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 73
er left scale reading and thaton the lower left scale directly underneath it, the 50 ELECTRICAL INSTRUMENTS. total will be 500. And subtracting the upper .read-ing from the lower reading on the right scale alsogives 500. Differential Voltmeters. Differential voltmetershave a central zero and are… … Fig. 38 are equal. The needle points towards the side ofhigher e.m.f. When the two generators are being operated, thereadings on either side must not be taken to rep-resent the e.m.f. of that particular generator.The readings indicate the difference between thegenerators. Double Scale Instruments.…
Electric testing · Electric apparatus and appliances
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