7
4. Dip/stir the electrode into the sample.
5. The pH value is displayed.
6. “- - -” is displayed when the pH sample is out
of range.
7. During measurement, press ▲ to freeze the
reading on the LCD.
“Hold” is displayed. Press ▲ again to return
to normal measurement.
8. The pH Pen automatically shuts off after 20
minutes of inactivity. To disable this feature,
start with the unit off, then simultaneously press
the CAL and ▲ buttons. Release both buttons
when “n” is displayed. The unit returns to
measurement mode.
9. After use, turn off the unit and rinse the electrode.
10. Protect the electrode’s lifespan by adding a
few drops of KCL (potassium chloride) solution
into the protective cap before storage.
11. Always keep the protective cap on when the
unit is not in use.
