Electrical Measurements and Instrumentation

The book contains: Measuring Instruments: Classification, Absolute and secondary instruments, indicating instruments, control, balancing and damping, constructional details, characteristics, errors in measurement, Ammeters, voltmeters: (DC/ AC) PMMC, MI, Electrodynamometer type Watt-meters: Electrodynamometer type, induction type, single phase and three phase watt-meter, compensation, Energy-meters: AC. Induction type single phase and three phase energy meter, compensation, creep, error, testing, Frequency Meters: Vibrating reed type, electrical resonance type. DC/ AC Bridges: General equations for bridge balance, measurement of self inductance by Maxwell¿s bridge (with variable inductance & variable capacitance), Hay¿s bridge, Owen¿s bridge, measurement of capacitance by Schearing bridge, errors, Wagner¿s earthing device, Kelvin¿s double bridge. Transducer: Strain Gauges, Thermistors, Thermocouples, Linear Variable Differential Transformer (LVDT), Capacitive Transducers, Peizo-Electric transducers, Optical Transducer, Torque meters, inductive torque transducers, electric tachometers, photo-electric tachometers, Hall Effect Transducer.