JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Prerequisite

Electrical Measurements & Instrumentation

Course Objectives:

• Instrumentation is essential in monitoring and analysis of any Physical system and its control.
• This course deals with different types of transducers, digital voltmeters, oscilloscopes, and measurement of non electrical quantities.

Course Outcomes

After completion of this course, the student will be able to

• Design and implement systems utilizing analog / digital control devices.
• Apply the concepts of automatic control, including measurement, feedback, and feed forward regulation for the operation of continuous and discrete systems.
• Solve technical problems and be proficient in the analysis, design, test, and implementation of instrumentation and control systems.
• Apply the concepts of heat transfer to the design of process control systems.
• Able to utilize modern and effective management skills for performing investigation, analysis, and synthesis in the implementation of automatic control systems.

UNIT - I

Characteristics of Signals and Their Representation: Measuring Systems, Performance Characteristics - Static characteristics, Dynamic Characteristics; Errors in Measurement - Gross Errors, Systematic Errors, Statistical Analysis of Random Errors. Signals and their representation: Standard Test, periodic, aperiodic, modulated signal, sampled data, pulse modulation, and pulse code modulation

UNIT - II

Oscilloscope and Digital Voltmeters: Cathode ray oscilloscope-Cathode ray tube-time base generator - horizontal and vertical amplifiers - CRO probes-applications of CRO - Measurement of phase and frequency - lissajous patterns - Sampling oscilloscope-analog and digital type. Digital voltmeters - Successive approximation, ramp, dual-Slope integration, continuous balance type - Micro processor based ramp type DVM, digital frequency meter - digital phase angle meter.

R16 B.TECH EEE.

UNIT - III

Signal Analyzers: Wave analyzers - Frequency selective analyzers, Heterodyne, Application of Wave analyzers - Harmonic Analyzers, Total Harmonic distortion, spectrum analyzers, Basic spectrum analyzers, spectral displays, vector impedance meter, Q meter. Peak reading and RMS voltmeters.

UNIT - IV

Transducers: Definition of transducers, Classification of transducers, Advantages of electrical transducers, Characteristics and choice of transducers; Principle of operation of resistor, inductor, LVDT and capacitor transducers; LVDT Applications, Strain gauge and its principle of operation, gauge factor, Thermistors, Thermocouples, Synchros, Piezo electric transducers, photovoltaic, photo conductive cells, photo diodes.

UNIT - V

Measurement of Non-Electrical Quantities: Measurement of strain, Gauge sensitivity, Displacement, Velocity, Angular Velocity, Acceleration, Force, Torque, Temperature, Pressure, Vacuum, Flow and Liquid level.

Text Books:

• 1. D. V. S Murthy, “Transducers and Instrumentation”, Prentice Hall of India, 2nd edition, 2009.
• 2. K. Sawhney, “A course in Electrical and Electronic Measurements and Instrumentation”, Dhanpatrai & Co., 12th edition, 2010.

Reference Books:

• 1. D O Doeblin, “Measurements Systems, Applications and Design”, TMH Publications, 5th edition, 2003.
• 2. D Helfrick and W. D. Cooper, “Modern Electronic Instrumentation and Measurement techniques”, Pearson/Prentice Hall of India, 12th edition, 2010.
• 3. S Morris, “Principles of Measurement and Instrumentation”, Pearson /Prentice Hall of India, 2 nd edition, 1994.
• 4. H. S. Kalsi, “Electronic Instrumentation”, Tata McGraw-Hill Edition, 1995, 1st edition, 1995. R16 B.TECH EEE.