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3. Preparation before Use
3.1 Pull out the battery insulation slip, and take off the probe cap.
3.2 Rinse off the probe in pure water (preferably distilled or
deionized water. RO water or tap water is the alternative) ,
then shake off excess water.
3.3 Perform at least a 2-point calibration at pH 7.00 and pH 4.00.
For tutorial, refer to Section 4.
3.4 When you are not using the tester, always store the spear
probe in the 3M KCL soaking solution. Never let it dry out.
Replace the soaking solution if it gets contaminated.
4. pH Calibration
4.1 How to Calibrate
4.1.1 Short press
to power on.
4.1.2 Pour pH buffer solutions in the correspondent calibration vials to
about half volume.
4.1.3 Rinse the probe in pure water; Shake off excess water. Dip the
probe in the pH 7.00 buffer solution first, and make a quick stir in
the solution, then hold still.
4.1.4 Long press
to enter calibration mode, screen will turn green
(Short press
if you decide to quit calibration and return to
measurement mode).
4.1.5 Wait for the reading to stabilize (when
stays on the screen), then
short press
to finish the 1st point calibration. After calibration is
completed, the tester will return to measurement mode. Icon
will
appear at the bottom left, indicating a successful 1-point calibration
(middle point).
4.1.6 To calibrate 2nd point, use 4.00 pH buffer and repeat Step 4.1.3 to
4.1.5 (Do NOT turn off the tester after you finish pH 7 calibration).
will display next to
,
indicating a successful 2-point calibration (low and middle points).
4.1.7 If necessary (target pH>8.00), calibrate 3rd point using 10.01 standard pH buffer and repeat
Step 4.1.3 to 4.1.5,
will show up next to
and
, indicating a successful 3-point
calibration (high, low, and middle points).
