User Manual

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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).