Description:Equipped with big backlit LCD screen, this water quality tester is easy and convenient to read data in real time.This product is a portable TDS, EC, salinity, S.G and temperature water tester, which can quickly and steadily respond to the reading, and has a calibion function to ensure high accuracy.It is made of high quality ABS material.The length of this product is 15.9cm, width is 3.4cm and thickness is 1.6cm.Water tester is perfectly suitable for swimming pool, hotel, aquariums, etc.Item Name: Water TesterMaterial: ABSSpecifications: EC:Range: 0 to 10000uS / cm 10.01-19.99mS 20.1-400mS/CMResolution: 1uS / cm; 0.1 ms / cm;Accuracy: 2 F.STDS:Range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0ppt (auto out of range)Resolution: 1ppm; 0.1 pointAccuracy: 2 F.SSalinity:Range: 0.00 to 25.00%Resolution: 0.01%Accuracy: 0.01-5.00% ( 0.1%) 5.10-25.00% ( 1%)SG: specific gravity of seawater 1.000-1.222Calibion:EC: Three-point calibion is optional (1413uS 12.88mS 111.8mS)Temperature Compensation: ATCOpening Environment:0 to 80.0 Celsius (32.0-176F); TDS Coefficient: 0.5Temperature Range: 0.1-80.0 Celsius 32.0-176 FahrenheitTemperature Accuracy: + 0.5 Celsius Temperature Resolution: 0.1 Celsius/FahrenheitAutomatic Shutdown: 5 MinutesPower: 3 x Button Batteries(Battery Included)Display: Support BacklightBattery: Low Battery IndicatorFeatures: High Accuracy, LCD, Compact Color: GreenSize Details: Overall Size: 15.9cm x 3.4cm x 1.6cm/6.26" x 1.34" x 0.63" (Approx.)Screen Size: 2.8cm x 1.7cm/1.1" x 0.67" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.No Display1. The battery is not installed or the battery power is insufficient or not installed correctly;2. Do not press the power button correctly;Solution:1. Remove the battery box, reinstall the battery or replace with a new battery;2. Check whether the positive and negative poles of the battery are correct;Unstable Reading: 1. Air bubbles attached around the electrode will seriously affect the reading. In order to reduce air bubbles, completely immerse the electrode and swing in the air to eliminate air bubbles;2. The solution may be asymmetric, resulting in unstable readings;3. The probe is not immersed deep enough in the solution;4. The probe is broken;5. Measure the interference of the environment.Mode of Operation:1. Press ON / OF to turn on the meter, remove the protective cap, and put it in the solution to be tested, do not immerse it above the immersion line. Then gently shake it several times in the water to eliminate air bubbles around the electrode, and read the correct measurement value after the value is stable2. Press MODE / CAL to enter different models. The unit of TDS is PPM or PPT, the unit of EC is uS or mS, the unit of salt is percentage, and the unit of seawater specific gravity is S.G.3. Press HOLD / TEMP, it will be displayed in the upper left corner of the screen, indicating that the value has been held, then take the meter out of the solution and read the value, press HOLD / TEMP again to exit the hold mode.4. Long press HOLD / TEMP the screen will switch between Celsius and FahrenheitCalibration:Need to calibrate after long time use, put it in the standard solution, enter TDS/EC mode, press MODE/CAL for four seconds, it will enter automatic calibration mode, the corresponding value will flash on the screen, press HOLD/TEMP to Plus sign or MODE / CAL decrement value, and then calibrated to the standard solution value, the calibration is completed after three flashes.Package Includes:1 x Water Tester1 x User Manual