Keithley SourceMeter 2425, Service Manual, Page: 61 / 141

2-26 Calibration Model 2425 Service Manual
Step 5: Save calibration constants.
Calibration is now complete, so you can store the calibration constants in EEROM by
sending the following command:
:CAL:PROT:SAVE
NOTE Calibration will be temporary unless you send the SAVE command. Also,
calibration data will not be saved if (1) calibration is locked, (2) invalid data
exists, or (3) all steps were not completed.
Step 6: Lock out calibration.
To lock out further calibration, send the following command after completing the calibra-
tion procedure:
:CAL:PROT:LOCK
Single-range calibration
Normally, the complete calibration procedure should be performed to ensure that the
entire instrument is properly calibrated. In some instances, however, you may want to
calibrate only certain ranges. To do so, complete the entire procedure only for the range(s)
to be calibrated. Keep in mind, however, that you must complete all parameter steps for
each source or sense range. Also be sure to set calibration dates and save calibration after
calibrating the desired range(s).