Keithley 6517B Reference Manual page 467

Section 16: Verification procedure
2 MΩ to 200 MΩ range verification
1. Connect the Model 6517B to the resistance calibrator, as shown in the figure below.
2. Turn on the Model 6517B and the calibrator, and allow a one-hour warm-up period before making
measurements.
3. Restore Model 6517B factory default conditions, as explained in
4. Select the ohms function by pressing R.
5. Select the Model 6517B 2MΩ range, and make sure the filter is enabled.
6. Set the calibrator resistance to a nominal 1.9MΩ resistance value.
7. Place the voltage source in operate.
8. Make sure zero check is disabled, and allow the reading to settle. Verify that the displayed ohms
reading is within limits for the selected range listed in the table below.
9. Repeat steps 5 through 8 for the 20MΩ and 200MΩ ranges.
10. Turn off the Model 6517B voltage source, then disconnect the resistance calibrator from the
Model 6517B.
Model 6517B range
2 MΩ
20 MΩ
200 MΩ
2 GΩ
20 GΩ
200 GΩ
2 TΩ
20 TΩ
200 TΩ
1 Resistance calibrator used for 2MΩ to 200 MΩ ranges. Characterized resistance standards used for
200 GΩ to 200 TΩ ranges. Standards must be characterized to uncertainty at least four times better
than equivalent Model 6517B specifications and mounted in shielded test box (refer to the "Shielded
fixture construction" figure in the following).
2
Reading limits calculated from actual resistance value and Model 6517B specifications. See text.
16-14
Figure 139: Connections for ohms verification - 2 MΩ to 200 MΩ range
Nominal resistance
1.9 MΩ
19 MΩ
100 MΩ
1 GΩ
10 GΩ
100 GΩ
1 TΩ
10 TΩ
100 TΩ
Model 6517B Electrometer Reference Manual
Considerations
1 2
Reading limits
(1 year, 18 °C – 28 °C)
___________ to __________ MΩ
___________ to __________ MΩ
___________ to __________ MΩ
___________ to __________ GΩ
___________ to __________ GΩ
___________ to __________ GΩ
___________ to __________ TΩ
___________ to __________ TΩ
___________ to __________ TΩ
6517B-901-01 Rev. C / August 2015
(on page 16-3).