You can do recalibration easily with the help of the manual. ✿【Automatic Temperature Compensation】: The product provides full PH 0-14 measurements with temperature compensation which will make the result more accurate. pH Meter for Water, Digital pH Meter, pH Tester 0.01 pH High Accuracy Water Quality Tester with 0-14 pH Measurement Range,for Household Drinking,Water Hydroponics,Swimming Pool,Aquarium,Spa(Blue), Tools & Home Improvement - Canada Warm Tips: Recalibration is required in the following situations: 1., Long inactivity 2., Frequently used 3., The test accuracy is very high., 4., Press calibration (cal) Specification: 1., Color: Yellow 2., Accuracy: ±0., 1 pH (20°C) 3., Use Environment: RH 95%, 0-50°C ( 32～176°F ) 4., Power Supply: 2*1., 5V (LR44 Button cell) (Included) 5., Calibration: tow points automatic calibration 6., Product Size: 6., 3 * 1., 18 * 0., 79 inch 7., Weight:50g /(1., 7oz) Package Include: 1., 1 x PH Meter 2., 3 x Calibration packets 3., 1 x User's manual Directions Calibration Tips: 1., Dissolve pH buffer powder in 250ml of distilled water., 2., Turn on the PH meter and clean the electrode in distilled water, then immerse the electrode in the pH standard solution., 3., Press the 'CAL' button, wait until the reading is the same as the PH value of buffer powder and steady., 4., Clean the electrode with distilled water and dry it. Portable Digital PH Meter Tester with TDS Meter Pe... – Grandado ✿【Wildly Application】: This digital pH meter is mini-size, weighing only 1., 7 Oz, which allows you to take it in a pocket or bag. Remove the protective cover, press the switch button, immerse the probe of the pH Meter in the solution, and you can get the reading immediately., C ✿【Easy Calibration】: pH meter is already calibrated by our professional staff and you can use it directly as soon as you receive it. The temperature of the testing liquid can vary from 0°C - 60°C (32°F - 140°F). Warm Tips: Recalibration is required in the following situations: 1., Long inactivity 2., Frequently used 3., The test accuracy is very high., 4., Press 'calibration' (cal). Digital pH/TDS Meter with ATC pH Tester, 0.01 Resolution High Dip the electrode in the target solution, making sure the whole electrode is submerged., 3., Stir the solution gently and wait for the value to stabilize. High Accuracy pH Tester: Measures pH levels from 0.00 to 14.00 with ±0.1 pH accuracy; Features one-touch automatic calibration with included buffer powder... It is wildly used in testing pH for drinking water, swimming pools, aquariums, hydroponics, laboratory pH testing applications, and more.
