bluelab pH Pen - Hydration of the pH pen; Preparation for hydration; Submerging the probe tip; Soaking duration

Press the power button. To turn pen off, press and hold the power button until “OFF” is
displayed.
Note: The pen will automatically turn off after 4 minutes to conserve battery power.
2. Measure pH
Remove the storage cap, place probe in solution and wait for the reading to stabilise.
3. To hold the reading
To hold the reading on the display, short press the power button. To turn hold mode off, press the
power button again.