Koehler K463XX, Руководство по эксплуатации и инструкция

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K463XX Cloud and Pour Point Bath
Operation and Instruction Manual
K463XX-Manual
- 12 -
Setting the Temperature . Set the desired
operating temperature by adjusting the set
point with the up and down keys. The set
point will be displayed in the lower green Set
Point
LED display and the actual
temperature will be displayed in the upper
red Process LED display. Please allow the
instrument
to fully equilibrate before
proceeding with any testing.
Temperature Calibration. This routine allows
the digital temperature controller to be
calibrated to a certified thermometer. In the
calibration mode, the display will always give
2 decimal places.
a. Use a certified calibrated measuring
device to acquire the temperature.
Calculate the difference between the
measuring device and the Process
value displayed on the controller.
b. Press the program key two times until
PCt is displayed in the lower green LED
display. Press the DOWN key. CAL will
display on the lower green display. If
there is a value observed in the upper
red LED display, add it to the calculated
difference obtained in the previous step.
This is the offset value.
c. Press the Program Key. The lower
green display will flash. Use the up or
down keys to adjust to the new
calibration offset value on the upper red
display calculated in the previous step.
When the value has been entered, the
controller will automatically store the
value. The lower green display will stop
flashing. If further adjustments are
necessary, press the Program Key
again. Resume regular operations by
pressing the Exit / Function key two
times. Verify if the new calibration is
correct by observing the upper red
display and comparing the value with
the calibrated reference device.
Auto Tune. This routine allows the digital
temperature control to learn the heating
parameters needed for any particular set
point temperature. This operation should be
done when installing a new unit, after
replacing or changing the bath medium type,
or utilizing a different temperature set point
20% different from the previously used set
point temperature.
a. Set the operating temperature to the
desired setting.
Press the up and down arrow buttons
simultaneously for about 5 seconds. When Auto
Tune is active, the lower green LED display will
blink
TUNE . Auto Tune will automatically toggle
off when the set point temperature is reached.
Auto tune can be terminated by pressing the up
& down buttons simultaneously again.
5 Operation
Be sure to read the safety and hazard
warnings, the installation procedure and any
of the standard test methods mentioned in
the Introduction of this manual before
operating this unit.
5.1 Bath
Fill each bath chamber with the appropriate
bath medium. This can be done by removing
one of the copper jackets in each chamber.
Allowance must be given for the liquid
displacement that would occur when the copper
jacket is returned to its position. When all jackets
are in position, the liquid medium level should be
no more than 25 mm from the top. The level can
be checked my means of a dipstick through the
thermometer hole.
The manufacturer is unable to make any specific
recommendation on the choice of a bath
medium. Safety, toxicity, flammability and other
factors must be taken into account while
selecting a bath medium. However, during tests
at the factory, 200 proof (water free) denatured
ethanol was used with satisfactory results. Other
users have reported methanol to also be an
adequate bath medium as well.
Glycol water mixtures are not a very suitable
bath medium since partial freezing around the
refrigeration coils and high fluid viscosity will
reduce cooling efficiency with the resultant
increase in bath temperature. Furthermore, in
extreme cases, damage to the bath may also
occur which will void the warranty.