VWR International 1200 Series User manual

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WATER BATHS
Model 1200 Series
Microprocessor Control
Models: 1225, 1225PC,
1235, 1235PC,1245, 1245PC,
1255,1255PC, 1295PC
Installation And Operation Manual
Sheldon Manufacturing Inc. P.O. Box 627 Cornelius, Oregon 97113
EMAIL: [email protected] INTERNET: http://www.Shellab.com/~Shellab
1-800-322-4897 [phone] FAX [phone]
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TABLE OF CONTENTS
SECTION 1.0 RECEIVING AND INSPECTION
SECTION 2.0 INSTALLATION
SECTION 3.0 CONTROLS OVERVIEW
SECTION 4.0 OPERATION
SECTION 5.0 MAINTENANCE
SECTION 6.0 TROUBLESHOOTING
SECTION 7.0 PARTS LIST
UNIT SPECIFICATIONS
SCHEMATICS
REV 3/03
4861361
These units are general purpose water baths for professional, industrial or educational
use where the preparation or testing of materials is done approximately atmospheric
pressure and no flammable, volatile or combustible materials are being heated. These
units are not intended for hazardous or household locations or use.
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RECEIVING AND INSPECTION
Your satisfaction and safety require a complete understanding of this unit. Read
the instructions thoroughly and be sure all operators are given adequate training
before attempting to put the unit in use. Note that this equipment must be used
only for its intended application; any alterations or modifications will void your
warranty.
1.1 Inspection: The carrier, when accepting shipment, also accepts responsibility for
safe delivery and is liable for loss or damage. On delivery, inspect for visible exterior
damage, note and describe on the freight bill any damage found, and enter your
claim on the form supplied by the carrier.
1.2 Inspect for concealed loss or damage on the unit itself, both interior and exterior. If
any, the carrier will arrange for official inspection to substantiate your claim.
1.3 Return Shipment: If for any reason you must return the unit, contact your service
representative for authorization and supply nameplate data. Please see the manual
cover for information on where to contact Customer Service.
1.4 Accessories: Verify that all of the equipment indicated on the packing slip is
included with the unit. Carefully check all before discarding. All units (except
1295PC) are equipped with 1 bath cover and 1 thermometer clip, except for the 1255
which is equipped with 2 bath covers and 2 thermometer clips.
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INSTALLATION
Local city, county, or other ordinances may govern the use of this equipment. If you have
any questions about local requirements, please contact the appropriate local agency.
Installation may be performed by the end user.
Under normal circumstances this unit is intended for use indoors, at room temperatures
between 5°and 40°C, at no greater than 80% Relative Humidity ( at 25°C ) and with a
supply voltage that does not vary by more than 10%. Customer service should be
contacted for operating conditions outside of these limits.
2.1 Power Source: Check the data plate for voltage, cycle, phase and ampere
requirements. If matched to your power source, plug the power cord into a
grounded outlet. VOLTAGE SHOULD NOT VARY MORE THAN 10% FROM THE
DATA PLATE RATING. These units are intended for 50/60 Hz application. A
separate circuit is recommended to preclude loss of product due to overloading or
circuit failure. Note: Electrical supply to the unit must conform to all national and
local electrical codes.
2.2 Location: In selecting a location, consider all conditions which might affect
performance, such as heat from radiators, ovens, autoclaves, etc. Avoid direct sun,
fast-moving air currents, heating/cooling ducts and high-traffic areas. Allow a
minimum of 5cm between the unit and walls or partitions which might obstruct free
airflow.
2.3 Lifting / Handling: These units may be heavy for some people and care should be
taken to use appropriate lifting devices that are sufficiently rated for these loads.
Units should only be lifted from their bottom surfaces. Handles and knobs are not
adequate for lifting or stabilization. The unit should be completely restrained from
tipping during lifting or transport. All moving parts such as trays or covers should be
removed during transfer to prevent shifting and damage.
2.4 Cleaning: These units were cleaned at the factory, but not sterilized. Remove any
racks if assembled and clean the bath with a disinfectant that is suitable for your
application. Rinse clean with water and wipe dry. DO NOT USE chlorine-based
bleaches or abrasives as this will damage the tank, regardless if it is stainless steel
or polymer coated. DO NOT USE spray cleaners that might leak through openings
Section
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and cracks and get on electrical parts or that may contain solvents that will harm
coatings. A similar periodic cleaning is recommended.
WARNING: Never clean the unit with alcohol or flammable cleaners with the unit
connected to the electrical supply. Always disconnect the unit from the electrical
service when cleaning and assure all volatile or flammable cleaners are evaporated
and dry before reattaching the unit to the power supply.
2.5 Bath Cover: using the bath cover will accelerate heat-up time and reduce
evaporation. The cover must be used to reach set points above 60°C. Note that
the cover is not designed to be air tight and create a pressurized environment.
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CONTROLS OVERVIEW (See Figure 1)
3.1 Power Switch: The main I/O (On/Off) power switch, located at the back of the unit,
controls all power to the unit. It must be in the ON position before any systems are
operational.
3.2 Main Temperature Controller: This control is marked TEMPERATURE and
consists of the digital display and Up/Down arrow pads for inputting set point
temperature and calibration.
3.3 Over Temperature Safety Thermostat: This controller is marked OTP and is
completely independent of the Main Temperature Controller. The Safety guards
against any failure of the Main Controller which would allow temperature to rise past
set point. If temperature rises to the safety set point, the Safety takes control of the
heating element and allows continued use of the water bath until the problem can
be resolved or service can be arranged. The Safety is manually adjusted with a
screwdriver or coin so accidental adjustment cannot occur.
3.4 Heating Light: This light is ON when the Main Controller has activated the heating
element to reach and maintain set point.
3.5 OTP Light: This light is ON when the Over Temperature Safety Thermostat has
been activated. Under normal operating conditions this light should never be on.
3.6 Fuse / Circuit Breaker: Your unit will either be equipped with a fuse or a circuit
breaker. Fuses will be installed in the power inlet on 220 volt CE units. Circuit
breakers will be adjacent to the power cord on all others. The fuse/circuit breaker is
an added measure of protection for the unit against power surges and fluctuation. If
the fuse is blown, it must be replaced before the unit will continue to operate. The
circuit breaker can be reset by pushing in the extended button. The reason for
power interruption should be cleared before replacement of the fuse or resetting of
the circuit breaker is done.
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Figure 1
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OPERATION
WARNING: THESE BATHS ARE NOT INTENDED FOR USE AS ACID BATHS. USE
AS AN ACID BATH WILL CAUSE SEVERE DAMAGE TO BATH COMPONENTS. DO
NOT USE DEIONIZED WATER, TAP WATER, OR CHEMICALS. USE DISTILLED
WATER ONLY. DO NOT TURN THE UNIT ON UNLESS THE TANK HAS WATER IN IT.
IF RAN DRY AT MAXIMUM TEMPERATURE, COATING MIGHT PEEL OFF.
4.1 Check power supply against unit serial plate; they must match. Plug service cord
into the electrical outlet.
4.2 Fill bath to your required depth with DISTILLED WATER. DO NOT USE tap water.
DO NOT USE deionized water. Note that normal depth is two-thirds full, but depth
must be at least 5cm.
4.3 Push the main power switch to the ON position, and turn the Over Temperature
Safety to its maximum position, clockwise, using a screwdriver or coin.
4.4 Set Main Temperature Control: Enter desired set point temperature. To enter set
point mode on the Control, press the Up or Down arrow pad one time. The digital
display will start to blink, going from bright to dim. While blinking, the digital display
is showing the set point. To change the set point, use the Up and Down arrow pads.
If the arrow pads are not pressed for five (5) seconds, the display will stop blinking
and will read the temperature in the bath. Allow the water bath at least two hours to
stabilize once set point is established.
4.5 Calibrating the Control: It is recommended that the digital display be calibrated
once the unit is in its working environment. The water bath, having reached set
point and allowed to stabilize, is ready to calibrate. Place a certified reference
thermometer in the bath (a clip is provided with your accessory package. See figure
2for placement). Allow the thermometer to reach temperature where it remains
stabile for one hour. Compare the reading on the reference thermometer with the
digital display. If there is a difference, put the display into calibrate mode by
pressing the UP/DOWN arrow pads at the same time until the two outside decimal
points start to flash. When the decimal points are flashing, the display can be
changed to match the reference thermometer by pressing the UP or DOWN arrow
pads until the display reads the correct value. If the arrow pads are not pressed for
five (5) seconds the display will revert back to its original parameter. Allow the unit
to stabilize again then verify that the display matches the reference thermometer.
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4.6 Set Over Temperature Safety Thermostat: As mentioned in step 4.3, the Safety
Thermostat should be initially set to its maximum position to allow the water bath to
stabilize. Once the bath is stabile at the set point, turn the Safety Thermostat
counterclockwise until the OTP light turns on. Next turn the Thermostat clockwise
just until the OTP light turns off. Then turn the Thermostat clockwise two (2) of the
smallest divisions on its scale past the point where the light went out. This will set
the Safety Thermostat at approximately 1°C above Main Temperature set point.
Figure 2
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