Norm

NEN-ISO 4407:2002 en

Hydrauliek - Vloeistofverontreiniging - Bepaling van de deeltjesverontreiniging door middel van de tellingsmethode bij gebruik van een optische microscoop

73,12

Over deze norm

Status Definitief
Aantal pagina's 14
Commissie Hydrauliek en pneumatiek
Gepubliceerd op 01-06-2002
Taal Engels
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 W 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.

Details

ICS-code 23.100.60
Nederlandse titel Hydrauliek - Vloeistofverontreiniging - Bepaling van de deeltjesverontreiniging door middel van de tellingsmethode bij gebruik van een optische microscoop
Engelse titel Hydraulic fluid power - Fluid contamination - Determination of particulate contamination by the counting method using an optical microscope

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