Abstract
The methods described in this chapter could, as an alternative, have been termed ‘null methods’-the purpose of the measurement process being to reduce the difference between a known and an unknown quantity to zero, that is so a null can be indicated. Inherently, such methods have a greater precision than direct measurements; for example, by using a detector that has a resolution of a microvolt it is possible to compare in terms of microvolts two voltages that have magnitudes of the order of, say, 1 V. The accuracy of such methods must, however, depend on the limits of error that apply to the ‘known’ or ‘standard’ quantity used.
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© 1981 B.A. Gregory
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Gregory, B.A. (1981). Comparison Methods. In: An Introduction to Electrical Instrumentation and Measurement Systems. Palgrave, London. https://doi.org/10.1007/978-1-349-16482-0_3
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DOI: https://doi.org/10.1007/978-1-349-16482-0_3
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