VWR PROFESSIONAL Serie Manuel D'instruction page 11

T C P
EMPERATURE ALIBRATION ROCEDURE
This method can be used for calibrating the RTD probe if connected to the
unit or the top plate surface of the unit if the RTD probe is not connected.
1. If unit is in standby mode press the standby button to take unit out of
standby mode.
2. To set a Single Point Calibration adjustment:
a. Set the unit to the desired temperature, turn the temperature control
system on and let the system stabilize to the user input temperature.
b. While pressing and holding the standby button, press and release the
temperature up button.
c. The unit will beep two times (if not in silent mode) and the
temperature display will blink to indicate a Single Point Calibration
adjustment is in progress.
d. Measure the sample with a traceable thermometer or temperature
probe.
e. Use the temperature up and down buttons to adjust the display to read
the actual measured temperature indicated on the external
temperature measuring device. (Example: Desired temperature is 80°C.
Set unit at 80°C per step (a). Follow steps (b & c). Display reads 80°C
and the external temperature measuring device reads higher at
84°C.Push the temperature up arrow so the display will match the
external temperature device and also read 84°C. By doing this a biased
offset for 80°C will be used any time the unit is set to 80°C)
f. Press the standby button to save the Single Point Calibration
adjustment. The temperature display will stop blinking and the
decimal point will flash periodically to indicate that a Single Point
Calibration adjustment is in use. This indication will occur whenever
the temperature is adjusted to the temperature used in part "a" of this
procedure.
(S P C )
INGLE OINT ALIBRATION
g. This process may be repeated for up to three separate set points. If a
fourth calibration set point is entered, the first set point will be
overwritten.
h. The adjustments are limited to the maximum and minimum
temperature range of the particular model.
The unit will now use the biased offset for that specific temperature setting
and increase or decrease temperature accordingly to bring the unit
temperature to set-point. The decimal point of the display will flash to
indicate a biased offset is being used. All other temperature settings will use
the factory default settings. The offset will be stored in memory and retained
until reset.
3. To clear all existing Single Point Calibration adjustments:
a. Top plate Single Point Calibration adjustments can only be cleared with
the RTD probe not connected to the unit. RTD probe Single Point
Calibration adjustments can only be cleared with the RTD probe
connected to the unit.
a. While pressing and holding the standby button, press and release the
temperature down button.
b. The unit will beep two times (if not in silent mode) to indicate all
Single Point Calibration adjustments have been cleared.
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