Koehler K463XX, Operation And Instruction Manual

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K463XX Cloud and Pour Point Bath
Operation and Instruction Manual
K463XX-Manual
- 13 -
5.2 Power
Turn on the main power switch to the unit using
the line switch.
WARNING: Do NOT turn the power on
unless the bath is filled with the proper medium;
otherwise, damage may occur to the unit and
the warranty would be void.
5.3 Temperature Control
1. As seen from the front of the unit, the lowest
temperature chamber is on the left, with
successively
higher temperatures
proceeding from left to right. The controls
are set at -51, -33, -18, and 0

C (see
Section 4.1). The temperature controller for
each chamber has been factory preset for
operation at set points as per the ASTM D97
and D2500 standard test methods. Each
chamber
will automatically come to
equilibrium at its set temperature.
2. Place the calibrated thermometer into the
center of each of the
four chambers to the
proper immersion depth. Each chamber is
controlled
by the digital temperature
controller positioned in line with it.
3. Wait for the temperature to stabilize before
using the bath. If readjustment of the
chamber temperatures becomes necessary,
use the
UP or DOWN arrows on the
controller until the desired setpoint is
achieved. Allow time for the bath to stabilize
after each adjustment.
WARNING: Disconnect all electrical
power before removing the protective back
to prevent injury.
WARNING: For personal safety, do
not operate the bath with the cover
removed, because there is a possibility of
electrical shock.
4. Proceed to test in accordance with
published test methods (see Section 1.3)
6 Maintenance
WARNING: Disconnect power to the unit
before servicing to avoid exposure to high
voltages and/or temperatures which may result
in personal injury or death. If you have any
questions about maintaining your equipment,
then please do not hesitate to contact the
Koehler technical service department.

For maximum refrigeration efficiency,
periodically remove the cover and clean the
refrigeration condensers using a pressurized
air blast or vacuum cleaner with a brush.

With time, particularly in a humid
environment, the test bath fluid will
accumulate water. The resultant increase in
viscosity and or freezing on the refrigeration
coil
reduces the efficiency of the
refrigeration.

Check each chamber weekly, examining the
liquid level and the extent of water
contamination in the bath medium. The
chambers should be emptied, wiped dry,
and filled with fresh, dry bath medium.

Failure to attain or maintain temperature is
usually due to water saturation of the bath
medium, excessive dust collecting on the
refrigeration
condensers, a defective
condenser fan, poor electrical connection at
the power plug or a refrigeration leak.

In case of a temperature failure, check each
of the above. In case of a leak, have a
qualified serviceman contact the factory
service department. We will advise how to
charge the suspected system with the
proper
refrigerant. When a leak is
suspected, check with a halide or electronic
detector. Repair, evacuate and recharge
with the proper refrigerant