76
Service
3-10
Table 3-3. mV DC Voltage Test
Step
Input
Display Reading
Range Voltage
1 400 MV +350 MV 348.8 To 351.2 MV DC
2 40 MV SHORT 0 To ± .05 MV DC
3 40 MV +35 MV 34.84 To 35.16 MV DC
4 40 mV -35 mV -34.84 to -35.16 mV DC
AC Voltage Test 3-16.
Warning
Injury hazard. Connect the ground/common/low side of the AC
calibrator to common on the UUT.
1. Set the UUT function switch to V AC, and connect the AC Calibrator to the VΩ
and COM input terminals.
2. Set the AC Calibrator for the output given in Table 3-4, and verify that the UUT
display reading is within the limits shown.
Note
When the input is open in the V AC function, it is normal for the meters to
read some counts on the display. This is due to ac pickup in the ac amplifier
when the ac amplifier is unterminated.
Table 3-4. AC Voltage Test
Step
Input
Display Reading
Range Voltage Freq.
1 400 mV 20 mV 100 Hz 19.2 to 20.8 mV AC
2 400 mV 350 mV 100 Hz 343.0 to 357.0 mV AC
3 400 mV 350 mV 1 kHz 343.0 to 357.0 mV AC
4 4V 200 mV 100 Hz .194 to .206V AC
5 4V 3.5V 100 Hz 3.432 to 3.569V AC
6 4V 3.5V 1 kHz 3.432 to 3.569V AC
7 40V 35V 1 kHz 34.46 to 35.55V AC
8 400V 350V 1 kHz 344.6 to 355.5V AC
9 600V 600V 1 kHz 589 to 611V AC
Frequency Test 3-17.
1. Set the UUT function switch to Hz and connect the Function Generator output to the
VΩ and COM input terminals of the UUT.
2. Referring to Table 3-5, set the Function Generator for the output indicated in the
steps. Verify that the UUT display reading is within the limits shown.
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