Hanna Instruments HI 2214 - Manual (Page 17)

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GOOD LABORATORY PRACTICE (GLP) GOOD LABORATORY PRACTICE (GLP) GOOD LABORATORY PRACTICE (GLP) GOOD LABORATORY PRACTICE (GLP) GOOD LABORATORY PRACTICE (GLP)
GLP is a set of functions that allows storage and retrieval of data
regarding the maintenance and status of the electrode.
All data regarding pH or Rel mV 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” “INTV” tags will start blinking
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: • When the instrument is not calibrated or calibration is cleared
(default values loaded) there is no “expired calibration”, and
the display always shows the “
CAL” “INTV” tags blinking.
• When an abnormal condition in the RTC is detected, the
instrument forces the “expired calibration” status.
pH CALIBRATION DATA
Calibration data is stored automatically after a successful calibration.
To view the pH calibration data, press GLP while in measurement mode.
The instruments will display the time (hh:mm) of the last calibration.
Use the ARROW keys to scroll through the calibration data:
• The date (yyyy.mm.dd).