IEC TS 62720:2013
(Main)Identification of units of measurement for computer-based processing
Identification of units of measurement for computer-based processing
IEC/TS 62720:2013 specifies identifiers for units to support computer-based processing of product data. It provides a survey of quantities with associated collections of internationally standardized as well as non-standardized units used in business and science. It concerns any standard or non-standard units of measure currently in use, in two or more distinct ethno-linguistic groups or nations, at least in one domain of industry, for which an explicit method of conversion to a known standard unit of measure or its equivalent is well documented or evident from external references.
Identification des unités de mesure pour le traitement assisté par ordinateur
La CEI/TS 62720:2013 spécifie les identificateurs d'unités pour prendre en charge le traitement informatique de données de produit. Elle fournit un relevé des grandeurs avec les ensembles associés d'unités tant normalisées à l'échelle internationale que non-normalisées utilisées dans le métier. Elle inclut toutes les unités normalisées ou non-normalisées actuellement en usage, dans au moins deux groupes linguistiques ou nationalités différent(e)s, dont la méthode de conversion dans une unité de mesure connue ou son équivalent est bien documentée ou évidente d'après les références externes.
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Standards Content (Sample)
IEC/TS 62720
®
Edition 1.0 2013-05
TECHNICAL
SPECIFICATION
SPÉCIFICATION
TECHNIQUE
Identification of units of measurement for computer-based processing
Identification des unités de mesure pour le traitement assisté par ordinateur
IEC/TS 62720:2013
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IEC/TS 62720
®
Edition 1.0 2013-05
TECHNICAL
SPECIFICATION
SPÉCIFICATION
TECHNIQUE
Identification of units of measurement for computer-based processing
Identification des unités de mesure pour le traitement assisté par ordinateur
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XH
ICS 01.060; 35.240.50 ISBN 978-2-83220-823-6
Warning! Make sure that you obtained this publication from an authorized distributor.
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® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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– 2 – TS 62720 IEC:2013
CONTENTS
FOREWORD . 12
INTRODUCTION . 14
1 Scope . 15
2 Normative references . 15
3 Terms and definitions . 15
4 Relations between quantities, units and their systems . 21
4.1 General . 21
4.2 The International System of Quantities and the International System of Units . 21
4.3 Other systems of quantities and units . 23
4.4 Context of units, quantities, and systems of units . 23
5 SI prefixes and SI prefix symbols. 24
5.1 General . 24
5.2 Formation of multiples and factors to the base of 10 . 24
5.3 Formation of multiples to the base of 2 . 25
5.4 Usage of SI prefixes and SI prefix symbols . 25
5.4.1 General . 25
5.4.2 Combination of SI prefixes, SI prefix symbols, names of units and
symbols for units . 25
5.4.3 Use of power exponentials in conjunction with SI prefixes, SI prefix
symbols, names of units or symbols for units. . 26
5.4.4 Restrictions on combining SI prefixes, SI prefix symbols, names of
units and symbols for units . 26
5.5 Selecting SI prefixes and SI prefix symbols . 26
6 Data sources of units . 26
7 Identification of units . 27
Annex A (informative) Information about units . 28
Annex B (normative) Identifiers for units and quantities that are derived from the SI
system of units . 29
Annex C (normative) Identifiers for units and quantities that are not derived from the
SI system of units . 127
Annex D (normative) Identifiers for unit systems . 163
Annex E (informative) XML representation of units . 164
Bibliography . 260
Figure 1 – Overview about the relationships between the tables contained in the
annexes . 23
Figure 2 – International registration data identifier (IRDI), Source: ISO 11179-6:2005 . 27
Figure B.1 – Structure of table headers. 29
Figure C.1 – Structure of table headers . 127
Table 1 – Concepts for quantities. 16
Table 2 – Base quantity and base unit . 17
Table 3 – Base quantities . 19
Table 4 – Base quantities and base units in the International System of Units . 22
Table 5 – Representation of base quantities in the International System of Units [34] . 22
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TS 62720 IEC:2013 – 3 –
Table 6 – Formation of multiples and factors of units to the base of 10 . 24
Table 7 – Formation of multiples of units to the base of 2 . 25
Table 8 – Units that are used without prefixes or prefix symbols . 26
Table B.1 – Absorbed dose . 29
Table B.2 – Absorbed dose rate . 30
Table B.3 – Acceleration . 30
Table B.4 – Active power . 31
Table B.5 – Amount of substance . 32
Table B.6 – Amount of substance concentration. 32
Table B.7 – Angular acceleration . 33
Table B.8 – Angular cross-section . 33
Table B.9 – Angular momentum . 33
Table B.10 – Angular velocity . 34
Table B.11 – Angular wave number . 34
Table B.12 – Apparent power . 34
Table B.13 – Areic bit density . 35
Table B.14 – Areic charge density . 35
Table B.15 – Areic mass . 36
Table B.16 – Avogadro constant . 36
Table B.17 – Bandwidth distance product . 36
Table B.18 – Battery capacity . 37
Table B.19 – Bit rate . 37
Table B.20 – Burst factor . 37
Table B.21 – Byte rate . 38
Table B.22 – Capacitance . 38
Table B.23 – Catalytic activity . 39
Table B.24 – Catalytic activity concentration . 39
Table B.25 – Celsius temperature . 40
Table B.26 – Compressibility . 40
Table B.27 – Conductivity . 40
Table B.28 – Cross-section . 41
Table B.29 – Dataset of bits . 41
Table B.30 – Dataset of bytes . 42
Table B.31 – Density . 42
Table B.32 – Density of states . 43
Table B.33 – Diffusion constant, thermal diffusivity . 43
Table B.34 – Digit rate . 43
Table B.35 – Dose equivalent . 44
Table B.36 – Dose equivalent rate . 44
Table B.37 – Dynamic viscosity . 45
Table B.38 – Einstein coefficients . 45
Table B.39 – Electric charge . 46
Table B.40 – Electrical conductance . 46
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– 4 – TS 62720 IEC:2013
Table B.41 – Electric current . 47
Table B.42 – Electric current density . 48
Table B.43 – Electric dipole moment . 48
Table B.44 – Electric field strength . 49
Table B.45 – Electric flux density . 49
Table B.46 – Electric polarization . 50
Table B.47 – Electric resistance . 50
Table B.48 – Energy content . 51
Table B.49 – Energy density . 51
Table B.50 – Equilibrium constant based on concentration . 52
Table B.51 – Equilibrium constant based on pressure . 52
Table B.52 – Exposure rate . 52
Table B.53 – Failure rate . 53
Table B.54 – Faraday constant . 53
Table B.55 – First radiation constant. 53
Table B.56 – Force . 54
Table B.57 – Force constant . 54
Table B.58 – Frequency . 55
Table B.59 – Gas leak rate . 55
Table B.60 – Gradient . 55
Table B.61 – Gravitational constant . 56
Table B.62 – Hall coefficient . 56
Table B.63 – I²t-value, Joule integral . 56
Table B.64 – Illumination . 57
Table B.65 – Impulse . 57
Table B.66 – Incidence . 57
Table B.67 – Inductance . 58
Table B.68 – Information content . 58
Table B.69 – Ionic strength . 59
Table B.70 – Irradiance. 59
Table B.71 – Josephson constant . 59
Table B.72 – Kinematic viscosity . 60
Table B.73 – Kinetic energy . 60
Table B.74 – Length . 61
Table B.75 – Linear expansion coefficient . 61
Table B.76 – Lineic bit density . 61
Table B.77 – Lineic electric charge, linear electric charge density . 62
Table B.78 – Lineic electric current, linear electric current density . 62
Table B.79 – Lineic force . 63
Table B.80 – Lineic logarithmic ratio, linear attenuation, linear loss . 64
Table B.81 – Lineic mass . 64
Table B.82 – Lineic power. 65
Table B.83 – Lineic resistance . 66
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TS 62720 IEC:2013 – 5 –
Table B.84 – Lineic torque . 67
Table B.85 – Logarithmic frequency interval . 67
Table B.86 – Logarithmic frequency interval to base 10 . 67
Table B.87 – Logarithmic ratio to base 10 . 68
Table B.88 – Logarithmic ratio to base e . 68
Table B.89 – Lorenz coefficient . 68
Table B.90 – Loudness . 69
Table B.91 – Loudness level . 69
Table B.92 – Luminance . 69
Table B.93 – Luminous efficacy . 70
Table B.94 – Luminous exitance . 70
Table B.95 – Luminous exposure . 70
Table B.96 – Luminous flux . 71
Table B.97 – Luminous intensity . 71
Table B.98 – Magnetic dipole moment . 71
Table B.99 – Magnetic dipole moment of a molecule . 72
Table B.100 – Magnetic field strength, magnetizing field strength . 72
Table B.101 – Magnetic flux . 73
Table B.102 – Magnetic flux density. 73
Table B.103 – Magnetic moment . 73
Table B.104 – Magnetic polarization . 74
Table B.105 – Magnetic vector potential . 74
Table B.106 – Mass . 75
Table B.107 – Mass attenuation coefficient . 75
Table B.108 – Mass density . 76
Table B.109 – Mass flow rate . 77
Table B.110 – Mass flux density . 77
Table B.111 – Mass ratio . 78
Table B.112 – Massic activity, specific activity . 78
Table B.113 – Massic electric current . 79
Table B.114 – Massic heat capacity, specific heat capacity. 79
Table B.115 – Massic power, specific power . 80
Table B.116 – Massic torque. 80
Table B.117 – Mechanical impedance . 80
Table B.118 – Median information flow, expressed as a binary logarithm . 81
Table B.119 – Median information flow, expressed as a common logarithm . 81
Table B.120 – Median information flow, expressed as a natural logarithm . 81
Table B.121 – Mobility . 81
Table B.122 – Molar attenuation coefficient . 82
Table B.123 – Molar conductivity . 82
Table B.124 – Molar flow rate . 82
Table B.125 – Molar heat capacitiy . 83
Table B.126 – Molar internal energy . 83
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– 6 – TS 62720 IEC:2013
Table B.127 – Molar mass . 83
Table B.128 – Molar optical rotatory power . 83
Table B.129 – Molar volume . 84
Table B.130 – Moment of inertia . 84
Table B.131 – Motor constant . 84
Table B.132 – Mass stopping power, atomic stopping power . 85
Table B.133 – Nuclear energy . 85
Table B.134 – Particle current density . 85
Table B.135 – Particle fluence . 85
Table B.136 – Permeability . 86
Table B.137 – Permeance . 86
Table B.138 – Permittivity . 87
Table B.139 – Photon intensity . 87
Table B.140 – Photon luminance . 87
Table B.141 – Planck's constant . 88
Table B.142 – Plane angle . 88
Table B.143 – Polarizability . 88
Table B.144 – Pressure . 89
Table B.145 – Pressure coefficient . 89
Table B.146 – Pressure gradient . 90
Table B.147 – Pressure in relation to volume flow rate .
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