数字式光学测尘仪对不同呼吸性粉尘浓度转换系数的求取

Transition Coefficients of Two Digital Dust-Indicators for Determining Mass-Concentra-tion of Inhalable Dust,

本文论述了用BY-1型呼吸性粉尘标定采样器,在云南锡业公司矿山和冶炼厂现场测定、求取P-5L_2型和TM型光学测尘仪的读数与呼吸性粉尘(空气动力学直径:<7.07μm和<10μm)质量浓度转换系数(K)的方法和结果.研究表明,由深色矿物组成的粉尘,其K值大于由浅色矿物组成的粉尘的K值.P-5L_2型光学测尘仪间的测尘误差85％以上在±10％以内,平均为±6.68％.

The article introduces that two digital dust-indicators are used in the Labour Protection Institute of Yunnan Tin Corporation, one is Japan-made P-5L2 Typed dust-indicator, the other Germany-made TM-μP Typed. How to use the instruments? According to China National Standard GB 5748, the relationship between the readings on the digital indicators and the mass concentrations of different inhalable dust should be interrelated. In this paper the transition coefficients are evaluated.