Standard Svensk standard · SS-ISO 4407

Renhetsteknik - Vätskors renhet - Visuell partikelräkning med hjälp av optiskt mikroskop

Status: Gällande

This International Standard specifies methods for determining the level of particulate 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 µm can be sized and counted by this method, but the resolution and accuracy of the results will 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.


Filter, tätningar och föroreningar av fluider


Språk: Engelska

Framtagen av: SIS - Industriteknik

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

Artikelnummer: STD-33005

Utgåva: 1

Fastställd: 2002-10-25

Antal sidor: 18