HP E1313A Manual page 83

When to Re-Execute
*CAL?
Note
82 Using the HP E1313/E1413
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When *CAL? finishes, it returns a +0 value to indicate success. The
generated calibration constants are now in volatile memory as they always
are when ready to use. If the configuration just calibrated is to be fairly
long-term, you should now execute the
to store these constants in non-volatile memory. That way the module can
restore calibration constants for this configuration in case of a power failure.
After power returns, and after the module warms up, these constants will be
relatively accurate.
•
When you change the channel gain and/or filter cut-off frequency on
programmable SCPs (using
commands).
•
When you reconfigure SCPs to different locations. This is true even
if you replace an SCP with an identical model SCP because the
calibration constants are specific to each SCP channel's individual
performance.
•
When the ambient temperature within the mainframe changes
significantly. Temperature changes affect accuracy much more than
long-term component drift.
To save time when performing channel calibration on multiple
HP E1313/E1413s in the same mainframe, use the
commands (see these commands in Chapter 5 for details).
CAL:SETup?
CALibration:STORe ADC
or
INPut:GAIN INPut:FILTer:...
CAL:SETup
command
and
Chapter 3