Picotest M3500A Service Manual page 37

609 DC gain x1 failed This procedure is to test the tolerance of DC gain
amplifier. The limit of gain tolerance is
610 DC gain x10 failed This procedure is to test the tolerance of DC
×
gain 10 amplifier. The limit of gain tolerance is
611 DC gain x100 failed This procedure is to test the tolerance of DC
×
gain 100 amplifier. The limit of gain tolerance is
612 Ohms 500 nA source failed This test configures to the 10V dc range
with the internal 10M 100:1 divider R204 connected across the input. The
500nA ohms current source is connected to produce a nominal 5V signal. A
20ms ADC measurement is performed and the result is checked against a
±
limit of 5V 1V.
613 Ohms 5 uA source failed This test configures to the 1000V dc range
with the internal 10M 100:1 divider R204 connected across the input. The
µ
5 A ohms current source is connected. The compliance limit of the current
source is measured. A 20ms ADC measurement is performed and the result
is checked against a limit of 0.12V
614 DC 1000V zero failed This test configures to the 1000V dc range with
no input applied. A 20ms ADC measurement is performed and the result is
checked against a limit of 0V
615 Ohms 10 uA source failed This test configures to the 1000V dc range
with the internal 10M 100:1 divider R204 connected across the input. The
µ
10 A ohms current source is connected. The compliance limit of the current
source is measured. A 20ms ADC measurement is performed and the result
is checked against a limit of 0.12V
616 DC current sense failed This test configures to the 3A dc range. A
20ms ADC measurement is performed and the result is checked against a
±
limit of 0A 5A. This test confirms that the dc current sense path is
functional. The test limit is set wide because K303 does not open the current
input during self-test. This test should catch a dc current sense failure
without causing false failures when current inputs are applied during
self-test.
±
0.005.
±
0.01V.
±
5 mV.
±
0.01V.
37
±
0.05.
±
0.5.
×
1