1. Dip the sensor into the already set buffer solution when in pH calibration mode. For details,
please refer to the standard solution setting.
2. Press key to enter pH calibration step. “
” will be displayed. Dip the sensor into buffer
solution(7.00 or 6.86 pH). When the value is stable and display “ ” together with the twinkling
stops,indicates the first zero point calibration is completed. Screen blanks for 2 seconds for saving
the data. Then the meter will automatically go to second point calibration. Dip the sensor into the
second buffer solution. When the value is stable and display “ ” together with the twinkling stops,
indicates the second point calibration is completed. You can go next to third point calibration or
fourth point calibration. You can also press key go back to measurement mode. (To check
the calibration results: long press for 3 seconds)
Note: During the calibration process, you can also press key to terminate calibration process
and back to measurement mode. Calibrated points are already saved.
If “
Err
” shows when in calibration, could be the following reasons:
1.Wrong buffer solution. First point defaults as Zero point calibration. Please follow the Auto Buffer
recognition order.
2.Poor performance of electrode.
3. Stabilized time is more than 30 seconds.
4. After calibration, in measurement mode, if”
%
” is continuous twinkling, means the sensor slope is
below 65%. Please timely maintain the electrode or change electrode. Then re-calibrate.
17
pH calibration
5.5 Calibration Mode
change
standard
solution
change
standard
solution
