Model 6517B Electrometer Reference Manual Section 16: Verification procedure
6517B-901-01 Rev. C / August 2015 16-5
Limits for DC voltage verification
Calibrator output Model 6517B range
Allowed reading range
18° C to 28° C, 1 year
+1.9 V 2 V +1.89949 V to +1.900515 V
-1.9 V 2 V -1.900515 V to -1.89949 V
+19 V 20 V +18.9950 V to +19.0050 V
-19 V 20 V -19.0050 V to -18.9950 V
+190 V 200 V +189.883 V to +190.117 V
-190 V 200 V -190.117 V to -189.883 V
Allowed reading limits are calculated from the Model 6517B one year uncertainty, and do not include
test equipment uncertainties.
DC amps verification
The DC amps verification procedure is performed by applying known currents to the Model 6517B
input, and verifying that the reading falls within acceptable limits. There are two procedures used. The
procedure for the 20 pA to 2 µA ranges uses a DC voltage calibrator and precision resistors; the
procedure for the 20 µA to 20 mA ranges uses a DC current calibrator.
20 pA to 2 µA ranges
To verify the current ranges from 20 pA to 2 µA:
1. Connect the Model 6517B according to the figure below using the corresponding standard
resistor value from the table at the end of this topic.
Figure 136: Model 6517B 20 pA to 2 µA current range verification configuration
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