Picotest M3500A - Page 37

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609 DC gain x1 failed This procedure is to test the tolerance of DC gain
×
1
amplifier. The limit of gain tolerance is
±
0.005.
610 DC gain x10 failed This procedure is to test the tolerance of DC
gain
×
10 amplifier. The limit of gain tolerance is
±
0.05.
611 DC gain x100 failed This procedure is to test the tolerance of DC
gain
×
100 amplifier. The limit of gain tolerance is
±
0.5.
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
5
µ
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
±
0.01V.
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
±
5 mV.
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
10
µ
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
±
0.01V.
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.