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M00014502
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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
standard by International Organization for Standardization, 11/30/2022
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This document specifies an automatic particle counting procedure for determining the number andsizes 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.