Verification of Electrical Standards and Measuring Instruments1906 - Electric measurements - 8 pages |
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Common terms and phrases
50 amperes 50 per cent additional coil additional fee equal additional frequency additional instrument additional point additional temperature additional wave form ALTERNATING CURRENT alternating-current approved design approximately sine wave Calibration at five calibration at three calibration by means charged one-half Clark standard cells coefficient the extra corrections at five currents exceeding direct and alternating direct currents direct electromotive force DIRECT-CURRENT Ditto ELECTRICAL RESISTIVITY exceeding 1,000 amperes Exceeding 1,000 volts exceeding 100 kilowatts exceeding 25 kilowatts Exceeding 300 volts exceeding 500 amperes extra fee extra points charged five points FREQUENCY METERS instruments which admit kilowatts the charge means of direct number of Clark ohm standards Physikalisch-Technische Reichsanstalt points the additional POTENTIOMETERS RATIO COILS received for verification RESISTANCE APPARATUS resistance material Resistance of specimen RESISTANCE STANDARDS resistivity and conductivity sine wave form temperature coefficient three temperatures THREE-PHASE WATT-HOUR METERS triple scale instruments unless otherwise ordered voltage VOLTMETERS AND MILLIVOLTMETERS Weston cells WHEATSTONE BRIDGES