Hanna Instruments HI 2002, Instruction Manual, Page: 39 / 52

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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 file of the latest calibration
information. Use the
keys to scroll the stored information. This includes the time and date of
the last calibration, the sensor serial number and the offset. 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 offset is displayed on the third LCD display.
Pressing the keys, the last calibration date (yyyy.mm.dd)
together with the current reading is displayed.
Press GLP/CFM key to confirm 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 offset window (± 2000 mV).
OPERA
TIONAL GUIDE
RELATIVE mV GLP INFORMATION
The time of the last calibration is displayed along with the current
reading.