Standard Swedish standard · SS-ISO 11500:2008

Hydraulic fluid power - Determination of the particulate contamination level of a liquid sample by automatic particle counting using the light-extinction principle (ISO 11500:2008, IDT)

Status: Valid

This International Standard 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 International Standard 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.

NOTE 1 Measurements can be made with particles suspended in the original liquid or in a sample of the liquid diluted with a compatible liquid to reduce coincidence error.

NOTE 2 The presence of a fluid interface obstructs the light beam and gives false signals.


Filters, seals and contamination of fluids (23.100.60)

Product information

Language: English

Written by: SIS - Industriteknik

International title:

Article no: STD-67151

Edition: 1

Approved: 9/8/2008

No of pages: 40