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Chapter 2 Service
The HP 53131A/132A Calibration Procedures
2-16 Assembly-Level Service Guide
2
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
Ł
key four times.
The Counter should display
CODE: 00000
.
b. Press
ł
key five times.
The Counter should display
CODE: 50000
.
c. Press
Ł
key once, and then press
ł
key three times.
The Counter should display
CODE: 53000
.
d. Press
Ł
key once, and then press
ł
key once.
The Counter should display
CODE: 53100
.
e. Press
Ł
key once, and then press
ł
key three times.
The Counter should display
CODE: 53130
.
f. Press
Ł
key once, and then press
ł
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
.
4Press Scale & Offset key until
CAL: OFFS 1 ?
is displayed.
5Press Enter key.
A scrolling message on the display will ask you to remove any signals
connected to Channel 1. Follow the instruction.