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 206
wires of a shunt machine are disconnected.Current from 5 passes through the armature coils,ammeter, and resistance lamps. TESTING WITH VOLTMETER. 183 The connections may be made with copper wiremaking good contact on commutator segments byinserting them under brushes SB of oppositepolarity. The… … Fig. 102. Readings are taken of the e.m.f. between thesegments to which the connections of the currentcircuit are made. Readings are also taken of the current indicatedby the ammeter. Then by ohms law, the resistance equals thee.m.f. divided by the current. For example, let the current I be one…
Electric testing · Electric apparatus and appliances
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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