West Control Solutions ProVU 4 - Manual (Page 131)

ProVU4 Controller, Profiler & Recorder/Controller - Product Manual
Page 130 Calibration 59407, Issue 1 – March 2008
Recalibration Procedure
Recalibration is carried out in five phases as shown in the table below; each phase
corresponds to a basic input type.
CAUTION:
The 50mV phase MUST be calibrated before the thermocouple range.
Table 27. Input Calibration phases
DC milli-volt Calibration 50 mV
DC voltage Calibration

10 V
DC milliamps Calibration 20 mA
RTD Calibration 200 ohm
Thermocouple Calibration K type source at 0ºC
1. During the instrument’s power-up “splash screen”, press

and

together until the
Calibration Status screen is displayed.
2. Press

to select the first calibration phase (50mV Calibration)
3. Ensure that an accurate 50mV signal has been applied to terminals 2 (+ve) and 3 (-ve),
then press

+

to initiate the calibration.
4. During calibration the message “50mV DC Input Calibrating” will display for a few
seconds. This should be followed by the “Calibration Successful” confirmation.
5. If the input is misconnected or an incorrect signal is applied, the calibration will be aborted
and the display will show “Failed: Signal Too Large! or Failed: Signal Too Large!”. The
previous calibration value will be retained.
6. Press

to select the next calibration phase.
7. Repeat this process for each input type until all the phases are calibrated. For each phase,
ensure that the correct input is applied, using the correct connections.
8. Once all calibration phases are completed, recorder versions will display the Calibration
Reminder Date. If required, this can be changed to the date of you next calibration check.
Ensure that Calibration Reminders are enabled in Input Configuration to receive a
reminder.
9. Press

+

to exit to the main menu.
Note:
Calibration Mode automatically exits if there is no button activity for two minutes.