JULABO ED-5 User Manual

English

Operating manual

Open Bath Circulators

ED-5A ED-5M
ED-5

JULABO GmbH
77960 Seelbach / Germany
Tel. [phone] / 51-0
Fax [phone] / 24 91
[e-mail]
www.julabo.de

1.951.0270-V2 06/13
19510270-V2.doc 23.07.13

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 operation
and possible applications of our circulators. For optimal utilization of all functions, we
recommend that 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
and ISO 14001. Certificate Registration No. 01 100044846

Unpacking and inspecting

Unpack the circulator and accessories and inspect them for possible transport damage.
Damage should be reported to the responsible carrier, railway, or postal authority, and a
damage report should be requested. 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

Important: keep operating manual for future use

2

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TABLE OF CONTENTS

Operating manual .................................................................................................................... 4

1. Intended use ................................................................................................................... 4

1.1. Description .................................................................................................................. 4

2. Operator responsibility – Safety recommendations ......................................................... 4

2.1. Disposal ...................................................................................................................... 6

2.2. EC Conformity ............................................................................................................ 7

2.3. Warranty conditions .................................................................................................... 7

2.4. Technical specifications .............................................................................................. 8

Operating instructions ........................................................................................................... 10

3. Safety notes for the user ............................................................................................... 10

3.1. Explanation of safety notes ....................................................................................... 10

3.2. Explanation of other notes ........................................................................................ 10

3.3. Safety recommendations .......................................................................................... 10

4. Operating controls and functional elements .................................................................. 13

5. Preparations .................................................................................................................. 14

5.1. Installation ................................................................................................................. 14

5.2. Bath fluids ................................................................................................................. 14

5.3. Filling / Draining ........................................................................................................ 15

5.4. Temperature application to external systems ........................................................... 16

5.5. Tubing ....................................................................................................................... 16

5.6. Adjusting the pump flow ............................................................................................ 17

5.7. Countercooling .......................................................................................................... 18

6. Operating procedures ................................................................................................... 19

6.1. Power connection ..................................................................................................... 19

6.2. Switching on / Start – Stop ........................................................................................ 19

6.3. Automatic / non-automatic start mode ...................................................................... 20

6.4. Setting the temperatures ........................................................................................... 21

6.5. Safety installations according to IEC 61010-2-010 ................................................... 21

6.5.1. Excess temperature protection .......................................................................... 21

6.5.2. Low liquid level protection ................................................................................. 21

7. Troubleshooting guide / Error messages ...................................................................... 22

8. Cleaning the unit ........................................................................................................... 23

8.1. Cleaning of bath tanks made of Plexiglas® and Makrolon® ..................................... 23

9. Repairing the unit .......................................................................................................... 24

3

Operating manual

Operating manual

1. Intended use

JULABO circulators have been designed to control the temperature of specific fluids in a bath
tank.

JULABO circulators 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 circulators are operated via the splash-proof keypad. The implemented

microprocessor technology allows to set and to store the setpoint that can
be indicated on the LED temperature display.

PID1

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

requirements of the bath.

 Safety installations conforming to IEC 61010-2-010

The excess temperature protection is a safety installation independent from
the control circuit.
The safety value is set using a tool (screwdriver).
If the low level protection device is triggered, a complete shutdown of the
heater and circulating pump is effected.

2. Operator responsibility – Safet y recommendations

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.

4

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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.

If you have any questions concerning the operation of your unit or the information in this
manual, please contact us!

Contact:

Handling:

 Nevertheless, avoid strikes to the housing, vibrations, damages to the keypad foil (keys,

display) or contamination.

 Make sure the product is regularly checked for proper condition.
 Regularly check (at least every 2 years) the proper condition of the mandatory, warning,

prohibition and safety labels.

 Take care that the mains supply features a low impedance to avoid any negative affects on

the instrument being operated in the same mains.

 This unit is designed for operation in a controlled electromagnetic environment. This

means that transmitting devices (e.g. cellular phones) should not be used in the immediate
vicinity.
Magnetic radiation may influence other units with components susceptible to magnetic
fields (e.g. a monitor). We recommend to keep a minimum distance of 1 m.

 Permissible ambient temperature: max. 40 °C, min. 5 °C.
 Permissible relative air humidity: 50 % (40 °C).
 Do not store in an aggressive atmosphere. Protect from contaminations.
 Do not expose to sunlight.

JULABO GmbH
Eisenbahnstraße 45
77960 Seelbach / Germany

Tel. [phone] / 51-0 [e-mail]
Fax [phone] / 24 91 www.julabo.de

Appropriate operation:

Only qualified personnel is authorized to perform configuration, installation, maintenance and
repairs of the circulator.
Routine operation can also be carried out by untrained personnel who should however be
instructed by trained personnel.

Use:

The bath may not be filled with flammable materials. Fire hazard!
Only use recommended materials (bath fluids). Only use recommended materials (bath fluids).
Only use non-acid and non corroding materials.

When using hazardous materials or materials that could become hazardous, the operator
must affix the enclosed safety labels (1 + 2) to the front of the unit so they are highly visible:

5

Operator responsibility – Safety recommendations

1

2

or
2

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

Mandatory label M018: Colors: 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: USA, NAFTA

Warning label W26: Colors: yellow, black
Hot surface warning.

(The label is put on by JULABO)

2.1. Disposal

Do not dispose of the unit with household waste!
However, over the long operating period of the unit, disposal rules may change. Therefore,
only qualified personnel should handle the disposal.

Valid in EU countries
See the current official journal of the European Union – WEEE directive.
Directive of the European Parliament and of the Council on waste electrical
and electronic equipment (WEEE).
This directive requires electrical and electronic equipment marked with a
crossed-out trash can to be disposed of separately in an environmentally
friendly manner.
Contact an authorized waste management company in your country.
Disposal with household waste (unsorted waste) or similar collections of
municipal waste is not permitted!

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2.2. EC Conformity

The products described in the operating instructions conform to the
requirements of the following European guidelines:

Directive of the European Parliament and of the Council on the

approximation of the laws of the Member States relating to machinery.

EMC guideline with respect to legal harmonization of the member countries

concerning electromagnetic compatibility.

JULABO GmbH
Eisenbahnstr. 45
77960 Seelbach / Germany

2.3. Warranty conditions

JULABO GmbH warrants its products against defects in material or in workmanship, when
used under appropriate conditions and in accordance with appropriate operating instructions

for a period of ONE YEAR.

Extension of the warranty period – free of charge

With the ‘1PLUS warranty’ the user receives a free of charge extension to the warranty of up
to 24 months, limited to a maximum of 10 000 working hours.

To apply for this extended warranty the user must register the unit on the JULABO web site

www.julabo.de, indicating the serial no. The extended warranty will apply from the date of

JULABO GmbH’s original invoice.

JULABO GmbH reserves the right to decide the validity of any warranty claim. In case of
faults arising either due to faulty materials or workmanship, parts will be repaired or replaced
free of charge, or a new replacement unit will be supplied.

Any other compensation claims are excluded from this guarantee.

7

Operator responsibility – Safety recommendations

2.4. Technical specifications

ED

Temperature selection digital
Temperature indication LED
Resolution °C 0.1
Temperature control PID1
Heater wattage (at 230 V) kW 2,0
Heater wattage (at 115V) kW 1,0
Circulating pump:
discharge, max.at 0 bar l/min 15
pressure, max. at 0 l bar 0.35
Ambient temperature °C 5 ... 40

Mains power connection 230 V/50 Hz V/ Hz 190-253 / 50
Current input (at 230 V) A 9
Mains power connection 230 V/60 Hz V/ Hz 190-253 / 60
Current input (at 208 V / 230 V) A A 8 / 9
Mains power connection 115 V/60 Hz V/ Hz 103-127 / 60
Current input (at 115 V) A 9
Mains power connection 100 V/50-60 Hz V/ Hz 90-110 / 50-60
Current input (at 100 V) A 9

All measurements have been carried out at:
rated voltage and frequency operating temperature: 70 °C
ambient temperature: 20 °C bath fluid: water
Technical changes without prior notification reserved.

0pen Bath Circulators
Bath tanks

ED-5A

Plexiglas 

ED-5M
Makrolon 

ED-5
Stainless

steel
Working temperature range 20 ... 60 20 ... 100 20 ... 100
Temperature stability ±0,03 ±0,03 ±0,03

Bath opening (WxL) cm 12x24 12x24 15x15
Bath depth cm 15 15 15
Filling volume liters 3,5 ... 5 3,5 ... 5 3 ... 4,5
Overall dimensions (WxDxH) cm 14x40x35 14x40x35 17x33x36
Weight kg 5,3 5,2 7,0

8

Safety installations according to IEC 61010-2-010:
Excess temperature protection adjustable from 20 to 120 °C
Low liquid level protection float switch
Classification according to DIN 12876-1 class I
Alarm indication optical + audible (permanent)

Environmental conditions according to EN 61 010, part 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

Max. mains fluctuation of ±10 % are permissible.

Protection class according to EN 60 529 IP21

ED

The unit corresponds to Class I
Overvoltage category II
Pollution degree 2

Caution:

The unit is not for use in explosive atmosphere

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).

9

Operating instructions

Operating instructions

3. Safety notes for the user

3.1. Explanation of safety notes

In addition to the safety warnings listed, warnings are posted throughout the
operating 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 classified using a signal word.
Read and follow these important instructions for averting dangers.

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.

3.2. Explanation of other notes

Note!

Draws attention to something special.

3.3. Safety recommendations

Important!

Indicates usage tips and other useful information.

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

 Only connect the unit to a power socket with earthing contact (PE –

protective earth)!

 The power supply plug serves as safe disconnecting device from the line

and must be always easily accessible.

 Operation is permitted with non-flammable liquids only.
 Place the instrument on an even surface on a pad made of non-

inflammable material.

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 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.
 Check the filling level of the bath fluid from time to time. Pump and heater

must always be fully covered with the bath fluid!

 The instrument is not suited for unsupervised continuous operation.
 Do not drain the bath fluid while it is hot!

Check the temperature of the bath fluid prior to draining (by switching the
unit on for a short moment for example).

 Observe the limited working temperature range when using plastic bath

tanks.

 Employ suitable connecting tubing.

Make sure that the tubes are securely attached.

 Never operate damaged or leaking equipment.
 Always turn off the unit and disconnect the mains cable from the power

source before performing any service or maintenance procedures, or
before moving the unit.

 Always empty the bath before moving the unit.
 Never operate equipment with damaged mains power cables.

 Some parts of the bath cover and the pump connections may become

extremely warm during continuous operation. Therefore, exercise particular
caution when touching these parts.

11

Safety notes for the user

Caution:

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

We do not know which substances are contained within these vessels.
Many substances are:

 inflammable, easily ignited or explosive
 hazardous to health
 environmentally unsafe

i.e.: dangerous
The user alone is responsible for the handling of these substances!

The following questions shall help to recognize possible dangers and to reduce
the risks to a minimum.

 Are all tubes and electrical cables connected and installed?

Note:
sharp edges, hot surfaces in operation, moving machine parts, etc.

 Do dangerous steams or gases arise when heating?

Is an exhaust needed when working?



 What to do when a dangerous substance was spilled on or in the unit?

Before starting to work, obtain information concerning the substance and
determine the method of decontamination.

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.

12

4. Operating controls and functional elements

Front view Rear view

ED

1

2

3

4

5

7

7

Mains power switch, illuminated

Edit keys

Setpoint increase or decrease
Press keys shortly for step-by-step changes,
Keep the keys pressed for fast change of setpoint

OK key (store)

LED temperature display, menu indication

Control indicator –Heating

Control indicator – Alarm

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

8

15

A
M
P

Circulator: Mains circuit breakers (resettable) 15 A

10 Mains power cable with plug

13

Preparations

A

5. Preparations

5.1. Installation

Notice:

Plexiglas and Makrolon baths are not resistent to solvents.
Avoid contamination of the bath fluid with solvents.

Top view

A

 Place the circulator in an upright position.

ED-5A / ED-5M
 The circulator (A) mounted on a stainless steel bridge is

placed on the back of the bath tank.

B

5.2. Bath fluids

Caution:

No liability for use of other bath fluids!

Do not use flammable bath fluids!

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.

Recommended bath fluids:

ED-5
 The circulator (A) mounted on a stainless steel bridge is

placed on the back of bath tank.
Close the bath tank with the bath cover (B).

Bath fluid Temperature range
soft/decalcified water 5 °C to 80 °C

14

Notice:

Please contact JULABO before using other than recommended bath fluids.
Only use non-acid and non corroding bath fluids.

JULABO takes no responsibility for damages caused by the selection of an
unsuitable bath fluid.
Unsuitable bath fluids are liquids which e.g.
 are very highly viscous

(much higher than 30 mm2 /s at the respective working temperature)

 have corrosive characteristics or
 tend to cracking.

5.3. Filling / Draining

ED

See website for list of recommended bath fluids.

Contact: see page 5

Notice: Filling

Check the filling level of the bath fluid from time to time. Pump and heater
must always be fully covered with the bath fluid!

The instrument is not suited for unsupervised continuous operation.

Filling

 Take care that no liquid enters the interior of the circulator.
 Recommended maximum filling level with water as bath liquid:

20 mm below the tank rim

 After filling, immerse the samples in the bath or place the lid on

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

Draining

 Press the mains switch to turn the circulator off.
 Remove the circulator from the bath tank.
 Empty the bath tank.

Notice: Draining

Do not drain the bath fluid while it is hot!
Recommendation: Temperature range 5 °C to 40 °C

Check the temperature of the bath fluid prior to draining (by switching the unit
on for a short moment, for example).

15

Preparations

5.4. Temperature application to external systems

Caution:

Securely attach all tubing to prevent slipping.
If the circulator is operated without external system, close the pump connector

(24a) with the cap nut.

Connecting the external system

 Unscrew the collar nuts from the pump connector (24a).
 Slide the tubing onto the pump connectors for feed (24a) and

return flow (24b). Secure the tubing with tube clamps.

 ED-5A / ED-5M

 ED-5

5.5. Tubing
Recommended tubing:

Order No. Length Temperature range
8930008 1 m CR® tubing 8 mm ID -20 °C ... 120 °C
8930010 1 m CR® tubing 10 mm ID -20 °C ... 120 °C
8930108 1 m Viton tubing 8 mm ID -50 °C ... 200 °C
8930110 1 m Viton tubing 10 mm ID -50 °C ... 200 °C

8930410 1 m Insulation for tubing 8 mm ID or 10 mm ID -50 °C ... 100 °C

8970480 2 Tubing clamps, size 1 for tubing 8 mm ID
8970481 2 Tubing clamps, size 2 for tubing 10 or 12 mm ID

16

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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.

5.6. Adjusting the pump flow

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

2

 Using a screwdriver turn the screw (1) anti-clockwise by
 Using flat pliers turn the marking of the slide (2) to the

1

 Tighten the screw.

Examples:

Internal applications in the bath

External/internal applications

360 °.
desired position.

A 100 % internal bath circulation (for large bath tanks)
B Reduced internal bath circulation

(for smooth surface of bath fluid)

C 40 % external discharge,

60 % internal circulation (for large bath tanks)

D 80 % external discharge,

20 % internal circulation (for small bath tanks)

17

Preparations

5.7. Countercooling

Notice:

Observe the laws and regulations of the water distribution company valid in the
location where the unit is operated.

Securely attach all tubing to prevent slipping.

For applications near the ambient temperature, the cooling coil
must be connected to the water mains.

 Using tubing, connect the cooling coil (25a) to the tap water

supply, and lead the tap water in a sink through the return

connector (25b).
Cooling coil
 ED-5A / ED-5M

Cooling coil
 ED-5

 A specific water flow rate of 45 ml/minute is sufficient to

compensate for the characteristic temperature.

NOTE: Immersion coolers are used for countercooling instead of tap water in
applications below room temperature.

Order No. Description
9 650 820 FT200
9 650 840 FT400
8 970 400 Clamp for cooler probe for open baths

 For applications near ambient temperature (20 °C), the

cooling water temperature should at least be 5 °C below the
working temperature.

18

6. Operating procedures

6.1. Power connection

Caution:

 Only connect the unit to a power socket with earthing contact (PE –

protective earth)!

 The power supply plug serves as safe disconnecting device from the line

and must be always easily accessible.

 Never operate equipment with damaged mains power cables.
 Regularly check the mains power cables for material defects (e.g. for

cracks).

 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.

ED

6.2. Switching on / Start – Stop

Caution:

Observe the limited working temperature range when using plastic bath tanks.
Bath tanks made of Plexiglas  up to 60 °C.
Bath tanks made of Makrolon  up to 100 °C.

 Switching on:

Turn the unit on with the mains power switch. (1).

 The unit performs a self-test. The segments of the 4-digit LED

temperature DISPLAY and all indicator lights will illuminate (as
illustrated on the left).
Then the software version (example: 11.0) appears. The
display „OFF“ indicates the unit is ready to operate. (standby
mode).

Start:

 Press the key for about 4 seconds.

The LED temperature DISPLAY indicates the actual bath
temperature.

Stop:

 Press the key for about 4 seconds.

 Turn the unit off with the mains power switch.

19

Operating procedures

6.3. Automatic / non-automatic start mode

 Keep depressed the key and
 turn on the circulator with the mains power switch.

For a short while the LED temperature 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.

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

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“ on the LED temperature display. A complete
shutdown of the main functional elements such as heater 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 the circulator directly by pressing the mains power switch or
using a timer.

20

The instrument is not suited for unsupervised continuous operation.

6.4. Setting the temperatures

ED

Factory setting: 25 °C

 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 for about 8 seconds. The value can now be changed.

2. Change value:

Press to set a higher value.
Press to set a lower value.

Keep the keys depressed for the value to change fast.

3. Press the key to store the value.

6.5. Safety installations according to IEC 61010-2-010

Check the safety installations at least twice a year (see page 12)!

6.5.1. 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 LED-DISPLAY appears the error message
"Erro 14".

Setting range: 20 °C to 120 °C
 Using a screwdriver turn the setting screw to the desired value.

Recommendation:
Set the excess temperature protector at 5 to 10 °C above the
working temperature setpoint.

6.5.2. Low liquid level protection

This safety installation is independent of the control circuit.
If the low liquid level protection device is triggered, a complete
shutdown of the heater 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".

 Turn off the unit with the mains switch, refill bath fluid and turn

the unit on again!

21

Troubleshooting guide / Error messages

7. Troubleshooting guide / Error messages

+

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 LED temperature display indicates the cause for the alarm in form
of a code.

Press the key 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.

 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 35 K.

 Error in A/D converter
 The excess temperature value lies below the working temperature

setpoint.
Set the excess temperature to a higher value.

 Cable of the excess temperature sensor interrupted or short-

circuited.

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.

Disturbances that are not indicated.

Pump motor overload protection
The pump motor is protected against overloading. After a short cooling
interval, the motor will automatically start running.

15

A
M
P

Circulator: Mains circuit breakers (resettable) 15 A

22

8. Cleaning 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.

Cleaning

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.

ED

8.1. Cleaning of bath tanks made of Plexiglas® and Makrolon®

Bath tanks made of Plexiglas® and Makrolon® are used when processes within

the samples have to be visually observed. The transparency of the bath tanks
must not be ruined when cleaning them.

Caution:

Unsuitable cleaning products for bath tanks made of Plexiglas® and
Makrolon®.

These baths tanks are not resistant to solvents and pure alcohol.
Incorrect cleaning products cause opacity of the tank’s surface, cause stress

cracks or dissolve the adhesive. Bath tanks made of Plexiglas® and Makrolon®
will leak.

 Bath tanks have to be wet-cleaned – never rub dry! Cloths and sponges

used for cleaning must not be dirty (abrasive particles, dust).

 Use a dampened microfiber cloth for a good, streak-free cleaning.
 For cleaning use only warm water with a few drops of detergent and a soft

cloth.

 In case of heavy, especially greasy soiling benzene-free clean petrol

(benzine, light petrol) may be used.

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Repairing the unit

Other cleaning products Never use solvents

as:

Alcohol up to 5% alcohol (1

Petroleum ether (1
Javelle water(1

Ammonia solution(1
Soap water (2
Soda-water (2

Acetone
Carbon Tetrachloride
Methyl Ethyl Keton
Paint thinner
as well as
Petroleum
Spirit
Leachate

(1

- Observe the safety data sheet

(2

- Maximum water temperature 60 ° C for Plexiglas®

Never use:

Abrasive products
Degreasing sharp
cleaning agents
Solvents
Spray cleaner for glass
Windows
Floor cloth

Brushes

9. Repairing the unit

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

 Attach a short fault description.
 When returning a unit, take care of careful and adequate

 JULABO is not responsible for damages that might occur from

personnel.

packing.

insufficient packing.

JULABO reserves the right to carry out technical modifications with
repairs for providing improved performance of a unit.

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