Keithley 6517 - Meter Commands; Offset Commands

Calibration Command Reference
3-9
3.4 Meter commands
Meter commands include those necessary to null offsets and calibrate the volts, amps, and coulombs measurement functions.
3.4.1 Offset commands
:VOFF (:CALibration:UNPRotected:VOFFset)
Purpose
To null voltage offsets.
Format
:cal:unpr:voff
Parameter
None
Description
The :VOFF command performs voltage offset calibration and is normally used as part of the cal-
ibration procedure. :VOFF can also be sent during normal operation to null voltage offsets at
any time.
Programming Note
1. :VOFF is not protected by the CAL switch.
2. When :VOFF is used as part of the normal calibration procedure, voltage offset compensa-
tion constants are permanently saved. When :VOFF is sent during normal operation (with
calibration locked), voltage offset compensation is only temporary.
Example :CAL:PROT:VOFF Perform voltage offset calibration
:IOFF (:CALibration:UNPRotected:IOFFset)
Purpose To null bias current.
Format :cal:unpr:ioff
Parameter None
Description The :IOFF command performs bias current calibration and is normally used as part of the cali-
bration procedure. :IOFF can also be sent during normal operation to null bias current at any
time.
Programming Note 1. :IOFF is not protected by the CAL switch.
2. When :IOFF is used as part of the normal calibration procedure, bias current compensation
constants are permanently saved. When :IOFF is sent during normal operation (with calibra-
tion locked), bias current compensation is only temporary.
Example :CAL:PROT:IOFF Perform bias current calibration