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ISO 11500:2022

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

Publication date:   Dec 21, 2022

General information

60.60 Standard published   Dec 21, 2022

ISO

ISO/TC 131/SC 6 Contamination control

International Standard

23.100.60   Filters, seals and contamination of fluids

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 11500:2008

NOW

PUBLISHED
ISO 11500:2022
60.60 Standard published
Dec 21, 2022