Description / Abstract:
1. Scope
1.1 This SAE Standard provides information on the International System
of Units (abbreviated SI in
all languages), and its application in measurement unit usage.
1.2 The purpose is to provide information on SI and guidance on SI's
correct, uniform usage in
application to land, sea, and aerospace design, engineering, and
manufacturing practices and
technical communications.
1.3 This document and the referenced IEEE/ASTM/ANSI SI 10 Standard,
establish rules for the use of
SI units in SAE technical reports, including Standards, Recommended
Practices, and Information
Reports, as well as technical papers, publications, etc. This TSB 003
document is designated as
applicable for goverance of SI metric practice in all SAE operations,
internal and external
communications, products, and services.
1.4 Throughout this document, SI is intended to include recognized SI
units, as established by the
General Conference on Weights and Measures (CGPM), and a limited
number of other units that,
formally, are not SI units.
SI forms the foundation of international metric standardization. But
it is recognized, worldwide,
that certain exceptions are required. For example: the degree (of
plane angle), the minute, and the
hour, are non-SI units. The decibel is another example.
This document provides guidance and authoritative references for
acceptable use of certain non-SI
units within the SAE' s operations, practices, services, and products.