Chapter 2 Service
About the HP 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.
Summary of Contents for 53131A
Page 1: ...Assembly Level Service Guide HP 53131A 132A 181A 225 MHz Counter ...
Page 2: ......
Page 14: ...Contents xii Assembly Level Service Guide ...
Page 22: ...Preface xx Assembly Level Service Guide ...
Page 23: ...1 Performance Tests Verifying Specifications ...
Page 97: ...2 Service ...
Page 149: ...3 Replacing Assemblies Disassembly and Reassembly ...
Page 173: ...4 Retrofitting Options ...
Page 191: ...5 Replaceable Parts ...
Page 201: ...6 Backdating Manual Changes ...
Page 218: ...Chapter 6 Backdating Backdating Specifications 6 18 Assembly Level Service Guide 6 ...
Page 219: ...7 HP 53131A 132A Specifications ...
Page 235: ...8 HP 53181A Specifications ...
Page 246: ...Chapter 8 HP 53181A Specifications General Information 8 12 Assembly Level Service Guide 8 ...
Page 252: ......
Page 254: ... Manual Part Number 53131 90039 Printed in U S A MARCH 1999 ...