This machine is designed and manufactured in accordance with ZBW04009-89 "Method for Measuring the Frictional Voltage of Fabrics". Under laboratory conditions, it is used to evaluate the electrostatic characteristics of fabrics or yarns and other materials charged in the form of friction. Instrument characteristics 1. Random display of peak voltage, half-life voltage and time 2. The peak voltage is automatically locked 3. Automatic measurement of half-life time Technical index 1. Electrostatic voltage test range: 0～10KV, accuracy: ≤±1% 2. The linear speed of sample rotation is: 190±10m/min, and the pressure applied by friction is: 500CN 3. Friction time: 0.1～59.9 seconds adjustable 4. Half-life time range: 0.1S～9999.9S 5. Sample size: six pieces of 50×80mm2, friction material: 200×25mm2 6. The outline size of the host: 45mm×215mm×260mm The outline size of the electric control box: 450mm×256mm×185mm 7. Power supply: AC220V 50Hz 8. Weight: about 55kg