As with the GB/T1345--2005 "test method for fineness of cement - Sieve Method", standard implementation of cement fineness square hole 45um and 80um sieve sieve analysis experiment method, to reduce the impact of human factors in the process of experiments, improve the accuracy of experiment. The product has the advantages of advanced structure, long service life, strong environmental protection performance, high screening speed, high accuracy, good reproduction performance and wide application. It is in the leading position in the world. It is the only specialized instrument that can meet the requirements of the new standard test method of fineness of cement at GB/T1345 in china. Two, use It is widely used in Cement Fineness Test and cement production control. Powder fineness test in other industries can be used simultaneously. China's cement monitoring stations, cement plants, coal ash and other units should use the instrument. 二、technical parameter 1. Sieve analysis test fineness: 80μm 2. Screening and analysis automatic control time 2min (factory setting) 3. Adjustable range of working negative pressure: 0 to -10000pa 4. Measuring accuracy: ±100pa 5. Resolution: 10pa 6. Working environment: temperature 0~50°C humidity <85%RH 7. Nozzle speed: 30 ±2r /min 8. The distance between the nozzle opening and the screen: 2-8mm 9. Add cement sample: 25g 10. Power supply voltage: 220V±10% 11. Power consumption: 600W 12. Working noise ≤75dB 13. Net weight: 40kg