170 U1253B User’s and Service Guide
6 Performance Tests and Calibration
Calibration count
The calibration count feature provides an independent
“serialization” of your calibrations. With it, you can
determine the number of times your instrument has been
calibrated. By monitoring the calibration count, you can tell
whether an unauthorized calibration has been performed.
The value will increment by one each time the instrument is
calibrated.
The calibration count is stored in a nonvolatile EEPROM
memory, the contents of which do not change even after the
instrument is switched off or after a remote interface reset.
Your U1253B true RMS OLED multimeter had been
calibrated before leaving the factory. When you receive your
multimeter, make sure to read the calibration count and
record it for maintenance purpose.
The calibration count increases up to a maximum of 65535,
after which it wraps around to 0. There is no way to
program or reset the calibration count. It is an independent
electronic “serialization” value.
To view the present calibration count, unsecure the
instrument from the front panel (see “Unsecuring the
instrument for calibration” on page 150), and then press
to view the calibration count. Press again to
exit the calibration count display.
To Next Page
Loading...
Need help?
General
