YIERYI 10 in 1 Water Quality Tester pH/TDS/EC/Salinity/Temp/S.G/ORP/H2/Fertility/Resistivity Meter

$5 OFF! ENDS SOON!Enter this Code at Checkout: WY4Z9MAB0ZRN Specification:pH Range: 0.00-14.00Temperature Range: 0.1℃-60℃ 31.2℉-140.0℉ EC Range: 0-20000us/cmTDS Range: 0-20000ppmORP Scale: 191999mvSalinity Level: 0-20%SG Range: 1,000 -1,222Hydrogen Scale: 0-2400 ppb㏁ Resistivity: 50Ω-20㏁Fertility of the Nutrient Solution: 0-3Notice:1. The factory has been calibrated and can be used directly.2. Rinse the electrode with purified water and leave dry when done.3. Gently stir a few times to make sure there are no air bubbles around the electrode.4. Do not disassemble the instrument without authorization to avoid damage.5. Keep dry.6. If the pH calibration is wrong, reset it.Troubleshooting:When the power is on, first press and hold the hold / temp key and the mode / CAL key, and do not release it in the middle. When the screen shows "del", release all keys to restore factory settings. Q&AQ: Do I need to calibrate before use?A: No, it has been calibrated before shipmentQ: Do I need to