Electrical measuring instruments and measurements

Publisher Summary

This chapter focuses on electrical measuring instruments and measurements. To detect electrical quantities, such as current, voltage, resistance or power, it is necessary to transform an electrical quantity or condition into a visible indication. This is done with the aid of instruments (or meters) that indicate the magnitude of quantities either by the position of a pointer moving over a graduated scale, known as an analog instrument, or in the form of a decimal number, known as a digital instrument. All analog electrical indicating instruments require three essential devices, namely, a deflecting or operating device, a controlling device, and a damping device. There ...

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