High frequency apparatus, design, construction and practical application; a practical treatise for electrical engineers, electricans, physicians, students and experimenters (1920)
Curtis, Thomas Stanley · New York, Norman W. Henley publishing company · leaf 168
The meter may be covered with a suitable case, pre-ferably of wood if the instrument is to be used on highfrequency currents. The mechanism is, of course, coveredby the case which has an opening cut in it to show thescale. The latter should be made as the instrument iscalibrated. If no standard… … Fig. 84.—The Meter pivot. Showing connections for calibration i amp. and by adding one lamp at a time and marking theJ scale in half ampere divisions, a fairly correct scale will be■j the result. Various shunts should be experimented withduring the first tests in order that the correct one may…
Electric apparatus and appliances
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