BNC 1201 - 6 1/2 Digit Digital Multimeter - Manual (Page 109)

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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  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  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.
617 Ohms 100 uA source failed This test configures to the 1000V dc
range with the internal 10M 100:1 divider R204 connected across the
input. The 100  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.
618 DC high voltage attenuator failed This test configures to the
1000 V dc range. 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.