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Section 16: Verification procedure
2. Turn on the Model 6517B and allow it to warm up for at least two hours before making
measurements.
3. Restore the Model 6517B to factory default settings using the procedure described in the topic
Considerations
4. Select the amps function and the 20 pA range on the Model 6517B. Refer to
(on page 4-12) for more information.
5. With zero check enabled, press REL to turn on the zero correct function.
6. Set the calibrator to 0.0 V, and then turn off zero check. Allow the reading to stabilize completely
before continuing.
7. Press REL to enable the Model 6517B REL function.
8. Using the formula:
V =I R
calculate the actual calibrator voltage to achieve the desired current using the known value of the
precision resistors. Record the calibrator voltage.
9. Set the calibrator to the actual voltage. See the calibrator documentation for detailed instructions.
10. Make sure the calibrator is in operate.
11. Allow the reading to settle completely, and note the reading on the Model 6517B. Verify that the
reading is within the limits specified in the table below.
12. Reverse the calibrator polarity, and verify the magnitude of the current reading is within the limits.
13. Turn zero-check on.
14. Repeat steps 4 through 13 for the 200 pA to 2 µA ranges using the appropriate DC voltage and
standard resistor listed in the table below.
Reading limits for verification of 20 pA to 2 µA ranges
Model 6517B
range
20 pA
200 pA
2 nA
20 nA
200 nA
2 µA
16-6
(on page 16-3).
Nominal DC
Standard
voltage value
resistor value
1.9 V
100 GΩ
1.9 V
10 GΩ
1.9 V
1 GΩ
1.9 V
100 MΩ
19 V
100 MΩ
190 V
100 MΩ
Model 6517B Electrometer Reference Manual
Applied
Reading limits
current
18° C to 28° C, 1 year
19 pA
18.8070 pA to
19.1930 pA
190 pA
188.095 pA to
191.905 pA
1.9 nA
1.89590 nA to
1.91410 nA
19 nA
18.9615 nA to
19.0385 nA
190 nA
189.615 nA to
190.385 nA
1.9 µA
1.89800 µA to
1.90200 µA
6517B-901-01 Rev. C / August 2015
Amps configuration
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