Keithley DMM6500 Manual page 72

Section 3: Adjustment DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual
Prepare your DMM6500 for a front-terminal adjustment with a 4-wire
short
To prepare the DMM6500 for a front-terminal adjustment with a 4-wire short:
1. Set the TERMINALS switch to FRONT.
2. Install the Keithley Model 8610 or 8620 shorting plug on the front terminals of the DMM6500 as
shown in the figure below.
The shorting plug terminals must be connected so that HI and LO are correctly aligned. Zero
accuracy will be affected if the shorting plug terminals are not aligned correctly.
Figure 21: Connection for a front-panel adjustment with a 4-wire short
3. Allow to settle for five minutes.
3-8 DMM6500-905-01 Rev. E June 2021