AS 3565.2-2004

1 - AS 3565.2-2004 METERS FOR WATER SUPPLY - 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
7 - 1.4 DEFINITIONS
7 - 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 permissible error of measurement
7 - 1.4.5 Minimum flow rate (Q1)
7 - 1.4.6 Overload flow rate (Q4)
7 - 1.4.7 Permanent flow rate (Q3)
7 - 1.4.8 Pressure loss (delta p)
7 - 1.5 DESIGNATION OF SIZE
8 - 1.6 DESIGNATION OF CAPACITY
8 - 1.7 PREFERRED FLOW RATES
8 - 1.8 DIMENSIONS
8 - 1.9 MARKINGS
8 - 1.9.1 Identification marks
8 - 1.9.2 Verification marks
9 - SECTION 2 MATERIALS AND COMPONENTS
9 - 2.1 MATERIALS
9 - 2.2 END CONNECTIONS
9 - 2.3 REGISTERS
9 - 2.3.1 General
9 - 2.3.2 Register design
9 - 2.3.3 Number of decades
9 - 2.3.4 Indicators
9 - 2.3.5 Verification scale
10 - 2.4 CALIBRATION ADJUSTMENT DEVICE
10 - 2.5 PROTECTIVE DEVICES
11 - SECTION 3 PERFORMANCE REQUIREMENTS
11 - 3.1 GENERAL
11 - 3.2 ULTRAVIOLET LIGHT EXPOSURE
11 - 3.3 WATERTIGHTNESS
11 - 3.3.1 General
11 - 3.3.2 Type test
11 - 3.3.3 Batch test
11 - 3.4 CHANGEOVER FLOW RATE TEST
11 - 3.5 REVERSE FLOW
11 - 3.6 PRESSURE LOSS
11 - 3.7 MAXIMUM PERMISSIBLE ERROR OF MEASUREMENT
11 - 3.7.1 General
11 - 3.7.2 MPE lower flow range
12 - 3.7.3 MPE upper flow range
12 - 3.8 ENDURANCE
13 - SECTION 4 PERFORMANCE TESTS
13 - 4.1 TESTS AND SEQUENCE
13 - 4.1.1 General
13 - 4.1.2 Pattern approval
13 - 4.1.3 Type tests
13 - 4.2 APPARATUS
14 - APPENDIX A - MEANS FOR DEMONSTRATING COMPLIANCE WITH THIS STANDARD
14 - A1 SCOPE
14 - A2 RELEVANCE
14 - A3 PRODUCT CERTIFICATION
14 - A3.1 Definitions
15 - A3.2 Batch release test (BRT)
15 - A3.3 Type testing (TT)
15 - A4 TESTING
15 - A4.1 General
15 - A4.2 Type testing sampling
15 - A4.3 Retesting
15 - A4.4 Pattern approval
15 - A4.5 Acceptability of tests
17 - APPENDIX B - PURCHASING GUIDELINES
17 - B1 GENERAL
17 - B2 INFORMATION TO BE SUPPLIED BY THE PURCHASER
17 - B3 CERTIFICATE OF COMPLIANCE
18 - APPENDIX C - METROLOGICAL REQUIREMENTS
18 - C1 SCOPE
18 - C2 METROLOGICAL DATA
18 - C3 TECHNICAL DATA
20 - APPENDIX D - CHANGEOVER FLOW RATE TEST
20 - D1 SCOPE
20 - D2 PRINCIPLE
20 - D3 APPARATUS
20 - D4 PROCEDURE
21 - D5 REPORT
22 - APPENDIX E - PRESSURE LOSS TEST
22 - E1 SCOPE
22 - E2 PRINCIPLE
22 - E3 APPARATUS
22 - E4 PROCEDURE
23 - E5 CALCULATIONS
23 - E6 REPORT
24 - APPENDIX F - ENDURANCE TEST
24 - F1 SCOPE
24 - F2 PRINCIPLE
24 - F3 APPARATUS
24 - F4 PROCEDURE
25 - 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 specified accuracy limits, the volume of cold drinking water at working temperature range of 0.3 degrees Celsius to 30 degrees Celsius and pressure not exceeding 1400 kPa, respectively.

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 specified accuracy limits, the volume of cold drinking water at working temperature range of 0.3°C to 30°C and pressure not exceeding 1400 kPa, respectively. This Standard is applicable to combination meters that are capable of operating at intermittent temperatures of at least 50°C, which may be fitted with electronic output devices (EOD), are self-contained and capable of continuously determining, within the accuracy limits of the meter the volume of cold drinking water that has flowed through them, and are continuously indicating the volume on a cumulative basis. Such volume being 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. Means for demonstrating compliance with this Standard are given in Appendix A NOTE: Purchasing guidelines are given in Appendix B.

First published as AS 3565.2-1996.
Second edition 2004.