Contents list[edit] The standard is divided into the following chapters: Foreword Introduction Scope Normative references Terms and definitions Quantities Dimensions Units Printing rules Annex A (normative) – Terms in names for physical quantities Annex B (normative) – Rounding of numbers Annex C (normative) – Logarithmic quantities and their units Annex D (informative) – International organizations in the field of quantities and units

Scope[edit] ISO 80000-1 gives "general information and definitions concerning quantities, systems of quantities, units, quantity and unit symbols, and coherent unit systems, especially the International System of Quantities, ISQ, and the International System of Units, SI."

Terms and definitions[edit] The standard includes the following definitions. quantity: property of a phenomenon, body, or substance, where the property has a magnitude that can be expressed by means of a number and a reference kind of quantity: aspect common to mutually comparable quantities system of quantities: set of quantities together with a set of non-contradictory equations relating those quantities base quantity: quantity in a conventionally chosen subset of a given system of quantities, where no quantity in the subset can be expressed in terms of the other quantities within that subset derived quantity: quantity, in a system of quantities, defined in terms of the base quantities of that system International System of Quantities: system of quantities based on the seven base quantities: length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity quantity dimension: expression of the dependence of a quantity on the base quantities of a system of quantities as a product of powers of factors corresponding to the base quantities, omitting any numerical factor quantity of dimension one: quantity for which all the exponents of the factors corresponding to the base quantities in its quantity dimension are zero unit of measurement: real scalar quantity, defined and adopted by convention, with which any other quantity of the same kind can be compared to express the ratio of the second quantity to the first one as a number base unit: measurement unit that is adopted by convention for a base quantity derived unit: measurement unit for a derived quantity coherent derived unit: derived unit that, for a given system of quantities and for a chosen set of base units, is a product of powers of base units with no other proportionality factor than one system of units: set of base units and derived units, together with their multiples and submultiples, defined in accordance with given rules, for a given system of quantities coherent system of units: system of units, based on a given system of quantities, in which the measurement unit for each derived quantity is a coherent derived unit off-system measurement unit: measurement unit that does not belong to a given system of units International System of Units: system of units, based on the International System of Quantities, their names and symbols, including a series of prefixes and their names and symbols, together with rules for their use, adopted by the General Conference on Weights and Measures (CGPM) multiple of a unit: measurement unit obtained by multiplying a given measurement unit by an integer greater than one sub-multiple of a unit: measurement unit obtained by dividing a given measurement unit by an integer greater than one quantity value: number and reference together expressing magnitude of a quantity numerical quantity value: number in the expression of a quantity value, other than any number serving as the reference quantity calculus: set of mathematical rules and operations applied to quantities other than ordinal quantities quantity equation: mathematical relation between quantities in a given system of quantities, independent of measurement units unit equation: mathematical relation between base units, coherent derived units or other measurement units conversion factor between units: ratio of two measurement units for quantities of the same kind numerical value equation: mathematical relation between numerical quantity values, based on a given quantity equation and specified measurement units ordinal quantity: quantity, defined by a conventional measurement procedure, for which a total ordering relation can be established, according to magnitude, with other quantities of the same kind, but for which no algebraic operations among those quantities exist quantity-value scale: ordered set of quantity values of quantities of a given kind of quantity used in ranking, according to magnitude, quantities of that kind ordinal quantity-value scale: quantity-value scale for ordinal quantities conventional reference scale: quantity-value scale defined by formal agreement nominal property: property of a phenomenon, body, or substance, where the property has no magnitude

Quantities[edit] International System of Quantities (ISQ)[edit] The special choice of base quantities and quantity equations, including multipliers, given in ISO 80000 and IEC 80000 defines the International System of Quantities, denoted “ISQ” in all languages. Derived quantities can be defined in terms of the base units by quantity equations. There are seven base quantities in the ISQ: length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity.

Dimensions[edit] This section is empty. You can help by adding to it. (January 2014)

Units[edit] Section 6.5 of the standard describes the International System of Units including SI prefixes and IEC binary prefixes kibi- to yobi-.

Printing rules[edit] Section 7.3.2 states that the decimal mark is either a comma or a point on the line and further states that whichever decimal mark is used, that same mark should be consistently used.[2] This is in agreement with prior ISO standards and revisions, notably resolution 10 of the 22nd CGPM, 2003.[3]

Annex A (normative) – Terms in names for physical quantities[edit] Main article: Level (logarithmic quantity) According to Annex A, "[t]he logarithm of the ratio of a quantity, Q, and a reference value of that quantity, Q0, is called a level". For example LP = ln(P/P0) is the level of a power quantity P.

Annex B (normative) – Rounding of numbers[edit] This section is empty. You can help by adding to it. (January 2014)

Annex C (normative) – Logarithmic quantities and their units[edit] Main article: Field, power, and root-power quantities Annex C introduces the concepts of power quantities and root-power quantities, and deprecates field quantity.

Annex D (informative) – International organizations in the field of quantities and units[edit] This section is empty. You can help by adding to it. (January 2014)

References[edit] ^ "ISO 80000-1:2009". International Organization for Standardization. Retrieved 20 July 2013. ^ http://www.iso.org/iso/catalogue_detail?csnumber=30669 ^ http://www.bipm.org/en/CGPM/db/22/10 v t e ISO standards by standard number List of ISO standards / ISO romanizations / IEC standards 1–9999 1 2 3 4 5 6 7 9 16 31 -0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 128 216 217 226 228 233 259 269 302 306 428 518 519 639 -1 -2 -3 -5 -6 646 690 732 764 843 898 965 1000 1004 1007 1073-1 1413 1538 1745 1989 2014 2015 2022 2047 2108 2145 2146 2240 2281 2709 2711 2788 2848 2852 3029 3103 3166 -1 -2 -3 3297 3307 3602 3864 3901 3977 4031 4157 4217 4909 5218 5428 5775 5776 5800 5964 6166 6344 6346 6385 6425 6429 6438 6523 6709 7001 7002 7098 7185 7200 7498 7736 7810 7811 7812 7813 7816 8000 8178 8217 8571 8583 8601 8632 8652 8691 8807 8820-5 8859 -1 -2 -3 -4 -5 -6 -7 -8 -8-I -9 -10 -11 -12 -13 -14 -15 -16 8879 9000/9001 9075 9126 9293 9241 9362 9407 9506 9529 9564 9594 9660 9897 9899 9945 9984 9985 9995 10000–19999 10005 10006 10007 10116 10118-3 10160 10161 10165 10179 10206 10218 10303 -11 -21 -22 -28 -238 10383 10487 10585 10589 10646 10664 10746 10861 10957 10962 10967 11073 11170 11179 11404 11544 11783 11784 11785 11801 11898 11940 (-2) 11941 11941 (TR) 11992 12006 12182 12207 12234-2 13211 -1 -2 13216 13250 13399 13406-2 13450 13485 13490 13567 13568 13584 13616 14000 14031 14224 14289 14396 14443 14496 -2 -3 -6 -10 -11 -12 -14 -17 -20 14644 14649 14651 14698 14750 14764 14882 14971 15022 15189 15288 15291 15292 15398 15408 15444 -3 15445 15438 15504 15511 15686 15693 15706 -2 15707 15897 15919 15924 15926 15926 WIP 15930 16023 16262 16612-2 16750 16949 (TS) 17024 17025 17100 17203 17369 17442 17799 18000 18004 18014 18245 18629 18916 19005 19011 19092 (-1 -2) 19114 19115 19125 19136 19439 19500 19501 19502 19503 19505 19506 19507 19508 19509 19510 19600:2014 19752 19757 19770 19775-1 19794-5 19831 20000+ 20000 20022 20121 20400 21000 21047 21500 21827:2002 22000 23270 23271 23360 24517 24613 24617 24707 25178 25964 26000 26300 26324 27000 series 27000 27001 27002 27006 27729 28000 29110 29148 29199-2 29500 30170 31000 32000 38500 40500 42010 55000 80000 -1 -2 -3 Category Retrieved from "https://en.wikipedia.org/w/index.php?title=ISO_80000-1&oldid=747922918" Categories: ISO/IEC 80000Hidden categories: Articles to be expanded from January 2014All articles to be expandedArticles with empty sections from January 2014All articles with empty sectionsArticles using small message boxes

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