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 89
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… … Fig. 55. in Fig. 53, the switchboard ammeter in Fig. 54,and the switchboard edgewise M voltmeter withiron vane moving system in Fig. 55. The am-meters below 500 amperes total scale are series,the entire current passing through the instrument.Although the above type may be used on direct VOLTMETERS…
Electric testing · Electric apparatus and appliances
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