ITEM NAME:2Pcs Digital PH Meter Tester 0-9990Ppm Digital TDS EC LCD Water Purity PPM P3H6 2Pcs Digital PH Meter Tester 0-9990Ppm Digital TDS EC LCD Water Purity PPM P3H6 [To calibrate the pH Tester] Calibration does not require a screwdriver. The pH meter with ATC can automatically calibrate. To maximize convenience, simply press the Calibration key. [High accuracy]: The numbers of the pH meter range from 0.00-14.00 (PH), while the numbers of the digital EC and TDS meters range from 0 to 19990 ppm. [TDS have lock & auto-shut off function] Conductivity meter has the accuracy of 0.1 Celsius. Dump the item about 4 seconds in the liquid to get accurate values. In order to record the number, you can also Press the HOLD keyboard. [LCD Display]: The LCD clearly displays the data and the LCD backlight turns off automatically. Small and easy to carry. How do I calibrate the PH meter? STEP 1: Clean the electrode in distilled water. STEP 2: Immerse the electrode in a standard pH 6.86 buffer solution. STEP 3: Press the "CAL" key. Wait until the display is digitally 6.86 pH, then calibrate at pH 6.86 STEP 4: Clean the electrode in distilled water and dry. Immerse the electrode in Ph 4.00 standard buffer solution. STEP 5: Press the "CAL" key. Wait until the display is digital 4.00 pH. Then complete the pH 4.00 calibration STEP 6: Clean and dry electrode, place meter in standard buffer solution PH 9.18. Check that the reading is correct between 9:17 and 9:19. Name:TDS PH Meter Set PH Resolution: 0.01pH Accuracy: +/- 0.05pH TDS: 0 ~ 9990ppm Conductivity: 0 ~ 9990us / cm Accuracy: +/- 2% Colour: blue + black + white Material: plastic Size: length about 155mm Package Contents: 1 * PH test pen 1 * TDS test pen 1 * Instruction manual
