Chapter 2 Service

The HP 53131A/132A Calibration Procedures

3 Press the appropriate arrow keys to enter the security code

53131”, for example, if 53131 is the security code by performing the following steps:

 

 

 

 

a.

Press g key four times.

 

 

 

 

 

The Counter should display CODE: 00000.

 

 

 

 

b.

Press d key five times.

 

 

 

 

 

 

 

 

 

The Counter should display CODE: 50000.

2

 

 

 

c.

Press g key once, and then press d key three times.

 

 

 

 

The Counter should display CODE: 53000.

 

 

 

 

 

 

 

 

 

d.

Press g key once, and then press d key once.

 

 

 

 

 

The Counter should display CODE: 53100.

 

 

 

 

 

 

 

 

 

e.

Press g key once, and then press d key three times.

 

 

 

 

 

The Counter should display CODE: 53130.

 

 

 

 

f.

Press g key once, and then press d key once.

 

 

 

 

 

The Counter should display CODE: 53131.

 

 

 

 

g.

Finally, press Enter key.

 

 

 

 

 

CAL UNSECURE is displayed.

 

 

 

 

 

 

 

NOTE

If “53131” is NOT the correct security code, the Counter will display

 

 

 

 

BAD CODE.

 

 

4 Press Scale & Offset key until CAL: OFFS 1 ? is displayed.

5

Press Enter key.

 

 

 

 

A scrolling message on the display will ask you to remove any signals

 

 

 

 

connected to Channel 1. Follow the instruction.

2-16

Assembly-Level Service Guide