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Sampling Technique Applied to Measuring Instruments

Sampling Technique Applied to Measuring Instruments. Dr T S Rathore, F IETE, F IE, M ISTE Department of Electrical Engineering Indian Institute of Technology Bombay Powai, Mumbai 400 076. email: tsrathor@ee.iitb.ac.in Website: www.ee.iitb.ac.in ~ tsrathor. 1. 1. 2. 2.

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Sampling Technique Applied to Measuring Instruments

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  1. Sampling TechniqueApplied to Measuring Instruments Dr T S Rathore, F IETE, F IE, M ISTE Department of Electrical Engineering Indian Institute of Technology Bombay Powai, Mumbai 400 076 email: tsrathor@ee.iitb.ac.in Website: www.ee.iitb.ac.in\~tsrathor 1

  2. 1. 2. 2

  3. Sampling to find - Types - Asynchronous sampling - Synchronous sampling 3

  4. where, 4

  5. 5

  6. But, Case I: and Case II: 6

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  13. has to be zero 13

  14. have to be zero 14

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  20. 1. a) Using analog wattmeter Drawbacks • low torque • friction • Temperature errors • power loss • lack of balance • low band-width 20

  21. b) Using digital wattmeter (Sampling wattmeter) Asynchronous type 21

  22. Truncation error 22

  23. Synchronous type 23

  24. 2. 3. 24

  25. 4. • by converting current into proportional voltage • by using difference amplifier to produce Vo IR 5. Volt amperes (VA), Reactive power, Power factor measurement 25

  26. Thanks Any ? 26

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