Julabo MV-4 User manual

19511402.doc
Circulators
MV-4/ MV-6/ MV-12/ MV-26
MW-4/ MW-6/ MW-12/ MW-26
MW-Z
!
1.951.1402BE2 01/03

Operating controls and functional elements
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
principles of operating and possibilities of our circulators. For optimum utilization
of all functions, we recommend that you thoroughly study this manual prior to
beginning operation.
Safety Warnings
Take care your unit is operated only by qualified persons.
Make sure you read and understand all instructions and safety precautions listed in
this manual before installing or operating your unit. If you have any questions
concerning the operation of your unit or the information in this manual, contact
JULABO.
Performance of installation, operation, or maintenance procedures other than those
described in this manual may result in a hazardous situation and may void the
manufacturer's warranty.
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 damaged or leaking equipment.
Never operate the unit without bath fluid in the bath.
Always turn off the unit and disconnect the mains cable from the power source
before performing any service or maintenance procedures, or before moving the
unit.
Always empty the bath before moving the unit.
Never operate equipment with damaged mains power cables.
Refer service and repairs to a qualified technician.
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. Read and follow
these important instructions. Failure to observe these instructions can
result in permanent damage to the unit, significant property damage,
personal injury or death.

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3
TABLE OF CONTENTS
1. .Operating controls and functional elements....................................................... 4
2. .Quality Management System............................................................................... 6
3. .Unpacking and checking...................................................................................... 6
4. .Description ............................................................................................................ 6
5. .Preparations.......................................................................................................... 7
5.1. Installation.................................................................................................. 7
5.2. Bath liquids and tubing............................................................................. 7
5.3. Filling / draining......................................................................................... 8
5.4. Countercooling.......................................................................................... 9
5.5. Temperature application to external systems...................................... 10
5.6. Adjusting the pump flow.........................................................................12
6. .Operating procedures ........................................................................................ 13
6.1. Power connection...................................................................................13
6.2. Switching on / Start - Stop..................................................................... 13
6.3. Setting the temperatures .......................................................................15
6.4. Warning functions ...................................................................................16
6.5. Setting the safety temperature (with shutdown function) ....................17
7. .Troubleshooting guide / Error messages.........................................................18
8. .Safety recommendations ...................................................................................20
9. .ATC - Absolute Temperature Calibration.........................................................21
10. Configuration for counter-cooling ...............................................................22
11. Electrical connections..................................................................................23
12. Remote control.............................................................................................24
12.1. Setup for remote control........................................................................24
12.2. Communication with a PC or a superordinated data system............25
12.3. List of commands................................................................................... 26
12.4. Status messages....................................................................................26
12.5. Error messages......................................................................................27
13. Cleaning the unit...........................................................................................28
14. Maintenance .................................................................................................28
15. Technical specifications .............................................................................. 29
16. EC Declaration of Conformity..................................................................... 31
17. Warranty conditions .....................................................................................32

Operating controls and functional elements
4
1. Operating controls and functional elements
!
5
6
7
9
10
11
12
1
2
3
4
8
14
15
16
20a
13
20b
Rear view
20a MV Feed Return
20b MW Suction pump Pressure pump

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5
1 Mains power switch, illuminated
2 Start / stop key
3 Working temperature T1
4 Working temperature T2
5 High temperature warning limit
6 Low temperature warning limit
7 Safety temperature
8 Adjustable excess temperature protection
(safety temperature)
9 MULTI-DISPLAY (LED) temperature indication
10 Cursors left/right
11 Edit keys (increase/decrease setting)
12 Enter key (store)
Indicator light - Alarm
Indicator light - Cooling (not operational)
Indicator light - Heating
13 Connector: alarm output
14
1
5
69
RS232C interface
15 Mains fuses, fuse holders
16 Mains power cable with plug
20a Pump connectors on MV
20b Pump connectors on MW

Quality Management System
6
2. Quality Management System
The JULABO Quality Management System:
Development, production and distribution of temperature
application instruments for research and industries conform to
the requirements according to DIN EN ISO 9001:1994-08.
Certificate Registration No. QA 051004008.
3. Unpacking and checking
Unpack the circulator and accessories and check for damages incurred during
transit. These should be reported to the responsible carrier, railway, or postal
authority, and a request for a damage report should be made. 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.
4. Description
The JULABO circulators are suitable for temperature application to liquids in a
bath tank.
The main functional elements are the heater, circulation pump, and control
electronics. An electronic proportional temperature control (PID characteristic)
adapts the heat supplied to the thermal requirements of the bath.
Setting is rapid and simple using the keypad with its easy to learn symbols. Keypad
is splash-proof, easily cleaned and ergonomically designed.
The microprocessor technology allows four temperature values to be stored and
indicated on the MULTI-DISPLAY (LED): working temperatures T1 and T2, high
and low temperature warning limits.
The safety value for excess temperature protection, a safety installation
independent from the control circuit, is adjustable on the front and visible on the
MULTI-DISPLAY (LED).
The RS232C port permits modern process engineering without additional interface,
directly on-line, from the circulator to your application equipment.
The circulator conforms to the safety requirements specified by DIN 12 876
(safety class III), as well as DIN 58 966, and the guideline for first voltage range
EN 61010.

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7
5. Preparations
5.1. Installation
!
Heating circulators
Place the circulator in an upright position.
Bridge mounted circulator
Place the bath tank in an upright position.
Adjust the bridge to width of the bath tank and
place it on the bath tank.
Bridge is extendable from 310 mm to 660 mm.
5.2. Bath liquids and tubing
Operation with flammable bath liquids permitted.
Recommended bath liquids:
Bath liquids Temperature range Flash point fire point
Thermal M +50 °C ... 170 °C >275 °C >320 °C
Thermal H +50 °C ... 250 °C >280 °C >350 °C
deionized water 5 °C bis 80 °C
ATTENTION: The maximum permissible viscosity is 30 mm2x s-1.
No liability for use of other bath liquids!
Order No. Bath liquid
8 940 100
8 940 101
8 940 102
8 940 103
Thermal M
Thermal M
Thermal H
Thermal H
10 liters container
5 liters container
10 liters container
5 liters container

Preparations
8
Recommended tubing:
Temperature range
CR tubing
Viton tubing
-20 °C to +120 °C
-50 °C to +200 °C
5.3. Filling / draining
Filling
Take care that no liquid enters the interior of the
circulator.
•Recommended maximum filling level with water as
bath liquid: 25 mm below the tank rim
•Recommended maximum filling level with bath oils:
40 mm below the tank rim
ATTENTION: the volume of bath oils will increase due to
thermal expansion when the bath temperature rises.
Exercise CAUTION when emptying hot bath liquids!
Draining
•Press the mains switch to turn the circulator off.
•Place the heating circulator near the rim of the table.
Use a suitable vessel as recipient for the bath liquid.
•A drain plug is located on the front of the bath tank
that is unscrewed to drain the bath.
•Remove the bridge mounted circulator from the bath
tank.
•Empty the bath tank.
Store and dispose the used bath liquid according
to the laws for environmental protection.

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9
5.4. Countercooling
25a
25b
25b
25a
For applications near the ambient temperature, the
cooling coil must be connected to the water mains.
Using tubing, connect the cooling coil (25a) to the tap
water supply, and lead the tap water in a sink through
the return connector (25b).
A specific water flow rate of 130 ml/minute (MW) or
100 ml/minute (MV) is sufficient to compensate for the
characteristic temperature.
By installing the MVS controller (26) and a solenoid
valve (27), sudden temperature increases can be rapidly
reversed by tap water flowing through the built-in
cooling coil.
Low water consumption: For applications requiring
constant near-ambient temperature, tap water is only
used in small amounts. Configuration see page 22.
Order No. Description
9 790 000 MVS controller
8 980 700 Solenoid valve, 220 V
26
27
25b25a

Preparations
10
NOTE: Flow-through cooler
Order No. Description
9 655 825 FD200
The FD200 is suitable as cooling device for liquids
in closed circuits (loops).
This unit is integrated in the return flow circuit
from the external system connected to a circulator,
and continuously withdraws heat from the liquid.
5.5. Temperature application to external systems
Temperature application to external, closed systems.
The circulator is used for temperature application to external, closed systems (loop
circuit) with simultaneous temperature application in the circulator bath.
24a
24b
Connecting the external system:
•Unscrew the collar nut from the pump connector
(24a).
•Slide the tubing onto the pump connectors for feed
and return flow (24a, 24b).
24a
24b
Unscrew the M 16 x 1 collar nuts on the pump
connectors (pressure pump 24a, suction pump 24b)
with a 19 mm (3/4") wrench and remove the sealing
disks. Using the collar nuts, screw on the tubing
connection fittings delivered with the unit
(8 mm or 12 mm in diameter) and tighten firmly.
Push on the tubings, and secure with tube clamps.
Attach the tubings to the connectors of the external
closed system, e.g., an instrument with a pressure-
resistant temperature jacket or a temperature coil, and
fasten with tube clamps to prevent slipping.

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11
Temperature application to external, open systems
K
S
D
H
S = Suction pump connection
D = Pressure pump connection
K = Float
H = Height adjustment
MW circulators are equipped with both a pressure and
suction pump for external temperature application in
open systems.
Connections are to be made as described on page 10.
Differing flow rates of the pressure and suction pumps
should be compensated. To maintain a constant liquid
level, the JULABO "D+S" Level Adapter is
recommended for the external bath tank. The flow
rate of the pressure pump (24a) will be then regulated
by a built-in float device. The liquid level may be
changed by a height adjustment on the "D+S" Level
Adapter.
Order No. 8 970 410 "D+S" Level Adapter
Note: If the liquid levels in the circulator bath and the external system
are at different heights, overflowing must be prevented after the
power has been turned off. Close off both connection tubings with
standard pinchcocks or shut-off valves
Order No. Description
8 970 456 Shut-off valve (suitable up to +90 °C)
8 970 457 Shut-off valve (suitable up to +250 °C)
Fasten tubing to prevent slipping.

Preparations
12
5.6. 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:
Internal applications in the bath
A 100 % internal bath circulation
(for large bath tanks)
B Reduced internal bath circulation
(for smooth surface of bath liquid)
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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13
6. Operating procedures
6.1. Power connection
Connect the unit only to a grounded mains power socket!
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.
Deviations of ±10 % are permissible.
6.2. Switching on / Start - Stop
Switching on:
Turn on the mains power switch.
The unit performs a self-test. All segments of the 4-digit
MULTI-DISPLAY (LED) and all indicator lights will
illuminate.
Then the software version (example: n 1.2) appears.
The display "OFF" or "rOFF"indicates the unit is
ready to operate (standby mode).
The circulator enters the operating mode activated
before switching the circulator off:
keypad control mode (manual operation) or
remote control mode (operation via personal
computer).
Start:
Press the start/stop key.
- The MULTI-DISPLAY (LED) indicates the actual
bath temperature. (example: 21.0 °C)
- An illuminated indicator light in the "T1" or "T2"
key indicates the activated working temperature.
Stop:
Press the start/stop key.
The MULTI-DISPLAY (LED) indicates the message
"OFF".

Operating procedures
14
The unit also enters the safe operating state "OFF" or "r OFF after a
mains power interruptance. The temperature values entered via the
keypad remain in memory. With the circulator in keypad control
mode, press the start/stop key to restart operation.
With the circulator in remote control mode, the personal computer
must first resend the parameters set via the interface before the
circulator may be restarted.
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“ or „rOFF“, resp. on the MULTI-
DISPLAY (LED). A complete shutdown of the main functional elements such as
heater and circulation 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.
Automatic / non-automatic start mode
Activating/deactivating AUTOSTART
Keep depressed enter and the start/stop
key
and turn on the circulator with the mains
power switch.
For a short while the MULTI-DISPLAY indicates
the effective start mode:
AUTOSTART on.
AUTOSTART off.

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15
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. recommend-
ations.
Take care you fully observe the safety and warning functions of the
circulator.
6.3. Setting the temperatures
Setting the working temperature "T1":
Press the setpoint key .
The indicator light blinks and the value previously set
appears on the MULTI-DISPLAY (LED).
Use the cursor keys to move left or right
on the display until the numeral you wish to change is
blinking.
Use the increase/decrease arrows to
change the selected numeral (-, 0, 1, 2, 3, ... 9).
Press enter to store the selected value
(example: 37.0 °C).
The working temperature is maintained constant after a
short heat-up time (e. g. 37.0 °C).
Setting the working temperature "T2":
Press the setpoint key .
Same procedure
as with "T1"
(example: 25.0 °C).
Selecting the working temperature:
•Press the setpoint key or and then enter
.

Operating procedures
16
6.4. Warning functions
)) )) ))
More protection for your samples in the bath!
An audible signal sounds in intervals when the actual
temperature value exceeds one of the set limits
(patented).
Setting the high temperature limit:
Press the key .
The indicator light blinks and the value previously set
appears on the MULTI-DISPLAY (LED).
Use the cursor keys to move left or right
on the MULTI-DISPLAY (LED) until the numeral
you wish to change is blinking.
Use the edit keys to increase or decrease
the numeral value (-, 0, 1, 2, 3, ... 9).
Press enter to store the value
(example: 39.0 °C).
Setting the low temperature limit:
Press the key .
Follow the instructions
for
(example: 35.0 °C).
Note: The warning functions will only be triggered when the
actual bath temperature, after start from the „OFF“ or „rOFF“
mode, lies within the set limits for 3 seconds.

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17
6.5. Setting the safety temperature (with shutdown function)
!
+))))
(excess temperature protection / low liquid level
protection)
These safety installations are independent of the control
circuit. When the temperature of the bath liquid has
reached the safety temperature or the liquid level is
insufficient, a complete shutdown of the heater and
pump is effected.
The alarm is indicated by optical and audible signals
(continuous tone) and on the MULTI-DISPLAY (LED)
appears the error message "Error 01".
1. Excess temperature protection
•Press the key to indicate the safety temperature value
on the MULTI-DISPLAY and using a screwdriver
simultaneously turn the setting screw to the desired
value (example: 50 °C).
Setting range: 20 °C to 210 °C in 2 °C steps
Recommendation:
Set the safety temperature at 5 to 10 °C above the
working temperature setpoint.
Example: Setting the warning functions and
the safety temperature
t
°C
39
37
35
20
50
2. Low liquid level protection
•This device is triggered when the float reaches a fixed
minimum liquid level.
The excess temperature protection should be set at least 20 °C
below the fire point of the bath liquid used.
In the event of wrong setting there is a fire hazard!
We disclaim all liability for damage caused by wrong settings!

Troubleshooting guide / Error messages
18
7. Troubleshooting guide / Error messages
!
+
Whenever the microprocessor electronics registers a failure, a
complete shutdown of the heater and circulation pump is
performed. The alarm light " " illuminates and a continuous
signal tone sounds.
Cause Remedy
•The circulator is operated
without bath liquid, or the liquid
level is insufficient.
•Replenish the bath
tank with the bath
liquid.
•Tube breakage has occured
(insufficient filling level due to
excessive bath liquid pumped
out).
•Replace the tubing and
replenish the bath tank
with the bath liquid.
•The float is defect (e. g., because
damaged in transit).
•Repair by authorized
JULABO service
personnel.
•The safety temperature value lies
below the working temperature
setpoint.
•Set the safety
temperature to a higher
value.
•A heat reaction or sudden
temperature increase, e.g. caused
by an exothermic chemical
reaction or by the immersion of
preheated samples.
•Set the safety
temperature to a higher
value.
After eliminating the malfunction, press the mains power switch
off and on again to cancel the alarm state.
•The wires of the working temperature sensor are interrupted
or short-circuited.
•Defect of the working or safety temperature sensor.
The difference between the working temperature and safety
sensors is above 25 °C.

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19

other errors


After eliminating the malfunction, press the mains power switch
off and on again to cancel the alarm state.
If the unit cannot be returned to operation, contact an authorized
JULABO service station.
If the error message "Configuration Error" appears, contact an
authorized JULABO service station.
Disturbances that are not indicated.
Pump motor overload protection
•The pump motor is protected against overloading.
After a short cooling interval, the motor will
automatically start running.
Mains fuses
•The mains fuses on the rear of the unit may easily be
exchanged as shown on the left.
(Fine fuse T 10.0 A, dia. 5 x 20 mm)
Only use fine fuses with a nominal value as specified.

Safety recommendations
20
8. Safety recommendations
Follow the safety recommendations to prevent damage to persons
or property. Further, the valid safety instructions for working
places must be followed.
Connect the unit only to a grounded mains power socket!
Observe the flash point of the bath medium used.
The excess temperature protection should be set at least 20 °C
below the fire point.
Pay attention to the thermal expansion of bath oil during heating
to avoid overflowing of the liquid.
Prevent water from penetrating into the hot bath oil.
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.
Exercise caution when emptying hot bath liquids!
Observe the limited working temperature range when using plastic
bath tanks.
Employ suitable connecting tubing.
Make sure that the tubes are 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).
Before cleaning the unit, disconnect the power plug from the
mains socket.
Recommendation:
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.