Hanna Instruments HI 84429 - Manual (Page 37)

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If the pH log is empty the message “No Records!” will be displayed.
pH METER GLP INFORMATION
The following items are included in electrode GLP: the time and date of the last calibration,
offset, slope, electrode condition, calibration timeout and the calibration buffers. The buffers
displayed in video inverse mode are from the previous calibration.
If a calibration hasn’t been performed the message “Not Calibrated” will be displayed.
The pH meter GLP information refers to the pH calibration date.
To view this information press MENU key while in pH meter mode then GLP.
A set of information regarding electrode calibration is displayed.
If Delete All was pressed the instrument will ask for confirmation.
Press CFM to delete all records or ESC to return to the previous screen without deleting.