1
Calibration Procedures
40
Keysight U1241C/U1242C Service Guide
To reset the calibration security code to its factory default
If you have forgotten the correct calibration security code, you may follow the
steps below to reset the calibration security code to the factory default code,
.
1
Note down the last four digits of the multimeter’s serial number (located at the
bottom of the rear panel) before you begin.
2
Press both
and
together for more than 1 second during
normal operation mode to enter unsecured mode.
will be displayed.
3
Press
for more than 1 second to enter the Default Security Code
(dSC) mode.
4
Enter the last four digits of the multimeter’s serial number.
– Press
or
to move the cursor to the left or right
respectively.
– Press
or
to increment or decrement the digit respectively.
5
Press
to confirm your entry.
– If the four digits entered are correct, the display will show
briefly.
The calibration security code is now set to its factory default code,
.
– 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.
– To enter a new security code, see
“To change the calibration security code”
on page 38. Ensure that you record down the new security code.
for the multimeter’s display.
NOTE
If you do not have a record (or have lost the record) of the security code, first try
the factory default code,
.
Hold
Log
Shift
Esc
View
Shift
Esc
View
Hz
MaxMin
Range
Auto
Vsense
Hold
Log