An experimental study of the fahy permeameter (1918)
National Bureau of Standards · leaf 19
fthe Bureau. These standards have been carefully prepared andaged. They have been examined for magnetic uniformity andare the best magnetic standards at present obtainable. The magnetic characteristics are shown in Figs. 7 and 8. It isto be noticed how completely these bars cover the full range… … 0 H — Fig. 7.—Normal induction curves for the standard bars for magnetizing forces up to 30 gausses are in every case within 5 per cent of the true value. Such accu-racy is all that is required by most commercial needs. In fact itis greater than one is justified in seeking in the case of…
Magnetism · measurements and use of instruments/ B8000 Power systems and applications
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