Abstract：In order to provide the reliable calibration rules for laser dust particles counter, the standard particles distribution rule of 0.296、0.498、1.019 and 2.995 μm were studied under the conditions of different diluents jet flow and particles concentration.The particles concentration as a function of working time was analyzed by the particles generation system. Two calibration methods of particles counter were discussed. The results show that the percentage of measured particles descends with the increase of particles size. The distributions of the first three standard particles are stable compared to the latter. The percentage of measured particles are independent of diluents jet flow and particles concentration. The settling time of particles occurrence system is about 10 minutes. The first three standard particles are suitable for double tube simultaneous measurement and the latter is suitable for single tube time-sharing measurement in the comparison calibration of different flow particles counter.

Keywords：standard particles; distribution rule; particles generation system; double tube simultaneous measurement; single tube time-sharing measurement