IEEE/ASTM SI 10-2002
國際單位制(SI)使用的ANSI標準:現代米制

Use of the International System of Units (SI): The Modern Metric System

被代替

標準號

IEEE/ASTM SI 10-2002

發布

2002年

發布單位

美國電氣電子工程師學會

替代標準

IEEE/ASTM SI 10/COR-2005

當前最新

IEEE/ASTM SI 10/COR-2017

 

 

適用范圍

The International System of Units is the form of the metric system that is generally in use around the world. This document gives guidance for the use of this system. It is the primary American National Standard for conformity to the International System of Units (or the SI, as it is abbreviated from its name in French, Le Système International d’Unités ). Any measurable quantity can be represented in this system with the aid of just seven “base” units, used directly for the quantities length, mass, time, electric current, temperature, amount of substance, and luminous intensity, or by combinations (called “derived” units) of these seven. For example, the unit of speed can be expressed by the unit of length divided by the unit of time. The SI is a complete and coherent system. This standard shows first the two classes of units (base and derived) that make up the SI, together with the symbols by which they are known. Prefixes that allow the formation of decimal multiples and submultiples are explained. Then come notes on the proper use of the SI units and symbols in many applications. In the first Annex are lists of many units from non-SI systems with the appropriate SI units that should be substituted and numerical conversion factors. Other annexes include rules for conversion and rounding, a discussion of the advantages of SI units with definitions where appropriate, a history of the development of the system, and a bibliography of source documents.

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