pH and TDS Meter Combo 005ph High Accuracy Pen Type pH Meter 2 Readout Accuracy 3in1 TDS EC Temperature Meter

PH meter Calibration : Step1:Turn on pH meter , Disolve each buffer solution in 250 mI of distilled water.Step2:Immerse the electrode into the pH 6.86 solution. (under the temperature of 25) .Step3:Press the "CAL”(calibration) button for 5 seconds and release -Display will start flashing 6.86 -Wait until the display stops flashing.Rinse the electrode with distilled water and dry it with filter paper. Step4:Immerse the electrode in pH 4.00 solution. -Press "CAL buttonfor 5 seconds?then press and release immediately second time - Reading will start flashing 4.00. -Wait until display stops flashing.Rinse and dry the electrode with distilled water as before.Place the meter back to the buffer solution to test calibration JIf incorrect, please repeat the calibration If approximate pH of your test solution is known to be above 7.0, calibrate the meter using 6.86 and9.18 solution.To do this , please follow the calbration chart?The third step is the calibration method for 9.18 point Note: Recalibration is required in the following conditions: - Lengthy periods of inactivity - Very frequent use - The testing accuracy requirement is very high. - The "cal" (calibration) button was pushed and electrode exposed to air for extended period of time Maintenance: 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. If electrode has been dried out immerse it into distilled water for a few hours. Attention: 1. 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. 2. if you have done all steps as the manual?the meter still does not work, We'll be at your service.