Keithley 2700, Service Manual

Page: 156 / 174

B-20 Calibration Reference
:SAVE
(:CALibration:PROTected:CARD1:SAVE)
Purpose
To save calibration constants in card EEROM after the calibration
procedure.
Format
:cal:prot:card1:save
Parameter
None
Description
The
:SAVE
command stores calculated calibration constants derived dur-
ing Model 7700 calibration in card EEROM. (EEROM is non-volatile mem-
ory.) Calibration constants will be retained indefinitely once saved.
Generally,
:SAVE
is sent after all other calibration steps (except for
:LOCK
).
NOTE Card calibration will be only temporary unless the
:SAVE
command is sent to per-
manently store calibration constants.
Example
:CAL:PROT:CARD1:SAVE
Save card calibration constants.
:STEP0
(:CALibration:PROTected:CARD1:STEP0)
Purpose
To perform Model 7700 calibration.
Format
:cal:prot:card1:step0 <temp>
Parameter
<temp> = Cold calibration temperature (˚C)
Description
:STEP0
performs temperature sensor calibration of the Model 7700. The
card must be allowed to cool down to ambient temperature before calibra-
tion, and the cold temperature of the card must be measured and sent as the
<temp> parameter during calibration.
NOTE Before calibrating the Model 7700, make sure that power has been removed from the
card for at least two hours to allow card circuitry to cool down. After turning on the
power during the calibration procedure, complete the procedure as quickly as possi-
ble to minimize card heating that could affect calibration accuracy.
Example
:CAL:PROT:CARD1:STEP0 23
Perform 7700 calibration.