Principles of Electrical Measurements |
Contents
CHAPTER | 1 |
MOVINGIRON INSTRUMENTS | 8 |
ELECTRODYNAMIC INSTRUMENTSIRONCORED TYPE | 18 |
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accuracy adjustment alternating current ammeter ampere anode anode current applied balance condition C₁ C₂ calibration capacitance capacitor Carey Foster cathode condenser connected constant convenient current coil damping deflection detector dielectric difference dimensions direct current disc earth effect electric electrodes electrodynamic electrostatic equal equation error factor field flux galvanometer grid harmonic Hence I₁ impedance indication insulation kc/s magnetic magnitude Manganin means measurements meter method metre movement moving coil moving-iron mutual inductance necessary obtained operating oscillator oscillograph phase phase-angle plate pointer position potential potentiometer power-factor precision quadrature R₁ R₂ range ratio arms reactance reading rectifier resistance box resistor resonance scale screen sensitivity shown in Fig shunt slide-wire standard cell suitable supply switch symmetrical components temperature coefficient torque transformer units V₁ V₂ valve voltmeter variable vector volt voltage voltage coil voltmeter wattmeter waveform Wheatstone bridge winding wire Z₁ zero