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IEC 60584-1 Edition 3.0 2013-08 INTERNATIONAL STANDARD NORME INTERNATIONALE The

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 INTERNATIONALE XB ICS 17.200.20 PRICE CODE CODE PRIX ISBN 978-2-8322-1047-5 ® Registered trademark of the International Electrotechnical Commission Marque déposée de la Commission Electrotechnique Internationale ® Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé. This is a preview - click here to buy the full publication – 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 This is a preview - click here to buy the full publication 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, tmax/ °C ..................................... 64 Table C.2 – Environmental recommendations and limitations of the conductors .................... 66 Table C.3 – Neutron irradiation effects .................................................................................. 67 This is a preview - click here to buy the full publication – 4 – 60584-1 © IEC:2013 INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________ THERMOCOUPLES – Part 1: EMF specifications and tolerances FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60584-1 has been prepared by sub-committee 65B: Measurement and control devices, of IEC technical committee 65: Industrial-process measurement,control and automation. This third edition cancels and replaces the second edition published in 1995. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) IEC 60584-1:1995 and IEC 60584-2:1982 have been merged; b) 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; c) inverse polynomials expressing temperature as functions of EMF are given in Annex B, but inverse tables are not given; This is a preview - click here to buy the full publication 60584-1 © IEC:2013 – 5 – d) the range of the polynomial relating the EMF of Type K thermocouples is restricted to 1 300 °C; e) values of the Seebeck coefficients are given at intervals of 10 °C; f) thermoelectric data (EMF and Seebeck coefficients) are given at the fixed points of the ITS-90; g) some guidance is given in Annex C regarding the upper temperature limits and environmental conditions of use for each thermocouple type. The text of this standard is based on the following documents: FDIS Report on voting 65B/873/FDIS 65B/888/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of the IEC 60584 series, under the general title Thermocouples can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to the specific publication. At this date, the publication will be • reconfirmed, • withdrawn, • replaced by a revised edition, or • amended. This is a preview - click here to buy the full publication – 6 – 60584-1 © IEC:2013 INTRODUCTION This International Standard relates the electromotive force (hereafter abbreviated as EMF) generated by the designated thermocouple types to temperature, based upon the International Temperature Scale of 1990 (ITS-90). The reference polynomials for Types R, S, B, J, T, E, K and N are those used in the uploads/Litterature/iec-60584-1-pdf.pdf