1 Calibration Procedures
38 Keysight U1281A/U1282A Service Guide
Unsecuring the Multimeter for Calibration
Before you can adjust the multimeter, you must unsecure it by entering the
correct security code.
The default security code is set to .
To unsecure the multimeter
1 Press and together for more than 1 second during normal
operation mode to enter unsecured mode.
The calibration security code entry is shown on the display.
Figure 1-4 Calibration security code entry display
2 Key in your security code.
– Press or on to move the cursor to the left or to the right.
– Press or to increment or decrement the digit.
If you forget your security code, see “To reset the calibration security code to its
factory default” on page 43.
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