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 70
Fig. 34. tion. One scale division hare representing one volt would equal 15000 of an ampere. Switchboard Type. The energy necessary tooperate the Weston switchboard type does notexceed .05 of one per cent, of the total energy beingmeasured. VOLTMETERS AND AMMETERS. 47 … Fig. 35.
Electric testing · Electric apparatus and appliances
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