标准摘要
[中文适用范围]： IEC 61779 的本部分规定了用于检测和测量空气中可燃气体或蒸气浓度的 II 组（如第 1 部分中定义）便携式、可运输和固定设备的要求。该装置或其部件可以安装或使用在潜在爆炸性环境中，而不是易受沼气影响的矿井（即I类）。适用于本标准涵盖的设备的要求和测试方法在第 1 部分中规定。 2 本标准仅限于用于检测和测量空气中可燃气体或蒸气浓度高达 100% 爆炸下限 (LEL) 的设备。 。 [外文原描述]： Specifies requirements for group II (as defined in part 1) portable, transportable and fixed apparatus for the detectino and measurement of combustible gas or vapour concentrations with air. The apparatus, or parts thereof, may be installed or used in potentially explosive atmospheres, other than mines susceptible to firedamp (i.e. group I). This standard is restricted to apparatus intended for the detection and measurement of combustible gas or vapour concentrations with air up to 100% lower explosive limit (LEL).
英文名称Electrical apparatus for the detection and measurement of flammable gases - Part 4: Performance requirements for group II apparatus indicating up to 100% lower explosive limit