HP manual HP 53181A Calibration Procedures, To Calibrate the Offset for Channel

Chapter 2 Service

The HP 53181A Calibration Procedures

	The HP 53181A 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.
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 2-29 of this chapter.

To Calibrate the Offset for Channel 1

1To 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.

3Press the appropriate arrow keys to enter the security code

“53181”, for example, if 53181 is the security code by performing the following steps:

a.Press key four times.

The Counter should display CODE: 00000.

b.Press key five times.

The Counter should display CODE: 50000.

Assembly-Level Service Guide 2-31

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