138 Agilent U1251A/U1252A User’s and Service Guide
7 Performance Tests and Calibration
Calibration Security
The calibration security code prevents accidental or unau-
thorized adjustments to the instrument. When you first
receive your instrument, it is secured. Before you can adjust
the instrument, you must unsecure it by entering the correct
security code (see “Unsecuring the Instrument for
Calibration” on page 139).
The security code is set to 1234 when the instrument is
shipped from the factory. This code is stored in non- volatile
memory, and does not change when power is turned off .
The security code may contain up to 4 numeric characters.
You can unsecure the instrument from the front panel. The security code
can only be changed from the front panel and from the remote interface
after the instrument has been unsecured.
See “To Unsecure the Instrument Without the Security Code” on page 141
if you forget your security code.
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