ELE –401 ELECTRICAL MEASURMENTS

Control and damping of indicating type instruments in general, Ammeter & voltmeter permanent magnet moving coil type, moving iron type, electrodynamics type, their scale shape, wattmeter, electrodynamics type, induction type, single phase and three phase.

Energy meter: Induction type, A.C. single phase and three-phase energy meter, testing of AC energy meter.

Galvanometers: Construction and performance equation of vibration, ballistic galvemeter.

Frequency meter: Vibrating reed types, electrical resonate type, power factor meters, and dynamometer type.

Potentiometer: DC and AC (Polar and rectangular coordinate) type standardization and application.

AC Bridge: Schering, Anderson bridge, maxwell’s bridge, error, magnetic and electromagnetic shielding, Wanger’s earthing devices.

Measurement of Resistance: High resistance by Megger low resistance by Kelvins double bridge.

Electronic Voltmeter: VIVM peak reading triode type, Transistors voltmeters with cascaded transistors.

Transducer and Signal Conditioning: Displacement transducers, the L.V.D.T. variable reluctance, variable capacitance type, Op-Amp configuration for measurement, strain gauge, gauss factor, strain gauge bridge circuit, methods of balancing, Piezoelectric and servotype accelerator. Bridge amplifier using Op-Amp. Temperature Measurement, resistance thermometer, thermocouples, thermisters, effects of referance junction, compensation thermocouple indicator and thermocouple amplifier.

TEXT BOOKS:

1. Instrumentation (Devices and Systems) –C.S. Rangan, C.R. Sharma, V.S.V Mani T.M. P. Publication.

2. Electrical and Electronic Measurements and Instrumentation –A.K. Sawhney

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