Hanna Instruments HI 3512 - Manual (Page 26)

26
The instrument will display “ Calibration Cleared” and the instrument
returns to measuring mode.
ELECTRODE CONDITION
The display is provided with an icon, and a numeric value (unless the
feature is disabled) which gives an indication of the electrode status after
calibration.
The indication remains active until the end of the calibration day.
Note: The electrode condition is evaluated only if current calibration
includes at least two standard buffers.
CLEAN ELECTRODE WARNING
Each time pH calibration is performed, the instrument internally
compares the new calibration with the one previously stored.
When this comparison indicates a significant difference, the “Clean
Electrode” warning message is displayed to advise the user that the pH
electrode may need to be cleaned (see ELECTRODE CONDITIONING &
MAINTENANCE section for details, page 72).
After cleaning, perform a new calibration.
Note: If the calibration data are cleared, the comparison is done with
the default values.