Electrical Measurements in Principle and Practice |
Contents
CHAPTER IISTANDARDS ΙΟ | 10 |
CHAPTER IIIACCURACY CONSIDERATIONS | 19 |
PART II | 29 |
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accuracy adjusted alternating current ammeter ampere-hour amperes angle anode apparatus applied balance ballistic galvanometer battery bridge cable calibrated capacitance cell circuit comprises condenser conductor connected constant core cycles per second damping decibel deflection dial direct current disc dynamometer earth electrical electrodes electrostatic voltmeter equal error fault flux frequency galvanometer grid indicating instrument instru insulation resistance lamp length linear load magnetic field magnetising maximum means measured megohms ment meter method metre milliammeter movement moving coil instrument moving iron instrument mutual inductance necessary null obtained ohmmeter ohms operation overload permanent magnet photometer pivots pointer possible potential divider potentiometer power factor practice proportional pyrometer r.m.s. value R₁ R₂ range ratio reactance reading selector switch sensitivity series resistance shows shunt slide wire standard suitable supply temperature test set thermal thermo-couple torque usually V₁ V₂ valve variable varying volt-amperes voltage volts wattmeter wave-form Wheatstone bridge Whilst winding zero