BS ISO 4407-2002
液压流体动力.流体污染.用光学显微镜计数法测定粒状物污染

Hydraulic fluid power - Fluid contamination - Determination of particulate contamination by the counting method using an optical microscope

BS ISO 4407-2002 发布历史

This International Standard specifies methods for determining the level of participate contamination in liquids used in hydraulic systems by counting the number of particles deposited on the surface of a membrane filter using an optical microscope. It includes particle counting by two manual methods and image analysis, using either transmitted or incident lighting systems. Particle sizes ≥ 2 μn can be sized and counted by this method, but the resolution and accuracy of the results wiB depend upon the optical system used and the capabilities of the operator. All hydraulic fluids with a wide range of contamination levels can be analysed according to this International Standard. However, the counting uncertainty at the larger particle sizes increases if the volume filtered is reduced to allow smaller sized particles to be counted, where a fine precipitate or a high particle concentration is present.

BS ISO 4407-2002由英国标准学会 GB-BSI 发布于 2002-05-21，并于 2002-05-21 实施。

BS ISO 4407-2002 在中国标准分类中归属于: J20 液压与气动装置，在国际标准分类中归属于: 23.100.60 过滤器、密封垫和流体杂质。

BS ISO 4407-2002的历代版本如下：

• 2002年05月21日 BS ISO 4407-2002 液压流体动力.流体污染.用光学显微镜计数法测定粒状物污染

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标准号

BS ISO 4407-2002

发布日期

2002年05月21日

实施日期

2002年05月21日

废止日期

无

中国标准分类号

J20

国际标准分类号

23.100.60

发布单位

GB-BSI

被代替标准

BS 5540-8-1991

适用范围

This International Standard specifies methods for determining the level of participate contamination in liquids used in hydraulic systems by counting the number of particles deposited on the surface of a membrane filter using an optical microscope. It includes particle counting by two manual methods and image analysis, using either transmitted or incident lighting systems. Particle sizes ≥ 2 μn can be sized and counted by this method, but the resolution and accuracy of the results wiB depend upon the optical system used and the capabilities of the operator. All hydraulic fluids with a wide range of contamination levels can be analysed according to this International Standard. However, the counting uncertainty at the larger particle sizes increases if the volume filtered is reduced to allow smaller sized particles to be counted, where a fine precipitate or a high particle concentration is present.