QuadTech Sentry 10 Plus, Instruction Manual

Page: 80 / 85

Page 80 of 85 Service & Calibration
4.3.3 AC Voltage Calibration
Connect the OUTPUT terminal of the Sentry Plus Series unit to the input terminal of the AC/DC
high voltage meter. Connect the RTN/LOW terminal of the Sentry Plus to the GND terminal of
the voltmeter. Set the voltmeter to AC and 2kV range.
Cal Step 1: ‘ACV 5kV Offset (50V)’
Press [STOP] to return instrument to steady state.
Press [START] to get offset value.
Press [F1] = INC or [F2] = DEC until the Sentry Plus display reads the same as the voltmeter.
Press [ENTER] to accept reading.
Sentry Plus reverts to “ACV Offset” display (incorporating new cal value).
Press [F1] = UP to go to
Cal Step 2: ‘ACV 5kV Full (4kV)’ . Change voltmeter range to 20kV.
Press [STOP] to return instrument to steady state.
Press [START] to get full value
Press [F1] = INC or [F2] = DEC until the Sentry Plus display reads the same as the voltmeter.
Press [ENTER] to accept reading.
Sentry Plus reverts to “ACV Full” display (incorporating new cal value).
4.3.4 DC Voltage Calibration (DCV)
Change the setting on the Valhalla voltmeter to DC and 2kV range. DC calibration is applicable
to the Sentry 20 Plus and Sentry 30 Plus instruments.
Press [F1] = UP to go to
Cal Step 3: ‘DCV 6kV Offset (50V)’ .
Press [STOP] to return instrument to steady state.
Press [START] to get offset value.
Press [F1] = INC or [F2] = DEC until the Sentry Plus display reads the same as the voltmeter.
Press [ENTER] to accept reading.
Sentry Plus reverts to “DCV Offset” display (incorporating new cal value).
Press [F1] = UP to go to
Cal Step 4: ‘DCV 6kV Full (4kV)’ . Change voltmeter range to 20kV.
Press [STOP] to return instrument to steady state.
Press [START] to get full value.
Press [F1] = INC or [F2] = DEC until the Sentry Plus display reads the same as the voltmeter.
Press [ENTER] to accept reading.
Sentry Plus reverts to “DCV Full” display (incorporating new cal value).