Digital Grain Hardness Tester High Precision LCD Agricultural Instrument Research Test Wheat Rice 20kg196N Sclerometer Durometer Model AGW-20 Max. Load 20kg 196N Load division value 0.01kg 0.1N Load cell Inner Accuracy 2 Power 3.7V Lithium battery Charger time 4~6hours Battery Continuous use About 15 hours Battery life 300times Charger InputAC 100-240V 50/60HZOutputDC 5V 1000mA Working temperature 535 Transport temperature -1060 Relative humidity 1580RH Working environment No source and corrosive media around How to use it ? 1 Turn on the instrument ,and enter into measurement interface, choose the real time mode or peak mode as your requirements. 2 Put the grain on the platform(better vertical),and then rotate the wheel to move up until the grain break,at the same while ,the digital display show the testing value. 3 If you need to test again,clean the platform ,and press ZERO to clear the screen,and do as the step 2. 4 After testing, clean the testing platform,turn off ,put the clamp down ,put all accessories in the tool box for next usage. Note: 1.When the power is running low ,it need to charge 4~6 hours can be normal using. 2.Any error operation may damage the instrument or cause serious accident.This manual indicates important matters about how to prevent accidents and the usage of instrument,please read this instructions carefully before using,keep it securely in preparation for reading again.