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ISO 11500:2022

Current Revision

Hydraulic fluid power - Determination of the particulate contamination level of a liquid sample by automatic particle counting using the light-extinction principle

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This document specifies an automatic particle counting procedure for determining the number and sizes of particles present in hydraulic-fluid bottle samples of clear, homogeneous, single-phase liquids using an automatic particle counter (APC) that works on the light-extinction principle.

This document is applicable to the monitoring of:

a)       the cleanliness level of fluids circulating in hydraulic systems;

b)       the progress of a flushing operation;

c)        the cleanliness level of support equipment and test rigs;

d)       the cleanliness level of packaged stock fluid.

NOTE            Measurements can be made with particles suspended in the original liquid or in a sample of the liquid diluted with a compatible liquid when APC coincidence error limits are exceeded.


SDO ISO: International Organization for Standardization
Document Number ISO 11500
Publication Date Not Available
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO/TC 131/SC 6
Publish Date Document Id Type View
Not Available ISO 11500:2022 Revision