Modern practice of the electric telegraph. A handbook for electricians and operators (1872)
Pope, Frank L. (Franklin Leonard), 1840-1895 · New York : D. Van Nostrand · leaf 95
o be tested as short as possible,and have all the instruments in circuit taken out. Se-lect a good wire, similar, if possible, to the one it isrequired to test. Both these wires must then be con-nected together in a loop, at the nearest available sta-tion beyond the fault, without ground… … Connect one end of the loop to the + pole of thebattery E, and the other to one of the galvanometerwires at M. Connect also the + pole of the batterywith the resistance coils, R, at N, and the — pole ofthe battery to the key, K, and common terminal, a, ofthe galvanometer. Connect the remaining…
Telegraph
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