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8842A
Instruction Manual
6-8
Table 6-4. High-Frequency AC Voltage Test
INPUT TEST LIMITS (IN VOLTS)
STEP
NUMBER
RANGE
VOLTAGE FREQUENCY
ERROR
IN
COUNTS
MIN MAX
1 200 mV 0.010000V 50 kHz 169 09.831 mVAC 10.169 mVAC
2 * 200 mV 0.010000V 100 kHz 350 09.650 mVAC 10.350 mVAC
3 * 2V 0.10000V 100 kHz 350 0.09650 VAC 0.10350 VAC
4 * 20V 1.0000V 100 kHz 350 0.9650 VAC 1.0350 VAC
5 * 200V 10.000V 100 kHz 350 09.650 VAC 10.350 VAC
6 * 700V 100.00V 100 kHz 350 96.50 VAC 103.50 VAC
7 20V 19.0000V 100 kHz 1250 18.8750 VAC 19.1250 VAC
8 200 mV 0.190000V 100 kHz 1250 188.750 mVAC 191.250 mVAC
* Quick test points.
6-6. Resistance Test
The following procedure may be used to verify the accuracy of the 2-wire and 4-wire
ohms functions.
1. Ensure the 8842A is on and has warmed up for at least 1 hour.
2. Connect the Resistance Calibrator to the 8842A for 4-wire ohms.
3. For each step in Table 6-5, select the indicated range, set the Resistance Calibrator
for the specified nominal input. When the input is 0Ω(short), press the OFFSET
switch and verify that the OFFSET anunciator is illuminated.
NOTE
A new OFFSET must be stored for each new range selected.
a. Test the 4-wire ohms function:
1. Select the 4-wire ohms function.
2. Verify that the displayed reading is within the limits shown for
each reading rate.
b. Test the 2-wire ohms function:
1. Select the 2-wire ohms function. (The SENSE test leads need not
be disconnected.)
2. Verify that the displayed reading is within the limits shown for
each reading rate.