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English
Operating manual
Open Bath Circulator
EH-5 EH-13 EH-19
EH-27 EH-33 EH-39
JULABO GmbH
77960 Seelbach / Germany
Tel. +49 (0) 7823 / 51-0
Fax +49 (0) 7823 / 24 91
info@julabo.de
1.951.0257-V2 06/13
19510257-V2.doc Print date: 11.07.13
www.julabo.de
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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
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EH
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 .................................................................................................................. 15
5.3. Filling / Draining ......................................................................................................... 17
5.4. Temperature application to external systems ............................................................ 18
5.4.1. Tubing ............................................................................................................... 18
5.5. Adjusting the pump flow ............................................................................................ 19
5.6. Countercooling .......................................................................................................... 20
6. Operating procedures .................................................................................................... 21
6.1. Power connection ...................................................................................................... 21
6.2. Switching on / Start - Stop ......................................................................................... 21
6.3. Automatic / non-automatic start mode ....................................................................... 22
6.4. Setting the temperatures ........................................................................................... 22
6.5. ATC - Absolute Temperature Calibration ................................................................... 23
6.6. Timer function ............................................................................................................ 24
6.6.1. Setting the time ................................................................................................. 24
6.6.2. Timer operation ................................................................................................. 24
6.7. Safety installations according to IEC 61010-2-010 .................................................... 25
6.7.1. Excess temperature protection ......................................................................... 25
6.7.2. Low liquid level protection ................................................................................. 25
7. Troubleshooting guide / Error messages ....................................................................... 26
8. Electrical connections .................................................................................................... 27
9. Cleaning / repairing the unit ........................................................................................... 28
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Operating manual
Operating manual
1. Intended use
JULABO circulators have been designed to control the temperature of specific fluids in a bath
tank. The units feature pump connections for temperature control of external systems (loop
circuit).
JULABO circulators are not suitable for direct temperature control of foods,
semi-luxury 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.
The PID temperature control adapts the heat supplied to the thermal
requirements of the bath.
ATC - Absolute Temperature Calibration (1-point calibration)
PID1
40
0
80
120
160
°C
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.
Electrical connection:
Alarm output for external alarm message or control of JULABO refrigerating
baths.
2. Operator responsibility – Safety 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.
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
and understand the safety information and operating instructions.
When using hazardous materials or materials that could become hazardous, the circulator
may be operated only by persons who are absolutely familiar with these materials and the
circulator. These persons must be fully aware of possible risks.
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If you have any questions concerning the operation of your unit or the information in this
manual, please contact us!
EH
Contact:
Safety instructions for the operator:
You have received a product designed for industrial use. Nevertheless, avoid strikes to the
housing, vibrations, damage to the operating-element panel (keypad, display), and
contamination.
Make sure the product is checked for proper condition regularly (depending on the
conditions of use). Regularly check (at least every 2 years) the proper condition of the
mandatory, warning, prohibition and safety labels.
Make sure that the mains power supply has low impedance to avoid any negative effects on
instruments being operated on 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 affect other devices with components sensitive to magnetic fields
(e.g., monitors). We recommend maintaining a minimum distance of 1 m.
Permissible ambient temperature: max. 40 °C, min. 5 °C.
Permissible relative humidity: 50% (40 °C).
Do not store the unit in an aggressive atmosphere.
JULABO GmbH
Eisenbahnstraße 45
77960 Seelbach / Germany
Tel. +49 (0) 7823 / 51-0 info@julabo.de
Fax +49 (0) 7823 / 24 91 www.julabo.de
Protect the unit from contamination.
Do not expose the unit to sunlight.
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 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. The unit is not for use in explosive atmosphere.
Only use recommended materials (bath fluids). Only use non-acid and non corroding materials.
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Operator responsibility – Safety recommendations
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:
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)
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.
2.1. Disposal
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.
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
EH
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.
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Operator responsibility – Safety recommendations
2.4. Technical specifications
EH
Working temperature range °C 20 ... 150
Temperature stability °C ±0.03
Temperature selection digital
Temperature indication LED
Resolution °C 0.1
ATC - Absolute Temperature Calibration 1-point
Temperature control PID1
Heater wattage (at 230 V) kW 2.0
Heater wattage (at 115 V) kW 1.0
Circulating pump:
discharge, max.at 0 bar l/min 15
pressure, max. at 0 l bar 0.35
Electrical connections:
External alarm device Vdc/mA 24-0 Vdc / max. 25mA
Ambient temperature °C 5 ... 40
Mains power connection 230 V/50 Hz V/ Hz 190-253 / 50
Current input (208V / 230 V) A 8 / 9
Mains power connection 230 V/60 Hz V/ Hz 190-253 / 60
Current input (208V / 230 V) 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/60 Hz V/ Hz 90 ... 110 / 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.
Open Bath Circulators EH-5 EH-13 EH-19
Bath opening (WxL) cm 15x15 18x30 36x30
Bath depth cm 15 15 15
Filling volume from ... to liters 3 ... 4.5 8 ... 13 14 ... 19
Overall dimensions (WxDxH) cm 17x33x36 39x33x37 57x33x37
Weight kg 7.0 8.0 11.0
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EH
Open Bath Circulators EH-27 EH-33 EH-39
Bath opening (WxL) cm 36x30 67x30 36x30
Bath depth cm 20 15 30
Filling volume from ... to liters 21 ... 27 24 ... 33 33 ... 39
Overall dimensions (WxDxH) cm 57x37x42 91x33x38 54x34x52
Weight kg 13.0 20.0 19.0
Safety installations according to IEC 61010-2-010:
Excess temperature protection adjustable from 0 °C ... 170 °C
Low liquid level protection float switch
Classification according to DIN 12876-1 class III
Alarm message optical + audible (permanent)
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.
Protection class according to IEC 60 529 IP21
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).
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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
Follow the safety recommendations to prevent damage to persons or property. Further, the
valid safety instructions for working places must be followed.
Important!
Indicates usage tips and other useful information.
Only connect the unit to a power socket with an earthing contact (PE –
protective earth)!
The power supply plug serves as a safe disconnecting device from the line
and must always be easily accessible.
Place the unit on an even surface on a base made of nonflammable
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EH
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.
Never operate the unit without bath fluid in the bath.
Set the excess temperature safety installation at least 25 °C below the fire
point of the bath fluid.
Do not drain the bath fluid while it is hot!
Check the temperature of the bath fluid prior to draining (e.g., by switching
the unit on for a short moment).
Pay attention to the thermal expansion of bath oil during heating to avoid
overflowing of the fluid.
Prevent water from entering the hot bath oil.
Use 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).
Never operate damaged or leaking units.
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 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 units with damaged mains power cables.
Repairs are to be carried out only by qualified service personnel.
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.
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Safety notes for the user
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.
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.
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4. Operating controls and functional elements
Front view Rear view
EH
1
Mains power switch, illuminated
2
Edit keys
Setpoint increase or decrease
Press keys shortly for step-by-step changes,
Keep the keys pressed for fast change of setpoint
3
4
OK key (store)
LED temperature display, menu indication
5
6
7
8
40
120
160
0
°C
Control indicator –Heating
Control indicator – Cooling
Control indicator – Alarm
Adjustable excess temperature protection
according to IEC 61010-2-010
9
Socket: control cable of JULABO refrigerated circulator
or output for alarm messages
10 Mains power cable with plug
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15
A
M
P
Mains fuses: Safety cutout 15 A
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Preparations
A
5. Preparations
5.1. Installation
Top view
Top view
Place the circulator in an upright position.
The circulator (A) fitted with a stainless steel bridge is
placed on the right side of the bath tank leaving the bath
open on the left side.
EH-13, EH-19, EH-27, EH-33, EH-39
A lift-up bath cover or flat stainless steel bath cover is
available as optional accessory.
Lift-up bath cover:
Order-No. 8970253 Bath tank 13
Order-No. 8970254 Bath tank 19, 27
Order-No.. 8970257 Bath tank 33
Flat stainless steel bath cover:
Order-No. 8970263 Bath tank 39
Order-No. 8970290 Bath tank 13
Order-No. 8970291 Bath tank 19, 27
Order-No. 8970292 Bath tank 33
EH-5
The circulator (A) mounted on a stainless steel bridge is
placed on the back of bath tank.
B
Close the bath tank with the bath cover (B).
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5.2. Bath fluids
Caution:
Carefully read the safety data sheet of the bath fluid used, particularly with
regard to the fire point!
If a bath fluid with a fire point of 65 °C is used, only supervised operation is
possible.
Water:
The quality of water depends on local conditions.
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:
Bath fluid Temperature range
EH
soft/decalcified water 5 °C to 80 °C
JULABO
Description
Thermal
H10
Order Number 10 liters 8 940 114
5 liters 8 940 115
Temperature range °C -20 ... 180
Flash point °C 190
Fire point °C 216
Color clear
See website for list of recommended bath fluids.
ATTENTION: The maximum permissible viscosity is 30 mm
2
/s
Caution:
Fire or other dangers when using bath fluids that are not recommended:
Please contact JULABO before using other than recommended bath fluids.
Use only nonacidic and noncorrosive bath fluids.
JULABO assumes no liability for damage caused by the selection of an
unsuitable bath liquid.
Unsuitable bath fluids are fluids which, e.g.,
are highly viscous
(much higher than recommended at the respective working temperature)
have a low viscosity and have creep characteristics
have corrosive characteristics or
tend to crack.
No liability for use of other bath fluids!
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Preparations
Caution:
Fire or other dangers when using bath fluids that are not recommended:
Please contact JULABO before using other than recommended bath fluids.
Use only nonacidic and noncorrosive bath fluids.
JULABO assumes no liability for damage caused by the selection of an
unsuitable bath liquid.
Unsuitable bath fluids are fluids which, e.g.,
are highly viscous
(much higher than 30 mm2 x s-1 at the respective working temperature)
have a low viscosity and have creep characteristics
have corrosive characteristics or
tend to crack.
See website for list of recommended bath fluids.
Contact: see page 5
No liability for use of other bath fluids!
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5.3. Filling / Draining
Notice:
Pay attention to the thermal expansion of bath oil during heating to avoid
overflowing of the liquid.
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).
Store and dispose the used bath fluid according to the laws for
environmental protection.
EH
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
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.
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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
(14a) with the cap nut.
The circulator is used for temperature application to external,
closed systems (loop circuit).
The circulator is used for temperature application to external, closed
systems (loop circuit) with simultaneous temperature application in
the circulator bath.
EH-5
14b
14a
EH-13 / EH-19 / EH-27 / EH-33 / EH-39
Connecting the external system
Unscrew the collar nuts from the pump connector
(14a).
Slide the tubing onto the pump connectors for feed
and return flow (14a, 14b). Secure the tubing with
tubing clamps.
5.4.1. Tubing
Recommended tubing:
Order No. Length Temperature range
8 930 008 1 m CR® tubing 8 mm inner dia. -20 °C to 120 °C
8 930 010 1 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 1 m Insulation for tubing 8 mm or
10 mm inner dia.
8970480 2 Tubing clamps, size 1 for tubing 8 mm ID
8970481 2 Tubing clamps, size 2 for tubing 10 or 12 mm ID
-50 °C to 100 °C
18
*) Adapter for metal tubing M10x1 on M16x1 Order No. 8 970 444
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EH
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.
5.5. 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 360
Using flat pliers turn the marking of the slide (2) to the
1
Tighten the screw.
Examples:
Internal applications in the bath
A
B
intern 100 %
A 100 % internal bath circulation (for large bath tanks)
B Reduced internal bath circulation
External/internal applications
C
intern 20 %
extern 80 %
D
C 40 % external discharge,
D 80 % external discharge,
°.
desired position.
(for smooth surface of bath fluid)
60 % internal circulation
(for large bath tanks)
20 % internal circulation
(for small bath tanks)
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Preparations
5.6. Countercooling
Notice:
Securely attach all tubing to prevent slipping.
Observe the laws and regulations of the water distribution company valid in the
location where the unit is operated.
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).
25a
25b
A specific water flow rate of 45 ml/minute is sufficient
to compensate for the characteristic temperature.
For applications near ambient temperature (20 °C),
the cooling water temperature should at least be 5
°C below the working temperature.
15
A
M
P
15
A
M
P
25a 25b
Installation cooling coil for
EH-13 / EH-19 / EH-27 / EH-33 / EH-39
Order no. 8 970 180
Mounting the cooling coil:
Fix the cooling coil to the bridge.
Cooling coil
EH-5
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 stainless steel or
plexiglass bath tanks
NOTE: Flow-through cooler
Order No. Description
9 655 825 FD200
The FD200 is suitable as cooling device for liquids in closed circuits (loops).
This unit is integrated in the return flow circuit from the external system
connected to a circulator, and continuously withdraws heat from the liquid.
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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.
EH
6.2. Switching on / Start - Stop
Switching on:
Turn the unit on with the mains power switch. (1).
The unit performs a self-test. A few segments of the 4-digit LED
temperature DISPLAY will illuminate.
The display "OFF" indicates the unit is ready to operate
(standby mode).
Start:
Press the
The LED temperature DISPLAY indicates the actual bath
temperature.
Stop:
Press the
key for about 4 seconds.
key for about 4 seconds.
Turn the unit off with the mains power switch.
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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.
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.
Please make sure that all safety devices of the unit have been set properly.
6.4. Setting the temperatures
Factory setting: 25°C
22
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.
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6.5. ATC - Absolute Temperature Calibration
EH
Working temperature
range refer to page 8
80
40
0
120
160
1-point calibration:
The temperature sensor can be calibrated at any value within
the working temperature range.
Set the high temperature cut-off / safety temperature to a
value above the desired adjustment value (Example: 80 °C).
Place a calibrated thermometer (resolution: 0.01 °C) in the
middle of the bath to measure the actual bath temperature.
1. Turn on the circulator with the mains switch.
2. Set the desire adjustment value.
(Example: 50.0 °C) Setting of value see below.
3. Start the unit
Press the key for about 4 seconds.
4. The bath is heated to 50.0 °C.
When the working temperature is reached, wait until the
circulator maintains a constant bath temperature
(after about 3 minutes).
5. Start the calibration:
48.87
Press the hidden key and the key at the same time until
the decimal point of the display blinks.
6. Read the bath temperature from the calibrated thermometer
°C
and set the rounded value on the circulator.
(example: 48.87 °C rounded to 48.9 °C).
7. For a short while the LED temperature DISPLAY indicates the
message „CAL“.
Setting the temperature
Press one of the keys for a short moment.
The setpoint value instead of the actual value is indicated on
the display. The value can now be changed.
Change value:
Press to set a higher value.
Press to set a lower value.
Keep the keys depressed for the value to change fast.
Press the key to store the value.
Notice:
If the determined value is bigger than the tolerance limit of
±5 °C, the value is ignored for the input!
Error message: -Err
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Operating procedures
6.6. Timer function
With the timer function the operating time can be limited to an
allowed time.
6.6.1. Setting the time
The setting can only be made in the Stop status.
Factory setting:
Max. time:
33 h 19 min.
6.6.2. Timer operation
1. Calling the timer function:
Hold the key pressed and activate the edit key
shortly. The time which was set last, is shown.
2. Setting the time:
Activate key
Activate key
Activate the key shortly for single step, hold the key pressed for
quick enumeration.
to set a higher value .
to set a lower value .
3. Store the set value with the key .
Example: 120 minutes
This time remains stored until something is changed.
Starting the timer:
Hold the key pressed and activate the edit key shortly.
Timer operation
The bath temperature is shown. In case of timer operation the
comma in the display is blinking. The set time is counted up to
zero. When the time has elapsed, the circulator stops.
Interrupting the timer / Failure of power supply voltage:
If there is a power failure, or if the unit is switched off at the mains
switch, the circulator memorizes the position of the timer. When
the power supply is switched on again, the circulator only works off
the remaining time.
Canceling the timer operation:
Press the
The timer can be restarted.
key for approx. 4 seconds.
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6.7. Safety installations according to IEC 61010-2-010
Check the safety installations at least twice a year! See page 12.
6.7.1. Excess temperature protection
Warning:
The excess temperature protection 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!
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 "Error
14".
EH
Setting range: 0 °C to 170 °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.
6.7.2. 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!
Warning:
For refill always use the same bath fluid type that is already in the bath.
Bath oils must not contain any water contaminants! Explosion hazard at higher
temperatures!
Recommendation:
Refill bath oils only at a bath temperature below 70 °C!
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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.
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.
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.
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EH
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
Circulator: Mains circuit breakers (resettable) 15 A
8. Electrical connections
Notice:
Use shielded cables only.
The shield of the connecting cable is electrically connected to the plug housing.
/ Control output
connector may be used for control of JULABO refrigerated
The
2
4
5
13
circulators or as output for alarm messages.
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 Reserved - do not use!
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Cleaning / repairing the unit
9. 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.
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.
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 for providing improved performance of a unit.
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