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Chapter 2 Service

About the Agilent 53181A Calibration Menu

2-28 Assembly-Level Service Guide

To View the Calibration Menu and Security Status

The Calibration menu is accessed by holding the Scale & Offset key and cycling the

POWER key. The first item in the Calibration menu is a message indicating the

calibration security status: CAL SECURE or CAL UNSECURE.

To Unsecure for Calibration

1 Press and hold Scale & Offset key, then cycle POWER key.

CAL SECURE is displayed.

If CAL UNSECURE is displayed, then the Counter is already unsecured for

calibration, and the remaining steps are not applicable.

2 Press Scale & Offset key until CODE: is displayed.

3 Press the appropriate arrow keys to enter the security code “53181”, for example,

if 53181 was the security code set at the factory.

4 Press Enter key.

CAL UNSECURE is displayed.

NOTE If “53181” was NOT the correct security code, the Counter would have displayed

BAD CODE.

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Agilent Technologies HP 3325B Bedienerhandbuch Seite 126