User manual

1 Calibration Procedures
Calibration Security
18 U1271A/U1272A Service Guide
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 19).
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 4 numeric characters.
NOTE
The security code can only be changed after the instrument has been
unsecured. You can unsecure the instrument from its front panel.