3
2
Preparation Before First Use
2.1
Pull out the battery insulation slip;
loosen the probe cap ring, then pull out
the probe cap.
2.2
Prepare a bucket of clean water (tap
water is ok. Ideally use RO water).
Rinse the probe in it and shake off
excess water.
2.3
Calibrate the tester at pH 7 and pH 4 before first use. See below for calibration tutorial.
3
pH Calibration
3.1
Power on the pen and remove the probe cap.
Always calibrate
7.00 pH first.
3.2
Rinse the probe with clean water and shake off excess water, then
submerge it in the 7.00 pH standard buffer;
make a quick stir in
the solution
and hold still.
3.3
Hold
until screen turns green. The pen starts automatic
calibration. Wait for "Good" to show up (in 10-15 seconds),
indicating the calibration is completed, then the pen returns to
measurement mode.
Short press any key while calibrating (in green screen) to cancel
calibration and return to measurement.
