1
Calibration Procedures
34
Keysight U1241C/U1242C Service Guide
Calibration Security
The calibration security code prevents accidental or unauthorized adjustments to
the multimeter. When you first receive your multimeter, it is secured.
Before you can adjust the multimeter, you must unsecure it by entering the
correct security code. See
“Unsecuring the Multimeter for Calibration”
The security code is set to
when the multimeter is shipped from the factory.
The security code is stored in nonvolatile memory, and does not change when
power has been turned off or after a remote interface reset. The security code may
contain up to four numeric characters.
NOTE
The security code can only be changed after the multimeter has been
unsecured. You can unsecure the multimeter from its front panel.