Verifying Dry Circuit Resistance - Keithley 2750 Service Manual

1-16 Performance Verification
Table 1-6
Limits for normal resistance verification
 Range
1
10
100
1k
10k
100k
1M
10M
100M
* Enable OCOMP (offset-compensated ohms) when testing 1, 10, and 100 ranges.
** Calculate limits based on actual calibration resistance values and Model 2750 one-year resistance accuracy
specifications. See

Verifying dry circuit resistance

Check the dry circuit resistance function by connecting accurate resistance values to the
Model 2750 and verifying that its resistance readings are within the specified limits.
CAUTION
Follow these steps to verify dry circuit resistance accuracy:
1.
Nominal Nominal Reading Limits
Resistance (1 year, 18°C to 28°C)
1 0.999820 to 1.000180
10 9.99880 to 10.00120
100 99.9880 to 100.0120
1k 0.999894 to 1.000106k
10k 9.99894 to 10.00106k
100k 99.9890 to 100.0110k
1M 0.999890 to 1.000110M
10M 9.99590 to 10.00410M
100M 99.7970 to 100.2030M
"Verification limits."
Do not apply more than 1000V peak between front terminals INPUT HI
and LO or more than 350V peak between SENSE HI and LO, or instru-
ment damage could occur.
Using shielded, Teflon-insulated or equivalent cables in a 4-wire configuration,
connect the Model 2750 INPUT and SENSE jacks to the calibrator as shown in
Figure 1-7. Be sure the INPUTS switch is in the FRONT position.
Model 2750 Multimeter/Switch System Service Manual
__________ to __________ 
__________ to __________ 
__________ to __________ 
__________ to __________ k
__________ to __________ k
__________ to __________ k
__________ to __________ M
__________ to __________ M
__________ to __________ M
Recalculated Limits**