Vfrdtyky

ISO 31 (Quantities and units, International Organization for Standardization, 1992) is a deprecated international standard for the use of physical quantities and units of measurement, and formulas involving them, in scientific and educational documents.^{[citation needed]} It is superseded by ISO/IEC 80000.

Parts

The standard comes in 14 parts:

• 
  ISO 31-0: General principles


• 
  ISO 31-1: Space and time (replaced by ISO/IEC 80000-3:2007)


• 
  ISO 31-2: Periodic and related phenomena (replaced by ISO/IEC 80000-3:2007)


• 
  ISO 31-3: Mechanics (replaced by ISO/IEC 80000-4:2006)


• 
  ISO 31-4: Heat (replaced by ISO/IEC 80000-5)


• 
  ISO 31-5: Electricity and magnetism (replaced by ISO/IEC 80000-6)


• 
  ISO 31-6: Light and related electromagnetic radiations (replaced by ISO/IEC 80000-7)


• 
  ISO 31-7: Acoustics (replaced by ISO/IEC 80000-8:2007)


• 
  ISO 31-8: Physical chemistry and molecular physics (replaced by ISO/IEC 80000-9)


• 
  ISO 31-9: Atomic and nuclear physics (replaced by ISO/IEC 80000-10)


• 
  ISO 31-10: Nuclear reactions and ionizing radiations
  


• 
  ISO 31-11: Mathematical signs and symbols for use in the physical sciences and technology (replaced by ISO 80000-2:2009)


• 
  ISO 31-12: Characteristic numbers (replaced by ISO/IEC 80000-11)


• 
  ISO 31-13: Solid state physics (replaced by ISO/IEC 80000-12)

A second international standard on quantities and units was IEC 60027^{[citation needed]}. The ISO 31 and IEC 60027 Standards were revised by the two standardization organizations in collaboration ([1], [2]) to integrate both standards into a joint standard ISO/IEC 80000 - Quantities and Units in which the quantities and equations used with SI are to be referred as the International System of Quantities (ISQ). ISO/IEC 80000 supersedes both ISO 31 and part of IEC 60027.

Coined words

ISO 31-0 introduced several new words into the English language that are direct spelling-calques from the French.^[1] The intention was that these words be used in scientific papers for the sake of convenience and clarity.

Related national standards

• 
  Canada: CAN/CSA-Z234-1-89 Canadian Metric Practice Guide (covers some aspects of ISO 31-0, but is not a comprehensive list of physical quantities comparable to ISO 31)


• 
  United States: There are several national SI guidance documents, such as NIST SP 811, NIST SP 330, NIST SP 814, IEEE/ASTM SI 10, SAE J916. These cover many aspects of the ISO 31-0 standard, but lack the comprehensive list of quantities and units defined in the remaining parts of ISO 31.

See also

• 
  SI – the international system of units


• 
  BIPM – publishes freely available information on SI units [3], which overlaps with some of the material covered in ISO 31-0
  


• 
  IUPAP – much of the material in ISO 31 comes originally from Document IUPAP-25 of the Commission for Symbols, Units and Nomenclature (SUN Commission) [4] of the International Union of Pure and Applied Physics
  


• 
  IUPAC – some of the material in ISO 31 originates from the Interdivisional Committee on Terminology, Nomenclature and Symbols [5] of the International Union of Pure and Applied Chemistry
  


• 
  Quantities, Units and Symbols in Physical Chemistry – this IUPAC "Green Book" covers many ISO 31 definitions


• 
  IEC 60027 Letter symbols to be used in electrical technology


• 
  ISO 1000 SI Units and Recommendations for the use of their multiples and of certain other units (bundled with ISO 31 as the ISO Standards Handbook – Quantities and units)

Notes

References

• 
  International Organization for Standardization (1993). ISO Standards Handbook: Quantities and units (3rd edition). Geneva: ISO. ISBN 92-67-10185-4..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em} (contains both ISO 31 and ISO 1000)


• 
  Cohen, E. R.; Giacomo, P. (1987). "Symbols, Units, Nomenclature and Fundamental Constants in Physics (1987 Revision), Document IUPAP-25 (IUPAP–SUNAMCO 87–1)". Physica A. 146: 1&ndash, 68. Bibcode:1987PhyA..146D...9C. doi:10.1016/0378-4371(87)90215-9.
  

External links

• 
  ISO TC12 standards – Quantities, units, symbols, conversion factors