Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 820
are connected in parallel circuit in NON COMMUTATOR AMMETER AND VOLTMETER. 799 the ammeter and in series in the voltmeter, permanently. Inother respects they are substantially the same as the commu-tator instruments. Owing to the small deflection given by astandard cell with these instruments, they… … Fig. 506. that all should be provided with commutators for easy calibra-tion. It is sufficient that a few of the ammeters and voltmetersshould have commutators for independent calibration, the re-mainder being calibrated by direct comparison with those havingcommutator attachments. To partially…
Electrical engineering
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