標(biāo)準(zhǔn)號(hào)：BS ISO 4407-2002
中文標(biāo)準(zhǔn)名稱：液壓流體動(dòng)力.流體污染.用光學(xué)顯微鏡計(jì)數(shù)法測(cè)定粒狀物污染
英文標(biāo)準(zhǔn)名稱：Hydraulic fluid power - Fluid contamination - Determination of particulate contamination by the counting method using an optical microscope
標(biāo)準(zhǔn)類型：J20
發(fā)布日期：2002/5/21 12:00:00
實(shí)施日期：2002/5/21 12:00:00
中國(guó)標(biāo)準(zhǔn)分類號(hào)：J20
國(guó)際標(biāo)準(zhǔn)分類號(hào)：23.100.60
適用范圍：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.