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首页> 外文期刊>Proceedings of the IEE - Part B: Radio and Electronic Engineering >An electronic supply for use in the calibration of instruments
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An electronic supply for use in the calibration of instruments

机译：用于仪器校准的电子电源

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A brief review is given of some of the features of supplies that are suitable for use in the calibration of a.c. instruments, and an account is then given of a high-power oscillator-amplifier set that has been built for this purpose. The set consists of an oscillator, two amplifiers and a phase-shift unit. An output of at least 700VA is available at unity power factor within the range 30c/s-5kc/s from each amplifier, and if necessary the two outputs can be connected in series. The output voltage is free from random variations greater than 0.01%, drifts at maximum power output by not more than 0.003% per minute, and has a supply-frequency component not greater than 0.01%. The output voltage is therefore always constant to 0.01% for the time taken to calibrate a point on an instrument scale. The distortion in the outputs of the oscillator-amplifier set is never greater than 0.45% of the fundamental at any frequency or power output within its rating.
机译：简要回顾了适用于交流校准的电源的某些功能。仪器，然后说明为此目的而构建的高功率振荡器-放大器套件。该装置由一个振荡器，两个放大器和一个相移单元组成。每个放大器的输出功率为30c / s-5kc / s，单位功率因数至少为700VA，如有必要，两个输出可以串联。输出电压无大于0.01％的随机变化，在最大功率输出时每分钟漂移不超过0.003％，电源频率分量不超过0.01％。因此，在校准仪器刻度上的时间时，输出电压始终恒定为0.01％。在其额定范围内的任何频率或功率输出下，振荡器放大器组输出的失真都不会大于基波的0.45％。

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