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 69
As the figures are needed in testing work, theyshould always be recorded. The sensibility of a Weston instrument type B orof the portable form is about 10,000 ohms. One 46 ELECTRICAL INSTRUMENTS. scale division of deflection represents one. voltthrough 10,000 ohms if 100 divisions equal onevolt… … 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
Electric testing · Electric apparatus and appliances
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