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2308-900-01 Rev. A / July 2008
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Section Topics
B-5
Model 2308 Portable Device Battery/Charger Simulator User’s Manual
Appendix B: Calibration Reference
: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. :SAVE is sent after
all other calibration steps.
Example
:CAL:PROT:SAVE
Save calibration constants
:STEP
(:CALibration:PROTected:STEP<n>)
Purpose
To perform various calibration steps.
Format
:cal:prot:step<n>
Parameters
See
Table B-1
.
Description
The :CAL:PROT:STEP<n> command performs calibration at the various points
listed in
Table B-2
. See
Section 13
for details on test equipment and connections.
Example
:CAL:PROT:STEP0 14
Perform cal step 0 (Ch. 1 full-scale output).
Detecting calibration errors
If an error occurs during any calibration step, the Model 2308 will generate an appropriate error
message. Several methods to detect calibration errors are discussed below.
Reading the error queue
As with other Model 2308 errors, any calibration errors will be reported in the error queue. Use the
:SYST:ERR?
query to read the error queue.
Error summary
Table B-2
summarizes calibration errors.
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).
3. An incomplete number of cal steps were performed.
4. Calibration was performed out of sequence.
NOTE
Calibration steps must be performed in the order listed in
Table B-2
, or an error
will occur.
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