Model 6517B Electrometer Reference Manual Section 16: Verification procedure
6517B-901-01 Rev. C / August 2015 16-7
20 µA to 20 mA ranges
1. Connect the Model 6517B to the DC current calibrator as shown in DC voltage verification (on
page 16-4).
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 (on page 16-3).
4. Select the amps function and 20 µA range on the Model 6517B.
5. With zero check enabled, press REL to turn on the zero correct function.
6. Set the calibrator to 0.0 amps, then turn off zero check. Allow the reading to stabilize completely
before continuing.
7. Press REL to enable the Model 6517B REL function.
8. Set the calibrator to output +19.0 µA.
9. 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 following table.
10. Reverse the calibrator polarity, then verify the magnitude of the current reading is within the
specified limits.
11. Repeat steps 4 through 10 for the 200 µA, 2 mA, and 20 mA ranges.
Limits for 2 µA to 20 mA range verification
Model 6517B range Applied DC current
Reading limits
18 °C to 28 °C, 1 year
20 µA 19 µA 18.9805 µA to 19.0195 µA
200 µA 190 µA 189.805 µA to 190.195 µA
2 mA 1.9 mA 1.89800 mA to 1.90200 mA
20 mA 19 mA 18.9805 mA to 19.0195 mA
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