Keithley SourceMeter 2400, Service Manual, Page: 114 / 137

B-4 Command Reference
:LOCK
(:CALibration:PROTected:LOCK)
Purpose
To lock out calibration.
Format
:cal:prot:lock
Query
:cal:prot:lock?
Response
0 Calibration unlocked
1 Calibration locked
Description
The :LOCK command lets you lock out comprehensive calibration after
completing those procedures. Thus, :LOCK performs the opposite of send-
ing the password with the :CODE command. The :LOCK? query returns
calibration lock status.
Note
To unlock calibration, send the :CODE command with the appropriate pass-
word.
Example
:CAL:PROT:LOCK
Lock out calibration
:SAVE
(:CALibration:PROTected:SAVE)
Purpose
To save calibration constants in EEROM after the calibration procedure.
Format
:cal:prot:save
Description
The :SAVE command stores internally calculated calibration constants
derived during comprehensive in EEROM. EEROM is non-volatile memory,
and calibration constants will be retained indefinitely once saved. Generally,
:SAVE is sent after all other calibration steps (except for :LOCK).
Note
Calibration will be only temporary unless the :SAVE command is sent to
permanently store calibration constants. Calibration data will not be saved
if: (1) calibration was not unlocked by sending the :CODE command, (2)
invalid data exists (for example, cal step failed or was aborted), or (3) an
incomplete number of cal steps were performed (for example, omitting a
negative full-scale step).
Example
:CAL:PROT:SAVE
Save calibration constants