3. Preparation before Use
3.1. Prepare a cup of pure water (250-500ml) for probe rinsing. Pure water refers to tap water, RO
water, distilled water, or deionized water.
3.2. Pull off the battery insulation paper; Take off the probe cap.
3.3. Perform a 2-point calibration in pH 7.00 and pH 4.00 standard buffers. Refer to Section 4 for tutorial.
4. Calibration
■ Notes
a) The 1st point calibration must be 7.00 pH. Perform the 2nd and 3rd point calibrations (4.00 or 10.01)
right after the 1st point calibration is finished. Do NOT turn off the tester before you calibrate 2nd or
3rd point. Otherwise, you will need to restart the calibration process with 7.00 pH first.
b) In calibration mode, when the measured value is not fully stabilized ( is not staying on LCD),
pressing will cause .
c) Only pH 4.00 and pH 7.00 buffer solutions are included in the test kit, pH 10.01 is not. You can
purchase it separately if needed (when your target pH level is > 8.0 pH).
4.1 Short press to power on.
4.2 Rinse the probe in pure water and shake off excess water. Long
press to enter calibration mode. (Short press to go
back to measurement mode if you want to cancel the
calibration).
4.3 Insert the probe in the 7.00 pH calibration solution to start 1
st
point calibration; Make a quick stir in the solution then hold still;
Wait for to appear and stay on the screen.
4.4 Short press to start 1st point calibration; tester returns to
measurement mode; will display on the lower left corner,
indicating a successful 1-point calibration.
4.5 To calibrate 2
nd
point, use 4.00 pH buffer and repeat Step 4.2 to
4.4 (Do NOT turn off the tester after you finish pH 7 calibration).
will display next to , indicating a successful 2-point
calibration.
4.6 If necessary (target pH > 8.0), calibrate 3
rd
point using 10.01
standard pH buffer (sold separately) and repeat Step 4.2 to 4.4.
will show up next to and , indicating a successful
3-point calibration.
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