Adjustment Count - Keysight U1211A User's And Service Manual

6 Performance Tests and Calibration

Adjustment count

The adjustment count feature provides an independent "serialization" of your
adjustments. With it, you can determine the number of times your instrument has
been adjusted. By monitoring the adjustment count, you can tell whether an
unauthorized adjustment has been performed. The value increments by one each
time instrument is adjusted.
The adjustment count is stored in a non-volatile EEPROM memory, the contents
of which do not change even after the instrument is switched off. Your clamp
meter had been adjusted before leaving the factory. When you receive your clamp
meter, make sure to read the adjustment count for the first time and record it for
maintenance purpose.
The adjustment count increases up to a maximum of 9999, after which it wraps
around to 0. There is no way to program or reset the adjustment count. It is an
independent electronic "serialization" value.
To view the present adjustment count, unsecure the instrument (see
the instrument for calibration"
than 1 second to view the adjustment count. Press Shift/Peak for more than 1
second again to exit the adjustment count display.
Figure 6-4
114
Press for
> 1 second
Displaying adjustment counts
Keysight U1211A, U1212A, and U1213A User's and Service Guide
on page 97), and then press Shift/Peak for more
"Unsecuring