Julabo EH User manual

19530252.doc Druck: 29.04.11
English
Operating manual
Heating Immersion Circulator
EH
JULABO USA, Inc.
884 Marcon Boulevard
Allentown, PA 18109
Phone: [phone]
Fax: [phone]
info @ julabo.com
www.julabo.com

2
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 9001:2008. 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.
1.953.0252 04/11 Printed in Germany Changes without prior notification reserved
Important: keep operating manual for future use

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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. Technical specifications...............................................................................................7
Operating instructions..............................................................................................................9
3. Safety notes for the user..................................................................................................9
3.1. Explanation of safety notes .........................................................................................9
3.2. Explanation of other notes...........................................................................................9
3.3. Safety recommendations.............................................................................................9
4. Operating controls and functional elements...................................................................12
5. Preparations ..................................................................................................................13
5.1. Installation .................................................................................................................13
5.2. Bath fluids..................................................................................................................14
5.3. Temperature application to external systems............................................................15
5.3.1. Pump set...........................................................................................................15
5.3.2. Tubing...............................................................................................................15
5.4. Adjusting the pump flow ............................................................................................16
5.5. Countercooling ..........................................................................................................17
6. Operating procedures....................................................................................................18
6.1. Power connection......................................................................................................18
6.2. Switching on / Start - Stop.........................................................................................18
6.3. Automatic / non-automatic start mode.......................................................................19
6.4. Setting the temperatures...........................................................................................19
6.5. ATC - Absolute Temperature Calibration...................................................................20
6.6. Timer function............................................................................................................21
6.6.1. Setting the time.................................................................................................21
6.6.2. Timer operation.................................................................................................21
6.7. Safety installations according to IEC 61010-2-010....................................................22
6.7.1. Excess temperature protection .........................................................................22
6.7.2. Low liquid level protection.................................................................................22
7. Troubleshooting guide / Error messages.......................................................................23
8. Electrical connections....................................................................................................24
9. Cleaning / repairing the unit...........................................................................................25
10. WARRANTY PROVISIONS...........................................................................................26

Operating manual
4
Operating manual
1. Intended use
JULABO circulators have been designed for temperature application to specific fluids in a bath
tank.
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
PID1
°C
40 80
160
120
0
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)
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!
Contact JULABO USA, Inc.
884 Marcon Boulevard
Allentown, PA 18109
Phone:[phone]
Fax: [phone]
info @ julabo.com
www.julabo.com
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.
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.
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.

Operator responsibility – Safety recommendations
6
Directions for the positioning of the individual warning 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
or
Mandatory label M018: Colors: blue, white
Carefully read the user information prior to beginning operation.
Scope: EU
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
Particular care and attention is necessary because of the wide operating range.
There are thermal dangers:
Burn, scald, hot steam, hot parts and surfaces that can be touched.
Warning label W26: 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.
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. 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
Overall dimensions (WxDxH) cm 13x15x33
Usable bath depth cm 8 ... 14.5
Weight kg 3.3
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.

Operator responsibility – Safety recommendations
8
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 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).

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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.
Important!
Indicates usage tips and other useful information.
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.
•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

Safety notes for the user
10
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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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.
WARNING
This product contains chemicals known to the state of California to cause
cancer, birth defects or other reproductive harm.

Operating controls and functional elements
12
4. Operating controls and functional elements
Front view Rear view
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 OK key (store)
4 LED temperature display, menu indication
5 Control indicator –Heating
6 Control indicator – Cooling
7 Control indicator – Alarm
8
°C
40
80
160
120
0
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
11
15
A
M
P
Mains fuses: Safety cutout 15 A

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5. Preparations
5.1. Installation
Caution:
Securely fix the immersion circulator. The heater may not be in contact with the
wall of the bath tank. Keep a distance of at least 15 mm.
Units not adequately fixed may drop into the bath tank.
Danger of electric shock!
First pull out the power plug to disconnect the unit from the power supply net.
Then take the immersion circulator out of the bath tank.
Make a service technician check the instrument before it is used again.
•Place the unit on an even surface on a pad made of non-
flammable material.
•The heating immersion circulator is mounted using a bath
attachment clamp (21) designed for bath wall thicknesses
up to 26 mm.
21
22
•Use the two sleeves (22) supplied with the unit to reduce
the immersion depth from 165 mm to 145 mm (see
drawing).
•For use with glass vessels a stand attachment with rod is
available as optional accessory.
(order no. 8 970 022)

Preparations
14
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
soft/decalcified water 5 °C to 80 °C
See website for list of recommended bath fluids.
ATTENTION: The maximum permissible viscosity is 30 mm2/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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5.3. 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.
The circulator is used for temperature application to external,
closed systems (loop circuit).
5.3.1. Pump set
Accessories
23
24b
24a
21
Order No. Description
8 970 140 Pump set
Mounting the pump set:
•Remove the bath attachment clamp (21).
•Screw the pump set to the circulator, and then fix the bath
attachment clamp to the pump set.
•Slide the short piece of tubing supplied with the pump set
onto the short pump nozzle and the pump connector (23).
•Thus the total immersion depth is reduced to 145 mm.
•Adjusting the pump for external bath circulation see
example D page 16.
Connecting an external system:
•Unscrew the collar nuts from the pump connector (24a).
•Slide the tubing onto the pump connectors for feed and
return flow (24a, 24b). Secure the tubing with tubing
clamps.
5.3.2. 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. -50 °C to 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
*) Adapter for metal tubing M10x1 on M16x1 Order No. 8 970 444

Preparations
16
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.
5.4. Adjusting the pump flow
1
2
The pump flow is pre-adjusted in the factory and can be
modified to suit user requirements.
•Using a screwdriver turn the screw (1) anti-clockwise by 360
°.
•Using flat pliers turn the marking of the slide (2) to the
desired position.
•Tighten the screw.
Examples:
extern 80 %
intern 100 %
intern 20 %
A
B
D
C
Internal applications in the bath
A 100 % internal bath circulation (for large bath tanks)
B Reduced internal bath circulation
(for smooth surface of bath fluid)
External/internal applications
C 40 % external discharge,
60 % internal circulation
(for large bath tanks)
D 80 % external discharge,
20 % internal circulation
(for small bath tanks)

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5.5. 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.
25b
21
25a
For applications near the ambient temperature, the
cooling coil (order no. 8 970 105) must be connected to
the water mains.
Mounting the cooling coil:
•Remove the bath attachment clamp (21).
•Screw the cooling coil to the circulator, and then fix
the bath attachment clamp to the cooling coil.
•Thus the total immersion depth is reduced to
145 mm.
•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).
LA specific water flow rate of 45 ml/minute is sufficient
to compensate for the characteristic temperature.
LFor applications near ambient temperature
(20 °C), the cooling water temperature should at
least be 5 °C below the working temperature.

Operating procedures
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.
6.2. Switching on / Start - Stop
•Switching on:
Turn the unit on with the mains power switch. (1).
LThe 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 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.

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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.
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.
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.
Please make sure that all safety devices of the unit have been set properly.
6.4. Setting the temperatures
Factory setting: 25°C
LSetting 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.

Operating procedures
20
6.5. ATC - Absolute Temperature Calibration
Working temperature
range refer to page 7
40 80
160
120
0
•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.
48.87
°C
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:
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
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.
LNotice:
If the determined value is bigger than the tolerance limit of
±5 °C, the value is ignored for the input!
Error message: -Err