To introduce the meters used to measure current & voltage.
To have an adequate knowledge in the measurement techniques for power and energy,
power and energy meters are included.
To provide Elaborate discussion about potentiometer & instrument transformers.
To provide Detailed study of resistance measuring methods.
To provide Detailed study of inductance and capacitance measurement.
UNIT I MEASUREMENT OF VOLTAGE AND CURRENT 6+6
Galvanometers: – Ballistic, D’Arsonval galvanometer – Theory, calibration, application – Principle, construction, operation and comparison of moving coil, moving iron meters, dynamometer, induction type & thermal type meter, rectifier type – Extension of range and calibration of voltmeter and
ammeter – Errors and compensation.
UNIT II MEASUREMENT OF POWER AND ENERGY 6+6
Electrodynamometer type wattmeter: – Theory & its errors – Methods of correction – LPF wattmeter– Phantom loading – Induction type kWh meter – Induction type energy meter – Calibration of wattmeter and Energy meter.
UNIT III POTENTIOMETERS & INSTRUMENT TRANSFORMERS 6+6
DC potentiometer:– Basic circuit, standardization – Laboratory type (Crompton’s) – AC potentiometer:-Drysdale (polar type) type – Gall-Tinsley (coordinate) type – Limitations & applications – Instrument Transformer:-C.T and P.T construction, theory, operation and characteristics.
UNIT IV RESISTANCE MEASUREMENT 6+6
Measurement of low, medium & high resistance: – Ammeter, voltmeter method – Wheatstone bridge– Kelvin double bridge – Series and shunt type ohmmeter – High resistance measurement :-Loss of charge method, Megohm bridge method –Megger – Direct deflection methods – Price’s guardwiremethod – Earth resistance measurement.
UNIT V IMPEDANCE MEASUREMENT 6+6
A.C bridges:– Measurement of inductance, capacitance – Q of coil – Maxwell Bridge – Wein’s bridge– Schering bridge – Anderson bridge –Hay’s bridge- Campbell bridge to measure mutual inductance – Errors in A.C. bridge methods and their compensation – Detectors – Excited field – A.C.
galvanometer– Vibration galvanometer.
At the end of the course, the student should have the:
- Ability to measure current and voltage,
- Ability to understand AC and DC measurements.
- Ability to measure power and calibration of energy meters.
- Ability to measure current and voltage using potentiometric method.
- Ability to understand the resistance measurement
- Ability to use bridge circuit to measure resistance, inductance and capacitance.
- E.W. Golding &F.C.Widdis, ‘Electrical Measurements & Measuring Instruments’, A.H.Wheeler& Co, 2001 H.S. Kalsi, Electronic Instrumentation, McGraw-Hill Education, New Delhi, 2010
- A.K. Sawhney, A Course in Electrical & Electronic Measurements & Instrumentation, Dhanpat Rai and Co, New Delhi, 2010.
- S.K.Singh, ‘Industrial Instrumentation and control’, Tata McGraw Hill, 2nd edn., 2002.
- J.B.Gupta, ‘A Course in Electronic and Electrical Measurements and
- Instrumentation’,S.K.Kataria& Sons, Delhi, 2003.
- Martin U. Reissland, ‘Electrical Measurement – Fundamental Concepts and Applications’, New Age International (P) Ltd., 2001.
- R.B. Northrop, Introduction to Instrumentation and Measurements, Taylor & Francis, New Delhi, 2008.
- M.M.S. Anand, “Electronics Instruments and Instrumentation Technology”, Prentice Hall India, NewDelhi, 2009.
- J.J. Carr, “Elements of Electronic Instrumentation and Measurement”, Pearson Education India, New Delhi, 2011.