sampling technique applied to measuring instruments
DESCRIPTION
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: [email protected] Website: www.ee.iitb.ac.in\ ~ tsrathor. 1. 1. 2. 2. - PowerPoint PPT PresentationTRANSCRIPT
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Sampling TechniqueSampling TechniqueApplied to Measuring Instruments Applied to Measuring Instruments
Dr T S Rathore, F IETE, F IE, M ISTEDr T S Rathore, F IETE, F IE, M ISTE
Department of Electrical EngineeringDepartment of Electrical Engineering
Indian Institute of Technology BombayIndian Institute of Technology Bombay
Powai, Mumbai 400 076Powai, Mumbai 400 076
email: [email protected] Website: www.ee.iitb.ac.in\~tsrathor
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1.
2.
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Sampling to find -
Types
- Asynchronous sampling
- Synchronous sampling
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where,
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Case I:
Case II:
But,
and
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1010
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1111
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1212
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1313
has to be zero
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1414
have to be zero
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1515
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1818
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1919
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a) Using analog wattmeter
Drawbacks-low torque- friction-Temperature errors- power loss- lack of balance- low band-width
1.
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b) Using digital wattmeter (Sampling wattmeter)
Asynchronous type
2121
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Truncation error
2222
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Synchronous type
2323
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2.
3.
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4.
-by converting current into proportional voltage
- by using difference amplifier to produce Vo IR
5. Volt amperes (VA), Reactive power, Power factor measurement
2525
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2626