Performance Tests and Calibration 6
U1253B User’s and Service Guide 151
4 Press or to start entering the code (by editing the
existing number “5555” one digit at a time).
5 Press or to choose which digit to edit, and press
or to edit the value.
6 Press (Save) when done.
7 If the correct security code is entered, the upper left
corner of the secondary display will show the word
“PASS” for 3 seconds.
8 If the incorrect security code is entered, an error code
will be displayed instead for 3 seconds, after which the
Calibration Security Code entry mode will appear again.
Please refer to Figure 6- 4 on page 152.
To secure the instrument again (exit the unsecured mode),
press and simultaneously.
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