Hanna-instruments HI 254 Uživatelský manuál Strana 12

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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 the last calibration (one, two, three, four or five-point) is
stored for the user to review when necessary. This data includes the following:
calibration time stamp, offset (mV), average of slope (%), calibration buffers
and the time until a new calibration is required.
CALIBRATION ALARM TIME-OUT
HI 254 allows 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 instrument checks if the time-out time has expired. If the time elapsed, the
CAL INTV tags will blink as a reminder.
Note: If the instrument was not calibrated, the CAL INTV tags will be
displayed even if the feature is disabled in SETUP menu.
LAST CALIBRATION DATA
Last calibration data is stored automatically after a successful calibration.
To view the pH calibration data, press GLP while in measurement mode.
The instrument will display the time (hh:mm) of the last calibration.
Press the ARROW keys to view the next logged calibration parameter
(pressing the ºC key):
The date (yyyy.mm.dd).
The pH calibration offset.
The pH calibration slope (the GLP slope is the average of the calibration
slopes; the percentage is referred to the ideal value of 59.16 mV/pH).
TIME
CAL
DATE
CAL
CAL mV
%
CAL
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