Operating manual
Recirculating Coolers

RS232

ALARM

FL300

FL300
FL601

English19534818_a.doc

02.05.11

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 ofoperating and possibilities of our circulators. For optimum utilization of all functions, we recommendthat you thoroughly study this manual prior to beginning operation.

The JULABO Quality Management System
Temperature control devices for research and industry are developed,
produced, and distributed according to the requirements of
ISO 9001:2008.
Certificate Registration No. 01 100044846

Unpacking and inspecting
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

TABLE OF CONTENTS
1. Intended use....................................................................................................................5
1.1. Description ............................................................................................................5
2. Operator responsibility – Safety instructions....................................................................5
2.1. Disposal ................................................................................................................8
3. Technical specifications...................................................................................................9
4. Safety notes for the user................................................................................................15
4.1. Explanation of safety notes .................................................................................15
4.2. Explanation of other notes ..................................................................................15
4.3. Safety instructions...............................................................................................16
5. Installation .....................................................................................................................18
5.1. Tubing .................................................................................................................21
6. Operating controls and functional elements...................................................................22
7. Operating procedures ....................................................................................................24
7.1. Bath fluids ...........................................................................................................24
7.2. Power connection................................................................................................25
7.3. Filling...................................................................................................................26
7.4. Switching on / Start - Stop...................................................................................27
7.5. Setting the temperatures.....................................................................................28
3

7.6.
7.7.

AUTOSTART ON / OFF ..................................................................................... 29
Remote control: activate – deactivate ................................................................ 30

8. Safety installations ........................................................................................................ 31
8.1. Excess temperature protection........................................................................... 31
8.2. Low level protection............................................................................................ 31
9. Troubleshooting guide / Error messages ...................................................................... 32
10.

Electrical connections........................................................................................... 34

11.
Remote control ..................................................................................................... 35
11.1. Setup for remote control ..................................................................................... 35
11.2. Communication with a PC or a superordinated data system .............................. 36
11.3. List of commands ............................................................................................... 38
11.4. Status messages................................................................................................ 39
11.5. Error messages .................................................................................................. 39

4

12.

Cleaning / repairing the unit.................................................................................. 40

13.

Adequate storing of operating manual.................................................................. 42

14.

Draining ................................................................................................................ 43

15.

WARRANTY PROVISIONS.................................................................................. 44

1.

Intended use

JULABO recirculating coolers have been designed for temperature application to specific fluids. The
pump connections can be used for cooling applications in an external circuit at a constanttemperature.
JULABO water baths are not suitable for direct temperature control of foods, semiluxury foods and tobacco, or pharmaceutical and medical products. Direct temperature
control means unprotected contact of the object with the bath medium (bath fluid).

1.1.

Description
The recirculating coolers are operated via the splash-proof keypad. The
implemented microprocessor technology allows to set and to store the setpoint thatcan be indicated on the LED temperature display.
The PID temperature regulation is used to withdraw heat from the bath fluid bymeans of the cooling machine and to automatically regulate the required need.

PID1
RS232
2.

Electrical connections:
1. The serial interface RS232 allows modern process technology without
additional interface.
2. Alarm output for external alarm message.

Operator responsibility – Safety instructions

The products of JULABO ensure safe operation when installed, operated, and maintained according
to common safety regulations. This section explains the potential dangers that may arise when
operating the circulator and also specifies the most important safety precautions to preclude these
dangers as far as possible.
5The operator is responsible for the qualification of the personnel operating the units.
The personnel operating the units should be regularly instructed about the dangers involved with
their job activities as well as measures to avert these dangers.
Make sure all persons tasked with operating, installing, and maintaining the unit have read andunderstand the safety information and operating instructions.
When using hazardous materials or materials that could become hazardous, the unit may be
operated only by persons who are absolutely familiar with these materials and the unit. 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.
884 Marcon Boulevard
Allentown, PA 18109

Phone:+1(610) 231-0250
Fax: +1(610) 231-0260
info @ julabo.com
www.julabo.com

Safety recommendations for the operator
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 thattransmitting devices (e.g. cellular phones) should not be used in the immediate vicinity. Magnetic
6

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.
Appropriate Operation
Only qualified personnel is authorized to perform configuration, installation, maintenance and repairsof the water bath.
Routine operation can also be carried out by untrained personnel who should however be instructedby trained personnel.

Use
For the use according to the intended purpose, special material requirements have to be respected(bath fluids). Only use non-acid and non corroding materials.
Observe all warnings for the used materials (bath fluids) and the respective instructions (safety data
sheets). Only use the unit in well ventilated areas. (see page 18).
The recirculating coolers are not for use in explosive atmosphere

When using hazardous materials or materials that could become hazardous, the operator must affix
the enclosed safety labels to the front of the unit so they are highly visible:
If this unit is intended for use within the United States of America, all 3 warning labels must be
affixed to the housing of the unit prior to use. Directions for the positioning of the individual warning
7

labels are enclosed with the warning labels included in the delivery. Warning labels must be easily
visible to users.
1

Warning label W00:
Colors: yellow, black
Danger area. Attention! Observe instructions.
(operating manual, safety data sheet)2

Mandatory label M018:
Colors: blue, white
Carefully read the user information prior to beginning operation.
Scope: EUor
2

Semi S1-0701 Table A1-2 #9
Carefully read the user information prior to beginning operation.
Scope: USA, NAFTA

3

Warning label Proposition 65

Observe the instructions in the manuals for instruments of a different make that you connect to thecirculator, particularly the corresponding safety instructions. Also observe the pin assignment ofplugs and technical specifications of the products.

2.1.

DisposalThis unit contains the refrigerants R134a or R404A, which at this time are not considered harmful tothe ozone layer. However, over the long operating period of the unit, disposal rules may change.
Therefore, only qualified personnel should handle the disposal.
83.

Technical specifications

Recirculating Cooler
Working temperature range
Temperature stability
Temperature selection:
via key padremote control via personal computer
Temperature indication:
Resolution
Temperature control
Temperature sensor
Excess temperature protection

FL300
°C
°C

-20 ... +40±0.5
digitalindication on LED-DISPLAY
indication on monitor

Low liquid level protection

LED-DISPLAY
0.1
PID 1
Pt 10085 °C - fixed value
float switch

Electrical connections:
Computer interface
Alarm output

RS232
for external alarm signal

Circulating pump:discharge, max.at 0 bar
pressure, max. at 0 Liters

°C

l/min
bar

15
0,35
9

Recirculating Cooler

FL300
bar

Filling level indicator
Filling volume
from ... toDimensions (WxLxH)
WeightAmbient temperature range
Return flow temperature
IP class according to IEC 60 529

Literscm
kg°C°C

Cooling compressor
Refrigerant

sight glass
3 ... 4.525x50x60
39
5 ... 4080 max.
IP 21
1- stage / air cooled
R134a

Cooling capacity (at A, B, C)
Medium: Mixture water-glycol

°C
kW

+20
0.3

A Mains power connection 230 V/50 Hz
Current input at 230 V
B Mains power connection 208 - 220 V/60 Hz
Current input at 208V / 220 V
C Mains power connection 115 V/60 Hz
Current input at 115 V

V/ Hz
A
V/ Hz
A
V/ Hz
A

207-253 / 50
3.0
197 - 242 / 60
3.0 / 3.0
103-127 / 60
6.0

10

+10
0 -10
0.25 0.2 0.15

-20
0.1

Recirculating Cooler

FL300

Cooling capacity (D at 200 V/50 Hz)
Medium: Mixture water-glycol
Cooling capacity (D at 200 V/60 Hz)
Medium: Mixture water-glycol

°C
kW
°C
kW

+20
0.3
+20
0.3

D Mains power connection 200 V/50-60 Hz

V/ Hz

190-254 / 50
190-244 / 60
3.0

Current input at 200 V

A

+10
0
-10 -20
0.25 0.2 0.15 0.06
+10
0
-10 -20
0.25 0.2 0.15 0.09

All measurements have been carried out at: rated voltage and frequency,
ambient temperature: 20 °C

11

Recirculating Cooler
Working temperature range
Temperature stability
Temperature selection:
via key padremote control via personal computer
Temperature indication:
Resolution
Temperature control
Temperature sensor
Excess temperature protection
Low liquid level protection
Cooling capacity
Medium: Mixture water-glycol
Cooling compressor
Refrigerant
Electrical connections:
Computer interface
Alarm output

12

FL601
°C
°C

°C

°C
kW

-20 ... +40±0.5
digitalindication on LED-DISPLAY
indication on monitor
LED-DISPLAY
0.1
PID 1
Pt 10085 °C - fixed value
float switch+20 +100-5 -20
0.6 0.5 0.4 0.33 0.2
1- stage / air cooled
R404A

RS232
for external alarm signal

Recirculating Cooler
Circulating pump:discharge, max.at 0 bar
pressure, max. at 0 Liters
Filling level indicator
Filling volume
from ... toDimensions (WxLxH)
WeightAmbient temperature range
Return flow temperature
IP class according to IEC 60 529

FL601
l/min
bar
bar
Liters
cm
kg
°C
°C

23
1.0
----sight glass
5.5 ... 832x50x60
48
5 ... 4080 max.
IP 21

Mains power connection 230 V/50 Hz
V/ Hz
207-253 / 50
Current input at 230 V
A
4.6
Mains power connection 208 - 220 V/60 Hz
V/ Hz
197 - 242 / 60
Current input at 208V / 220 V
A
5.0
Mains power connection 115 V/60 Hz
V/ Hz
103-127 / 60
Current input at 115 V
A
9.1
All measurements have been carried out at: rated voltage and frequency,
ambient temperature: 20 °C

13Warning functions and safety installations
Excess temperature protection
Low liquid level protection
Alarm message
Excess temperature - Warning function
Overload protection
Classification according to DIN 12876-1

85 °C - fixed value
float switch
optical + audible (permanent)
75 °C
for compressor and pump motorclass I

Environmental conditions according to IEC 61 010-1:
Use only indoor.
Altitude up to 2000 m - normal zero.
Ambient temperature: +5 ... +40 °C
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
Max. mains fluctuations of ±10 % are permissible.

The unit corresponds to Class I
Overvoltage category
Pollution degree

II
2

Caution:The unit is not for use in explosive environment
Standards for interference resistance according to EN 61326-1
This unit is an ISM device classified in Group 1 (using high frequency for internal purposes) Class A(industrial and commercial range).

14

4.

Safety notes for the user

4.1.

Explanation of safety notes
In addition to the safety warnings listed above, warnings are posted throughout the
manual. These warnings are designated by an exclamation mark inside an equilateraltriangle. “Warning of a dangerous situation (Attention! Please follow the
documentation).”The danger is classified using a signal word.
Read and follow these important instructions.
Warning:
Describes a possibly highly dangerous situation. If these instructions are not followed,
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 property damage may 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.

4.2.

Explanation of other notes
Note!
Draws attention to something special.
Important!
Indicates usage tips and other useful information.
15

4.3.

Safety instructions
Follow the safety recommendations to prevent damage to persons or property.
Further, the valid safety instructions for working places must be followed.
•
•
•
•
•
•
•

•
•
•
•
•
•
16

Only connect the unit to a power socket with earthing contact (PE – protective
earth)!
The power supply plug serves as a safe disconnecting device from the line andmust always be easily accessible.
Place the instrument on an even surface on a pad made of non-inflammablematerial.
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.
Never operate the unit without bath fluid in the bath.
Do not drain the bath fluid while it is hot or cold!
Check the temperature of the bath fluid prior to draining (by switching the unit on
for a short moment for example).
Use suitable connecting tubing.
Make sure that the tubing is securely attached.
Avoid sharp bends in the tubing, and maintain a sufficient distance fromsurrounding walls.
Regularly check the tubing for material defects (e.g., for cracks).
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 theunit.
• Always turn off the unit and disconnect the mains cable from the power source
before cleaning the unit.
• Always empty the bath before moving the unit.
• Transport the unit with care.
• Sudden jolts or drops may cause damage in the interior of the unit.
• Observe all warning labels.
• Never remove warning labels.
• Never operate equipment with damaged mains power cables.
• Repairs are to be carried out only by qualified service personnel.

•

Risk of injury for hands. Close cover carefully.

•

Some parts of the bath tank and the pump connections may become extremely
cold during continuous operation. Therefore, exercise particular caution whentouching these parts.

WARNING
This product contains chemicals known to the state of California to cause cancer,
birth defects or other reproductive harm.

17

5.

Installation•

Place the unit on an even surface on a base made ofnonflammable material.
• Cooling machine, pump motor and electronics produce intrinsic
heat that is dissipated via the venting openings.! Never coverthese openings!
• Keep at least 20 cm of open space on the front and rear venting
grids.
• 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 rejects to theenvironment. (Max. permissible ambient temperature: 35 °C).
For a fault (leakage) in the refrigeration system, the standard EN
378 prescribes a certain room space to be available for each kg
of refrigerant.
The necessary amount of refrigerant is specified on the typeplate.
> For 0.25 kg of refrigerant R134a, 1 m3 of space is required.
> For 0.48 kg of refrigerant R404A, 1 m3 of space is required.
Example:model FL601 with 0.5 kg filling quantity ofrefrigerant R404A = 1.04 m3 volume

18

Example: FL300

•

15
A
M
P

Connect the tubings for cooling the external system tothe pump connectors M16x1 for feed and return (12) on
the rear of the recirculating cooler.
- Feed15
A
M
P– Return•

Connect a piece of tubing to the overflow connector (13)and drain into a suitable vessel, which always has to beplaced lower thant the exit „Overflow“.

•

Do not set up the unit in the immediate vicinity of heatsources 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 downthus ensuring maximum cooling performance of thecompressor.

Caution:Securely attach all tubing to prevent slipping.
19

Notice:
Flood hazard!.
In case the system to be cooled is located at a higher level than the recirculating
cooler, take note of bath liquid flowing back when the unit is switched off.
Return flow safety device
Should the filling volume of the bath tank not be sufficient, prevent the liquid fromflowing back by using shut-off valves..
Order No.
8 970 456

Description
Shut-off valve for loop circuit, M16x1

Suitable for
FL300/FL601

The following questions shall help to recognize possible dangers and to reduce therisks to a minimum.
• Are all tubes and electrical cables connected and installed?
Note:
sharp edges, hot surfaces in operation, moving machine parts, etc.
• What to do when a dangerous substance was spilled on or in the unit?
Before starting to work, obtain information concerning the substance anddetermine the method of decontamination.

20

5.1.

TubingCaution:• 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.

Recommended tubing:
Suitable forOrder No.
®
8930008
1 m CR -tubing 8 mm inner dia. (-20 ... +120°C)
FL300
8930308
1 m Reinforced tubing 8 mm inner dia. (-40 ... +120°C)
FL601
89303121 m Reinforced tubing 12 mm inner dia. (-40 ... +120°C)
FL601
Tubing insulation
89304101 m Insulation, 14 mm inner dia..
89304121 m Insulation, 18 mm inner dia.
8930413
1 m Insulation, 23 mm inner dia.

CR®-tubing 8 mm inner dia
Reinforced tubing 8 mm inner dia.
Reinforced tubing 12 mm inner dia.

Tube clamps
8970480
2 Tube clamps, size 1
89704812 Tube clamps, size 28970482
2 Tube clamps, size 3

CR®-tubing 8 mm inner dia
Reinforced tubing 8 mm inner dia.
Reinforced tubing 12 mm inner dia.

21

6.

Operating controls and functional elements

Example: FL300 Front view
3 2

4Top view

Rear view

1
P
M
A
5
1

10

Push

14b
14a
RS232

11

15

ALARM

5

12
13

Push

6

7
FL300

4
8

4

Protection lid forfill in opening
15 Protection lid forstoring place of
operating manual
9

22

M
A
5
1

M
A
5
1

P

P

15
A
M
P

15
A
M
P

P
M
A
5
1

P
M
A
5
1

P
M
A
5
1

P
M
A
5
1

P
M
A
5
1

P
M
A
5
1

1

Mains power switch, spash-water protectedonoff
Keypad, spash-water protected
Edit keys (set point increase or decrease)
Enter key Store set point value / parameter

2.0
2.1
2.2
3.0
3.1

°C

3.2
3.3

Indication
LED temperature display
Control indicator – CoolingControl indicator – Alarm

4.0
5

Filling opening
Alarm output (for external alarm signal)

6Interface RS232: remote control via personal computer
RS232

7
8
9
10
11
12

10
A
M
P

Filling level indication
Drain port
Venting grid, removable
Mains power cable with plug
Mains circuit breakers (resettable)

Pump connector M16x1:- FeedPump connector M16x1:– Return23

13

Overflow connector

14a
14b
15

Handle: front
Handle: rearProtection lid for storing place of operating manual

7.

Operating procedures

7.1.

Bath fluids
Caution:No liability for use of other bath liquids!
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
Do not use alcohols.
Water:The quality of water depends on local conditions.
• Due to the high concentration of lime, hard water is not suitable for temperature
control because it leads to calcification in the bath.
• Ferrous water can cause corrosion - even on stainless steel.
• Chloric water can cause pitting corrosion.
• Distilled and deionized water is unsuitable. Their special properties cause
corrosion in the bath, even in stainless steel.
Water: - No liablity for use with water.
Danger of freezing at working temperatures <5 °C.

24

Recommended bath fluids:
Bath fluids
soft/decalcified water

Temperature range
5 °C to 80 °C

See website for list of recommended bath fluids.
Contact: see page 6

7.2.

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!
• The power supply plug serves as safe disconnecting device from the line and mustbe always easily accessible.
• Never operate equipment with damaged mains power cables.
• Regularly check the mains power cables for material defects (e.g. for cracks).
Make sure that the line voltage and frequency match the supply voltage specified on
the type plate.

25

7.3.

Filling
Top view

Take care that no liquid enters the interior of the circulating
cooler.

L Connect the tubing from the external system to the pumpconnectors and check for leaks
Respect instructions from page 18 to page 21!

Push

L Check to make sure that the drain tap (8) is closed.

Push

•
•
•
•
Filling level indicator (13)

26

H

•

L

•

Unlock and open lid of fill in opening (4) by slightly pushing.
Fill in tempering fluid up to marking „H“ of the filling levelindicator.
Turn the mains switch (1) on(Switching on - see page 27).
for approx. 4
Switch on unit. To do so press button
seconds.
Tempering fluid is pumped into the externally connected
system.
Refill fluid up to marking „H“.
The recirculating cooler is ready for operation.

7.4.

Switching on / Start - Stop
Switching on:
The recirculating cooler is turned on and off with the mains switch.
The unit performs a self-test. All segments of the 4-digit LED temperature
DISPLAY and all indicator lights will illuminate(as illustrated on the left).
Then the software version and the type of unit is indicated.
Examples: (v 1.02) (FL300)
The display "OFF" indicates the unit is ready to operate (standby mode).
Start:

Press enter
for about 4 seconds.
The LED temperature DISPLAY indicates the actual bathtemperature.

Stop:

for about 4 seconds.
Press enter
Turn the unit off with the mains power switch.

27

7.5.

Setting the temperatures

Factory setting:
25 °C

L Setting can be carried out in the start/stop condition.
1. Press one of the keys
for a short moment.
The setpoint value instead of the actual value is indicated on the display forabout 8 seconds.
The value can now be changed.
2. Change value:Press
to set a higher value.
to set a lower value.
Press
Keep the keys depressed for the value to change fast.
3. Press enter28

to store the value.

7.6.

AUTOSTART ON / OFF
The recirculating cooler 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 (nonautomatic start mode). This safe operating state is indicated by „OFF“ on the
LED temperature display. A complete shutdown of the main functional
elements such as compressor and circulating 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 thecirculator directly by pressing the mains power switch or using a timer.
Keep depressed enterandturn on the unit with the mains power switch.
For a short while the LED DISPLAY indicates the effective start mode:
AUTOSTART on.

AUTOSTART off.

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.

29

7.7.

Remote control: activate – deactivate
The recirculating cooler is to be prepared for remote control by apersonal computer via the serial interface RS232.
Set the interface item from >IOFF< to >ION<.

Remote control: activate – deactivate:(Interface OFF)
(Interface On)• Switch off recirculating cooler by pressing the mains switch andwait approx. 5 seconds.
•

Keep depressed the keys
and enter
simultaneously andturn on the unit with the mains power switch.

>I OFF<No remote control via RS232 (Factory setting)>I On<

Remote control via RS232

L The software version and the type of unit is indicated(see example on the left).
The display "rOFF" indicates the unit is ready to be operated via
remote control.

30

8.

Safety installations

8.1.

Excess temperature protection

8

+

8.2.

This safety installation is independent of the control circuit.
When the temperature of the bath fluid has reached the safety temperature(85 °C), a complete shutdown of the compressor and pump is effected.
The alarm is indicated by optical and audible signals (continuous tone) and on
the LED-DISPLAY appears the error message"Error 14".

Low level protection

8+

This safety installation is independent of the control circuit.
If the low liquid level protection device is triggered, a complete shutdown of
the compressor and circulating pump is effected.
The alarm is indicated by optical and audible signals (continuous tone) and on
the LED-DISPLAY appears the error message"Error 01".

L Turn off the unit with the mains switch, refill bath fluid and turn the unit on
again!
Caution:For refill always use the same bath fluid type that is already in the bath.

31

Notice:
Check the low liquid level protection device at least twice a year!
•9.

To execute a functional test, drain the liquid until the alarm for low liquid level istriggered. Refill liquid afterwards.

Troubleshooting guide / Error messages

8+

Whenever the microprocessor electronics registers a failure, a complete
shutdown of the compressor and circulating pump is performed. The alarm
light " " illuminates and a continuous signal tone sounds.
The LED temperature display indicates the cause for the alarm in form of acode.
Press enter

to quit the audible signal.

•

The recirculating cooler is operated without bath fluid, or the liquid level isinsufficient.
Replenish the bath tank with the bath fluid.
• Tube breakage has occured (insufficient filling level due to excessive bathfluid pumped out). Replace the tubing and replenish the bath tank with thebath fluid.
Cable of the working temperature sensor interrupted or short-circuited.
Error in A/D converter

32

The return temperature is above the switch-off value of the high temperature
protection (85°C). Check dimensioning of application.
Use a stronger recirculating cooler if necessary.
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 service
station.
Warning without a complete shutdown of the unit
Excess temperature warning starting at 75 °C
The return temperature soon reaches the swith-off value of the hightemperature protection (85 °C).

If the unit cannot be returned to operation, contact an authorized JULABO
service station.
Disturbances that are not indicated.
Overload protection:: a) for cooling machineb) for pump motor
After a short cooling interval, the unit will automatically start running.
10
A
M
P

Mains circuit breakers (resettable) –10A.

33

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 areused. The use of longer cables does not affect proper performance of the unit, however
external interferences may have a negative impact on safe operation.
RS232 serial interface
This port can be used to connect a computer with an RS232 cable for remotecontrol of the recirculating cooler.

5

1

9

6

RS232CPin assignments:
Pin 2
RxD
Pin 3
TxD
Pin 5
0V
Pin 7
RTS
Pin 8
CTS

Receive Data
Transmit Data
Signal GND
Request to send
Clear to send

Pin 1; 4; 6, 9 Reserved - do not use!
Accessories:
Order No.
8 980 073
8 900 110

34

Description
RS232 interface cable 9-pol./9-pol. , 2,5 m
USB interface adapter cableAlarm output
Potential-free change-over contact for external alarm signal.

3

1
2

Pin 2 and 3 are connected in case of an alarm.
Pin 2 and 1 are connected in "OFF" or "rOFF" conditionor mains switch "Off".
Switching capacity max. 30 W / 30 VA
Switching voltage max. 30 V∼/−
Switching current max. 1 A

11. Remote control
11.1. Setup for remote control

5

1

9

Check the interface parameters for both interfaces (on recirculating cooler andPC) and make sure they match.

6
RS232

Interface parameters are pre-determined.
Type
Baudrate
ParityHandshake

RS232
4800 bauds
evenhardware handshake35

11.2. Communication with a PC or a superordinated data system
If the recirculating cooler is put into remote control mode the MULTI-DISPLAY(LED) 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
out/in command• space(⇔; Hex: 20) out/in command
•
•
•

36

parameter
period)end of file(the character separating decimals in a group is theout command(↵; Hex: 0D) out/in command

The response (data string) after an in command is always followed by aline feed (LF, Hex: 0A).

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 recirculating cooler 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 commands are divided into in or out commands.
in commands:
asking for parameters to be displayedout commands:
setting parameters
The out commands are valid only in remote control mode.

Examples:Command to set the working temperature to15,5 °C:
out_sp_00 ⇔ 15.5↵
Command to ask for the working temperaturein_sp_00↵
Response from the recirculating cooler:
15.5↵ LF

37

11.3. List of commands
out commands: Setting parameters or temperature values.

CommandParameter

Response of recirculating cooler

out_mode_05

0

Stop the unit = R –OFF-.

out_mode_05

1

Start the unit.

out_sp_00

xxx.xxSet working temperaturein commands: Asking for parameters or temperature values to be displayed.

CommandParameter

Response of recirculating cooler

versionnone

Number of software version (V X.xx)

statusnone

Status message, error message (see page 39 )in_pv_00

none

Actual bath temperature.

in_sp_00

none

Working temperaturein_mode_05

none

Recirculating cooler in Stop/Start condition:
0 = Stop
1 = Start38

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.

-05 WORKING SENSOR ALARM

Working temperature sensor short-circuited orinterrupted.

-03 EXCESS TEMPERATUREWARNING

High temperature warning. Starting at 75 °C(no deactivation)
The return temperature soon reaches the switch-off
value of the high temperature warning function (85 °C)-07 I2C-BUS ERRORInternal 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 SMALLEntered value too small.

-11 VALUE TOO LARGEEntered value too large.
39

Error messages

Description-12 TEMPERATURE MEASUREMENT
ALARM

Error in A/D converter.

-14 EXCESS TEMPERATURE
PROTECTOR ALARM

The return temperature is above the switch-off value ofthe high temperature warning function of 85 °C.
Check dimensioning of application.
Use a stronger recirculating cooler if necessary.

12. 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 circulator.
Electrical connections and any other work must be performed by qualified personnel
only.
40

Notice:
Risk of injury for hands when mounting the venting grid.
To maintain the full cooling performance, clean the condenser from time to time.

RS232

ALARM

•

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.

Cleaning:
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.

41

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.
• 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 forproviding improved performance of a unit.

13. Adequate storing of operating manual
Store the operating manual at the foreseen place at the unit and lock it bymeans of the protection lid (15).

4214. Draining
Notice:Store and dispose the used bath fluid according to the laws for environmental
protection.
Risk of injury for hands when mounting the venting grid.

RS232
RS232

•

Turn off the unit and disconnect the mains
cable from the power source.

••

Hold the venting grid, pull out and remove.
Slide a short piece of tube onto the drain
connection (8) and hold it into a container.

•

Loosen the drain screw a few turns and drain
the unit completely.

•

Close the drain tap and replace the venting
grid.

ALARM

ALARM

43

15. WARRANTY PROVISIONS
The following Warranty Provisions shall apply to products sold in North America by Julabo (“Seller”) to the entity shown asbuyer (“Buyer”) on Seller’s invoice.
1.
Initial Warranty. Upon Seller’s receipt of payment in full for the products and subject to Buyer’s
compliance with the terms of sale and any other agreement with Seller relating to the products, Seller warrants to the Buyer
that the products manufactured by the Seller are free from defects in material and workmanship for a period not to exceed
two (2) years or ten thousand (10,000) hours of operation, whichever comes first, from the date the product is shipped bySeller to Buyer (the “Initial Warranty”).
2.
EXCLUSION OF ALL OTHER EXPRESS WARRANTIES; EXCLUSION OF ALL IMPLIEDWARRANTIES. OTHER THAN THE INITIAL WARRANTY, NO OTHER EXPRESS WARRANTIES ARE MADE. ALL
IMPLIED WARRANTIES OF EVERY TYPE AND KIND, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE, ARE EXCLUDED IN ALL RESPECTS
AND FOR ALL PURPOSES. SELLER DISCLAIMS AND MAKES NO IMPLIED WARRANTIES WHATSOEVER.
3.
Exclusions. The Initial Warranty does not include damage to the product resulting from accident, misuse,
improper installation or operation, unauthorized or improper repair, replacement or alteration (including but not limited to
repairs, replacements, or alterations made or performed by persons other than Seller’s employees or authorized
representatives), failure to provide or use of improper maintenance, unreasonable use or abuse of the product, or failure tofollow written installation or operating instructions. Buyer must return the product’s record of purchase to the Seller or one
of Seller’s authorized representatives within thirty (30) days of the date the product is shipped by Seller to Buyer in order tomake a claim under the Initial Warranty. Notwithstanding anything contained herein to the contrary, all glassware, including
but not limited to reference thermometers, are expressly excluded from the Initial Warranty.

44

4.
Buyer’s sole remedies; Limitations on Seller’s Liability. Buyer’s sole and exclusive remedy under theInitial Warranty is strictly limited, in Seller’s sole discretion, to either: (i) repairing defective parts; or (ii) replacing defective
parts. In either case, the warranty period for the product receiving a repaired or replaced part pursuant to the terms of theInitial Warranty shall not be extended. All repairs or replacements performed by Seller pursuant to these Warranty
Provisions shall be performed at Seller’s facility in Allentown, Pennsylvania, U.S.A. or Vista, California, U.S.A or at thefacility of an authorized representative of Seller, which location shall be determined by Seller in its sole discretion; provided,
however, that Seller may, in its sole discretion perform such repairs or replacements at Buyer’s facility in which case Buyer
shall pay Seller’s travel, living and related expenses incurred by Seller in performing the repairs or replacements at Buyer’s
facility. As a condition precedent to Seller’s obligation to repair or replace a product part under the Initial Warranty, Buyer
shall (i) promptly notify Seller in writing of any such defect; (ii) shall have returned the product’s record of purchase to Seller
or to one of Seller’s authorized representatives within thirty (30) days of the date the product is delivered to Buyer; and (iii)
assist Seller in all respects in its attempts to determine the legitimacy and basis of any claims made by or on behalf ofBuyer including but not limited to providing Seller with access to the product to check operating conditions. If Buyer does
not provide such written notice to Seller within the Initial Warranty period or fails to return the product’s record of purchaseas set forth above, Seller shall have no further liability or obligation to Buyer therefore. In no event shall Seller’s liability
under the Initial Warranty exceed the original purchase price of the product which is the subject of the alleged defect.
5.
THE REMEDIES PROVIDED IN THE INITIAL WARRANTY ARE THE SOLE AND EXCLUSIVEREMEDIES AVAILABLE TO THE BUYER. NOTWITHSTANDING ANYTHING TO THE CONTRARY CONTAINEDHEREIN, AND EVEN IF THE SOLE AND EXCLUSIVE REMEDIES FAIL OF THEIR ESSENTIAL PURPOSE FOR ANY
REASON WHATSOEVER, IN NO EVENT SHALL SELLER BE LIABLE FOR BUYER’S MANUFACTURING COSTS,
LOST PROFITS, GOODWILL, OR ANY OTHER SPECIAL, INDIRECT, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
DAMAGES TO BUYER OR ANY THIRD PARTY AND ALL SUCH DAMAGES ARE HEREBY DISCLAIMED.
6.
Assignment. Buyer shall not assign any of its rights or obligations hereunder without the prior written
approval of Seller; provided, however, that if Buyer is a distributor of Seller, the rights and obligations of Buyer under these
Warranty Provisions shall inure to the benefit of and be binding upon Buyer’s customers who provide the product’s proof of45

purchase to Seller pursuant to the terms set forth herein. Seller may assign any or all of its rights or obligations hereunderwithout Buyer’s prior consent.
7.
Governing Law. The Warranty Provisions and all questions relating to their validity, interpretation,
performance, and enforcement shall be construed in accordance with, and shall be governed by, the substantive laws of theCommonwealth of Pennsylvania without regard to its principles of conflicts of law.
8.
Waiver. Any failure of the part of Seller to insist on strict compliance with the Warranty Provisions shall noway constitute a waiver of such right. No claim or rights arising out of a breach of the Warranty Provisions by Buyer may bedischarged in whole or in part by a waiver of the claim or right, unless the waiver is in writing signed by an authorized
representative of Seller. Seller’s waiver or acceptance of any breach by Buyer of any provisions of the Warranty Provisions
shall not constitute a waiver of or an excuse for nonperformance as to any other provision of the Warranty Provisions nor as toany prior or subsequent breach of the same provision.
9.
Freight. Buyer will arrange and pay for shipping and handling charges for the unit to be returned to theSeller.Seller will arrange and pay for shipping and handling for the return of the unit to the Buyer.

46

47

JULABO USA, Inc.
884 Marcon Boulevard
Allentown, PA 18109
Phone:+1(610) 231-0250
Fax:+1(610) 231-0260
info @ julabo.com
www.julabo.com
Changes without prior notification reserved Printed in Germany

1.953.4818

Important: keep operating manual for future use
48

04/11