Ac Current Calibration - QuadTech Sentry Plus Series Instruction Manual

4.3.6 AC Current Calibration (ACA)
Connect the OUTPUT terminal of the Sentry Plus Series instrument to a resistance box or
resistance standard. Connect an AC/DC current meter in series between the resistance load
(box/standard) and the RTN/LOW terminal of the Sentry Plus instrument. Table 4-3 lists the
resistance loads necessary for the current calibration steps.
Mode
ACA
ACA
ACA
ACA
DCA
DCA
DCA
DCA
Press [F1] = UP to go to
Press [STOP] to return instrument to steady state.
Press [START] to get offset value.
Press [F1] = INC or [F2] = DEC until the SPlus display reads the same as the current meter.
Press [ENTER] to accept reading.
Sentry Plus reverts to "ACA 3mA Offset" display (incorporating the new cal value).
Press [F1] = UP to go to
Press [STOP] to return instrument to steady state.
Press [START] to get full value.
Press [F1] = INC or [F2] = DEC until the SPlus display reads the same as the current meter.
Press [ENTER] to accept reading.
Sentry Plus reverts to "ACA 3mA Full" display (incorporating the new cal value).
Press [F1] = UP to go to
Press [STOP] to return instrument to steady state.
Press [START] to get offset value.
Press [F1] = INC or [F2] = DEC until the SPlus display reads the same as the current meter.
Press [ENTER] to accept reading.
Sentry Plus reverts to "ACA 30mA Offset" display (incorporating the new cal value).
Press [F1] = UP to go to
Press [STOP] to return instrument to steady state.
Press [START] to get full value.
Press [F1] = INC or [F2] = DEC until the SPlus display reads the same as the current meter.
Press [ENTER] to accept reading.
Sentry Plus reverts to "ACA 30mA Full" display (incorporating the new cal value).
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Table 4-3: Resistance Loads
Step # Voltage
CAL 7 1200 V
CAL 8 1200 V
CAL9 1200 V
CAL 10 1200 V
CAL 11 1200 V
CAL 12 1200 V
CAL 13 1200 V
CAL 14 1200 V
Cal Step 7: 'ACA 3mA Offset
Cal Step 8: 'ACA 3mA Full
Cal Step 9: 'ACA 15mA Offset
Cal Step 10: 'ACA 15mA Full
Calibration Resistance
Point (Load)
0.12mA
10MΩ
2.4mA full
500kΩ
2.4mA
500kΩ
12mA
100kΩ
0.12mA
10MΩ
2.4mA full
500kΩ
2.4mA
500kΩ
4.8mA
250kΩ
(0.12mA)'.
(2.4mA)'.
(2.4mA)'.
(12mA)'.
Service & Calibration