Keithley SourceMeter 2430, Service Manual

Page: 120 / 141

B-4 Command Reference
Description
The :LOCK command allows you to lock out comprehensive calibration af-
ter completing those procedures. Thus, :LOCK performs the opposite of
sending 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 de-
rived during comprehensive calibration 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 stored calibration constants. Calibration data will not be saved
if: (1) calibration was not unlocked by sending the :CODE command, (2) in-
valid data exists (for example, cal step failed or was aborted.), or (3) an in-
complete number of cal steps were performed (for example, omitting a
negative full-scale step).
Example
:CAL:PROT:SAVE
Save calibration constants
:DATE
(:CALibration:PROTected:DATE)
Purpose
To program the calibration date.
Format
:cal:prot:date <year>, <month>, <day>
Parameters
<year> = 1994 to 9999
<month> = 1 to 12
<day> = 1 to 31
Query
:cal:prot:date?
Response
<year> , <month> , <day>
Description
The :DATE command allows you to store the calibration date in instrument
EEROM for future reference. You can read back the date from the instrument
by using the :DATE? query, or by using the front panel CAL menu.
Note
The year, month, and day parameters must be delimited by commas.
Example
:CAL:PROT:DATE 1999,7,20
Send cal date (7/20/99).