ISO 16399:2023
(Main)Agricultural irrigation equipment — Meters for irrigation water
Agricultural irrigation equipment — Meters for irrigation water
This document specifies the requirements and certification procedures for water meters, irrespective of the design technologies used to meter the actual volume of cold water or heated water flowing through a fully charged closed conduit. These water meters incorporate devices, which indicate the integrated volume. It applies to water meters intended for irrigation use (herein after referred to as water meters), regardless of the water quality used for this purpose. This document also applies to water meters based on electrical or electronic principles and to water meters based on mechanical principles, incorporating electronic devices used to meter the actual volume flow of cold water. It provides metrological requirements for electronic ancillary devices when they are subject to metrological control. NOTE Clean water meters are different from irrigation water meters. This document is based on clean water meters standards but, it is important to develop a specific standard for irrigation water meters indicating their specific requirements.
Matériel d'irrigation agricole — Compteurs pour l'eau d'irrigation
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 16399
Second edition
2023-02
Agricultural irrigation equipment —
Meters for irrigation water
Matériel d'irrigation agricole — Compteurs pour l'eau d'irrigation
Reference number
© ISO 2023
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Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Metrological requirements . .5
4.1 Values of Q , Q , Q and Q . 5
1 2 3 4
4.1.1 Permanent flow rate (Q ) . 5
4.1.2 Measuring range . 6
4.1.3 Relationship between permanent flow rate (Q ) and overload flow rate (Q ) . 6
3 4
4.1.4 The ratio Q /Q shall be 1,6 . 6
2 1
4.2 Maximum permissible error (MPE) . 6
4.2.1 Formulation . 6
4.2.2 Accuracy class . 7
4.2.3 Meter temperature classes . 7
4.2.4 Reverse flow . 7
4.2.5 Absence of flow or of water . 8
4.2.6 Static pressure . 8
4.3 Requirements for meters and ancillary devices . 8
5 Water meters equipped with electronic devices . 8
6 Technical characteristics .8
6.1 Materials and construction of water meters . 8
6.2 Adjustment and correction . . 9
6.3 Installation conditions . 9
6.4 Rated operating conditions . 9
6.5 Pressure loss . 10
6.6 Marks and inscriptions . 10
6.7 Indicating device . . 11
6.7.1 General requirements . 11
6.7.2 Types of indicating device .12
6.8 Sealing and security .13
6.8.1 Meter security and protection against manipulations .13
6.8.2 Mechanical protection devices . 13
6.8.3 Electronic sealing devices . 13
6.9 Other devices .13
7 Performance tests .13
7.1 General conditions for the tests . 13
7.1.1 Water quality .13
7.1.2 Reference conditions . 14
7.1.3 General rules concerning test installation and location . 14
7.2 Static pressure test . 14
7.2.1 General . 14
7.2.2 Preparation . 14
7.2.3 Test procedure.15
7.2.4 Acceptance criteria . 15
7.3 Determination of errors . 15
7.3.1 General .15
7.3.2 Preparation .15
7.3.3 Test procedure. 21
7.3.4 Acceptance criteria . 21
7.4 Pressure loss test . 21
7.4.1 General . 21
7.4.2 Preparation . 21
iii
7.4.3 Test procedure.22
7.4.4 Calculation of the actual Δp of a water meter. 24
7.4.5 Acceptance criteria . 24
7.5 Reverse flow test . 24
7.5.1 General . 24
7.5.2 Preparation . 24
7.5.3 Test procedure. 24
7.5.4 Acceptance criteria . 25
7.6 Flow disturbance tests . 25
7.6.1 General . 25
7.6.2 Objective of the test .26
7.6.3 Preparation . 26
7.6.4 Test procedure.26
7.6.5 Acceptance criteria . 26
7.7 Endurance tests .28
7.7.1 Durability test .28
7.7.2 Resistance to solid particles test . 33
7.8 Magnetic field testing . 35
7.9 Test on ancillary devices of a water meter . 35
8 Tests related to the influence quantities and perturbations .35
Annex A (informative) Pulse input solutions .36
Annex B (normative) Flow disturbers .42
Bibliography .
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