Digital pH Meter 0.00-14.00 High Precision pH Pen Water Quality Tester

Product description This digital pH meter features portable design, simple operation and high precision, ph pen tester can detect the pH value of liquids anytime, anywhere, widely used for aquarium, brewing, pool, cosmetic, aquaculture, drinking water, food, industrial wastewater, laboratory and other areas. Easy to use: 1.Remove the electrode protection cap.First rinse the electrode with distilled water. Dry with filter paper. 2.Press the ON/OFF button, and immerse the meter into the solution. (the solution should not over the immersion line.) 3.Stir gently and wait around 30 seconds until the display value is stable. You will get the right pH value. 4.Clean the electrode with pure water , turn off the meter and cover the protection cap. Calibration instructions: 1. Please calibrate according to the steps specified in the manual. For example, if you do not perform a two-point calibration (calibrate with pH 6.86 first, then calibrate with pH 4.01 or pH 9.18 for slope), directly perform a single-point calibration, or perform the calibration in the wrong order, the calibration result will be inaccurate. 2. Before calibration, if the electrode is not fully rinsed with distilled water or deionized water, or if the moisture on the surface of the electrode is not gently absorbed with clean filter paper after rinsing, the residual moisture will dilute the calibration solution, thereby affecting the calibration result. 3. After placing the test pen in the calibration solution, if the calibration solution is not gently stirred to make it uniform, or if sufficient time is not waited, it will also cause inaccurate calibration. 4. During the calibration process, the test pen should be kept away from strong electromagnetic interference environments, such as near high-power electrical appliances such as microwave ovens and induction cookers. Electromagnetic interference may affect the signal transmission and processing of the internal circuit of the test pen, resulting in inaccurate calibration. -If you receive the product and cannot turn it on, please first check whether the battery is installed correctly. If it cannot be solved, please contact us in time. -If the product's electrodes are unstable, please first check to see if the reading is stable for about a minute. Prematurely judging the reading may result in a "no response" condition. Low battery power may also be a contributing factor. If none of these conditions occur and the product is experiencing a reading failure or inoperability, please contact us immediately. -Yellow Water Pen PH Value Detection*1