Keithley DMM7510 Calibration Manual page 48

Model DMM7510 7½ Digit Graphical Sampling Multimeter Calibration Manual
Verify dry circuit accuracy
To verify dry circuit resistance accuracy:
1. Connect the Model DMM7510 INPUT and SENSE terminals to the calibrator as shown in the
following figure.
2. Set the calibrator for 4-wire resistance with external sense on.
3. On the Model DMM7510, press the FUNCTION key and select 4W Res.
4. Press the HOME key.
5. Set the range to 1 Ω.
6. Press the MENU key.
7. Select Measure Settings.
8. Set Dry Circuit On. Verify that Offset Compensation is on. (Selecting Dry Circuit should
automatically enable Offset Compensation.)
9. Source the nominal full-scale resistance values for the 1 Ω to 2 kΩ ranges as shown in the
following tables.
10. For the 10 kΩ range, verify with 1.9 kΩ. Overrange is 2.4 kΩ for the 10 kΩ range.
11. Verify that the readings are within calculated limits.
Verify dry circuit resistance values
Use the following values to verify the performance of the Model DMM7510. Actual values depend on
published specifications (see
Range
1
10
DMM7510-905-01 Rev. A / April 2015
Calculating resistance reading limits
Nominal calibrator
value
(Ω)
0
1.000000
0
10.00000
Typical reference Lower limit
(Ω)
DMM reading
(Ω)
-8.00E-05
1.0001568E+00 1.000027E+00
-8.00E-04
9.9994500E+00 9.998150E+00
Section 2: Performance verification
(on page 2-8)).
Upper limit
(Ω)
8.00E-05
1.000287E+00
8.00E-04
1.000075E+01
2-39