Model 6517B Electrometer Reference Manual Section 16: Verification procedure
6517B-901-01 Rev. C / August 2015 16-15
2 GΩ to 200 GΩ range verification
1. Connect the nominal 1 GΩ characterized resistor to the Model 6517B as shown in the figure in 2
TΩ to 200 TΩ range verification (on page 16-15).
Standard resistors must be characterized to an uncertainty at least four times better than the
equivalent Model 6517B accuracy specifications. These resistors must be mounted in specially
shielded test fixtures to minimize noise. See the "Shielded fixture construction" figure for details on
test fixture construction.
2. Select the ohms function.
3. Place the voltage source in operate.
4. Select the 2 GΩ range on the Model 6517B.
5. Make sure that zero check is disabled and allow the reading to settle.
6. Verify that the displayed reading is within the calculated reading limits listed in the "Limits for
ohms verification" table.
7. Repeat steps 4 through 6 for the 20 GΩ and 200 GΩ ranges.
8. Turn off the voltage source, then disconnect the standard resistor from the Model 6517B.
2 TΩ to 200 TΩ range verification
1. Connect the nominal 1 TΩ characterized resistor to the Model 6517B as shown in the figure
below.
Standard resistors must be characterized to an uncertainty at least four times better than the
equivalent Model 6517B accuracy specifications. These resistors must be mounted in specially
shielded test fixtures to minimize noise. See the "Shielded fixture construction" figure for details on
test fixture construction.
Hazardous voltage (400 V) is used in the following steps. Do not touch connecting cables or
test leads while the voltage source is in operate.
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