Calibration Procedures 1
Keysight U1270 Series Service Guide 35
Calibration Security
The calibration security code prevents accidental or unauthorized 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 36).
The security code is set to “1234” when the instrument is shipped from the
factory. The security code is stored in nonvolatile memory, and does not change
when power has been turned off.
The security code may contain up to four numeric characters.
The security code can only be changed after the instrument has been unsecured.
You can unsecure the instrument from its front panel.
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