Precision Electrical Measurements |
Contents
SESSION 2 | |
Inductance standards and the calibration of search coils | |
SESSION 3 | P-3 |
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accuracy adjusted admittance alloys alternating amplifier applied approximately audio frequencies breakdown voltage bridge British Electricity Authority cable calculated calibration capacitance cavity chopped wave circuit connexion constant constantan constructed copper detection detector developed diameter dielectric dielectric constant direct current dynamometer earth effect electrical electrode electrostatic Engrs error factor fault flashover frequency range full wave gold-chromium heater high-voltage impedance impulse tests impulse voltages indication inductance inductors Instn instrument insulation kc/s manganese manganin material Mc/s measurements method Mumetal National Physical Laboratory neutral current nickel obtained ohms oscillator oscillograms output paper permeability permeameter permittivity potentiometer precision primary standard properties ratio Research resistance alloys resistors resonance sample screen search coil short-circuit shown shunt specimen sphere-gap spheres stability standard resistors supply temperature coefficient terminal thermal converter thermocouple torque transformer tube voltage divider voltmeter wattmeter winding wire zero