AS 3565.2-1996

1 - AS 3565.2-1996 METERS FOR COLD POTABLE WATER - COMBINATION METERS
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE AND GENERAL
6 - 1.1 SCOPE
6 - 1.2 INTERPRETATION
6 - 1.3 REFERENCED DOCUMENTS
6 - 1.4 DEFINITIONS
6 - 1.4.1 Changeover flow rate
7 - 1.4.2 Flow rate (Q)
7 - 1.4.3 Flow rate range
7 - 1.4.4 Maximum intermittent flow rate
7 - 1.4.5 Maximum permissible error of measurement
7 - 1.4.6 Measurement class
7 - 1.4.7 Minimum flow rate
7 - 1.4.8 Nominal flow rate
7 - 1.4.9 Pressure loss
7 - 1.5 DESIGNATION OF SIZE
7 - 1.6 DESIGNATION OF CAPACITY
7 - 1.7 DIMENSIONS
7 - 1.8 MARKINGS
7 - 1.8.1 Identification marks
7 - 1.8.2 Verification marks
7 - 1.9 AUSTRALIAN WATER AGENCIES
8 - SECTION 2 MATERIALS AND COMPONENTS
8 - 2.1 MATERIALS
8 - 2.2 END CONNECTIONS
8 - 2.3 REGISTERS
8 - 2.3.1 General
8 - 2.3.2 Register design
8 - 2.3.3 Number of decades
8 - 2.3.4 Indicators
8 - 2.3.5 Verification scale
9 - 2.4 ELECTRONIC OUTPUT DEVICE (EOD)
9 - 2.5 CALIBRATION ADJUSTMENT DEVICE
9 - 2.6 PROTECTIVE DEVICES
10 - SECTION 3 PERFORMANCE REQUIREMENTS
10 - 3.1 GENERAL
10 - 3.2 MEASUREMENT CLASS
10 - 3.3 WATERTIGHTNESS
10 - 3.4 CHANGEOVER FLOW RATE TEST
10 - 3.5 PRESSURE LOSS TEST
10 - 3.6 MAXIMUM PERMISSIBLE ERROR OF MEASUREMENT
10 - 3.7 ENDURANCE
11 - SECTION 4 PERFORMANCE TESTS
11 - 4.1 TESTS AND SEQUENCE
11 - 4.2 APPARATUS
12 - APPENDIX A - PURCHASING GUIDELINES
12 - A1 GENERAL
12 - A2 INFORMATION TO BE SUPPLIED BY THE PURCHASER
12 - A3 CERTIFICATES
12 - A3.1 Certificate of compliance
12 - A3.2 Test certificate
13 - APPENDIX B - TECHNICAL DATA
13 - B1 SCOPE
13 - B2 TECHNICAL DATA
15 - APPENDIX C - AUSTRALIAN WATER AGENCIES - COMPLIANCE REQUIREMENTS
16 - APPENDIX D - CHANGEOVER FLOW RATE TEST
16 - D1 SCOPE
16 - D2 PRINCIPLE
16 - D3 APPARATUS
16 - D4 PROCEDURE (See Figure I1 of AS 3565.1)
17 - D5 REPORT
18 - APPENDIX E - PRESSURE LOSS TEST
18 - E1 SCOPE
18 - E2 PRINCIPLE
18 - E3 APPARATUS
18 - E4 PROCEDURE (See Figure I1 of AS 3565.1)
19 - E5 CALCULATIONS
19 - E6 REPORT
20 - APPENDIX F - ENDURANCE TEST
20 - F1 SCOPE
20 - F2 PRINCIPLE
20 - F3 APPARATUS
20 - F4 PROCEDURE (See Figure K1 of AS 3565.1)
20 - F5 REPORT

Specifies the requirements for combination meters, with nominal flow rates not exceeding 150 kL/h and consisting of one small meter and one large meter in parallel, with a changeover device. These combination meters are intended for installation in water services, to measure within the accuracy of its Class, the volume of cold potable water at working temperatures and pressures not exceeding 30 degrees Celsius and 1400 kPa, respectively. These combination meters shall be capable of operating at working temperatures of at least 50 degrees Celsius and may be fitted with electronic output devices (EOD).

This Standard specifies requirements for combination meters with nominal flow rates not exceeding 150 kL/h and consisting of one small meter and one large meter in parallel, with a changeover device. These combination meters are intended for installation in water services, to measure within the accuracy limits of the Class, the volume of cold potable water at working temperatures and pressures not exceeding 30C and 1400 kPa, respectively. This Standard is applicable to combination meters which are capable of operating at working temperatures of at least 50C and may be fitted with electronic output devices (EOD), which are self-contained and capable of continuously determining within the accuracy limits of the Class, the volume of cold potable water which has flowed through them, and which are continuously indicating the volume on a cumulative basis. Such volume is equal to either -(a) the sum of the volumes shown on the registers of the small and large meters; or(b) the volume shown on the single register for both the small and large meters.NOTE: Purchasing guidelines are given in Appendix A.

First published as AS 3565.2-1996.