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 237
urement by reversing the wires 214 ELECTRICAL INSTRUMENTS. leading to his bridge and make a third test, seeingwhether or not this test checks correctly with theprevious one. Fig. 122 shows the connections forthis check measurement, the formula for which is (L + R)XA (2.5 + 97) X 10 _/<- A+B , or… … Fig. 122. It will readily be seen that instead of connectingthe battery to the second crossed conductor asshown in Figs. 121 and 122, it could just as wellbe grounded and then the second crossed conductorgrounded, as is shown in the case of overhead-wiremeasurement, Fig. 113. In cases where the…
Electric testing · Electric apparatus and appliances
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