1
Calibration Procedures
38
Keysight U1241C/U1242C Service Guide
To change the calibration security code
This feature allows you to enter a security code to prevent accidental or
unauthorized calibration of the multimeter. The multimeter will be secured
automatically after power off. Ensure you unsecure the multimeter by entering the
correct security code before you adjust or calibrate the multimeter.
1
Press
for more than 1 second to enter the Changing Security Code
(CSC) mode while the multimeter is unsecured (rEF mode).
will be shown
as the existing security code.
2
Set your new calibration security code by entering any four digits ranging from
to
.
– Press
or
to move the cursor to the left or right
respectively.
– Press
or
to increment or decrement the digit respectively.
3
Press
to save the new calibration security code.
If the new calibration security code has been successfully changed,
will
appear briefly, after which the multimeter will enter the adjustment mode.
If the incorrect security code is entered, an error code will appear briefly, after
which the multimeter will prompt you for the security code again.
4
Press
for more than 1 second again if you wish to discard the change.
5
Record down your new calibration security code and store it in a safe location.
6
Exit the unsecured mode by pressing both
and
together for
more than 1 second to secure the multimeter again.
for the multimeter’s display.
Shift
Esc
View
Hz
MaxMin
Range
Auto
Vsense
Hold
Log
Shift
Esc
View
Hold
Log
Shift
Esc
View