ISO 21018-4:2016
Hydraulic fluid power — Monitoring the level of particulate contamination in the fluid — Part 4: Use of the light extinction technique
ISO 21018-4:2016 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 off-line 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 ISO 21018-4:2016 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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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Health and safety
5 Equipment
5.1 General
5.2 Equipment for online and off-line calibration and verification
6 Operating procedures
6.1 General
6.2 Operating from a pressurized line for the field contamination monitor
6.2.1 General
6.2.2 Procedure
6.3 Operating from a system reservoir for the field contamination monitor
6.3.1 General
6.3.2 Procedure
6.4 Operating from a bulk container for the field contamination monitor
6.4.1 General
6.4.2 Procedure
6.5 Operating from a sample bottle for the field contamination monitor
6.5.1 General
6.5.2 Procedure
7 Calibration and verification procedure
7.1 General principles
7.2 Required equipment
7.3 Determination of particle concentration limits
7.4 Calibration
8 Reporting of results of calibration and verification procedure
9 Test report
10 Identification statement
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Health and safety
5 Equipment
5.1 General
5.2 Equipment for online and off-line calibration and verification
6 Operating procedures
6.1 General
6.2 Operating from a pressurized line for the field contamination monitor
6.2.1 General
6.2.2 Procedure
6.3 Operating from a system reservoir for the field contamination monitor
6.3.1 General
6.3.2 Procedure
6.4 Operating from a bulk container for the field contamination monitor
6.4.1 General
6.4.2 Procedure
6.5 Operating from a sample bottle for the field contamination monitor
6.5.1 General
6.5.2 Procedure
7 Calibration and verification procedure
7.1 General principles
7.2 Required equipment
7.3 Determination of particle concentration limits
7.4 Calibration
8 Reporting of results of calibration and verification procedure
9 Test report
10 Identification statement
Bibliography