SECTION 4
CALIBRATION PROCESS
NOTE
Unless otherwise specified, verify the results of each test and take corrective action whenever
the test requirement is not met, before proceeding.
4.1 LINE REGULATION TEST
4.1.1 Set the TI control(s) for a 10V dc output, and adjust the differential voltmeter control(s) as required for a
reference null indication.
4.1.2 Adjust the autotransformer output voltage to 105V, and verify that the differential voltmeter indication is
10 V or less.
4.1.3 Adjust the autotransformer output voltage to 115V and reestablish a reference null on the differential
voltmeter.
4.1.4 Adjust the autotransformer output voltage to 125V, and verify that the differential voltmeter indication is
10 V or less.
4.1.5 Adjust the autotransformer output voltage to 115V, set the TI for a minimum output, and disconnect the
test configuration.
4.2 DC VOLTAGE RANGE TEST
4.2.1 Set the dc voltage standard controls as follows:
Power switch to STDBY/RESET
Voltage Range switch to 100
Voltage dials set for 100V output
Voltage Trip switch to 100 (332B)
Voltage Trip vernier fully cw
Meter switch to voltage
Current Limit control as required
NAVAIR 17–20AQ–70
5
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