Keithley DMM6500 Manual page 17

DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual
Verify dc voltage accuracy for the 100 mV to 1000 V ranges
To verify 100 mV to 1000 V dc voltage accuracies, you will:
•
Apply accurate dc voltages from the calibrator to the DMM6500 front-panel terminals.
•
Verify that the displayed readings are within specified limits.
•
Use the values in the tables following the steps below to verify the performance of the DMM6500.
Actual values depend on the published specifications (see
page 2-4)).
Use shielded low-thermal connections when testing the 100 mV and 1 V ranges to avoid errors
caused by noise or thermal effects. Connect the shield to the output LO terminal of the calibrator.
To verify dc voltage accuracy:
1. Use a low-thermal cable to connect the DMM6500 HI and LO INPUT terminals to the calibrator HI
and LO terminals as shown in the following figure.
DMM6500-905-01 Rev. E June 2021
Figure 1: DC voltage 100 mV to 1000 V ranges verification connections
Section 2: Performance verification
Example reading limit calculation (on
2-7