Keithley 2425 Service Manual page 119

B-4 Command Reference
:LOCK
(:CALibration:PROTected:LOCK)
Purpose
Format
Query
Response
Description
Note
Example
:SAVE
(:CALibration:PROTected:SAVE)
Purpose
Format
Description
Note
Example
To lock out calibration.
:cal:prot:lock
:cal:prot:lock?
0 Calibration unlocked
1 Calibration locked
The :LOCK command allows you to lock out comprehensive calibration
after completing those procedures. Thus, :LOCK performs the opposite of
sending the password with the :CODE command. The :LOCK? query returns
calibration lock status.
To unlock calibration, send the :CODE command with the appropriate
password.
:CAL:PROT:LOCK
To save calibration constants in EEROM after the calibration procedure.
:cal:prot:save
The :SAVE command stores internally calculated calibration constants
derived during comprehensive calibration in EEROM. EEROM is non-vola-
tile memory, and calibration constants will be retained indefinitely once
saved. Generally, :SAVE is sent after all other calibration steps (except for
:LOCK).
Calibration will be only temporary unless the :SAVE command is sent to
permanently stored 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).
:CAL:PROT:SAVE
Model 2425 Service Manual
Lock out calibration
Save calibration constants