Electrical instruments and testing; how to use the voltmeter, ohmmeter, ammeter, potentiometer, galvanometer, the Wheatstone bridge, and standard portable testing sets (1907)
Schneider, Norman H. (Norman Hugh), Hargrave, Jesse · New York, Spon & Chamberlain; [etc., etc.] · leaf 88
lined. A soft iron vane is mounted obliquely on ashaft which latter is held in a vertical positionand controlled by springs. The shaft also carries a pointer moving over agraduated dial. VOLTMETERS AND AMMETERS. 65 When current is sent through the coil the vaneturns against the springs so as to set… … Fig. 54. The voltmeter has a similarly placed stationarycoil, but in place of the iron vane is equippedwith a moving coil in series with the other coil. The pointer is carried by the moving coil sys-tem which is controlled by springs. 66 ELECTRICAL INSTRUMENTS. This type of instrument can also be…
Electric testing · Electric apparatus and appliances
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