1 History of Water Measurement and Development of Water Meters
2 Selecting Meter Types
3 Effects of Water‑Flow Friction, Increased Usage, and Pressure Losses on Service Adequacy
4 Meter Installation
5 Testing of Meters—Test Procedures and Equipment
6 Maintenance and Repair of Water Meters
7 Maintenance Shop Layout and Equipment
8 Meter Records
9 Remote Registration
1 History of Water Measurement and Development of Water Meters
p 1 , Water supply in ancient times
roman – supply จาก Tiber river , wells , springs
great aequduct Appian
p 3 , astonish ประหลาดใจ develop – metal pipe , pipe fitting , plug cocks , inverted siphons ,ornate foundtains ,bath
measurement and filtration
!p 8 , Current and Turbine Meters
1970 Benjamin G.Hoffman ,วัด flowing air and water
very ligth waterwheel -operate by current and carrying – axis worm for actuating gearing and totalizer
rate of flow วัดจาก rotation
1910 American – ASME – earliest type of current meter
Woltman modified
! p 11 , The Venturi Meter – measurement of flowing water under p. – Clemens Herschel’s invention 1886
hydraulic engineer c holyoke (Mass)
tube base on Italian scientist Giovanni Venturi 1746-1822
flow of liquid ผ่น converging pipe – gain velocity , lowering p – ในขณะที่ reverse true in diverging pipe
2 Selecting Meter Types
3 Effects of Water‑Flow Friction, Increased Usage, and Pressure Losses on Service Adequacy
4 Meter Installation
5 Testing of Meters—Test Procedures and Equipment
6 Maintenance and Repair of Water Meters
7 Maintenance Shop Layout and Equipment
8 Meter Records
9 Remote Registration