IEC 60584-1:2013

Thermocouples - Part 1: EMF specifications and tolerances

IEC 60584-1:2013 specifies reference functions and tolerances for letter-designated thermocouples (Types R, S, B, J, T, E, K, N, C and A). Temperatures are expressed in degrees Celsius based on the International Temperature Scale of 1990, ITS-90 (symbol t90), and the EMF (symbol E) is in microvolts. The reference functions are polynomials which express the EMF, E in V, as a function of temperature t90 in °C with the thermocouple reference junctions at 0 °C. Values of EMF at intervals of 1 °C are tabulated in Annex A. This third edition cancels and replaces the second edition published in 1995 and constitutes a technical revision. It includes the following changes:
- IEC 60584-1:1995 and IEC 60584-2:1982 have been merged;
- the standard is now explicitly based on the reference polynomials which express thermocouple EMF as functions of temperature. The tables derived from the polynomials are given in Annex A;
- inverse polynomials expressing temperature as functions of EMF are given in Annex B, but inverse tables are not given;
- the range of the polynomial relating the EMF of Type K thermocouples is restricted to 1 300 °C;
- values of the Seebeck coefficients are given at intervals of 10 °C;
- thermoelectric data (EMF and Seebeck coefficients) are given at the fixed points of the ITS-90;
- some guidance is given in Annex C regarding the upper temperature limits and environmental conditions of use for each thermocouple type.

Couples thermoélectriques - Partie 1: Spécifications et tolérances en matière de FEM

La CEI 60584-1:2013 spécifie les fonctions de référence et les tolérances associées aux couples thermoélectriques désignés par une lettre (Types R, S, B, J, T, E, K, N, C et A). Les températures y sont exprimées en degrés Celsius selon l'Échelle Internationale de Température de 1990, EIT-90 (symbole t90) et les FEM (symbole E), en microvolts. Les fonctions de référence sont des polynômes qui expriment la FEM, E en V, en fonction de la température t90 en °C, les jonctions de référence des couples thermoélectriques étant placées à 0 °C. L'Annexe A présente, sous forme de tableau, les valeurs de la FEM tous les 1 °C. Cette troisième édition annule et remplace la deuxième édition parue en 1995. Elle constitue une révision technique. Elle inclut les modifications suivantes:
- les CEI 60584-1:1995 et CEI 60584-2:1982 ont été fusionnées;
- la norme repose désormais de manière explicite sur les polynômes de référence qui expriment la FEM des couples thermoélectriques en fonction de la température. L'Annexe A donne les tables dérivées des polynômes;
- l'Annexe B donne les polynômes inverses, qui expriment la température en fonction de la FEM, mais ne donne pas les tables inverses;
- le domaine de température du polynôme exprimant la FEM des couples thermoélectriques de Type K est limité à 1 300 °C;
- la valeur du coefficient de Seebeck est donnée tous les 10 °C;
- les données thermoélectriques (FEM et coefficients de Seebeck) sont fournies aux points fixes de l'EIT-90;
- l'Annexe C donne des lignes directrices concernant les limites supérieures de température et les conditions d'environnement lors de l'utilisation de chaque Type de couple thermoélectrique.

General Information

• Status: Published
• Publication Date: 27-Aug-2013
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 17.200.20 - Temperature-measuring instruments
• Technical Committee: SC 65B - Measurement and control devices
• Drafting Committee: WG 5 - TC 65/SC 65B/WG 5
• Current Stage: PPUB - Publication issued
• Start Date: 15-Sep-2013
• Completion Date: 28-Aug-2013

Standards Content (Sample)

IEC 60584-1 ®
Edition 3.0 2013-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Thermocouples –
Part 1: EMF specifications and tolerances

Couples thermoélectriques –
Partie 1: Spécifications et tolérances en matière de FEM

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IEC 60584-1 ®
Edition 3.0 2013-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Thermocouples –
Part 1: EMF specifications and tolerances

Couples thermoélectriques –
Partie 1: Spécifications et tolérances en matière de FEM

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XB
ICS 17.200.20 ISBN 978-2-8322-1047-5

– 2 – 60584-1 © IEC:2013
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Terms and definitions . 7
3 Thermocouple designations . 8
4 EMF – Temperature reference functions . 9
5 Thermocouple tolerances . 14
6 Thermoelectric values at the fixed points of the ITS-90 . 15
Annex A (informative) Tables for EMF as a function of temperature . 17
Annex B (informative) Inverse polynomial functions . 57
Annex C (informative) Guidance on the selection of thermocouples . 64
Bibliography . 68

Table 1 – Thermocouple types . 9
Table 2 – Type R reference function . 10
Table 3 – Type S reference function . 11
Table 4 – Type B reference function . 11
Table 5 – Type J reference function . 11
Table 6 – Type T reference function . 12
Table 7 – Type E reference function . 12
Table 8 – Type K reference function . 13
Table 9 – Type N reference function . 13
Table 10 – Type C reference function . 14
Table 11 – Type A reference function . 14
Table 12 – Thermocouple tolerances . 15
Table 13 – EMF and Seebeck coefficients of the thermocouples at the fixed points of
the ITS-90 (EMF: upper row, Seebeck coefficient: lower row) . 16
Table A.1 – Type R: Platinum - 13 % rhodium / platinum (1 of 5) . 17
Table A.2 – Type S: Platinum-10 % rhodium / platinum (1 of 5) . 21
Table A.3 – Type B: Platinum-30 % rhodium / platinum-6 % rhodium (1 of 4) . 26
Table A.4 – Type J: Iron / copper-nickel (1 of 4) . 30
Table A.5 – Type T: Copper / copper-nickel (1 of 2) . 34
Table A.6 – Type E: Nickel-chromium / copper-nickel (1 of 3) . 36
Table A.7 – Type K: Nickel-chromium / nickel-aluminium (1 of 4) . 39
Table A.8 – Type N: Nickel-chromium-silicon / nickel-silicon (1 of 4) . 43
Table A.9 – Type C: Tungsten-5 % rhenium / tungsten-26 % rhenium (1 of 5) . 47
Table A.10 – Type A: Tungsten-5 % rhenium / tungsten-20 % rhenium (1 of 5) . 52
Table B.1 – Type R Inverse function coefficients . 58
Table B.2 – Type S Inverse function coefficients . 59
Table B.3 – Type B Inverse function coefficients . 59
Table B.4 – Type J Inverse function coefficients . 60
Table B.5 – Type T Inverse function coefficients . 60

60584-1 © IEC:2013 – 3 –
Table B.6 – Type E Inverse function coefficients . 61
Table B.7 – Type K Inverse function coefficients . 61
Table B.8 – Type N Inverse function coefficients . 62
Table B.9 – Type C Inverse function coefficients . 62
Table B.10 – Type A Inverse function coefficients . 63
Table C.1 – Recommended maximum temperature of use, t / °C . 64
max
Table C.2 – Environmental recommendations and limitations of the conductors . 66
Table C.3 – Neutron irradiation effects . 67

– 4 – 60584-1 © IEC:2013
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
THERMOCOUPLES –
Part 1: EMF specifications and tolerances

FOREWORD
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