Good Laboratory Practice (Glp) - Hanna Instruments HI 98188 Instruction Manual

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 EC and NaCl calibration is stored for the user to review
when necessary.
EXPIRED CALIBRATION
The instrument is provided with a real time clock (RTC), in order to monitor the
time elapsed since the last EC/NaCl calibration.
The real time clock is reset every time the instrument is calibrated and the
"expired calibration" status is triggered when the instrument detects a
calibration time out. The "CAL" "DUE" tags will start blinking to warn the
user that the instrument should be recalibrated.
The calibration time out can be set (see SETUP for details, page 35) from 1 to
7 days or can be disabled.
For example, if a 4 days time out has been selected, the instrument will issue
the alarm exactly 4 days after the last calibration.
However, if at any moment 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" "DUE" tags blinking.
• When an abnormal condition in the RTC is detected, the instrument
forces the "expired calibration" status.
LAST EC CALIBRATION DATA
The last pH calibration data is stored automatically after a successful calibration.
To view the EC calibration data, press GLP when the instrument is in the EC
measurement mode.
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