ISO-21018-4 › Hydraulic fluid power - Monitoring the level of particulate contamination in the fluid - Part 4: Use of the light extinction technique

ISO-21018-4 - 2ND EDITION - CURRENT
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This document specifies a method for the determination of the particulate contamination level using the light extinction technique (also known as light blockage or light obscuration) either online or offline in containers. It also defines procedures for calibrating the instruments and verifying their correct operation both in the laboratory and in service.

In general, the techniques described in this document are suitable for monitoring:

— the general cleanliness level in hydraulic systems,

— the progress in flushing operations, and

— support equipment and test rigs.

The use of this method is applicable to single-phase liquid systems only.

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23.100.60 (Filters, seals and contamination of fluids Hydraulic fluids, see 75.120)

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Document Number

ISO 21018-4:2019

Revision Level

2ND EDITION

Status

Current

Publication Date

Aug. 1, 2019

Committee Number

ISO/TC 131/SC 6