# Electrical Measurements & Instrumentation

 Course Code : EE501PC Author : uLektz University : Jawaharlal Nehru Technological University, Hyderabad (JNTUH) Regulation : 2018 Categories : Electrical & Electronics Format : ePUB3 (DRM Protected) Type : eBook

FREE

Description :Electrical Measurements & Instrumentation of EE501PC covers the latest syllabus prescribed by Jawaharlal Nehru Technological University, Hyderabad (JNTUH) for regulation 2018. Author: uLektz, Published by uLektz Learning Solutions Private Limited.

Note : No printed book. Only ebook. Access eBook using uLektz apps for Android, iOS and Windows Desktop PC.

##### Topics
###### UNIT I INTRODUCTION TO MEASURING INSTRUMENTS

1.1 Classification – Deflecting, control and damping torques

1.2 Ammeters and Voltmeters - PMMC, moving iron type instruments – expression for the deflecting torque and control torque

1.3 Errors and compensations– Extension of range using shunts and series resistance

1.4 Electrostatic Voltmeters - electrometer type and attracted disc type – extension of range of E.S. Voltmeters

###### UNIT II POTENTIOMETERS & INSTRUMENT TRANSFORMERS

2.1 Principle and operation of D.C. Crompton’s potentiometer – standardization - Measurement of unknown resistance, current, voltage

2.2 A.C. Potentiometers: polar and coordinate type’s standardization – applications

2.3 CT and PT - Ratio and phase angle errors

###### UNIT III MEASUREMENT OF POWER & ENERGY

3.1 Single phase dynamometer wattmeter, LPF and UPF

3.2 Double element and three element dynamometer wattmeter - Expression for deflecting and control torques

3.3 Extension of range of wattmeter using instrument transformers - Measurement of active and reactive powers in balanced and unbalanced systems

3.4 Single phase induction type energy meter – driving and braking torques – errors and compensations

3.5 Testing by phantom loading using R.S.S. Meter - Three phase energy meter - tri-vector meter, maximum demand meters

###### UNIT IV DC & AC BRIDGES

4.1 Method of measuring low, medium and high resistance - sensitivity of Wheat-stone’s bridge – Carey Foster’s bridge, Kelvin’s double bridge for measuring low resistance

4.2 Measurement of high resistance – loss of charge method

4.3 Measurement of inductance - Maxwell’s bridge, Hay’s bridge, Anderson’s bridge - Owen’s bridge

4.4 Measurement of capacitance and loss angle – Desaunty’s Bridge - Wien’s bridge – Schering Bridge

###### UNIT-V TRANSDUCERS

5.1 Definition of transducers

5.2 Classification of Transducers, Advantages of Electrical transducers

5.3 Characteristics and choice of transducers

5.4 Principle operation of LVDT and capacitor transducers; LVDT Applications

5.5 Strain gauge and its principle of operation, gauge factor

5.6 Thermistors, Thermocouples, Piezo electric transducers, photovoltaic, photo conductive cells and photo diodes

5.7 Measurement of Non-Electrical Quantities: Measurement of strain, Gauge sensitivity, Displacement, Velocity, Angular Velocity, Acceleration, Force, Torque, Temperature, Pressure, Vacuum

5.9 Measurement of Flow, Liquid level