In this section:
Introduction .............................................................................. 4-1
Unlocking calibration for adjustment ........................................ 4-1
Changing the password ........................................................... 4-2
Resetting the calibration password .......................................... 4-3
Querying calibration and adjustment dates and count ............. 4-3
Adjustment errors ..................................................................... 4-3
Remote adjustment .................................................................. 4-4
Remote adjustment procedure ................................................. 4-7
Single-range adjustment ........................................................ 4-18
Introduction
Use the procedures in this section to adjust the Model 2461. These procedures require accurate test
equipment to measure precise DC voltages and currents. Adjustment can be completed either from
the front panel or by sending SCPI calibration adjustment commands over the IEEE-488, USB, or
LAN port using a computer. This manual describes using SCPI commands from a remote interface to
adjust the instrument.
The information in this section is intended for qualified service personnel only. Do not
attempt these procedures unless you are qualified to do so. Some of these procedures may
expose you to hazardous voltages, which could cause personal injury or death if contacted.
Use appropriate safety precautions when working with hazardous voltages.
Unlocking calibration for adjustment
Before adjusting the Model 2461, you must unlock the calibration constants by entering or sending a
password using the following command (
KI002400
is the default password; if you have changed
your password, use it instead):
CALibration:UNLock "KI002400"
When calibration constants are unlocked, the instrument is in the state shown in the following table. If
you try to change any of these settings with calibration unlocked, error +510, “Not permitted with cal
unlocked” is returned.
Section 4
Adjustment
