6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 3:
DMM6500-905-01 Rev. E June 2021 3-11
Prepare your DMM6500 for a rear-terminal adjustment with a 4-wire
short
To prepare the DMM6500 for rear-terminal adjustment:
1. Set the TERMINALS switch to REAR.
2. Install the Keithley Model 8610 or 8620 shorting plug on the rear 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 22: Connection for a rear-panel adjustment with a 4-wire short
3. Allow the DMM6500 to settle for five minutes.
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