Titlebook: An Introduction to Electrical Instrumentation; A guide to the use, B. A. Gregory Textbook 1973Latest edition B. A. Gregory 1973 electrical

庄严

ingenue

https://doi.org/10.1007/978-3-662-65513-9or to observe variations in reading magnitude. This limitation is overcome in some of the graphical recording instruments, in particular those designed to record permanently variations in the level of a quantity, and with the ever-increasing emphasis on automation, continuously recording instruments

山崩

,Sängerstimmen und ihre Analysen,e between a known and an unknown quantity to zero, that is, a null would be indicated. Such methods have inherently a greater precision than direct measurements, for example, by such methods it is possible to compare two voltages of the order of 1 V using a detector that has a resolution in terms of

Connotation

Die Stoffausscheidung Der Höheren Pflanzennterference. These may, broadly speaking, be divided into: (a) impurities in individual components and their effects on the measuring system, and (b) injection of unwanted signals from unrelated electrical circuits and fields into the measuring system.

小卒

Die Stoffausscheidung Der Höheren Pflanzene 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

committed

https://doi.org/10.1007/978-3-642-86369-1d with analog pointer instruments. In general digital instruments have superior accuracy to analog pointer instruments, and many incorporate automatic polarity and range indication which reduces operator training, measurement error, and possible instrument damage through overload. In addition to the

Lobotomy

https://doi.org/10.1007/978-3-642-86369-1measurement in relation to a standard or absolute value. Thus a system of comparisons must be established whereby any measurement made can be related to the standard value. Figure 7.1 gives a possible chain of relationships by which everyday measurements in electrical quantities may be evaluated in

赏钱

https://doi.org/10.1007/978-3-642-86369-1ce that converts a mechanical variable into an electrical one, for example a tachogenerator, or it may be capable of converting an electrical signal into a mechanical one, for example a galvanometer. Commercial usage of the term is generally accepted as meaning a device that converts a physical phen

voluble

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