Chapter 2 Service
About the HP 53181A Calibration Menu
Assembly-Level Service Guide 2-29
2
To Initiate the Calibration Routines
1 Press and hold Scale & Offset key, then cycle POWER key.
2 Unsecure for calibration by performing the preceding procedure.
3Press Scale & Offset key until
CAL: OFFS1?
is displayed.
4 Press any one of the arrow keys until your calibration choice
(that is,
CAL: GAIN 1?
, or
CAL: TIMEBAS?
) is displayed.
Note that the timebase choice (CAL: TIMEBAS?) only appears when the
Timebase Option is installed.
5Press Enter key.
A scrolling message is displayed.
6 Follow the instructions in the scrolling message, and press Enter
key to start the calibration.
The Counter momentarily displays
CALIBRATING
, and then displays the
calibration test name and pass/fail status (for example,
OFFS 1 PASS
).
When the calibration completes, a pass/fail message will be displayed.
If the calibration failed, then the calibration factors remain unchanged.
To Secure Against Calibration
1 Press and hold Scale & Offset key, then cycle POWER key.
CAL UNSECURE
is displayed. If
CAL SECURE
is displayed, then the
Counter is already secured against calibration and the remaining steps
are not applicable.
2Press Scale & Offset key until
CODE:
is displayed.
3 Press the appropriate arrow keys to enter the security code, then
press Enter key.
CAL SECURE
is displayed.
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