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GOOD LABORATORY PRACTICE (GLP)
GLP is a set of functions that allows the storage and retrieval of data
regarding the maintenance and status of the electrode.
All data regarding the last calibration is stored for the user to review
when necessary.
EXPIRED CALIBRATION
These instruments allow the user to set the number of days before the
next required calibration. This value can be set from 1 to 7 days. The
default setting is OFF (disabled).
The “
CAL DUE
” tags will blink to warn the user that the instrument
should be recalibrated.
For example, if a 4 days time out has been selected, the instrument will
issue the alarm exactly 4 days after the last calibration.
If the expiration value is changed (e.g. to 5 days), then the alarm will
be immediately recalculated and appear 5 days after the last calibration.
Notes
: • If the instrument was not calibrated, or if the calibration
history was deleted, the “
CAL DUE
” message will be displayed even
if this feature is disabled in the SETUP menu.
• If the instrument was calibrated using an electrode with pin and
the electrode is changed with an electrode without pin or vice‑versa,
“
CAL DUE
”
will blink. This feature helps ensure use of a calibrated
instrument.
pH CALIBRATION DATA
Calibration data is stored automatically after a successful calibration.
To view the pH calibration data, press the
GLP
key when the instrument
is in pH measuring mode.
The instrument will display the time of the last calibration.
Use the
ARROW
keys to scroll through the calibration data:
• The time (hh:mm).
• The date (yyyy / mm.dd).