CFR 30-70.206-2014
矿产资源. 第70部分:强制性卫生标准-地下煤矿. 第70.206节:批准的采样设备;当量浓度.

Mineral Resources. Part70:Mandatory health standards—underground coal mines. Section70.206:Approved sampling devices; equivalent concentrations.

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标准号

CFR 30-70.206-2014

发布日期

1993年12月02日

实施日期

1993年12月02日

废止日期

无

中国标准分类号

F00

发布单位

US-CFR-file

适用范围

The concentration of respirable dust shall be determined by dividing the weight of dust in milligrams collected on the filter of an approved sampling device by the volume of air in cubic meters passing through the filter and then converting that concentration to an equivalent concentration as measured with an MRE instrument. To convert a concentration of respirable dust as measured with an approved sampling device to an equivalent concentration of respirable dust as measured with an MRE instrument, the concentration of respirable dust measured with the approved sampling device shall be multiplied by the constant factor prescribed by the Secretary for the approved sampling device used, and theproduct shall be the equivalent concentration as measured with an MRE instrument.

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