Instruction manual

Chapter 2 Service
About the Agilent 53181A Calibration Menu
2-28 Assembly-Level Service Guide
2
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.