AC MEASURING INSTRUMENTS


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AC MEASURING INSTRUMENTS
AC MEASURING INSTRUMENTSSince the basic electrical meter is designed to measure direct current, the measurement of alternating current (ac) requires some meter design modifications. Specifically the alternating current being measured must somehow be converted to direct current for measurement. In most cases the conversion of the ac to dc (known as rectification) creates a slight loss of electrical signal. To ensure proper accuracy, any meter measuring alternating current must compensate for the energy lost during rectification; this is true for both moving-coil and digital ac meters. The most common means to measure alternating current using a moving-coil meter is to simply rectify the alternating current prior to sending the electrical signal to the meter movement; these are often called
Citation
Thomas K. Eismin: Aircraft Electricity and Electronics, Sixth Edition. AC MEASURING INSTRUMENTS, Chapter (McGraw-Hill Professional, 2014), AccessEngineering Export