1-30 Performance Verification Model 2750 Multimeter/Switch System Service Manual
6. Set the Model 2750 for the 1 range, and make sure the FILTER is on. If previ-
ously disabled, enable OCOMP (offset-compensated ohms) by pressing SHIFT
then OCOMP. (Use OCOMP for 1, 10, 100, and 1krange verification.)
Enable line sync (press SHIFT then LSYNC).
7. Recalculate reading limits based on actual calibrator resistance values.
NOTE Maximum reading rate for 1k¾ dry circuit is two readings per second.
8. Source the nominal full-scale resistance values for the 1-1k ranges summarized
in Table 1-15, and verify that the readings are within calculated limits.
Tab le 1- 15
Limits for plug-in module dry circuit resistance verification
Range
Nominal
Resistance
Nominal Reading Limits
(1 year, 18°C to 28°C) Recalculated Limits**
1
10
100
1k
1
10
100
1k
0.999860 to 1.000140
9.99860 to 10.00140
99.9820 to 100.0180
0.999510 to 1.000490k
__________ to __________
__________ to __________
__________ to __________
__________ to __________ k
* Enable OCOMP (offset-compensated ohms) when testing 1, 10, 100and 1k ranges.
** Calculate limits based on actual calibration resistance values and Model 2750 one-year resistance accuracy
specifications. See “Verification limits.”
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