stop key. .

The MULTI-DISPLAY (LED) indicates the message "OFF".

Caution: F12-MC

If the circulator is turned off with the mains switch (1a), or in operating
state „OFF“ or „rOFF“, the refrigerating unit is not switched off
simultaneously.
Turn off the refrigerating unit with the mains switch (1b) as well.
Danger of freezing when water is used as bath fluid!

i Control of the cooling machine:

With the mains switch (1b) turned on, the circulator
automatically switches the cooling machine off and on.

• It is switched off, if:

- the actual working temperature is increased by >30 °C
(cooling is not required).

- the heater operates at full power (>800 W) for longer than 5
minutes.

• It is switched on, if:

- cooling is necessary for maintaining the bath temperature.
After switch-off, the cooling machine automatically switches
on only after a delay of 5 minutes for protecting the cooling
compressor.

i To save energy, turn off the cooling machine with the mains

switch (1b) whenever cooling is not required.

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Operating procedures

26

AUTOSTART ON / OFF

ΠKeep depressed enter and the start/stop key

• and turn on the circulator with the mains power switch.

For a short while the MULTI-DISPLAY indicates the effective
start mode:

ð AUTOSTART on.
ð AUTOSTART off.

NOTE:

The circulator 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“ or „rOFF“, resp. on the
MULTI-DISPLAY (LED). A complete shutdown of the main
functional elements such as heater and circulation pump is
effected simultaneously.

Should such a safety standard not be required, the
AUTOSTART function (automatic start mode) may be
activated, thus allowing the start of the circulator directly by
pressing the mains power switch or using a timer.

Warning:

For supervised or unsupervised operation with the AUTOSTART function,
avoid any hazardous situation to persons or property.
The circulator does no longer conform to N.A.M.U.R. recommendations.

Take care you fully observe the safety and warning functions of the
circulator.

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MC

27

5. Setting the temperatures

è

The function of the key is configurable.

1. If the key is pressed, normally only one adjustable working

temperature is displayed (factory setting).

2. Press the button to call up the menu , then

assign a menu with 3 pre-adjustable setpoints to the
key. (see page 39)

5.1. 1-setpoint mode

Example: Actual value

Setpoint ê

è

è

Actual value ê

è

1. Press the key. The setpoint value instead of the actual

value is indicated on the display. The value can now be
changed.

2. Change the value: (Example: 30.0 °C to 65.0 °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).

3. Press enter to store the value.

i Setting can be carried out in the start/stop condition.

5.2. 3-setpoint mode

Factory settings:

25 °C

37 °C

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.

i Setting can be carried out in the start/stop condition.

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Setting the temperatures

28

Example: Setting working temperature "t 3":

Identifier of a
menu window

Example: Indication of
effective actual value

1. Press the key until the desired menu window is

indicated on the MULTI-DISPLAY (LED).
Example: t 3

2. Press enter to indicate the adjusted value for t 3 on

the MULTI-DISPLAY (LED).
Example: 70.0 °C (last digit blinks)

3. 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 to change the
selected numeral (-, 0, 1, 2, 3, ... 9).

Example: .

4. Press enter to store the selected value.

Press to update the display immediately.

i In the >Start< condition, the circulator immediately uses

this value for control of the working temperature.

F

Notice: see chapter

6.3. Limitation of the operating temperature range

Example: Selecting the working temperature

• Press the key until the desired menu window is

indicated on the MULTI-DISPLAY (LED).

• Press enter twice.

The circulator uses the new working temperature value for
temperature control.

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MC

29

6. Safety installations, warning functions

Settings for the excess temperature protection according to
IEC 61010-2-010 and for the high and low temperature
warning functions are made

in a menu that is called up with the key .

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.
The alarm is indicated by optical and audible signals
(continuous tone) and on the MULTI-DISPLAY (LED)
appears the error message "Error 14".

1. Press the key and call up the menu .

2. Press enter .

The adjusted cut-out value is indicated on the MULTI­DISPLAY (LED).

3. Set the new cut-out value using a screwdriver via the

MULTI-DISPLAY (LED). (Example: 100 °C)

4. Press to update the display immediately.

Recommendation:

Set the excess temperature protection at 5 to 10 °C above the
working temperature setpoint.

Warning:

The excess temperature protection >tSA< 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!

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Safety installations, warning functions

30

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 defined

fluid level K.

An audible warning (interval tone) sounds and on
the MULTI-DISPLAY (LED) the message
"E 40" appears.

Refill bath fluid!

2. Switch in stage 2 recognizes a low fluid level L.

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
>CODE 01< appears on the MULTI-DISPLAY
(LED).

Turn off the unit with the mains switch, refill bath fluid and
turn the unit on again!

3. Float

4. Circulating pump

5. Heater

Important: Check the safety installations from time to time.
(see page 46)

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 pre­heated to the actual bath temperature! Explosion hazard at higher
temperatures!

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MC

31

6.2. High and low temperature warning functions

Factory settings:

High temperature limit

t High 205 °C

Low temperature limit

t Low -55 °C

If for a sensitive temperature application task adherence to a
working temperature value (setpoint) is to be supervised, then
set high and low temperature warning values.
In the example below, the >Setpoint< of 85 °C is surrounded
by the values > t High < 87 °C and > t Low < 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 > Li < (Warning or
Alarm).

(see chapter 6.4. Change-over of the warning function to
shutdown function).

1. Press the key until the menu item

or is displayed.

2. Press enter to indicate the adjusted value on the

MULTI-DISPLAY (LED) (digit blinks).

3. 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).

4. Press enter to store the selected value.

Press to update the display immediately

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Safety installations, warning functions

32

i 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 >t High< 5 °C to10 °C
above the working temperature setpoint

Set the low temperature warning value >t Low< 5 °C to 10 °C
below the working temperature setpoint

6.3. Limitation of the operating temperature range

Factory settings:

t HighSetpoint: 200 °C

t LowSetpoint: -50 °C

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 Setpoint 1, 2, 3 and also for > t High <
and > t Low < (see page 31) are automatically defered within
the limit range.

1. Press the key until the menu item

or is displayed.

2. Press enter to indicate the adjusted value on the

MULTI-DISPLAY (LED) (digit blinks).

3. 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).

4. Press enter to store the selected value.

Press to update the display immediately.

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33

6.4. Change-over of the warning function to shutdown function

Factory setting: Li 0

t High

High temperature limit

t Low

Low temperature limit

For the two menu items > t High < and > t Low < 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 31)

• Setting >Li / 0<

An audible warning (interval tone) sounds and a meassage
appears on the MULTI-DISPLAY (LED).
t High t Low

or

• Setting >Li / 1<

A complete shutdown of heater and circulating pump is
effected.
An audible alarm (continuous tone) sounds and a message
appears on the MULTI-DISPLAY (LED).
t High t Low

or .

1. Press the key until the menu item

is displayed.

2. Press enter to indicate the adjusted parameter on the

MULTI-DISPLAY (LED) (digit blinks).

3. Select the parameter with the keys (0 / 1).

4. Press enter to store the selected parameter.

Press to update the display immediately.

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Menu functions

34

7. Menu functions

Ø Pump

The term „menu functions“ refers to adjustments such
as

• electronically adjustable pump capacity

Ø ATC

• ATC - Absolute Temperature Calibration

ATC status
Type (Art): >1. point<, >2. point < or >3. point <

calibration

2 values per calibration point

ttx = Defined temperature value of the calibration
point. This value is automatically stored with
>Ctx< and can be indicated for control purposes.

Ctx = The „Calibration value“ is determined with
a temperature measuring device and stored under
menu item > Ctx <.

Ø

• Change-over the key mode.

Ø Remote
Ø Baudrate

Ø Handshake
Ø Parity

• Online communication, with adjustable interface

parameters

Ø XP
Ø Tn
Ø Tv

• PID temperature control, control parameters

Ø Reset

• Factory setting

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MC

35

7.1. Setting the pump pressure

Factory setting:

Stage 2

The pressure of the circulating pump is adjustable in four
grades

Flow rate: 11 ... 16 l/min
Pump pressure: 0.22 ... 0.45 bar

1. Press the button until the menu item

is displayed.

2. Press enter to indicate the parameter.

3. Select the parameter with the keys (1 ... 4).

4. Press enter to store the selected parameter.

Press to update the display immediately.

1

2

Adjusting the pump flow
The pump flow is pre-adjusted in the factory and can be
modified to suit user requirements.

• Using a screwdriver turn the screw (1) anti-clockwise

by 360 °.

• Using flat pliers turn the marking of the slide (2) to the

desired position.

• Tighten the screw.

Examples:

external 80 %

internal100 %

internal 20 %

A

B

D

C

Internal applications in the bath

A 100 % internal bath circulation

(for large bath tanks)

B Reduced internal bath circulation

(for smooth surface of bath fluid)

External/internal applications

C 40 % external discharge,

60 % internal circulation
(for large bath tanks)

D 80 % external discharge,

20 % internal circulation
(for small bath tanks)

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Menu functions

36

7.2. ATC Absolute Temperature Calibration, 3-point calibration

ATC serves to compensate a temperature difference that might
occur between circulator and a defined measuring point in the
bath tank because of physical properties.

Examples:
1-point calibration

°C

°C

T 1

T

3-point calibration

°C

°C

T 1

T

TT 1 = Original curve

Principle:
For ATC calibration, in steady state the bath temperature at
the location of the temperature sensor (T M) is determined
at the respective adjusted working temperature. This value
is then set on the circulator in the menu >ATCalibration<
under menu item >Calwert X<.
This can be a 1-point, 2-point or 3-point calibration.

M = Temperature measuring instrument with

temperature sensor (TF)
B = Bath tank with T = circulator
TM = Temperature on measuring point
TT = Temperature on circulator

1.

2.

The menu ATC - Absolute Temperature Calibration
is structured in 2 levels.

ATC status
Calibration type: 1-, 2-, 3-point calibration

2 values per calibration point

ttx = Temperature indication on circulator

Indicates the value of the calibration point entered last.

Ctx = Calibration temperature x

Input of the new value for the calibration curve.

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37

Examples:
TT = 80.0 °C
TM = 79.7 °C

TT = 120.0 °C
TM = 119.5 °C

TT = 160.0 °C
TM = 159.3 °C

Example: 3-point calibration
In the temperature range of 80 °C to 160 °C the calibration

curve of the temperature sensor (TT) should be assimilated to
the actual temperatures on the measuring point (TM).

1. Calibration procedure:

Press and set the first temperature value under e g.

for example (example 1st value = 80 °C).

2. Wait until this temperature is maintained constant in the

bath for about 5 minutes.

ATC status

Factory setting: YES

Example

3. Call up the >ATC< menu:

Press the button until the menu item is
displayed and press enter to switch to menu level 2.

4. Adjusting menu item >ATC Status<: .

Press enter and indicate the parameter.
Select the parameter with the keys (no / YES).

Press enter to store the selected parameter.

>no< During the calibration process >no< needs to be set.

Continue: Press the button to call up the menu
item >Art<.

>YES< The controller of the circulator uses the new

calibration curve. Set this parameter after the
calibration process.

Continue: Press to quit the menu.

5. Determine the calibration type:

(1-point, 2-point or 3-point calibration.)
Press the button until the menu item is

displayed and press enter to indicate the parameter.
Select the parameter with the keys (1, 2, 3).

Press enter to store the selected parameter.

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Menu functions

38

i Depending on which calibration type is selected (1-point,

2-point or 3-point calibration) only the necessary menu
items are indicated.

For 1-point calibration: >tt1< and >Ct1<
For 2-point calibration: >tt1< and >Ct1<

>tt2< and >Ct2<

For 3-point calibration: >tt1< and >Ct1<

>tt2< and >Ct2<
>tt3< and >Ct3<

From example on
page 37 for TM = Ctx

= 79.7 °C

= 119.5 °C

= 159.3 °C

6. Setting and storing the value:

Press the button until the menu item

is displayed and press enter to open the
input window.
Read the value of TM on the temperature measuring
device and enter the respective 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).

Press enter and the circulator also stores the value
of TT as value for (80.00 °C).

The first of the 3 points is now calibrated.

i The values for >ttx< can only be displayed, but they cannot

be modified.

7. Repeat the calibration procedure for 120 °C and 160 °C.

Store the values under or resp.

F

Notice:
In the ATC status > YES<, the ATC calibration curve always

affects the effective working temperature (also the one set via
the interface).

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MC

39

7.3. Change-over of the key mode

Factory setting: no

Normally, the key is used to indicate only one adjustable
working temperature.

Press the key, to call up a menu with 3 pre-adjustable
setpoints.

1. Press the button until the menu item is

displayed.

2. Press enter to indicate the parameter.

3. Select the parameter with the keys (YES/no).

4. Press enter to store the selected parameter.

>no< Key in 1-setpoint mode
>YES< Key in 3-setpoint mode

Continue: Press to quit the menu.

7.4. Remote control: activate – deactivate

Factory setting: no

The circulator is to be prepared for remote control by a
personal computer via the serial interface RS232: Set the
menu item >remote< from >no< to >YES<.

1. Press the button until the menu item is

displayed.

2. Press enter to indicate the parameter.

3. Select the parameter with the keys (YES/no).

4. Press enter to store the selected parameter.

>no< No remote control via RS232
>YES<

Continue: Press to quit the menu.

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Menu functions

40

The display changes from

keypad control mode (manual operation) to
remote control mode (operation via personal computer).

7.5. Interface - Baud rate, Handshake, Parity

Factory settings:

4.8 kBauds
2 = even
Hardware handshake

To allow communication of the circulator with a PC or a
superordinated process control system take care the interface
parameters of both units match.

Adjustable interface parameters

Example: 4.8 kbauds

Baud rate 4.8 = 4800 bauds

9.6 = 9600 bauds

19.2 = 19200 bauds

38.4 = 38400 bauds

Example: 2 = even

Parity 0 = no Parity

1 = odd
2 = even

Handshake

0 = Xon/Xoff protocol software handshake
1 = Protocol RTS/CTS hardware handshake

Data bits = 7; Stop bits = 1

1. Press the button until the desired menu item is

displayed.

2. Press enter to indicate the parameter.

3. Select the parameter with the keys .

4. Press enter to store the selected parameter.

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41

7.6. Control parameters – Xp, Tv, Tn

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

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::
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.

Setting range:
0 ... 99

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 menu item is

displayed.

2. Press enter to indicate the parameter.

3. 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).

4. Press enter to store the selected value.

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Menu functions

42

Optimization instructions for the PID control parameters:

optimum setting

°C

t

The heat-up curve reveals inappropriate control
settings.

Inappropriate settings may produce the following heat-up curves:

Xp too low

°C

t

Tv/Tn too low

°C

t

Xp too high or Tv too high

°C

t

Tv/Tn too high or Xp too high

°C

t

7.7. Reset

Use this to reset all values to factory setting.

Factory setting: no

1. Press the button until the menu item is

displayed.

2. Press enter to indicate the parameter (no).

3. Press the keys to select the parameter (YES).

4. Press enter to confirm the reset.

After the reset is carried out, the parameter is automatically
set to >no<.

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43

8. Troubleshooting guide / Error messages

+U

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 MULTI-DISPLAY (LED) indicates the cause for the
alarm in form of a code.

Warning without a complete shutdown of the unit
The MULTI-DISPLAY (LED) 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.

• The circulator 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.

• During the self-test after switch-on a short-circuit is registered

between pin 2 and pin 4 of the control cable or the control cable
is interrupted during operation.
Reconnect the cable or eliminate the short-circuit.

• Excess temperature warning or

Excess temperature alarm with a complete shutdown of the main
functional elements being effected.
Warn type: >Li 0 = Warning< or > Li 1 = Alarm<

• Low temperature warning or

Low temperature alarm with a complete shutdown of the main
functional elements being effected.
Warn type: >Li 0 = Warning< or > Li 1 = Alarm<

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Troubleshooting guide / Error messages

44

• 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 (I2C-BUS errors)

• 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.

• Cooling of the condenser is affected. Clean air-cooled condenser.

Check the flow rate and cooling water temperature on water­cooled condenser.

• Compressor stage 1 does not work.

After a short cooling interval, the compressor motor will be
automatically reconnected and the message "CODE 21" no
longer appears.

• Compressor stage 2 does not work.

• Cooling compressor overload protection

The motor of the cooling compressor is equipped with an
overload protector, which will be activated by excessive
temperature in the capsule or by excessive current consumption.

• Causes for motor disconnection:

- poor air circulation

- small distance to walls

- dirt accumulated on condenser

- high ambient temperature

- switch-off and on for short intervals

• Excess temperature in stage 1 of the compressor.

• Excess temperature in stage 2 of the compressor.

• Short-circuit in the control cable for the refrigerating machine

during self-test.

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45

• Cable of the excess temperature sensor interrupted or short-

circuited.

• 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.

Special message „CONFIGURATION ERROR“
The configuration of the circulator does not conform to its present
use.

Press enter to automatically perform a single modification of
the configuration.
Then contact an authorized JULABO service station.

Disturbances that are not indicated.

The electronic pump motor is overload-protected by an electronic
current limiter. If viscosity of the bath fluid is or becomes too high,
the motor stops running.

15

A
M
P

Mains fuses:
The mains fuses on the rear of the unit are safety cutouts – 15A.

Cooling machine: Fuse T 10.0 A, dia.5 x 20 mm
The mains fuses (8b) on the rear of the unit may easily be
exchanged as shown on the left.

Warning:

Before exchanging the fuses, turn off the mains power switch and
disconnect the power plug from the mains socket!
Only use fine fuses with a nominal value as specified.

Example:

Manufacturer Supplier Type Order No.
Wickmann Wickmann G- fuse insert

T10,0A 5x20 mm

No. 19195

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Safety recommendations

46

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.

• Connect the unit only to a grounded mains power socket!

• 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).

• 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 shut-down 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.

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47

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.

/ Control output

The T connector may be used for control of JULABO
refrigerated circulators or as output for alarm messages.

1 3

245

Circuit: Operation = relay powered

Alarm = relay not powered

Pin assignment:
Pin Signal

1 +24 V (I max. current 25 mA)
2 0 V
3 Alarm relay
4 Reserved - do not use!
5 Cooling pulse

RS232 serial interface

This port can be used to connect a computer with an RS232
cable for remote control of the circulator.

RS232C

Pin assignments RS232:

Pin 2 RxD Receive Data
Pin 3 TxD Transmit Data
Pin 5 0 V Signal GND
Pin 6 DTR Data terminal ready
Pin 7 RTS Request to send
Pin 8 CTS Clear to send

RS232 interface cable 9-pin / 9-pin, 2.5 m
Order No.: 8 980 073

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Remote control

48

11. Remote control

11.1. Setup for remote control

RS232C

• Check the interface parameters for both interfaces (on

circulator and PC) and make sure they match.
(Serial interface - see page 40)

• Set the menu item >Remote< from >no< to >YES<.

(see page 39).

• Connect both units with an interface cable.

F

Like all parameters which can be entered through the keypad,
interface parameters are stored in memory even after the circulator
is turned off.

11.2. Communication with a PC or a superordinated data system

If the circulator is put into remote control mode via the menu item
>Remote<, the MULTI-DISPLAY (LED) will read „R -OFF-„ =
REMOTE STOP. The circulator is now operated via the computer.
In general, the computer (master) sends commands to the
circulator (slave). The circulator sends data (including error
messages) only when the computer sends a query.

F

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 commands are divided into in or out commands.

in commands: asking for parameters to be displayed
out commands: setting parameters

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MC

49

F

The out commands are valid only in remote control mode.

Examples:
Command to set the working temperature >t 1< to 55,5 °C:

out_sp_00 ⇔ 55.5↵

Command to ask for the working temperature >t 1<:

in_sp_00↵

Response from the circulator:

55.5↵

11.3. List of commands

out commands: Setting parameters or temperature values.

Command Parameter Response of circulator

version None Number of software version (V X.xx)
status none Status message, error message (see page 51 )

out_mode_01 0 Use working temperature >t 1<
out_mode_01 1 Use working temperature >t 2<
out_mode_01 2 Use working temperature >t 3<
out_mode_05 0 Stop the unit = R –OFF-.
out_mode_05 1 Start the unit.

out_sp_00 xxx.xx Set working temperature. „t 1“
out_sp_01 xxx.xx Set working temperature. „t 2“
out_sp_02 xxx.xx Set working temperature. „t 3“
out_sp_03 xxx.xx Set high temperature warning limit „t High“
out_sp_04 xxx.xx Set low temperature warning limit „t Low“
out_sp_07 x Set the pump pressure stage. (1 ... 4)

out_par_06 xxx Xp control parameter of the internal controller.
out_par_07 xxx Tn control parameter of the internal controller.
out_par_08 xxx Tv control parameter of the internal controller.

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Remote control

50

in commands: Asking for parameters or temperature values to be displayed.

Command Parameter Response of circulator

in_pv_00 none Actual bath temperature.
in_pv_01 none Heating power being used (%).
in_pv_03 none Temperature value registered by the safety sensor.
in_pv_04 none Setpoint temperature („SafeTemp“) of the excess

temperature protection

in_sp_00 none Working temperature „t 1“
in_sp_01 none Working temperature „t 2“
in_sp_02 none Working temperature „t 3“
in_sp_03 none High temperature warning limit „t High“
in_sp_04 none Low temperature warning limit „t Low“
in_sp_07 none Pump pressure stage

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_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_mode_01 none Selected setpoint:

0 = Setpoint „t 1“
1 = Setpoint „t 2“
2 = Setpoint „t 3“

in_mode_05 none

Circulator in Stop/Start condition:
0 = Stop

1 = Start

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51

11.4. Status messages

Status messages Description

00 MANUAL STOP

Circulator in „OFF“ state.

01 MANUAL START

Circulator in keypad control mode.

02 REMOTE STOP

Circulator in „r OFF“ state.

03 REMOTE START

Circulator in remote control mode.

11.5. Error messages

Error messages

Description

-01 LOW LEVEL ALARM

Low liquid level alarm.

-02 REFRIGERATOR ALARM

Control cable of the refrigerated circulator or
MVS solenoid valve controller short-circuited or
interrupted.

-03 EXCESS TEMPERATURE
WARNING

High temperature 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 I2C-BUS ERROR

Internal error when reading or writing the I2C
bus.

-08 INVALID COMMAND

Invalid command.

-09 COMMAND NOT
ALLOWED IN CURRENT
OPERATING MODE

Invalid command in current operating mode.

-10 VALUE TOO SMALL

Entered value too small.

-11 VALUE TOO LARGE

Entered value too large.

-12 TEMPERATURE
MEASUREMENT ALARM

Error in A/D converter.

-13 WARNING : VALUE
EXCEEDS TEMPERATURE
LIMITS

Value lies outside the adjusted range for the high
and low temperature warning limits. But value is
stored.

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Maintaining the cooling performance

52

Error messages

Description

-14 EXCESS TEMPERATURE
PROTECTOR ALARM

Excess temperature protection alarm

-20 WARNING: CLEAN
CONDENSOR OR CHECK
COOLING WATER CIRCUIT
OF REFRIGERATOR

Cooling of the condenser is affected.
Clean air-cooled condenser.
Check the flow rate and cooling water
temperature on water-cooled condenser.

-21 WARNING: COMPRESSOR
STAGE 1 DOES NOT WORK

Compressor stage 1 does not work.

-22 WARNING: COMPRESSOR
STAGE 2 DOES NOT WORK

Compressor stage 2 does not work.

-23 WARNING: HIGH
TEMPERATURE ON
COMPRESSOR STAGE 1

Excess temperature on compressor stage 1.

-24 WARNING: HIGH
TEMPERATURE ON
COMPRESSOR STAGE 2

Excess temperature on compressor stage 2.

-25 REFRIGERATOR WARNING

Error in the refrigerating machine.

-30 CONFIGURATION ERROR:
CONFIRM BY PRESSING
<ENTER> ON CIRCULATOR

The configuration of the circulator does not
conform to its present use.

Press enter to automatically perform a
single modification of the configuration.

-33 SAFETY SENSOR ALARM

Excess temperature sensor short-circuited or
interrupted.

-40 NIVEAU LEVEL WARNUNG

Low liquid level warning in the internal
reservoir.

12. Maintaining the cooling performance

To maintain the full cooling performance, clean the
condenser from time to time.

• Switch off the unit, disconnect mains power cable.

• Hold the venting grid, pull out and remove.

• Clean the ribbed condenser with a vacuum cleaner.

• Replace the venting grid.

• Switch on the unit.

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MC

53

13. JULABO Service – Online remote diagnosis

JULABO circulators of the HighTech series 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.com \ 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 circulator 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/Settings<,
>Alarmspeicher/Alarms stored<,
>Blackbox<

ç see example

• After pressing >Speichern/Save< a text

file is compiled. The program proposes a
filename ­>C:\model description and barcode no.<.
Modifications are possible.

• E-mail this file to

[e-mail], JULABO's
service department. JULABO is thus able
to provide rapid support.

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Cleaning the unit

54

14. Cleaning the unit

Caution:

Before cleaning the unit, disconnect the power plug from the mains socket!
Prevent humidity from entering into the circulator.

For cleaning the bath tank and the immersed parts of the circulator, 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 circulator 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.

• 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.

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