English
Operating manual
Water Baths
TW2
TW8
TW12
TW20
1.951.6062-V2 06/13
JULABO GmbH
°C
77960 Seelbach / Germany
Tel. +49 (0) 7823 / 51-0
Fax +49 (0) 7823 / 24 91
info@julabo.de
www.julabo.de
19516062-V2.doc Version: 25.07.13
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 water baths. For optimum 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 checking
Unpack the water baths 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.
Printed in Germany Changes without prior notification reserved
Important: keep operating manual for future use
2
Water Baths
TABLE OF CONTENTS
Operating manual .................................................................................................................... 4
1. Intended use ................................................................................................................... 4
1.1. Description .................................................................................................................. 4
2. Operator responsibility – Safety recommendations ......................................................... 4
2.1. Disposal ...................................................................................................................... 6
2.2. EC Conformity ............................................................................................................ 7
2.3. Warranty conditions .................................................................................................... 7
2.4. Technical specifications .............................................................................................. 8
Operating instructions ........................................................................................................... 11
3. Operating controls and functional elements .................................................................. 11
4. Safety notes for the user ............................................................................................... 12
4.1. Explanation of safety notes ....................................................................................... 12
4.2. Explanation of other notes ........................................................................................ 12
5. Safety recommendations .............................................................................................. 13
6. Preparations .................................................................................................................. 14
6.1. Installation ................................................................................................................. 14
6.2. Bath fluids ................................................................................................................. 15
6.3. Filling / Draining ........................................................................................................ 16
6.4. Maintaining a constant water level / Counter cooling ................................................ 17
6.5. Accessoires .............................................................................................................. 18
7. Operating procedures ................................................................................................... 19
7.1. Power connection ..................................................................................................... 19
7.2. Switching on / Start - Stop ........................................................................................ 20
7.3. Setting the temperatures ........................................................................................... 20
8. Troubleshooting guide / Error messages ...................................................................... 21
9. Cleaning / repairing the unit .......................................................................................... 21
3
Operating manual
Operating manual
1. Intended use
JULABO water baths have been designed for temperature application to specific fluids in a
bath tank.
JULABO water baths are not conceived for direct temperature application to
food and luxury articles or pharmaceutical and medico-technical products.
Direct temperature application means: Unprotected contact of the object with
the bath medium (bath fluid).
1.1. Description
The water baths 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.
The water baths conforms to the relevant requirements specified by
PID1
European guidelines.
The models TW8, TW12, TW20 provide a drain screw and handles for easy
relocation.
2. Operator responsibility – Safety recommendations
The products of JULABO GmbH warrant a safe operation if installation, operation and
maintenance is carried out according to common safety regulations. This section informs you
about potential dangers that may arise from operating the circulator and also mentions the
most important safety precautions
The operator is responsible for the qualification of the personnel operating the units.
The operator should be constantly informed about the dangers involved with their job
activities as well as preventive actions.
Make sure all persons expected to carry out operation, installation and maintenance of
the unit read and understand the safety information and operating instructions.
4
Water Baths
When using hazardous materials, the circulator may only be operated by persons that are
absolutely familiar with these materials and the unit. 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:
Safety recommendations for the operator
You received a product conceived for industrial use. Nevertheless, avoid strikes to the
housing, vibrations, damages to the keypad foil (keys, display) or contamination.
Make sure the product is regularly checked for proper condition. Regularly check (at least
every 2 years) the proper condition of the mandatory, warning, prohibition and safety
labels.
Take care that the mains supply features a low impedance to avoid any negative affects
on the instrument being operated in 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 influence other units with components
susceptible to magnetic fields (e.g. a monitor). We recommend to keep a minimum
distance of 1 m.
JULABO GmbH
Eisenbahnstraße 45
77960 Seelbach / Germany
Tel. +49 (0) 7823 / 51-0 info@julabo.de
Fax +49 (0) 7823 / 24 91 www.julabo.de
Permissible ambient temperature: max. 40 °C, min. 5 °C.
Permissible relative air humidity: 50 % (40 °C).
Do not store in an aggressive atmosphere. Protect from contaminations.
Do not expose to sunlight.
Appropriate Operation
Only qualified personnel is authorized to perform configuration, installation, maintenance and
repairs of the water bath.
Routine operation can also be carried out by untrained personnel who should however be
instructed by trained personnel.
Use:
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.
JULABO water baths have been designed for temperature application to water in a bath tank.
The bath may not be filled with flammable materials. Fire hazard!
Only use non-acid and non corroding bath fluids.
5
Operator responsibility – Safety recommendations
When using hazardous materials or materials that could become hazardous, the operator
must affix the enclosed safety labels (1 + 2) to the front of the unit so they are highly visible:
1
2
or
2
Particular care and attention is necessary because of the wide operating range.
There are thermal dangers: Burn, scald, hot steam, hot parts and surfaces that can be
touched.
Warning label W00: Colors: yellow, black
Danger area. Attention! Observe instructions.
(operating manual, safety data sheet)
Mandatory label M018: Colors: blue, white
Carefully read the user information prior to beginning operation.
Scope: EU
Semi S1-0701 Table A1-2 #9
Carefully read the user information prior to beginning operation.
Scope: USA, NAFTA
Warning label W26: Colours: yellow, black
Hot surface warning.
(The label is put on by JULABO)
2.1. Disposal
Valid in EU countries
See the current official journal of the European Union – WEEE directive.
Directive of the European Parliament and of the Council on waste electrical
and electronic equipment (WEEE).
This directive requires electrical and electronic equipment marked with a
crossed-out trash can to be disposed of separately in an environmentally
friendly manner.
Contact an authorized waste management company in your country.
Disposal with household waste (unsorted waste) or similar collections of
municipal waste is not permitted!
6
2.2. EC Conformity
The products described in the operating instructions conform to the
requirements of the following European guidelines:
Low voltage regulations with respect to legal harmonization of the member
countries concerning electric devices for use within certain voltage limits.
EMC guideline with respect to legal harmonization of the member countries
concerning electromagnetic compatibility.
JULABO GmbH
Eisenbahnstr. 45
77960 Seelbach / Germany
Water Baths
2.3. Warranty conditions
JULABO GmbH warrants its products against defects in material or in workmanship, when
used under appropriate conditions and in accordance with appropriate operating instructions
for a period of ONE YEAR.
Extension of the warranty period – free of charge
With the ‘1PLUS warranty’ the user receives a free of charge extension to the warranty of up
to 24 months, limited to a maximum of 10 000 working hours.
To apply for this extended warranty the user must register the unit on the JULABO web site
www.julabo.de, indicating the serial no. The extended warranty will apply from the date of
JULABO GmbH’s original invoice.
JULABO GmbH reserves the right to decide the validity of any warranty claim. In case of
faults arising either due to faulty materials or workmanship, parts will be repaired or replaced
free of charge, or a new replacement unit will be supplied.
Any other compensation claims are excluded from this guarantee.
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Operator responsibility – Safety recommendations
2.4. Technical specifications
Water Bath TW2 TW8
Working temperature range °C 20 ... 99,9* 20 ... 99,9*
Temperature stability ±0,2 ±0,2
Temperature selection digital digital
Temperature indication LED LED
Resolution °C 0.1 0.1
Temperature control PID1 PID1
Heater wattage (at 230 V) kW 1,0 2,0
Heater wattage (at 115 V) kW 1,0 1,0
Bath opening (WxL) cm 15x13 23x27
Bath depth cm 11 14
Filling volume liters 1 ... 2 3 ... 8
Overall dimensions (WxDxH)
with Makrolon-cover
Weight kg 3,5 8,5
Ambient temperature °C 5 ... 40 5 ... 40
Mains power connection
230 V/50-60 Hz
Current draw (at 230 V) A 4 8
Mains power connection
115 V/60 Hz
Current draw (at 115 V) A 9 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.
cm 17x16x26
17x16x37
V/ Hz 190-253 / 50-60 190-253 / 50-60
V/ Hz 103-127 / 50-60 103-127 / 50-60
29x32x28
29x32x44
8
Water Baths
Water Bath TW12 TW20
Working temperature range °C 20 ... 99,9* 20 ... 99,9*
Temperature stability ±0,2 ±0,2
Temperature selection digital digital
Temperature indication LED LED
Resolution °C 0.1 0.1
Temperature control PID1 PID1
Heater wattage (at 230 V) kW 2,0 2,0
Heater wattage (at 115 V) kW 1,0 1,0
Bath opening (WxL) cm 35x27 50x30
Bath depth cm 14 18
Filling volume liters 5 ... 14 8 ... 26
Overall dimensions (WxDxH)
with Makrolon-cover
Weight kg 8,9 14,2
Ambient temperature °C 5 ... 40 5 ... 40
Mains power connection
230 V/50-60 Hz
Current draw (at 230 V) A 8 8
Mains power connection
115 V/60 Hz
Current draw (at 115 V) A 9 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.
cm 40x32x28
40x32x44
V/ Hz 190-253 / 50-60 190-253 / 50-60
V/ Hz 103-127 / 50-60 103-127 / 50-60
50x35x32
50x35x49
9
Operator responsibility – Safety recommendations
Safety installations according to IEC 61010-2-010:
Excess temperature protection 105 °C - fixed value
Classification according to DIN 12876-1 class I
Alarm message optical + audible (permanent)
Environmental conditions according to EN 61 010, part 1:
Use only indoor.
Altitude up to 2000 m - normal zero.
Ambient temperature: +5 ... +40 °C (for storage and transportation)
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 fluctuation of ±10 % are permissible.
Protection class according to EN 60 529 IP43
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).
10
Operating instructions
3. Operating controls and functional elements
Front view Rear view
12
Water Baths
11
Example: TW8
1
2
3
4
5
Edit keys (increase/decrease setting)
Enter key (store)
Control indicator –Heating
°C
10
1-7
Mains power switch, illuminated
LED temperature display, menu indication
I on
off
6
7
10 Mains power cable with plug
11 Drainage screw
Connector for liquid level/cooling set (accessory)
12 Handle
Control indicator – Cooling (without function)
Control indicator – Alarm
11
Safety notes for the user
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 described according to an alarm keyword.
Read and follow these important instructions.
Warning:
Describes a possibly highly dangerous situation. If this is not avoided, 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 damage can 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!
Wants to draw your attention to something particular.
Important!
Describes useful information for the operation and the user.
12
5. Safety recommendations
Follow the safety recommendations to prevent damage to persons or property.
Further, the valid safety instructions for working places must be followed.
ConnOnly connect the unit to a power socket with earthing contact
(PE – protective earth)!
Operation is permitted with non-flammable liquids only.
Place the instrument on an even surface on a pad made of non-
inflammable 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.
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).
Water Baths
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 empty the bath before moving the unit.
Never operate equipment with damaged mains power cables.
Condensation that could appear in and on other units near the water bath
may result in reduced operating safety.
Be careful when setting up and operating the water bath!
Some parts of the bath cover may become extremely warm during
continuous operation.
When lifting the bath cover, pay attention to hot steam!
Be careful when touching these parts!
Use safety glasses!
13
Preparations
6. Preparations
6.1. Installation
Caution:
The unit is not for use in explosive environment.
Place the waterbath in an upright position.
>80 mm
Caution:
Potential hazards from the samples
Proper use of shaking water baths includes immersion of samples contained
in test tubes, Erlenmeyer flasks, or other containers for the purpose of
controlling their temperature.
We do not know which substances are contained within these vessels.
Many substances are:
inflammable, easily ignited or explosive
hazardous to health
Keep a wall distance of minimum 80 mm.
14
environmentally unsafe
i.e.: dangerous
The user alone is responsible for the handling of these substances!
Always properly seal all sample containers.
Notice:
There is a danger of electrochemical oxidation or corrosion when using
test-tube racks or samples made of non-ferrous metal.
Avoid using these types of racks or samples.
Use only original JULABO test-tube racks.
6.2. Bath fluids
Recommended bath fluids: soft/decalcified water.
Caution:
Poor water quality may result in corrosion in the bath.
The quality of water (tap water) depends on local conditions.
Due to the high concentration of lime, hard water is not suitable for
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
JULABO takes no responsibility for damages caused by the selection of an
unsuitable bath fluid.
Please contact JULABO before using other than recommended bath fluids.
Do not use flammable bath fluids!
Water Baths
temperature control because it leads to calcification in the bath.
corrosion in the bath, even in stainless steel.
15
Preparations
6.3. Filling / Draining
Filling
Recommended maximum filling level is 25 mm below the
tank rim
Minimum filling level: approx. 1 cm above the perforated
stainless steel base plate.
Note:
The working filling level depends on size and number of the
items (fixtures) to be placed inside.
The recommended procedure is to fill the water bath only
partially, place the items (fixtures) inside and then correct
the filling level (adding or removing liquid) as required.
Draining
Press the mains switch to turn the water bath off
TW2
Take the water bath in both hands and pour out the bath
liquid into a suitable vessel.
TW8, TW12, TW20
Place a suitable collecting bucket or tub underneath the
unit for draining the used bath liquid.
To drain the liquid open the drainage screw (11) on the
side of the water bath.
After the liquid has been fully drained, securely tighten
the drainage screw (11) again.
Warning:
There are thermal dangers when opening the bath cover:
Burn, scald, hot steam, hot parts and surfaces that can be touched.
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).
Recommendation:
Use the water bath cover to keep temperature losses to a
minimum. This is especially important for working
temperatures above 60
C.
16
6.4. Maintaining a constant water level / Counter cooling
Water Baths
For cooling tasks near the ambient air temperature the liquid
level/cooling set can be used for counter cooling.
By special pipe routing, cool faucet water is continuously supplied to
the water bath, while at the same time, the heated water is drained
via the overflow connection of the Level/Cooling set.
A specific water flow rate of 100 ml/minute is sufficient to
compensate for the characteristic temperature.
Caution:
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.
Use of the liquid level/cooling set for a continuous supply of
faucet water:
1. to keep the water level constant, especially for
applications up to the boiling point (supply of faucet
water only in the amount of evaporation losses).
2. for counter cooling of cooling tasks near the ambient
surrounding temperature (cool faucet water is
continuously supplied to the water bath, while at the
same time, the heated water is drained via the overflow
connection of the liquid level/cooling set).
Liquid level/cooling set
Order number: 8 970 415
11 drainage screw on water bath
20 compensation reservoir
21 connecting sleeve
22 supply/drainage sleeve
23 overflow sleeve
24 adaptor screw for constant liquid level function
25 adaptor screw assy. for counter cooling function and
simultaneous constant liquid level control
26 adjuster screw for filling level adjustment
17
Preparations
0
6.5. Accessoires
Lift-up Makrolon covers
Order numbers:
TW2 TW8 TW12 TW20
8 970 289 8 970 286 8 970 287 8 970 288
The lift-up Makrolon
covers are supplied with pre-assembled hinges.
Screw the hinges with the included screws to the rear side of the bath
by means of a screwdriver.
TW2
TW8
TW12
TW20
TW8
TW12
TW20
1
Insert capacity for test tube racks to 100 °C, stainless steel
TW2 1
Order No. Test tube rack
8 970 330 for 24 test tubes 16/17 mm dia.
Insert capacity for test tube racks to 100 °C, stainless steel
TW8 TW12 TW20
2 3 4
Order No. Test tube racks
8 970 344 for 50 test tubes 16/17 mm dia.
8 970 345 for 90 test tubes 12/13 mm dia.
8 970 346 for 90 microliter tubes 16/17 mm dia.
8 970 347 for 21 test tubes 30 mm dia.
Insert capacity for test tube racks to 80 °C, Polypropylene
TW8 TW12 TW20
2 3 4
Order No. Test tube racks
8 970 380 for 60 test tubes 16/17 mm dia.
8 970 381 for 90 test tubes 12/13 mm dia.
8 970 382 for 90 microliter tubes 16/17 mm dia.
8 970 383 for 21 test tubes 30 mm dia.
18
Water Baths
Cooling installation / continuo water supply
Recommendation: for model TW8, TW12, TW20
For continuous water supply and counter-cooling
Order No. Description
8 970 415 Liquid level/cooling set
8 970 416 Cooling coil
Water bath protective media
We recommend the use of the "Aqua-Stabil" protective media to
eliminate the formation of algae, bacteria, and other micro-organisms.
Order No. Description
8 940 006 6 bottles 100 ml each
8 940 012 12 bottles 100 ml each
7. Operating procedures
7.1. 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 cable for material defects.
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.
19
Operating procedures
7.2. Switching on / Start - Stop
Switching on:
Turn on the mains power switch (1).
The unit performs a self-test. All segments of the 4-digit LED
temperature DISPLAY and all indicator lights will illuminate.
Then the software version (example: n 11.0) appears.
Together with the display of the water bath temperature the
operating state is also displayed. (Example: 18.5
The heat-up phase is indicated by the yellow heating control light
C)
Switching off:
7.3. Setting the temperatures
which will blink in regular intervals when the selected
temperature has been attained.
Turn the unit off with the mains power switch.
Setting can be carried out in the start/stop condition.
1. Press one of the keys for a short moment. The setpoint
value instead of the actual value is indicated on the display for
about 8 seconds. The value can now be changed.
2. Change value:
Press
Press
Keep the keys depressed for the value to change fast.
to set a higher value.
to set a lower value.
20
3. Press enter to store the value.
Notice:
When the working temperature is higher than 50 °C, it might happen that due
to strong production of steam there is considerable dripping on the inside of
the lift-up Makrolon cover. Some drops may fall directly into the material to
be tempered.
Always properly seal all sample containers.
8. Troubleshooting guide / Error messages
Water Baths
+
2
1
Whenever the microprocessor electronics registers a failure, a
complete shutdown of the heater and circulating pump is performed.
The alarm light "
The LED temperature display indicates the cause for the alarm in form
of a code.
Safety sensor or working temperature sensor.
The water bath is operated without bath fluid, or the liquid level is
insufficient.
Replenish the bath tank with the bath fluid.
Cable of the working temperature sensor interrupted or short-
circuited.
After eliminating the malfunction, press the mains power switch off and
on again to cancel the alarm state.
If the unit cannot be returned to operation, contact an authorized
JULABO service station.
" illuminates and a continuous signal tone sounds.
9. Cleaning / repairing the unit
Caution:
Improper maintenance or repair can result in electric shock or damage to the
unit.
Repairs and any other work are to be carried out only by qualified service
personnel authorized by JULABO GmbH.
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.
Prevent humidity from entering into the water bath.
Do not use alcohol-based or solvent-based cleaning agents.
These cleaning agents will result in damage and cracks in the Makrolon
cover.
21
Cleaning / repairing the unit
Cleaning:
Repairs:
Returning a unit:
For cleaning the bath tank and the immersed parts of the water
bath, use low surface tension water (e.g., soap suds).
Clean the outside of the unit using a wet cloth and low surface
tension water.
The JULABO Water Baths are designed for continuous operation
under normal conditions. Periodic maintenance is not required.
The tank should be filled only with a bath fluid recommended by
JULABO. To avoid contamination, it is essential to change the
bath fluid from time to time.
Before asking for a service technician or returning a JULABO
instrument for repair, please contact an authorized JULABO
service station.
When returning the unit:
Clean the unit and, if necessary, decontaminate the unit in
order to avoid endangering service personnel.
Attach a short fault description.
If you intend to return your JULABO unit to us, you will find a
Service Return Form on our website www.julabo.de
. Please
use this as a delivery note and include it to the unit or send it in
advance either by Fax or E-Mail.
During transport the unit has to stand upright. Mark the packing
correspondingly.
When returning a unit, take care of careful and adequate
packing.
JULABO is not responsible for damages that might occur from
insufficient packing.
JULABO reserves the right to carry out technical modifications with
repairs for providing improved performance of a unit.
22
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