Practical applied electricity; a book in plain English, for the practical man. Theory, practical applications and examples (1911)
Moreton, David Penn, 1882- · Chicago, The Reilly & Britton co · leaf 172
g. 121, where (S) represents thestandard instrument, (X) the instrument to be calibrated,and (R) a suitable rheostat for varying the pressure overthe voltmeter terminals. 170. Calibration of Voltmeters by Means of a Potentiome-ter.—The potentiator is a special arrangement for meas-uring an… … Fig. 120 162 PKACTICAL APPLIED ELECTKICITY
Electrical engineering
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