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Wellcome Bienvenue Willkommen Bienvenido Добро пожаловать ようこそ 歡迎

Wellcome Bienvenue Willkommen Bienvenido Добро пожаловать ようこそ 歡迎 . The Transit Time Clamp-on Flow Metering Technique. Introduction . Principle of operation. Modes of operation. Installation guidelines. Principle of operation. Sensor Block. Sensor Block. B. A. Liquid. Flow.

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Wellcome Bienvenue Willkommen Bienvenido Добро пожаловать ようこそ 歡迎

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  1. Wellcome Bienvenue Willkommen Bienvenido Добро пожаловать ようこそ 歡迎 UFM610

  2. The Transit Time Clamp-on Flow Metering Technique

  3. Introduction • Principle of operation. • Modes of operation. • Installation guidelines.

  4. Principle of operation Sensor Block Sensor Block B A Liquid Flow • The general principle of time of flight flow measurement. • The phase measurement system. • Modes of operation

  5. The general principle of time of flight flow measurement. Approximate relationship between fluid velocity and measured time. Does not include clamp on transducer delays. Vf = Flow velocity l = Distance between transducers Cf = Path length between transducer faces t = Transit-time downstream Kn = Profile correction factor  = Propagation angle

  6. Typical sound path for a clamp on ultrasonic meter Pipe cut through side view Transducers Steel Plastic Line represents path of sound wave Water

  7. The direct time measurement system  

  8. Modes of operation Sensor Block A Pipe wall Liquid Flow B Sensor Block Sensor Block Sensor Block B A Liquid Flow Pipe wall • Reflex mounting • ease of setup • good results over a • broad range of • applications • Diagonal mounting • extends the readable • pipe diameter for given • sensors • better for high flows • betterwith turbulent • applications

  9. Modes of operation Sensor Block Sensor Block B A Sensor Block Sensor Block B A Liquid Flow Pipe wall Liquid Flow Pipe wall • Double reflex mounting • ease of setup • useful forsmaller pipe • diameters • good on low flow rates • Triple reflex mounting • ease of setup • useful forsmaller pipe • diameters • good on low flow rates

  10. Installation guidelines • Transducer positioning. • Flow profiles

  11. Ultrasonic flow meter axial and radial sensor location

  12. Summary • Principle of operation. • Modes of operation. • Installation guidelines.

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