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6.1.2 Use the Electrode
Screw off the KCL storage bottle, and put it aside (do not dump or spill the KCL solution). Rinse the
electrode with distilled or deionized water. Shake off excess water or blot-dry with clean tissue or kimwipe.
Stir the electrode for a few seconds after it’s dipped into the test solution and then hold it still. Wait for the
reading to get fully stabilized ( appears and stays) and then take the measurement. When the test
is finished, place the electrode in the storage bottle and tighten the cap to keep the sensitivity of the pH
sensor.
6.2
pH Calibration
6.2.1 After powering on the meter, short press to enter calibration mode,
c1
flickers on LCD,
indicating the meter enters the first point calibration.
6.2.2 Rinse off the pH electrode in pure water and remove excess water, then insert it into the pH7.00
buffer solution, make a quick stir and then hold it still. When the reading is stabilized and stays on
screen, short press again to finish the 1
st
point calibration. “
7.00 pH
” will start flickering and a
flickering
c2
will show up, indicating the 1
st
point calibration has been finished and the meter is entering
the 2
nd
point calibration.
6.2.3. Rinse off the pH electrode in pure water and remove excess water, then insert it into the pH 4.00
buffer solution, make a quick stir and then hold it still. When the reading is stabilized and stays on
screen, short press again to finish the 2
nd
point calibration.
“4.00 pH”
will start flickering and a
flickering
c3
will show up, indicating the 2
nd
point calibration has been finished and the meter is entering
the 3
rd
point calibration.
6.2.4. Rinse off the pH electrode in pure water and remove excess water,
then insert it into the pH 10.01 buffer solution, make a quick stir and then
hold it still. When the reading is stabilized and stays on screen, short
press again to finish the 3
rd
point calibration.
“10.01 pH”
will start
flickering and then the meter will return to measurement mode.
will show up at the bottom left (see picture 4-1), indicating all 3 calibrations are finished.