Julabo F70-ME User manual

Operating Manual
ME
English
Ultra-Low Refrigerated
Circulators
F70-ME
F81-ME
FP89-ME
JULABO USA, Inc.
884 Marcon Boulevard
Allentown, PA 18109
Phone: [phone]
Fax: [phone]
info.us@ julabo.com
www.julabo.com
19530522-V3.doc 15.03.16

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 to the full extent for us to guarantee our full support
of your claim for protection against loss from concealed damage. The form required for filing such a
claim will be provided by the carrier
1.953.0522-V3 03/16 Printed in Germany Changes without prior notification reserved
Important: keep operating manual for future use
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TABLE OF CONTENTS
Operating manual......................................................................................................................... 5
1. Intended use.......................................................................................................................... 5
1.1. Description ........................................................................................................................ 5
2. Operator responsibility – Safety recommendations................................................................ 6
2.1. Disposal ............................................................................................................................ 7
2.2. Technical specifications .................................................................................................... 8
Operating instructions .................................................................................................................11
3. Safety notes for the user.......................................................................................................11
3.1. Explanation of safety notes ..............................................................................................11
3.2. Explanation of other notes................................................................................................11
3.3. Safety recommendations..................................................................................................12
4. Operating controls and functional elements ..........................................................................14
4.1. Circulator..........................................................................................................................14
4.2. Cooling Machine ..............................................................................................................16
5. Preparations .........................................................................................................................17
5.1. Installation........................................................................................................................17
5.2. Bath fluids ........................................................................................................................17
5.3. Temperature application to external systems ...................................................................18
5.3.1.Tubing .........................................................................................................................19
5.4. Filling/draining..................................................................................................................20
6. Operating procedures ...........................................................................................................21
6.1. Power connection.............................................................................................................21
6.2. Switching on / Start - Stop................................................................................................22
6.2.1.Switching on the circulator ...........................................................................................22
6.2.2.Switching on the Cooling Machine ...............................................................................22
7. Setting of temperatures ...........................................................................................23
7.1. Using the pre-settings in the menu .....................................................................23
7.2. Direct setting of temperatures ..........................................................................................24
8. Safety installations, warning functions.....................................................................25
8.1. Excess temperature protection.........................................................................................25
8.1.1.Early warning system, low level protection...................................................................26
8.2. Switch-over from warning to shutdown function................................................................27
8.3. Over and Sub temperature warning function ....................................................................28
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9. Menu functions........................................................................................................29
9.1. MENU PROGRAM – START ...........................................................................................30
9.2. MENU PROGRAM – creation, administration...................................................................32
9.3. MENU PUMP – Setting of pump pressure........................................................................34
9.4. MENU CONFIG – Configuration of unit............................................................................35
9.4.1.REMOTE .....................................................................................................................36
9.4.2.AUTOSTART...............................................................................................................36
9.4.3.OFF-MODE .................................................................................................................37
9.4.4.Setting of clock and date .............................................................................................37
9.4.5.RESET – Factory settings ...........................................................................................37
9.5. MENU CONTROL – Control characteristics and parameters ...........................................38
9.5.1.CONTROL – Control INTERNAL / EXTERNAL............................................................39
9.5.2.Dynamic internal..........................................................................................................40
9.5.3.Control parameters – XPU-, XP-, TN-, TV- EXTERNAL...............................................40
9.5.4.Control parameters– XP-, TN-, TV- INTERNAL ...........................................................41
9.6. MENU SERIAL - BAUDRATE, HANDSHAKE, PARITY....................................................42
9.7. MENU ATC - Absolut Temperature Calibration ................................................................43
9.7.1.ATC SENSOR - INTERNAL / EXTERNAL ...................................................................45
9.7.2.ATC STATUS - YES / NO............................................................................................45
9.7.3.CALIBRATION TYPE: 1 -/ 2 -/ 3 POINT ......................................................................
46
9.7.4.Example: 3-point calibration for internal control ..........................................................47
9.8. MENU LIMITS..................................................................................................................49
9.8.1.Limits for internal control..............................................................................................50
9.8.2.Limits for external control.............................................................................................50
10. Troubleshooting guide / error messages...............................................................................52
11. Electrical connections ...........................................................................................................55
12. Remote control .....................................................................................................................56
12.1. Setup for remote control...................................................................................................56
12.2. Communication with a PC or a superordinated data system ............................................57
12.3. List of commands.............................................................................................................58
12.4. Status messages .............................................................................................................60
12.5. Error messages................................................................................................................60
13. JULABO Service – Online remote diagnosis.........................................................................62
14. Cleaning / repairing the unit ..................................................................................................63
15. WARRANTY PROVISIONS ..................................................................................................64
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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
1x10
PID3
ATC3
RS232
Pt100
PUMP
SMART
The circulators are operated via the splash-proof keypad. The microprocessor
technology allows different values to be set, stored, and displayed on the VFD
COMFORT-DISPLAY. Three menu keys facilitate the adjustment of setpoints,
warning and safety functions, and menu functions.
Temperature- and time-dependent processes can be stored and executed using
the integrated programmer.
The adjustable PID cascade temperature control automatically adjusts the heat
supply to the thermal requirements of the bath.
Absolute Temperature Calibration (ATC3) provides high temperature stability at all
points in the bath. With the 3-point calibration, an offset is adjusted at three
temperatures to ensure an accurate temperature pattern at the selected spot in the
bath over the entire temperature range.
Electrical connections:
RS232 interface for modern process technology without an additional interface.
Connection for external Pt100 sensor for external temperature measurement and
control.
Alarm output for external alarm message or control of JULABO refrigerating baths
or solenoid valve (cooling water).
The excess temperature protection according to IEC 61010-2-010 is a safety
device independent from the control circuit. Its safety value can be displayed and
adjusted on the VFD COMFORT-DISPLAY.
The early warning system for low level signals that bath fluid needs to be refilled
before the low level protection according to IEC 61010-2-010 triggers a safety
shutdown of the main functional elements.
Intelligent pump system: the pump capacity (electronically adjustable via the motor
speed) can be adapted to different conditions for internal and external temperature-
control applications.
5

Operator responsibility – Safety recommendations
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.
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.us@ 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.
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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 respective safety recommendations. Also observe the pin assignment of
plugs and technical specifications of the products.
2.1. Disposal
The circulator contains a back-up battery that supplies voltage to memory chips when the unit is
switched off. Do not dispose of the battery with household waste!
Depending on battery regulations in your country, you might be obliged to give back used or defect
batteries to gathering places.
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.
These units contains refrigerants– at this time considered not to have any negative effects on the
ozone layer. However, during the long operating period of the unit, disposal prescriptions may change.
So only qualified personnel should take care of disposal.
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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Operator responsibility – Safety recommendations
2.2. Technical specifications
F70-ME
Working temperature range °C -70 ... 100
Temperature stability °C ±0.02
Cooling capacity
Medium: ethanol
°C
kW
[phone]
0.34 0.22 0.17 0.13 0.04
Cooling compressor 2-stage
Refrigerant R-404A + R-23
Overall dimensions (WxDxH) cm 42x54x71
Bath opening (WxL) cm 12x12
Bath depth cm 13
Filling volume liters 3.5 ... 4.5
Weight kg 63
Mains power connection V/Hz 230 / 50
Current draw (at 230 V) A 14
F81-ME
Working temperature range °C -81 ... 100
Temperature stability °C ±0.02
Cooling capacity
Medium: ethanol
°C
kW
[phone]
0.45 0.38 0.36 0.32 0.27 0.070
Cooling compressor 2-stage
Refrigerant R-404A + R-23
Overall dimensions (WxDxH) cm 50x58x88
Bath opening (WxL) cm 12x12
Bath depth cm 13
Filling volume liters 5 ... 6.5
Weight kg 86
Mains power connection V/Hz 230 / 50/60
Current draw (at 230 V) A 16
All measurements have been carried out at:
rated voltage and frequency, ambient temperature: 20 °C
Technical changes without prior notification reserved.
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FP89-ME
Working temperature range °C -90 ... 100
Temperature stability °C ±0.02
Cooling capacity
Medium: ethanol
°C
kW
[phone]
1.0 0.92 0.88 0.75 0.58 0.2
Cooling compressor 2-stage
Refrigerant R-404A + R-508b
Overall dimensions (WxDxH) cm 55x61x90
Bath opening (WxL) cm 13x15
Bath depth cm 16
Filling volume liters 5.5 ... 8
Weight kg 133
Mains power connection V/Hz 230 / 50
Current draw (at 230 V) A 16
Mains power connection V/Hz 230 / 60
Current draw (at 230 V) A 16
All measurements have been carried out at:
rated voltage and frequency, ambient temperature: 20 °C
Technical changes without prior notification reserved.
ME
Temperature selection
digital
via keypad
indication on VFD COMFORT-Display
remote control via personal computer
indication on monitor
Temperature indication
VFD COMFORT-DISPLAY
Resolution
°C
0.01
Absolute Temperature Calibration INT/EXT
°C
±3 / ±9
Temperature control
PID3 cascade temperatur control
Heater wattage (at 230 V)
kW
2,0
Heater wattage (at 115 V)
kW
1,0
Electronically adj. pump capacity
stages
1 ... 4
Flow rate at 0 bar
l/min
11 ... 16
Pressure max. at 0 liter
bar
0.22 ... 0.45
Electrical connections:
External alarm device
Vdc/mA
24-0 / max. 25
Computer interface
RS232
External temperature sensor
Pt100
Ambient temperature
°C
5 ... 40
9

Operator responsibility – Safety recommendations
Safety installations according to IEC 61010-2-010:
Excess temperature protection adjustable from 0 °C ... 230 °C
Low liquid level protection float switch
Classification according to DIN 12876-1 class III
Supplementary safety installations
Early warning system for low level float switch
High temperature warning function optical + audible (in intervals)
Low temperature warning function optical + audible (in intervals)
Supervision of working sensor plausibility control
Reciprocal sensor monitoring between
working and safety sensors difference >35 K
Alarm message optical + audible (permanent)
Warning message optical + audible (in intervals)
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.
This icon is used in the operating instructions to indicate flashing values or parameters
which have to be set or confirmed.
11

Safety notes for the user
3.3. Safety recommendations
Follow the safety instructions to avoid personal injury and property damage. Also, the
valid safety instructions for workplaces 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 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 excess temperature safety installation at least 25 °C below the fire point of
the bath fluid.
•Observe the limited working temperature range when using plastic bath tanks.
•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 entering the hot bath oil.
•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).
•Use 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 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 tank and the pump connections may become extremely hot
during continuous operation. Therefore, exercise particular caution when touching
these parts.
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Caution:
The temperature controlling i.e. of fluids in a reactor constitutes normal circulator
practice.
We do not know which substances are contained within these vessels.
Many substances are:
•inflammable, easily ignited or explosive
•hazardous to health
•environmentally unsafe
i.e.: dangerous
The user alone is responsible for the handling of these substances!
The following questions shall help to recognize possible dangers and to reduce the
risks to a minimum.
•Are all tubes and electrical cables connected and installed?
Note:
sharp edges, hot surfaces in operation, moving machine parts, etc.
•Do dangerous steams or gases arise when heating?
Is an exhaust needed when working?
•What to do when a dangerous substance was spilled on or in the unit?
Before starting to work, obtain information concerning the substance and
determine the method of decontamination.
Notice: Check the safety installations at least twice a year!
•Excess temperature protection according to IEC 61010-2-010.
With a screwdriver turn back the adjustable excess temperature protection until the
shut-down point (actual temperature).
•Low level protection according to IEC 61010-2-010.
To check the function of the float, it can be manually lowered with a screwdriver for
example.
WARNING
This product contains chemicals known to the state of California to cause cancer, birth
defects or other reproductive harm.
13

Operating controls and functional elements
4. Operating controls and functional elements
4.1. Circulator
Front view Rear view
1
Mains power switch, illuminated
Navigation keys
2
1. Key: >OK< Start / Stop (pump / heater )
2. >OK< in the menu Menu item / select submenu for setting
Save set value
Save selected parameter
A beep signals the end of setting
After the actions Start, Stop and change from VFD Display to standard
display the key is locked for a short time.
The above graph “front side” shows an example for standard display.
3
1. Key: >Return< Stop (pump / heater )
2. >Return< in the menu one menu level down
Correction function for parameters or values (prior to OK)
immediately back to standard display
- icon for „keep key pressed down“.
4
1. Key: >Up / Down <temperature – increase/decrease setpoint
Push key quickly for single steps,
Keep key pressed for fast change.
2. >Up/Down< in the menu selection of menu items / parameters
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Menu keys
5 Key: start the menu > warning and safety values<
6 Key: start the menu >temperature setpoints<
7 Key: display of MENU structure
10
VFD COMFORT-DISPLAY
Header: Control indicators see sections 11 and 12
Line 1: Actual value internal or external
The display is depending on the selected control mode in the
menu > Control < (internal or external).
Line 2: Working temp. setpoint, constantly S xxx.xx
Line 3: Actual value (E = external or I = internal)
Alternating with the display in line 1
11 Control indicators in the header:
Heating / Cooling / Alarm /
R
emote control
12 Control indicators in the header:
Temperature indication Internal or External actual value
Temperature indication in °C (°F not possible on this unit)
13 Display of set pump pressure stage
Four stages, can be set via the key , under >MENU - PUMP<.
14
Adjustable excess temperature protection according to IEC 61010-2-010
15
Socket: control cable of JULABO refrigerated circulator
or output for alarm messages
16
RS232
Interface RS232: remote control via personal computer
17
Pt100
Socket for external measurement and control sensor
or external setpoint programming
18 15
A
M
P
Mains circuit breakers (resettable) 15 A
20 Mains power cable with plug
15

Operating controls and functional elements
4.2. Cooling Machine
Front view Rear view
1b
Mains power switch, illuminated for cooling machine
15a
15b
Socket: control cable of JULABO refrigerated circulator
20a
20b
Mains power cable with plug for circulator
Mains power cable with plug cooling machine
21 F70, F81 Built-in mains outlet for connection of circulator
(not on FP89)
22 Drain tap with drain port
24a
24b
Pump connector: feed
Pump connector: return
25 Venting grid, removable
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5. Preparations
5.1. Installation
Place the unit on an even surface on a base made of
nonflammable material.
The place of installation should be large enough and provide
sufficient air ventilation to ensure the room does not warm up
excessively because of the heat the instrument rejects to the
environment. (Max. permissible ambient temperature: 40 °C).
For a fault (leakage) in the refrigeration system, the standard
EN 378 prescribes a certain room space to be available for
each kg of refrigerant.
The refrigerant quantity is specified on the type plate.
> For 0.52 kg of refrigerant R-404A, 1 m3 of space is required.
> For 0.68 kg of refrigerant R-23, 1 m3 of space is required.
> For 0.2 kg of refrigerant R-508b, 1 m3 of space is required.
Keep at least 20 cm of open space at the front and rear venting
grids.
Do not install the unit in the immediate vicinity of heat sources
and do not expose it to sunlight
Before operating the unit after transport, wait about one hour
after installation. This will allow any oil that has accumulated
laterally during transport to flow back down, thus ensuring that
the compressor can develop its maximum capacity.
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
mixture water/glycol, mixture 1:1
-20°C to 50°C
See website for list of recommended bath fluids.
ATTENTION: The maximum permissible viscosity is 50 mm2/s.
17

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 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!
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.

feed return
The circulator is used for temperature application to external,
closed systems (loop circuit) with simultaneous temperature
application in the circulator bath.
Connecting the external system
•Unscrew the collar nuts from the pump connector (24a).
•Slide the tubing onto the pump connector for feed (24a) and
return flow (24b) and secure with hose clamps.
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5.3.1. Tubing
Recommended tubing:
Order No. Length
Temperature range
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
8 970 480
2 tubing clamps. size 1, tubing 8 mm inner dia.
8 970 481
2 tubing clamps. size 2, tubing 10 or 12 mm inner dia.
8 930 209 0.5 m
8 930 210 1.0 m
8 930 211 1.5 m
8 930 214 3.0 m
Metal tubing, triple insulated,
M16x1 *
-100 °C to +350 °C
8 930 220 0.5 m
8 930 221 1.0 m
8 930 222 1.5 m
8 930 223 3.0 m
Metal tubing, insulated, M16x1 *
-50 °C to +200 °C
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.
19

Preparations
5.4. 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 or cold!
Check the temperature of the bath fluid prior to draining (by switching the unit on
for a short moment, for example).
Store and dispose of the used bath fluid according to environmental protection
laws.
Filling
Make sure that no bath fluid enters the interior of the circulator during
filling.
Recommended maximum filling level with water as bath fluid:
30 mm below the tank rim
Recommended maximum filling level with bath oils:
40 mm below the tank rim
After filling, immerse the samples in the bath, or place the lid on
the bath if the opening is not to be used.
The ME circulator has an early warning system for low level that
may be triggered when changing samples in the bath.
Draining:
•The drain tap is located behind the venting grid on the front of
the unit, which can be taken off by removing 4 screws.
•Slide a short piece of tube onto the drain connection and hold it
into a container.
•Loosen the drain screw a few turns and drain the unit
completely.
•Tighten the drain tap.
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