Sample Measurement
4.4.1 Rinse the pH electrode in distilled water or pure water, dry it, and dip it into sample solution. Stir the
solution gently and let it stand still in the sample solution until icon appears and stays on LCD, get the pH
reading, which is pH value of sample solution, please refer to Figure-9 for calibration and measurement process
of the pH meter.
Figure-9 Calibration and measurement process of pH meter
4.4.2 Self-Diagnosis Information
Table – 4 Self-diagnosis information
Wrong pH buffer solution or the buffer
solution out of range.
1.Check whether pH buffer solution is correct.
2.Check whether the meter connects the electrode
properly.
3.Check whether the electrode is damaged.
Press when measuring value is not
stable during calibration.
Press key when icon appears and stays.
During calibration, the measuring value
being unstable for over 3 minutes
1.Check whether there are bubbles in glass bulb.
2.Replace with a new pH electrode.
pH electrode zero electric potential out of
range（<-60mV or >60mV）
1.Check whether there are bubbles in glass bulb.
2.Check whether pH buffer solution is correct.
3.Replace with new pH electrode.
pH electrode slope out of range
（<85% or >110%）
Enter in pre-set due calibration to remind
calibration
Press key to perform calibration or cancel due
calibration setup in parameter P1.2.
Submerge the electrode
in pH4.00 solution, press
when appears.
Submerge the electrode
in pH7.00 solution, press
when appears.
After the 1st calibration
point is done, press
to enter the
measurement mode.
Press to turn
on the meter.
Press to enter
the calibration
mode.
After the 2nd calibration
point is done, press
to enter the
measurement mode.
After the 3rd calibration
point is done, the meter
enters the measurement
mode automatically.
Submerge the electrode
in pH10.01 solution,
press when
appears.
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