Digital PH Meter for Water Hydroponics PH Range is 0-14 High Accuracy Water Quality Testeror TDS Meter for Water-Aquarium-Food-Drinking Water Swimming Pool-Sauce-Laboratory

Package Includes: ? 1 x PH Meter ? 3 x Calibration packets ? 1 x Carrying case ? 1 x User's manual How to use digital ph tester ? 1.Remove the protective cap and protective film on the screen. 2.First rinse the electrode with distilled water ,and suck with filter paper. 3.Turn the meter on by pressing the "ON/OFF" key. 4.Immerse the pH meter electrode in the solution to be tested (can not be over the immersion line) 5.Stir gently and wait around 30 seconds till the reading stabilized. 6.After finished ,clear the electrode with pure water,turn the meter off by pressing the "ON/OFF" key. 7.Always replace the protective cap after use. Attention of pH meter digital water tester 1.Don't touch the electrode by hard tools or fingers. 2.Clean the electrode every time before and after using. 3. Always replace protective cap after using digital meter to keep electrode from drying out due to prolonged exposure to air ,which leads to slow or unstable readings 4. if electrode has been dried out immerse it into distilled water for a 5. When the display value is fuzzy or unshown,The Battery should be replaced promptly.Pay attention to the polarity of battery, then need to recalibrate the meter. 6.if you calibrated the meter in the air or in wrong calibration solution, there will flash "ERR" on the screen,The meter will return to last step operation.if necessary ,recalibrate the meter. 7.if you have done all steps as the manual ,the meter still does not work,please let us know it , thanks