Electrical Measurements Manual |
Contents
Laboratory Techniques | 1 |
DArsonval Meters | 15 |
Current Galvanometers | 18 |
Copyright | |
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a-c circuit A-C Source A₁ accordance with Fig accuracy Adjustable resistor Adjustable voltage divider ampere ballistic galvanometer battery bridge circuit Calculate calibration capacitance capacitor Cathode-Ray Oscillograph cent registration Conclusions Connect the equipment current and voltage current coils D-c ammeter D-c milliammeter D-c voltmeter d'Arsonval damping data and plot Decade resistor determine Electrodynamometer Equipment D-c equipment in accordance error experiment filament voltage flux density galvanometer graph grid voltage half-scale resistance inductor instructor instrument internal impedance Kirchhoff's Kirchhoff's voltage law laboratory load current obtained ohmmeter phase sequence plate current plate voltage potential coil potentiometer power factor Procedure Connect quantities R₁ R₂ ratio reference current Repeat scale shown in Fig shunt superposition principle supply voltage swamping resistor Take data terminals Thevenin's theorem torque transformer triode tube unity power factor unknown resistor unknown voltage upscale usually volt voltage and current voltage divider watthour meter wattmeter wave forms Wheatstone bridge zero