Agilent Technologies U1252B User's Manual And Service Manual page 156

6 Performance Tests and Calibration
N O T E
136
To unsecure the instrument without the security code
To unsecure the instrument without the correct security
code, follow the steps below.
If you do not have a record of the security code, you can try 1234 (the fac-
tory default code) using the front panel.
1 Record the last 4 digits of the multimeter's serial number.
2 Turn the rotary switch to
3 Press and
Calibration Security Code entry mode.
The primary display shows 5555 and the secondary
display shows SECUr.
4 Press for more than 1 second to enter the Set
Default Security Code mode. The secondary display shows
SEr.no and the primary display shows 5555.
5 Use the editing keys
character in the code.
6 Use and
7 Set the code, same as the last 4 digits of the instrument's
serial number.
8 Press (Save) to confirm the entry.
9 If the 4 digits entered are correct, the secondary display
will show PASS.
Now you can use 1234 as the security code. If you want to
enter a new security code, see
calibration security code from the front panel"
Make sure you record the new security code.
Agilent U1251B/U1252B User's and Service Guide
.
simultaneously to enter the
and to step each
to select each character.
"To change the instrument
on page 135.