West Control Solutions 8700+ - Manual (Page 137)

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- DIN Controllers & Indicators - Product Manual
Page 132
Calibration 59305, Issue 7 – March 2014
Recalibration Procedure
Recalibration is carried out in five phases as shown in the table below, each phase
corresponds to an input range of the instrument.
CAUTION:
The 50mV phase MUST be calibrated before the thermocouple range.
Table 42. Input Calibration phases

50 mV

 10 V

20 mA

RTD input (200 ohm)

Thermocouple (K type source at 0ºC required)
To start calibration, apply the required calibration input from the source type list above, using
the correct connections,
1. Whilst the instrument is powering up, press and together until

is displayed.
Note:
If a phase has not been previously calibrated the display will flash.
2. Press to initiate calibration on PID Controllers, or
Press to initiate calibration on Limit Controllers, or
Press and together to initiate calibration on Indicators.
3. During calibration the display changes to

for a few seconds.
4. If the input is misconnected or an incorrect signal is applied the calibration will be aborted
and the display will shown

. The previous calibration value will be retained.
5. If the calibration has succeeded, the pass display is shown
 (non-flashing).
6. Press to step onto the next phase.
7. Repeat this process for each input type until all the phases are calibrated.
Note:
Switch off the instrument to exit the Calibration Mode.
Calibration Mode automatically exits if there is no button activity for five minutes.