Dc Current Verification - Keithley DMM7510 Calibration Manual

Model DMM7510 7½ Digit Graphical Sampling Multimeter Calibration Manual

DC current verification

For DC current verification, you use different connections and procedures to test the 10 µA and
100 µA ranges, 1 mA and 10 mA, and the 100 mA to 3 A ranges.
DC current 10 µA and 100 µA range verification
To verify DC current accuracy for the 10 µA to 100 µA ranges, you will:
•
Apply accurate DC voltage from the calibrator through a precision shunt resistor to the Model
DMM7510 front terminals.
•
Sense the voltage across the shunt with a reference DMM.
•
Verify that the readings displayed on the Model DMM7510 fall within the calculated reference
DMM voltage and precision shunt limits.
Configuring DC current for the 10 µA and 100 µA ranges:
1. Set up the Model DMM7510 for DC current and the range being tested.
2. Make sure relative offset is disabled.
3. Verify shunt. With a shunt characterization of 200 kΩ parallel 10 MΩ, the reference DMM typical
measurement is 196.07843 kΩ.
DMM7510-905-01 Rev. A / April 2015
Figure 7: Connections for the 10 µA and 100 µA shunt characterization
Section 2: Performance verification
2-45