Draft
International Standard
ISO/DIS 4407
Hydraulic fluid power — Fluid contamination — Determination of particulate contamination by the counting method using an optical microscope
Reference number
ISO/DIS 4407
Edition 3
© ISO 2024
Draft International Standard
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Under development
This Draft International Standard is in the enquiry phase with ISO members.
Will replace ISO 4407:2002

ISO/DIS 4407

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Format
CHF 63
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Abstract

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 greater than or equal to 2 micrometres 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.

General information

  • Status
     : Under development
    Stage
    : Full report circulated: DIS approved for registration as FDIS [40.99]
  • Edition
     : 3
    Number of pages
     : 25
  • Technical Committee :
    ISO/TC 131/SC 6
    ICS :
    23.100.60 
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Life cycle

Sustainable Development Goals

This standard contributes to the following Sustainable Development Goal

9
Industry, Innovation and Infrastructure

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