Keithley DMM6500

Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 2: Performance verification
DMM6500-905-01 Rev. A/July 2018 2-19
Figure 8: Connections for 4-wire RTD accuracy verification
2. For 3-wire accuracy, connect the DMM6500 INPUT and SENSE terminals to the calibrator as
shown in the following figure.
The SENSE HI wire is not required for 3-wire RTD measurements. For 3-wire RTD, accuracy is for
< 0.1 Ω lead resistance mismatch for input HI and LO. Add 0.25 °C per 0.1 Ω of HI-LO lead
resistance mismatch.
Figure 9: Connections for 3-wire RTD accuracy verification