User manual

1 Calibration Procedures
Unsecuring the Instrument for Calibration
20 U1271A/U1272A Service Guide
If the incorrect security code is entered, an error code
will appear at the secondary display briefly, after which
the calibration security code entry mode will appear
again.
Figure 1-5 Calibration security code operation
To change the calibration security code
1 After the instrument has been unsecured, press for
more than 1 second to enter the calibration security code
setting mode.
2 The factory default calibration security code “1234” will
be displayed on the primary display.
Wrong security code entered
Correct security code entered,
multimeter enters adjustment mode
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