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Electronic Voltmeters

Author: E.E. Kimberly

The electronic voltmeter is particularly useful in measuring alternating voltages of only a few volts or a fraction of a volt, because it draws no current and so will not disturb the most delicate circuit. It consists of a D'Arsonval-type voltmeter energized through an electron-tube circuit, and has the disadvantage of requiring a source of a-c power for its operation. See Chapter 28.




Last Update: 2011-01-17