Circular Scale - Circular Scale It can be considered as the...

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Circular Scale It can be considered as the classic method of presenting information in a quantitative way. The base and scale, or circle graduation, is the line, which may be real or perceived, which runs from end to end of the scale and that the marks on the scale and line are determined toured the needle . The scale marks are the marks that constitute the instrument scale. In quantitative presentation is of utmost importance that he number of graduations are carefully chosen in order to get shaved and accurate readings interpretations. Otherwise read errors may occur. The reading speed decreases when increasing the rankings. Manufacturers sensilla follow a rule that consists in dividing the scales so that the graduations representing units of 1, 2 or 5, or decimal multilos of these. The separation also has great importance, there can be no complete uniformity esntre all presentations cuantitativas.Existen two different linear and nonlinear groups, in other words, scales uniform and nonuniform spaced graduations. The distance between the centers of the graduations indicating the minimum and maximum values of the selected measurement range is called scale length. Ideally, and basing on purely theoretical considerations conditions, it has been calculated that a projected logitud to observe at a distance of 75cm scale. Presentations Powerful scales. To measure some quantities, very long scales nesecitan, since measurement ranges are high. This makes it difficult to present such amounts in simple circular scales in boxes of standard size. The presenetacion shown in a) is perhaps the easiest way to adapt a scale longitudinally; dividing it into two concentric scales and making the inside is the continuation of the outside. In b) a method that is used in certain types of anemometers is represented; in its basic concept is similar to that just describir.En this design, however, a single needle rotates in a circular scale and drag a second scale instead of a needle. This rotary scale, which records hundreds of miles per hour when the needle rotates complete revaluciones, is seen in a avertura on the main dial.
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