Standard
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AS 4747.3-2013
[Pending Revision]Meters for non-urban water supply, Part 3: Technical requirements for open channel meters
Sets out requirements for water meters for use in non-urban applications in open channel and part-filled pipe applications. It Primarily applies to metering for irrigation water.
Published: 21/02/2013
Pages: 26
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope and general
1.1 Scope
1.2 Application
1.3 Normative references
1.4 Definitions
1.5 Preferred units
2 Materials
2.1 General
2.2 Resistance to corrosion
2.2.1 General
2.2.2 Corrosion-resistant materials
2.3 Material durability test—Ultraviolet light exposure
3 Methodology
3.1 General
3.2 Methods
4 Principles of measurement—Modular metering systems
4.1 Requirements related to specific technologies
4.2 Metering of partially filled pipes
4.3 Modular open channel metering systems
4.4 Velocity area methods
4.5 Flow computer
5 Principles of measurement—Self-contained units
5.1 General
5.2 Installation conditions
6 Design
6.1 Output
6.1.1 General
6.1.2 Flow rate
6.1.2.1 Mechanical meter
6.1.2.2 Electronic meter with mains power
6.1.2.3 Electronic meter with low-power supply
6.1.3 Flow volume
6.1.3.1 Mechanical meter
6.1.3.2 Electronic meter with mains power
6.1.3.3 Electronic meter with low-power supply
6.1.4 Data output
6.2 Electronic storage
6.3 Frequency of measurement
6.4 Frost protection
6.5 Alarm range
6.6 Leakage
7 Performance requirements
7.1 General
7.2 Pathways for compliance with this standard
7.2.1 General
7.2.2 Pathway for self-contained unit
7.2.2.1 Where pattern approval testing is possible
7.2.2.2 Where pattern approval testing is not possible
7.2.3 Pathway for modular metering systems
7.2.3.1 Where pattern approval testing is possible
7.2.3.2 Where pattern approval testing is not possible
7.3 Measurement of performance
7.3.1 General
7.3.1.1 General
7.3.1.2 Direct volumetric comparison
7.3.1.3 Indirect volumetric calculation
7.3.2 Performance requirements for direct volumetric comparisons
7.3.2.1 Laboratory testing
7.3.2.2 In situ testing
7.3.2.3 Laboratory in-service testing
7.3.3 Performance requirements for the indirect calculation of volume
8 Product documentation
Appendix A
A1 General
A2 Information to be supplied by the purchaser
A3 Information to be provided by the manufacturer
A4 Certificates of compliance
Appendix B
B1 Scope
B2 Relevance
B3 Product certification
B4 Sampling
B4.1 General
B4.2 Pattern approval
Appendix C
C1 Nature of errors
C2 Explanation of terms
C2.1 Uncertainty of measurement
C2.2 What is uncertainty of measurement?
C2.3 Error versus uncertainty
C2.4 True value and conventional true value
C2.5 Error and uncertainty in non-urban water metering
C2.5.1 Making the measurement
C2.5.2 Determination of true value
C2.5.3 Error or uncertainty
C2.5.4 Example of uncertainty calculation
Bibliography
Cited references in this standard
[Pending Revision]
Meters for non-urban water supply, Part 8: In-service compliance for non-urban water meters
ASTM A743
Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application
ASTM A480
Standard Specification for general Requirements for Flat-rolled Stainless and Heat-resisting Steel Plate, Sheet, and Strip
ASTM A276
Standard Specification for Stainless Steel Bars and Shapes
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