Calibration Procedures 1
Keysight U1281A/U1282A Service Guide 55
Calibration Count
You can query the multimeter to determine how many adjustments have been
performed.
The calibration count feature provides independent serial numbers of your
calibrations. You can determine the number of times that your multimeter has
been calibrated. By monitoring the calibration count, you can determine if an
unauthorized calibration has been performed. The value is increased by one for
each calibration.
The calibration count is stored in nonvolatile memory, and does not change on
power on/off or after a remote interface reset. Your multimeter was calibrated
before it left the factory. When you receive your multimeter, take note of the
calibration counts as a record for maintenance.
The calibration count increases by one for each calibration point, from up
to the maximum . Once the calibration count reaches , the
calibration count will reset to . The calibration count can be read after the
multimeter has been unsecured. The calibration count cannot be programmed or
reset. It is an independent electronic calibration serial value.
1 Press for more than 1 second in adjustment mode to view the
calibration count.
2 Take note of the calibration count to keep track of the number of calibrations
that have been performed.
3 Press for more than 1 second to exit the calibration count mode.
The multimeter has been calibrated before it left the factory. You are
recommended to record the initial value of the calibration count once you
receive the multimeter.
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