5 in 1 TDS/EC/Salinity/S.G./Temperature Meter Digital Water Quality Tester for Households, Swimming Pools, Drinking Water, Aquarium Descriptions: C-100 Versatility Portable TDS/EC/Salt/S.G/TEMP Water Quality Tester. Mainly used for testing TDS (ppm/), EC (uS/cm, mS/cm), salt (%), S.G (seawater gravity) and TEMP (°c/°f) Feather is simple and portable. Put the meter into the solution, it can respond to the reading quickly and steadily, and has calibration function to ensure high accuracy. The measuring range is large and wide, which can measure both freshwater salinity and sea salt This is an amazing digital Water Quality Monitor Tester for home use, swimming pools, drinking water, aquariums Packing List 1*5 in 1 Water Quality Tester 1*English Manual EC Specification: Range: 0 to 10000uS/cm 10.01-19.99mS 20.1-400mS/cm Resolution: 1uS/cm; 0.1 ms/cm; Accuracy: ± 2% F.S TDS: Range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0ppt (Automatically Out of Range) Resolution: 1ppm; 0.1 points Accuracy: ± 2% F.S Salinity: Range: 0.00 to 25.00% Resolution: 0.01% Accuracy: 0.01-5.00% (± 0.1%) 5.10-25.00% (± 1%) SG: 1.000-1.222 Calibration: EC: Optional three-point calibration (1413uS 12.88mS 111.8mS) Temperature compensation: ATC function Operating environment: 0 to 80.0°c (32.0-176f); lt; 90% TDS Ratio: 0.5 Temperature Range: 0.1-80.0°c 32.0-176°f Temperature Accuracy: +0.5°c Temperature Resolution: 0.1°c/°f Auto Power Off: 5 minutes Power: 3x1.5 LR44 Screen Size: 28*17mm Size/Weight: 159*34*16mm (6.31*1.3*0.6in)/60g (2.1oz) Display: Support Backlight Battery: Low Battery Indicator Troubleshooting Turn On but Don't Display 1. The battery is not installed or the battery is low or not installed properly; 2. Do not press the power button correctly; Solution: 1. Remove the battery packaging, reinstall the battery, or replace a new battery; 2. Check whether the positive and negative poles of the battery are correct; 3. The above methods are correct, the instrument can not be opened, please return to the factory or agent. Unstable for reading 1. Air bubbles around the electrode will severely affect the reading. To reduce air bubbles, fully immerse the electrode and twist it in the air to eliminate air bubbles; 2. The solution may be asymmetrical, resulting in unstable readings; 3. The probe is not immersed deep enough in the solution; 4. The probe is broken; 5. Environmental disturbance measurement. Multifunctional Water Quality Tester C-100 Working Mode 1. Press ON/OF, turn on the meter, remove the protective cover, insert it into the solution to be tested, and do not immerse it over the dip line. Then gently shake it a few times in the water to eliminate bubbles around the electrode and read the correct measurement value after a stable value of 2. Press MODE/CAL to enter different models. The unit of TDS is PPM or PPT, the unit of EC is usa or mS, the unit of salt is %, and the unit of specific gravity of seawater is S.G. 3. Press the HOLD/TEMP button, it will be displayed in the upper left corner of the screen, which means the value is being done, then remove the meter from the solution and read the value, press the HOLD/TEMP button again to exit the hold mode. 4. Hold hold/TEMP for a long time, the screen will change between °c and °f Calibration After long-term use, you need to calibrate. Put it into the standard solution, enter the TDS/EC mode, press the mode/CAL mode for four seconds, enter the automatic calibration mode, the corresponding value will flash on the screen, press the HOLD/TEMP button to make the Plus sign or mode/CAL decrement, and then calibrate to the standard solution value, after three flashes, the calibration is complete