| 释义 |
phasemeter Electr.|ˈfeɪzmiːtə(r)|
[ad. G. phasenmeter, † phasometer (M. von Dolivo-Dobrowolsky 1894, in Elektrotechnische Zeitschr. XV. 351): see phase and meter n.3]
An instrument which measures the phase difference between two oscillations having the same frequency, esp. that between an alternating current and the corresponding voltage (hence giving the power factor).
1894Electrician 21 Sept. 610/1 The phasemeter here described is essentially an ampere meter measuring the idle current. 1903G. D. A. Parr Electr. Engin. Measuring Instruments vii. 194 The phasemeter now under consideration, made by the Electrical Co., Ltd., of London, is an instrument for measuring directly the value of the wattless current in an inductive alternating-current circuit. 1974Physics Bull. Oct. 477/1 The circuitry of the phasemeter has been designed to reduce the effects of errors introduced by crossover distortion and noise in the input signal, which are the most common sources of inaccuracy. |