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Chapter 2 Service
The HP 53131A/132A Calibration Procedures
Assembly-Level Service Guide 2-15
2
The HP 53131A/132A Calibration Procedures
First Determine the Counter Firmware Revision
Press and hold Recall (Utility) key, then cycle POWER key.
REV: n
is displayed; where “n” represents the numeric firmware revision
code.
If 3317, 3335, or 3402 is displayed as the firmware revision code, then
perform the calibration procedures in Chapter 6, “Backdating.”
If the Counter’s firmware revision code is higher than the ones in the
previous paragraph, then perform the following procedures in this section.
NOTE
After completing the instrument calibration, BE SURE to secure the
calibration by performing the procedure in the section titled “To Secure
Against Calibration” on page 2-13 of this chapter.
To Calibrate the Offset for Channels 1 and 2
1 To access the Calibration menu, power down, and press and hold
the Scale & Offset key, then press POWER key.
The first item in the Calibration menu is a message indicating the
calibration security status:
CAL SECURE
or
CAL UNSECURE
.
The Counter calibration must be unsecured to perform calibration.
If
CAL UNSECURE
is displayed, the Counter is already unsecured for
calibration; go to step 5. However, if
CAL SECURE
is displayed then
perform steps 2 through 4 to unsecure calibration.
2Press Scale & Offset key until
CODE: 0
is displayed.