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Chapter 2 Service

About the HP 53181A Calibration Menu

To Change to New the Security Code

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

2Unsecure for calibration by the using the procedure described in the section titled “To Unsecure for Calibration.”

3Press Scale & Offset key until CODE: is displayed.

4Press the appropriate arrow keys to enter the new or customized security code, then press Enter key.

A scrolling message will appear, indicating what the new code is.

For example, the Counter displays the NEW CODE IS 5 if you entered “5” as the new code.

To View the Calibration Count

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

2Press Scale & Offset key until CAL COUNT? is displayed.

3Press any one of the entry keys (arrow, +/-, Enter) to have a scrolling message appear, indicating what the calibration count is.

Your Counter was calibrated before it left the factory. When you receive your Counter, read the calibration count to determine its initial value.

To Get Help with the Calibration Menu

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

2Press Scale & Offset key until HELP: CAL? is displayed.

3Press any one of the arrow keys until your help choice (that is,

HELP: CAL?, HELP: SECURE?, HELP: CODE?) is displayed.

4Press Enter key to display the help information.

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Assembly-Level Service Guide