Adjustment Procedures 3
Keysight 3458A Calibration Manual 41
Rear Terminal Offset Adjustment
This adjustment compensates for internal offset errors for rear terminal
measurements.
1 Connect the 4-terminal short to the rear terminals.
2 Set the front panel Terminals switch to Rear.
3 After connecting the 4-terminal short, allow 5 minutes for thermal equilibrium.
4 Execute the CAL 0 command. The multimeter automatically performs the rear
terminal offset adjustment and the display shows each of the various steps
being performed. This adjustment takes about 5 minutes. When the
adjustment is complete, the multimeter returns to displaying DC voltage
measurements.
5 Remove the 4-terminal short from the rear terminals.
Take precautions to prevent thermal changes near the 4-wire short. You should
not touch the short after it is installed. If drafts exist, you should cover the input
terminals/short to minimize the thermal changes.
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