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Preferred numbers represent preferences of simple numbers (such as 1, 2, and 5) multiplied by the powers of a convenient basis, usually 10. [1] Comparison of preferred numbers of the 1-2-5, Renard and f-stop series on a logarithmic scale divided into 40 equal intervals (blue)
preferred numbers: Image title: Comparison of preferred numbers of the 1-2-5, Renard and f-stop series on a logarithmic scale divided into 40 equal intervals (blue) by CMG Lee. Width: 100%: Height: 100%
An NBS technical note describes that system of convenient metric values as the 1-2-5 series in reverse, with assigned preferences for those numbers which are multiples of 5, 2, and 1 (plus their powers of 10). Linear dimensions above 100 mm were excluded (because such measurements are defined by another set of rules).
The E series of preferred numbers was chosen such that when a component is manufactured it will end up in a range of roughly equally spaced values (geometric progression) on a logarithmic scale.
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Renard series are a system of preferred numbers dividing an interval from 1 to 10 into 5, 10, 20, or 40 steps. [1] This set of preferred numbers was proposed ca. 1877 by French army engineer Colonel Charles Renard [ 2 ] [ 3 ] [ 4 ] and reportedly published in an 1886 instruction for captive balloon troops, thus receiving the current name in ...
500 ml (1 ⁄ 2 L) 750 ml (3 ⁄ 4 L) 1 L; 1.5 L; 2 L; 3 L; 5 L; In the United States, the alcohol industry switched to metric bottle sizes on October 1, 1976, abandoning the existing 38 sizes of bottles and instead adopting the following 6 sizes: [2] 50 mL (miniature) 200 mL (replaced the half-pint) (≈237 mL is a U.S. half-pint)
Download as PDF; Printable version; In other projects Wikidata item ... E3 series may refer to: E3 series (preferred numbers), a series of standardized resistor and ...