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IEEE-488.2 Common Command Reference
*CAL?
Note
Chapter 6
*CAL?
Calibration command. The calibration command causes the Channel
Calibration function to be performed for every module channel. The Channel
Calibration function includes calibration of A/D Offset, and Gain and Offset for all
64 channels. This calibration is accomplished using internal calibration references.
The *CAL? command causes the module to calibrate A/D offset and gain, and all
channel offsets. This may take many minutes to complete. The actual time it will take
your HP E1415 to complete *CAL? depends on the mix of SCPs installed. *CAL
performs literally hundreds of measurements of the internal calibration sources for
each channel and must allow 17 time constants of settling wait each time a filtered
channel's calibrations source value is changed. The *CAL procedure is internally
very sophisticated and results in an extremely well calibrated module.
To perform Channel Calibration on multiple HP E1415s, use CAL:SETup.
•
Returned Value:
Value
0
-1
The C-SCPI type for this returned value is int16.
•
Related Commands: CALibration:SETup, CALibration:SETup?,
CALibration:STORe ADC
•
CAL:STOR ADC stores the calibration constants for *CAL? and CAL:SETup
into non-volatile memory.
•
Executing this command does not alter the module's programmed state
(function, range, etc.). It does however clear STAT:QUES:COND? register bit
13.
If Open Transducer Detect (OTD) is enabled when *CAL? is executed, the module
will disable OTD, wait 1 minute to allow channels to settle, perform the calibration,
and then re-enable OTD. If your program turns off OTD before executing *CAL?, it
should also wait 1 minute for settling.
Meaning
Cal OK
Cal Error
Query the Error Queue (SYST:ERR?)
See Error Messages in Appendix B
•When Accepted: Not while INITiated
HP E1415 Command Reference
Further Action
None
page 335
287
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