5
4
pH Measurement
4.1
Power on and remove the probe cap.
4.2
Rinse the probe with clean water and shake off excess water.
4.3
Fully submerge the probe into the solution at least 1 inch deep,
make a quick stir to remove potential air bubbles around the
probe.
4.4
Hold the pen and wait for the reading to stabilize (
stays on
screen), then record the reading.
4.5
Thoroughly rinse off the probe with clean water, then close the
probe cap.
5
EC Calibration
5.1
Power on and remove the probe cap. Press
to switch to EC
measurement mode. Rinse the probe with clean water and
shake-dry, then submerge it in the 2.77 EC standard solution;
shake the probe in the solution up and down for a few seconds
to remove potential air bubbles, then let it stand.
5.2
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.
5.3
icon will show up on the lower left corner indicating the tester
is successfully calibrated.
will disappear in 30 days after
calibration, reminding you to re-calibrate EC. We recommend
calibrating the EC once every month to ensure the accuracy. If
you feel like the accuracy might be off, simply test the standard
solution (make sure the standard is fresh and clean). If the reading is greater than 2.8
EC or smaller than 2.7 EC, then it’s time to calibrate again.
5.4
If the calibration fails, the screen will turn red. For details, see
Section 13 Troubleshooting Guide.