Lianzhong instrument standard sieve shaker (Figure) can be grindability index detector measuring principle of the Harrington instrument performance characteristics: 
 The Hastelloy instrument measuring principle is based on the energy consumed by the grinding law of (ground coal and pulverized coal to produce the new surface area is proportional to) as the theoretical basis determined in GB/T2565-1998 (coal grindability index method) (Bernhard Gro) provides that conditions will be prepared coal sample grinding, sifting, weighing, check from the calibration graph drawn by the standard coal grindability index, the index the greater the easy to show that ground, the microcomputer counts, the counter display 60 automatically shut down, if the host fails can the emergency stop, two starts, the number of revolutions can accumulate multiple functions, the exclusive manufacturer of this product through the ministerial technical appraisal domestic. 
 Indicators of technology: shaking frequency: 20 ± 1r/min limit the work of revolutions: 60 ± the 1/4r load force: 284 ± 2N motor power: 90W power supply: 
 Three-phase 380V Dimensions: 360X420X490