Hanna Instruments HI 110 - Manual (Page 15)

15
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
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 instruments check if the time-out time has expired. If the time elapsed, the
“CAL” “INTV” tags will blink as a reminder.
Note: If the instruments were not calibrated, the “CAL” “INTV” tags will be
displayed even if the feature is disabled in SETUP menu.
LAST CALIBRATION DATA
Last calibration data are 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.
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).
DATE CAL
mV CAL
% CAL