Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 639
nstants. Methods of Checking. — One of the two methods mentioned beloware recommended, circumstances dictating which of the two is the better.First method is to compare the instrument to be checked with a standardindicating wattmeter, and timing the disk. Second method is by comparing with a… … STANDARD INDICATING WATTMETER Fig. 28. Load the circuit until the desired reading is obtained on the indicatingwattmeter, and keep it at a constant value while the integrating wattmeteris being read. Time the revolutions of the disk with a stop-watch, com-mencing to count when the spot on the disk…
Electrical engineering
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