BS EN 60970-2007 绝缘液体.粒子计数和大小测定的方法

标准号：BS EN 60970-2007
中文标准名称：绝缘液体.粒子计数和大小测定的方法
英文标准名称：Insulating liquids - Methods for counting and sizing particles
标准类型：E38
发布日期：2007/9/28 12:00:00
实施日期：2007/9/28 12:00:00
中国标准分类号：E38
国际标准分类号：29.040.10
引用标准：IEC 60475;ISO 4406;ISO 4407;ISO 5884;EN 50353
适用范围：This standard describes the sampling procedures and methods for the determination ofparticle concentration and size distribution.Three methods are specified. One uses an automatic particle size analyser, working on thelight interruption principle. The other two use an optical microscope, in either the transmittedlight or incident light mode, to count particles collected on the surface of a membrane filter.The optical microscope methods are described in ISO 4407.All three methods are applicable to both used and unused insulating liquids.Annex A contains an alternative sampling procedure using a syringe and Annex B reports areference for the calibration of automatic particle counters.NOTE 1 The methods are not intended to measure particulate matter in liquids containing sludge. While analysingsolid content on oils containing sludge refers to method for sediment and sludge determination in IEC 60422,Annex C.NOTE 2 The methods specified are only applicable to measurements related to a limited range of size andnumber.