Abstract
In many instances the values of electrical quantities (voltage, current and power) are too large or too small to be connected directly to the available instrument. It therefore becomes necessary to suitably reduce, or amplify, the magnitude of the measurand so that it has a value compatible with the measuring instrument to be used. In addition to these requirements, the effects of the instrument’s impedance must always be considered for this may affect the value indicated for the measurand, (see p. 27). The disturbance resulting from the insertion of a measuring instrument should be minimal, that is to say the device used in measuring a current should have as low an impedance as possible, while for voltage measurement the requirement is a high impedance. In both cases the ideal instrument’s performance will be independent of frequency.
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© 1981 B.A. Gregory
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Gregory, B.A. (1981). Signal Conditioning. In: An Introduction to Electrical Instrumentation and Measurement Systems. Palgrave, London. https://doi.org/10.1007/978-1-349-16482-0_6
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DOI: https://doi.org/10.1007/978-1-349-16482-0_6
Publisher Name: Palgrave, London
Print ISBN: 978-0-333-29384-3
Online ISBN: 978-1-349-16482-0
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