ISO 18471:2015

INTERNATIONAL ISO
STANDARD 18471
First edition
2015-10-15
Agricultural irrigation equipment —
Filters — Verification of filtration grade
Matériel agricole d’irrigation — Filtres — Vérification du grade de
filtration
Reference number
ISO 18471:2015(E)
©
ISO 2015

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ISO 18471:2015(E)

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ii © ISO 2015 – All rights reserved

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ISO 18471:2015(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Summary of the test method . 2
5 CCM structure and operation . 2
5.1 Construction . 2
5.1.1 Sampler (1) . 2
5.1.2 Control unit (2) . 2
5.2 Mode of operation . 2
6 CCM test screen characteristics . 3
7 ccuracy of measurements. 4
8 Test system layout . 4
9 Test procedure . 5
Bibliography . 7
© ISO 2015 – All rights reserved iii

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ISO 18471:2015(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
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organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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For an explanation on the meaning of ISO specific terms and expressions related to conformity
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Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.
The committee responsible for this document is ISO/TC 23, Tractors and machinery for agriculture and
forestry, Subcommittee SC 18, Irrigation and drainage equipment and systems.
iv © ISO 2015 – All rights reserved

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INTERNATIONAL STANDARD ISO 18471:2015(E)
Agricultural irrigation equipment — Filters — Verification
of filtration grade
1 Scope
This International Standard specifies a test method for the verification of filtration grade of filters
intended for operation in agricultural irrigation systems. It is intended to be used for verifying the filter
manufacturer’s declaration about the filtration grade of a specific filter.
This test method uses a Clogging Capacity Meter (CCM) device to compare the filtration grade of the
filter under test against the filtration grade of a test filtration screen.
NOTE This test method may also be used by a filter manufacturer to determine the filtration grade.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 9644, Agricultural irrigation equipment — Pressure losses in irrigation valves — Test method
3 Terms and definitions
For the purpose of this document, the following terms and def
...