Calibration Procedures 1
Keysight U1281A/U1282A Service Guide 41
To change the calibration security code
This feature allows you to enter a security code to prevent accidental or
unauthorized calibration of the meter. The meter will be secured automatically
after power off. Ensure you unsecure the meter by entering the correct security
code before you adjust or calibrate the multimeter.
1 Press for more than 1 second after unsecuring the multimeter. The
previously saved security code is shown on the display. If you are changing the
calibration security code for the first time or if you have reset the security code
to its factory default, is shown on the display
2 Set your new calibration security code by entering any four digits ranging from
to .
– Press or on to move the cursor to the left or to the right.
– Press or to increment or decrement the digit.
3 Press to save the new calibration security code.
If the new calibration security code has been successfully stored, the display
will show .
4 Record down your new calibration security code, and store it in a safe location.
See Figure 1-6 for the multimeter display.
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