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Measurements & instrumentation
Aim:
To provide adequate knowledge in electrical instruments and measurements
techniques.
Objectives:
To make the student have a clear knowledge of the basic laws governing
the operation
of the instruments, relevant circuits and their working.
Introduction to general instrument system, error, calibration etc.
Emphasis is laid on analog and digital techniques used to measure voltage,
current, energy and power etc.
To have an adequate knowledge of comparison methods of measurement.
Elaborate discussion about storage & display devices.
Exposure to various transducers and data acquisition system.
UNIT I BASIC MEASUREMENT CONCEPTS
Measurement systems Static and dynamic characteristics Units and standards of measurements Error analysis & problemsMoving coil, moving iron meters Multimeters – True RMS meters Bridge measurements
Maxwell BridgeHay BridgeSchering BridgeAnderson BridgeWien Bridge.
UNIT II BASIC ELECTRONIC MEASUREMENTS
Electronic multimeters
constuction & workingCathode ray oscilloscopes
Block schematic – Applications Special oscilloscopes constuction & working
Q meters constuction & working
Vector meters constuction & working
RF voltage constuction & working
power measurements.
UNIT III SIGNAL GENERATORS AND ANALYZERS
Function generators
RF signal generators
Sweep generators
Frequency synthesizer
Wave analyzer
Harmonic distortion analyzer Spectrum analyzer
UNIT IV DIGITAL INSTRUMENTS
Comparison of analog and digital techniques
Digital voltmeter
Multimeters
Frequency counters
Measurement of frequency
and time interval
Extension of frequency range
Measurement errors
UNIT V DATA ACQUISITION SYSTEMS AND FIBER OPTIC MEASUREMENTS
oElements of a digital data acquisition system
o Interfacing of transducers
o Multiplexing
o Computer controlled instrumentation
oIEEE 488 bus
o Fiber optic measurements for power and system loss oOptical time domains reflectometer.
ASSIGNMENT TOPICS
1. Moving coil, moving iron meters construction & working
2. Bridge measurements – Maxwell – Hay – Schering – Anderson and Wien Bridge.
3. Cathode ray oscilloscopes – Block schematic diagram
4. Frequency synthesizer – Wave analyzer – Harmonic distortion analyzer – Spectrum analyzer.
5. Multimeters –Frequency counters
6. Elements of a digital data acquisition system– IEEE 488 bus –Optical time domains reflectometer.
SEMINOR TOPICS
Multimeters construction
Moving coil meters construction
Moving iron meters construction
Frequency synthesizer construction & working
Harmonic distortion analyzer working
Multiplexing
Computer controlled instrumentation
IEEE 488 bus
Function generators construction & working
Sweep generators construction & working
TEXT BOOK
Albert D. Helfrick, and William D. Cooper, “Modern Electronic Instrumentation and Measurement Techniques”, PHI, 2003.
REFERENCES
1. Joseph J. Carr, “Elements of Electronics Instrumentation and Measurement”, Pearson education, 2003.
2. Alan. S. Morris, “Principles of Measurements and nstrumentation”, 2nd Edition, PHI, 2003.
3. Ernest O. Doebelin, “Measurement Systems – Application and Design”, TMH, 2004.
4. A.K.Shawney, “Electrical & Electronics Measurements & Instrumentation”, Dhanpat Rai Publications