Keysight U1241B - Calibration Security Management

5 Performance Tests and Calibration
70 Keysight U1241B and U1242B User’s and Service Guide
Calibration Security
The calibration security code prevents accidental or unauthorized adjustments to
the multimeter. The multimeter is secured when the multimeter is shipped from
factory. Before performing any adjustment to the multimeter, you are required to
unsecure the multimeter by entering the correct security code (see Unsecuring
the Multimeter for Calibration). The security code may contain up to 4 numeric
characters.
Unsecuring the Multimeter for Calibration
Before performing adjustment to the multimeter, you are required to unsecure the
multimeter by entering the correct security code. The security code is set to 1234
when the multimeter is shipped from the factory. The security code is stored in
non-volatile memory, and does not change when power is off.
Unsecuring the Multimeter from the Front Panel
1 Turn the rotary switch to .
2 Press and simultaneously to enter the Calibration Security
Code entry mode. The primary display shows 5555 and the secondary display
shows SEU.
3 Press or to step each character in the code. Press or
to change the value of the selected character.
4 Press (Save) when done.
5 If the correct security code is entered, the secondary display will show “PAS”. If
an invalid code is entered, the multimeter will shows error code “E02” on the
secondary display for approximately 3 seconds and return to the Calibration
Security entry mode.
NOTE
You can unsecure and change the security code from the multimeter front panel.
If you forget your security code, see Unsecuring the Multimeter Without the
Security Code.