Julabo HT60-M2 User manual

19533727-V1.docx Print date: 13.01.14
Operating Manual
High Temperature Circulator
HT60-M2 HT60-M3
C.U.-cooling unit
1.953.3727-V1 us 01/14
Forte HT with cooling unit
Version: V 4.01-J
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 and ISO 14001.Certificate
Registration No. 01 100044846
Unpacking and inspecting
Unpack the instrument 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

HT60-M2 / HT60-M3
3
TABLE OF CONTENTS
OPERATING MANUAL ....................................................................................................................5
1. INTENDED USE.......................................................................................................................5
1.1. Description ...................................................................................................................5
2. OPERATOR RESPONSIBILITY – SAFETY INSTRUCTIONS....................................................6
2.1. Disposal .......................................................................................................................7
2.2. Technical specifications................................................................................................8
2.3. Cooling water connection............................................................................................11
3. OPERATING CONTROLS AND FUNCTIONAL ELEMENTS...................................................12
M2 or M3 – control electronic ..................................................................................................12
HT60 High Temperature Circulator with C.U.-cooling unit (option) ...........................................15
4. SAFETY NOTES FOR THE USER..........................................................................................17
4.1. Explanation of safety notes.........................................................................................17
4.2. Explanation of other notes ..........................................................................................17
4.3. Safety instructions ......................................................................................................17
5. PREPARATIONS....................................................................................................................20
5.1. Setup..........................................................................................................................20
5.2. Installation..................................................................................................................21
5.3. Bath fluids ..................................................................................................................23
5.4. Tubing........................................................................................................................24
5.5. Power connection.......................................................................................................25
5.6. Filling / draining ..........................................................................................................25
5.7. Degasifying.................................................................................................................27
5.8. Countercooling ...........................................................................................................29
6. OPERATING PROCEDURES.................................................................................................30
6.1. Switching on / Selecting the language.........................................................................30
7. MANUAL OPERATION...........................................................................................................31
7.1. Start - Stop.................................................................................................................31
7.2. Setting the temperatures.............................................................................................31
7.3. Warning functions.......................................................................................................32
7.4. Setting the safety temperature (with shutdown function)..............................................33
7.5. Internal / external control ............................................................................................34
8. MENU FUNCTIONS................................................................................................................35
8.1. Configuration..............................................................................................................36
8.2. Control parameters.....................................................................................................39
8.3. Start of a profile..........................................................................................................42
8.3.1. Interrupting a profile .................................................................................................44
8.4. Integrated programmer...............................................................................................45
8.5. Analog inputs/outputs .................................................................................................48
8.6. Limits..........................................................................................................................51
8.7. Interface.....................................................................................................................52
8.8. Sensors......................................................................................................................52

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9. TROUBLESHOOTING GUIDE / ERROR MESSAGES............................................................54
10. ELECTRICAL CONNECTIONS...............................................................................................56
11. REMOTE CONTROL..............................................................................................................58
11.1. Setup for remote control .............................................................................................58
11.2. Communication with a PC or a superordinated data system........................................59
11.3. List of commands........................................................................................................60
11.4. Status messages / error messages.............................................................................63
12. CLEANING / REPAIRING THE UNIT ......................................................................................65
13. WARRANTY PROVISIONS.....................................................................................................66

HT60-M2 / HT60-M3
5
Operating manual
1. Intended use
The High Temperature Circulators HT60-M2 and HT60-M3 are to be employed especially for closed tempering
circuits in the laboratory, the technical institution or the production, like e.g. for distillation plants, reaction vessels,
autoclaves, injection moulding tools.
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 structure of the High Temperature Circulator HT60 is sub-divided in three zones:
•The cold zone (on top) with the electronics for controlling and monitoring, the temperature control and the
pump motor.
•The cooling zone with the cooling coil, the float for the level indication, a temperature sensor for monitoring
the temperature, the connection for inert-gas, the connection for the expansion vessel as well as an overflow
nozzle. At this place the temperature monitoring is independant from the other safety devices.
•The heating zone (down) with the heating element, the pump, the temperature sensors and the flow nozzle
The C.U.-cooling unit can be installed firmly and fulfills two tasks.
•The temperature of the tempering liquid in the cooling zone is supervised. If it is necessary the cooling water
is led through the integrated cooling coil in order to reduce the temperature (without C.U.-cooling unit the
cooling coil can be connected directly to the cooling water).
•With a separate cooling circuit through the C.U.-cooling unit a rapid cooling of the tempering liquid becomes
possible.
The M2 or M3 control electronics is connected to the HT60-circulator via a control cable.
•The local operation of the control electronics M2 / M3 is effected via a splash-water protected keypad. The
Microprocessor technology allows to set three different temperature values, to store and to indicate them via
the digital display LCD – the working temperature and the values for the excess and lower temperature
warning functions.
•With the integrated programmer the instructions for setpoint and time for six different temperature profiles
can be stored and called in.
•Via an analog interface REG+E-PROG an analog programmer can be connected for the setpoint.
•At the same time this interface is provided with three analog outputs for the recorder. For the best resolution
the output settings can be adjusted via the menu delete surface - should just be Menu.
The remote control via the digital RS232/RS485 interface according to NAMUR allows the most modern
process technology without additional interface.
•The excess temperature protection is a safety equipment which does not depend on the control circle. Its
safety value is shown and can be adjusted by the MULTI-DISPLAY (LED).
•The level of liquid is acquired in the cooling zone, indicated to the control electronics via the control cable.
There they are made visible by an 8-grade level indication.

Operator responsibility – Safety instructions
6
2. Operator responsibility – Safety instructions
The products of JULABO ensure safe operation when installed, operated, and maintained according to common
safety regulations. This section explains the potential dangers that may arise when operating the circulator and
also specifies the most important safety precautions to preclude these dangers as far as possible.
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.
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:
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 the 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 configure, install, maintain, or repair the circulator.
Persons who operate the circulator must be trained in the particular tasks by qualified personnel. The
summarized user guidance (short manual) and the specification table with information on individual parameters
are sufficient for this.
Use
The bath can be filled with flammable materials. Fire hazard!
There might be chemical dangers depending on the bath medium used.
Observe all warnings for the used materials (bath fluids) and the respective instructions (safety data sheets).

HT60-M2 / HT60-M3
7
Insufficient ventilation may result in the formation of explosive mixtures. Only use the unit in well ventilated
areas.
Only use recommended materials (bath fluids). Only use non-acid 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. 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 corresponding safety instructions. 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, follow the instructions in the material safety data sheets.

Operator responsibility – Safety instructions
8
2.2. Technical specifications
HT60-M2 HT60-M2 & C.U.
Working temperature range
°C
70 ... 400 40 … 400
Temperature stability external
°C
±0,01 ... ±0.1
Display accuracy
%
±0.5 ±1Digit
Temperature selection
digital
via keypad
indication on LCD DIALOG-DISPLAY (°C/°F)
remote control via PC
indication on monitor
Temperature indication
Multi-Display (LED)
DIALOG-Display (LCD)
Resolution
°C
0.01
Absolute Temperature Calibration
(ATC 1)
°C
±9.99
(ATC 2)
°C
±9.99
Temperature control
ICC - Intelligent Cascade Control,
self-optimizing
Cascade, parameter can be called-in and modified
Heater wattage (at 3x400 V)
kW
7.0
C.U.-cooling unit:
Temperature <IntAct>
Cooling capacity
at 2 l/min flow of cooling water
°C
kW ----- 350 250 150 75
----- 12 8 4 1
Pressure pump:
Max. pressure max. at 0 liters
bar
0.8 … 1.2
Flow rate max. at 0 bar
l/min
14 … 18
Electrical connections:
See page 10
Filling volume
liter
2
Overall dimensions (WxDxH) M2 / M3
Cm
25x25x18 25x25x18
Overall dimensions (WxDxH) HT60 Cm 23x23x58 43x23x58
Weight
kg
29 37
Ambient temperature
°C
5 ... 40
Mains power connection
400V/3PNPE/50Hz
V / Hz 365-440V/3PNPE/50Hz & 207-253V/50-60Hz
Current draw
A
10.5 (at 400 V) 10,5 (400V) & 1 (230V)
All measurements have been carried out at:
rated voltage and frequency ambient temperature: 20 °C
Technical changes without prior notification reserved.

HT60-M2 / HT60-M3
9
HT60-M3 HT60-M3 & C.U.
Working temperature range
°C
70 ... 400 40 … 400
Temperature stability external
°C
±0,01 ... ±0.1
Display accuracy
%
±0.5 ±1Digit
Temperature selection
digital
via keypad
indication on LCD DIALOG-DISPLAY (°C/°F)
remote control via PC
indication on monitor
Temperature indication
Multi-Display (LED)
DIALOG-Display (LCD)
Resolution
°C
0.01
Absolute Temperature Calibration
(ATC 1)
°C
±9.99
(ATC 2)
°C
±9.99
Temperature control
ICC - Intelligent Cascade Control,
self-optimizing
Cascade, parameter can be called-in and modified
Heater wattage (at 3x400 V)
kW
6.0
C.U.-cooling unit:
Temperature <IntAct>
Cooling capacity
at 2 l/min flow of cooling water
°C
kW ----- 350 250 150 75
----- 12 8 4 1
Pressure pump:
Max. pressure max. at 0 liters
bar
0.8 … 1.2
Flow rate max. at 0 bar
l/min
14 … 18
Electrical connections:
See page 10
Filling volume
liter
2
Overall dimensions (WxDxH) M2 / M3
Cm
25x25x18 25x25x18
Overall dimensions (WxDxH) HT60 Cm 23x23x58 43x23x58
Weight
kg
29 37
Ambient temperature
°C
5 ... 40
Mains power connection
208/3PPE/60Hz
V / Hz 180-228V/3PPE/60Hz &207-253V/50-60Hz
Current draw
A
18 (at 208 V) 18 (208V) & 1 (230V)
All measurements have been carried out at:
rated voltage and frequency ambient temperature: 20 °C
Technical changes without prior notification reserved.

Operator responsibility – Safety instructions
10
Electrical connections:
Computer interface RS232 or RS485 or Profi
Programmer input 0 - 10 V / 0 - 20 mA
Temperatur recorder outputs Channel 1 / 2 0 - 10 V /
Channel 3 0 - 20 mA / 4 - 20 mA
Stand-by input
External alarm device Switching capacity max. 30 W / 40 VA
Switching voltage max. 125 V∼/−
Switching current max. 1 A
External measurement and controlsensor Pt100, 4-lead technique
Safety installations according to IEC 61010-2-010:
Excess temperature protection adjustable from 0 °C to 420 °C
Low liquid level protection float switch
Liquid level indication optical 8-graded
Rèpartition par classe selon DIN 12876-1 Classe III FL
Supplementary safety installations
High temperature warning function optical + audible (in intervals)
Low temperature warning function optical + audible (in intervals)
Supervision of the working sensor plausibility control
Reciprocal sensor monitoring between
working and safety sensors difference >100 °C
Alarm indication optical + audible (permanent)
Environmental conditions according to IEC 61 010-1:
•Use only indoor.
•Altitude up to 2000 m - normal zero.
•Ambient temperature: see Technical specifications
•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.
•Overvoltage category II
•Pollution degree 2
Caution:
The unit is not for use in explosive environment
Protection class according to IEC 60 529: IP21
The unit corresponds to Class I
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).

HT60-M2 / HT60-M3
11
2.3. Cooling water connection
Cooling water pressure (IN / OUT ) max. 4.5 bar
Difference pressure (IN - OUT ) 2.0 to 4.5 bar
Rate of flow typical 2 l/min
Cooling water temperature <20 °C
Notice:
Danger of corrosion of heat exchanger due to unsuitable quality of cooling water.
•Due to its high content of lime, hard water is not suitable for cooling and causes scale in
the heat exchanger.
•Ferrous water or water containing ferrous particles will cause formation of rust even in
heat exchangers made of stainless steel.
•Chlorinated water will cause pitting corrosion in heat exchangers made of stainless steel.
•Due to their corrosive characteristics, distilled water and deionized water are unsuitable
and will cause corrosion of the bath.
•Due to its corrosive characteristics, sea water is not suitable.
•Due to its microbiological (bacterial) components, which settle in the heat exchanger,
untreated and unpurified river water and water from cooling towers is unsuitable.
•Avoid particulate matter in cooling water.
•Avoid putrid water.
Recommended quality of cooling water:
pH
7.5 to 9.0
Sulfate [SO4 2- ]
< 100 ppm
Hydrocarbonate [HCO 3-]/sulfate [SO4 2-]
> 1 ppm
Hardness [Ca 2+, Mg 2+]/[HCO 3-]
> 0.5
°
dH
Alkalinity
60 ppm < [HCO 3-] < 300 ppm
Conductivity
< 500 μS/cm
Chloride (Cl -)
< 50 ppm
Phosphate (PO4 3-)
< 2 ppm
Ammonia (NH3)
< 0.5 ppm
Free chlorine
< 0.5 ppm
Trivalent iron ions (Fe 3+)
< 0.5 ppm
Manganese ions (Mn 2+) < 0.05 ppm
Carbon dioxide (CO2)
< 10 ppm
Hydrogen sulfide (H2S)
< 50 ppm
Content of oxygen
< 0.1 ppm
Algae growth
impermissible
Suspended solids
impermissible

Operating controls and functional elements
12
3. Operating controls and functional elements
M2 or M3 – control electronic
1
-
ESC
P
0
60
180
300
420
°C
1 Mains power switch, illuminated
2 Start / stop key
3 Working temperature T
4 Key for automatic filling and aeration
5 High temperature warning limit
6 Low temperature warning limit
7 Safety temperature
8
Adjustable excess temperature protection (safety temperature)
9 Control type: internal/external control

HT60-M2 / HT60-M3
13
10 MULTI-DISPLAY (LED) temperature indication
11 Display of internal/external actual value
/ /
Indicator lights:
Temperature indication - external actual value
Alarm / Cooling / Heating
12
DIALOG-DISPLAY (LCD) for indication of:
Line 1: Setpoint or or
Line 2: Internal or external actual value
Line 3: Heating power in %
Line 4: Control type: internal / external control
13 MENU key - for selecting the menu functions
14 Cursor keys - Select menu items
15 P-key Selecting parameters
16 Numeral keypad: numerals 0 to 9; minus / decimal point
17 Enter key 1) Store value / parameter
2) Next lower menu level
18 Escape key 1) Cancel entries
2) Return to a higher menu level
19
EXT
Socket for external measurement and control sensor Pt100
20 8-grade liquid level indication

Operating controls and functional elements
14
Rear view
1
8
916
16
A
M
P
16
A
M
P
16
A
M
P
16
A
M
P
16
A
M
P
16
A
M
P
4
A
M
P
4
A
M
P
HT60
REG+E-PROG STAND-BY ALARMSERIAL
MADE IN GERMANY
30 31 32 33
35
36
37
38
30 SERIAL Interface RS232/RS485
31
REG+E-PROG
Programmer input and temperature recorder output
32 STAND-BY Stand-by input (for external emergency switch-off)
33
ALARM
Alarm output (for external alarm signal)
35 Control exit Connector for control cable of circulator HT60
36
M2 – Mains circuit breakers (resettable): 3x Mains fuses 16 A,
or
M2 – 3x fuse holder with fein-wire fuses T16A, 5x20 mm
M3 – Mains circuit breakers (resettable): 6x Mains fuses 16 A,
37 Mains circuit breakers (resettable): Fuses 4 A, for C.U.-cooling unit
38 Mains power cable with plug
1
8
916
16
A
M
P
4
A
M
P

HT60-M2 / HT60-M3
15
HT60 High Temperature Circulator with C.U.-cooling unit (option)
Front view:
Cold zone
Cooling zone
Heating zone
HT60
CU
40
41
42
43
44
53
54
Rear view: 40
40
41
44
43 43a
45
46
47
48
55
56 56a
49
50
51
52
Presentation: Cooling unit divided from HT60

Operating controls and functional elements
16
40 Stand rod attachment with mouting screw; ∅12; M8
41 Connector for liquid level indicator or
second expansion vessel; M16x1 / ∠37°
42 Drain plug for bath liquid; M16x1
43/43a Expansion vessel / Connector for expansion vessel; M16x1
(When filling it serves as funnel)
44/45
Cooling water connectors at the HT60, M12 / ∠37°
OUT – outlet (44), IN – inlet (45)
•Connection for cooling water or
•Connection for clocked cooling water with magnetic valve or
•Connection for clocked cooling water out of the CU-unit
•
46/47
Cooling water connectors at the C.U.-cooling unit; ∅10
IN –inlet, OUT – outlet
48
Overflow connector ∅15,5 / G ¼ ″Internal thread
49 Inert gas connector ∅10; M8x1 Internal thread
50
Pump connector for external temperatur application
Return; M16x1
51
Pump connector for external temperatur application
Feed ; M16x1
52
Pump connector for C.U.-cooling unit - Return; M16x1
(Cooling circuit )
53
Pump connector for C.U.-cooling unit - Feed; M16x1
(Cooling circuit )
54 Drain plug for cooling water; M10x1
55 Control cable with 16-channel plug for
connection of the M2 or M3 control electronics
56
56a
56a
Control cable with 6-channel plug for connection of the C.U.-cooling unit
Control exit for C.U.-cooling unit
or
Control exit for magnetic valve (for clocked cooling water)

HT60-M2 / HT60-M3
17
4. Safety notes for the user
4.1. Explanation of safety notes
In addition to the safety warnings listed above, warnings are posted throughout the manual.
These warnings are designated by an exclamation mark inside an 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.
Warning:
Describes a possibly highly dangerous situation. If these instructions are not followed, serious
injury and danger to life could result.
Caution:
Describes a possibly dangerous situation. If this is not avoided, slight or minor injuries could
result. A warning of possible property damage may also be contained in the text.
Notice:
Describes a possibly harmful situation. If this is not avoided, the product or anything in its
surroundings can be damaged.
4.2. Explanation of other notes
Note!
Draws attention to something special.
Important!
Indicates usage tips and other useful information.
4.3. Safety instructions
Follow the safety recommendations to prevent damage to persons or property. Further, the
valid safety instructions for working places must be followed.
•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 freely accessible.
•Place the instrument on an even surface on a pad made of non-flammable 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.
•Set the safety temperature.
•Never operate the unit without bath fluid in the bath.
•Pay attention to the thermal expansion of bath oil during heating to avoid overflowing of
the fluid.
•Prevent water from penetrating into the hot bath oil.
•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).

Safety notes for the user
18
•Employ suitable connecting tubing.
•Avoid sharp bends in the tubing, and maintain a sufficient distance from surrounding walls.
•Make sure that the tubing is securely attached.
•Regularly check the tubing for material defects (e.g. for cracks).
•Never operate damaged or leaking equipment.
•Always turn off the unit and disconnect the mains cable from the power source before
performing any service or maintenance procedures, or before moving the unit.
•Always turn off the unit and disconnect the mains cable from the power source before
cleaning the unit.
•Transport the unit with care.
•Sudden jolts or drops may cause damages in the interior of the unit.
•Observe all warning labels.
•Never remove warning labels.
•Never operate equipment with damaged mains power cables.
•Repairs are to be carried out only by qualified service personnel.
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.
Caution:
The temperature controlling i.e. of fluids in a reactor constitutes normal temperature system
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:
When you have finished the application, it is recommended to keep on circulating the liquid in
the bath or the external system for some time. Simultaneously set the working temperature to
+20 °C to allow the temperature in the system to decrease slowly.
Thus fractional over-heating of the bath liquid is prevented.

HT60-M2 / HT60-M3
19
Notice:
Check the safety installations at least twice a year!
•Excess temperature protection according to IEC 61010-2-010
With a screw driver turn back the adjustable excess temperature protection until the shut-
down point (actual temperature).
•Low level protection
To check the function of the float of this unit it cannot be operated manually.
The 5-graded level display should therefore be observed whenver refilling.
If the bath liquid thickens or cracks, the instrument should be cleaned and checked by
qualified personnel.
Caution: Escape of vapors / gas
The necessity of degassing requires that a closed system is not entirely sealed. Especially at
increased working temperatures vapor / gas may escape.
Ensure sufficient ventilation at the place of installation!
WARNING
This product contains chemicals known to the state of California to cause cancer, birth defects
or other reproductive harm.

Preparations
20
5. Preparations
5.1. Setup
HT60
CU
-
ESC
P
M2
0
60
180
300
420
EXT
°C
High temperature circulator HT60 as well as
High temperature circulator HT60 with CU cooling
unit:
as a desktop unit
•Place the circulator on an even surface on a pad
made of non-flammable material.
as a stand-mounted unit
•Place the unit in an vertical position.
•A wall distance of at least 15 cm must be
maintained for ventilation, allowing internal heat to
be conducted away from the unit.
JULABO Order-No.
9790100 C.U. cooling unit
M2 or M3 remote control electronics:
•The unit should be set up at a dry location.
•Place the unit in an upright position and do not
obstruct the ventilation Ambient temperatures
above 40 °C result in a failure of the unit.
•Do not set up the unit in the immediate vicinity of
heat sources and do not expose to sun light.