Operational Guide 33
Good Laboratory Practice (GLP) refers to a quality control function used to
ensure uniformity of sensor calibrations and measurements. The dedicated GLP
key opens a le of the latest calibration information. Use the qp keys to scroll
the stored information. This includes the time and date of the last calibration,
the sensor serial number and the o set. This information is also included with
every data log.
If calibration has not been performed, the instrument
displays a blinking “NO CAL” message.
The relative mV calibration o set is displayed on the
third LCD display.
Pressing the qp keys, the last calibration date (yyyy.
mm.dd) together with the current reading is displayed.
The time of the last calibration is displayed along with
the current reading.
Relative mV
GLP
Information
If the calculated o set is higher than ± 2000 mV the
“MAX LIMIT REACHED“ message will scroll on the third
LCD line. Until the error is eliminated the value cannot
be con rmed.
Press CFM to con rm the relative mV value. The display
will show “SAVING“ and returns to measurement
mode.
Note: The relative mV value can be changed only
inside the relative mV o set window (± 2000 mV).
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