EN 62460:2008
(Main)Temperature - Electromotive force (EMF) tables for pure-element thermocouple combinations
Temperature - Electromotive force (EMF) tables for pure-element thermocouple combinations
IEC 62460:2008 specifies the equations and reference tables relating temperature to EMF (electro-motive force) for Gold versus Platinum and Platinum versus Palladium thermocouples. For information and convenience of use it also provides the approximate equations for temperature as functions of EMF.
Temperatur – Tabellen der elektromotorischen Kraft (EMK) für Kombinationen von Reinelement-Thermoelementen
Tableaux température - Force électromotrice (F.É.M.) pour les combinaisons de couples thermoélectriques à éléments purs
La CEI 62460:2008 spécifie les équations et les tableaux de référence donnant la relation entre la température et la f.é.m. (force électromotrice) pour les couples thermoélectriques Or/Platine et Platine/Palladium. Pour information et facilité d'usage, les équations approchées donnant la température en fonction de la f.é.m. sont aussi données.
Tabela temperatura-potencial za termospojne kombinacije čistih elementov (IEC 62460:2008)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2009
7DEHODWHPSHUDWXUDSRWHQFLDO]DWHUPRVSRMQHNRPELQDFLMHþLVWLKHOHPHQWRY ,(&
Temperature - Electromotive force (EMF) tables for pure-element thermocouple
combinations
Temperatur – Tabellen der elektromotorischen Kraft (EMK) für Kombinationen von
Reinelement-Thermoelementen
Tableaux température - Force électromotrice (F.É.M.) pour les combinaisons de couples
thermoélectriques à éléments purs
Ta slovenski standard je istoveten z: EN 62460:2008
ICS:
17.200.20 Instrumenti za merjenje Temperature-measuring
temperature instruments
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 62460
NORME EUROPÉENNE
September 2008
EUROPÄISCHE NORM
ICS 17.200.20; 25.040.40
English version
Temperature -
Electromotive force (EMF) tables
for pure-element thermocouple combinations
(IEC 62460:2008)
Tableaux température - Temperatur -
Force électromotrice (F.É.M.) Tabellen der elektromotorischen Kraft
pour les combinaisons de couples (EMK) für Kombinationen
thermoélectriques à éléments purs von Reinelement-Thermoelementen
(CEI 62460:2008) (IEC 62460:2008)
This European Standard was approved by CENELEC on 2008-08-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62460:2008 E
Foreword
The text of document 65B/665/FDIS, future edition 1 of IEC 62460, prepared by SC 65B, Devices &
process analysis, of IEC TC 65, Industrial-process measurement, control and automation, was submitted
to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 62460 on 2008-08-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2009-05-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-08-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 62460:2008 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 62460:2008
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
1) 2)
IEC 60584-1 - Thermocouples - EN 60584-1 1995
Part 1: Reference tables
1)
Undated reference.
2)
Valid edition at date of issue.
IEC 62460
Edition 1.0 2008-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Temperature – Electromotive force (EMF) tables for pure-element thermocouple
combinations
Tableaux température – Force électromotrice (F.É.M.) pour les combinaisons de
couples thermoélectriques à éléments purs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
U
CODE PRIX
ICS 17.200.20; 25.040.40 ISBN 2-8318-9852-8
– 2 – 62460 © IEC:2008
CONTENTS
FOREWORD.3
1 Scope.5
2 Normative references .5
3 Terms and definitions .5
4 Information on tables and equations .6
5 Tables for Gold versus Platinum thermocouples .7
5.1 Gold versus Platinum: EMF at intervals of 1 °C .7
5.2 Gold versus Platinum: Temperature at intervals of 10 μV .10
5.3 Thermoelectric values at the defining fixed points of the ITS-90 for Au/Pt
thermocouples (informative) .14
6 Tables for Platinum versus Palladium thermocouples .15
6.1 Platinum versus Palladium: EMF at intervals of 1 °C .15
6.2 Platinum versus Palladium: Temperature at intervals of 10 μV .19
6.3 Thermoelectric values at the defining fixed points of the ITS-90 for Pt/Pd
thermocouples (informative) .25
Annex A Gold versus Platinum coefficients .26
Annex B Platinum versus Palladium Coefficients .28
62460 © IEC:2008 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TEMPERATURE – ELECTROMOTIVE FORCE (EMF) TABLES FOR
PURE-ELEMENT THERMOCOUPLE COMBINATIONS
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 62460 has been prepared by subcommittee 65B: Devices and
process analysis, of IEC technical committee 65: Industrial-process measurement, control and
automation.
The text of this standard is based on the following documents:
FDIS Report on voting
65B/665/FDIS 65B/684/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.
– 4 – 62460 © IEC:2008
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result 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.
62460 © IEC:2008 – 5 –
TEMPERATURE – ELECTROMOTIVE FORCE (EMF) TABLES FOR
PURE-ELEMENT THERMOCOUPLE COMBINATIONS
1 Scope
This International Standard specifies the equations and reference tables relating temperature
to EMF (electro-motive force) for Gold versus Platinum and Platinum versus Palladium
thermocouples. For information and convenience of use it also provides the approximate
equations for temperature as functions of EMF.
The tables and equations in this standard are intended for use with thermocouples made from
elements of purity not less than 99.999 % for Platinum and Gold and of 99.99 % for
Palladium, by weight.
Tolerances on initial values of EMF versus temperature have not been established for the
thermocouples in this standard. Where required, these tolerances should be agreed between
the wire manufacturer and the user.
Temperatures in this standard are based on the International Temperature Scale of 1990
(ITS-90). They are expressed in degrees Celsius, symbol t . Values of EMF, symbol E/μV,
are given in microvolts.
This standard does not cover extension or compensating wires for use with the pure-element
thermocouples. The questions of their use shall be agreed between the manufacturer and the
user.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60584-1, Thermocouples – Reference tables
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60584-1 apply, as
well as the following.
3.1
thermocouple types
the following thermocouple wire types are covered by this standard:
• Gold versus Platinum (Au/Pt or Gold/Platinum)
• Platinum versus Palladium (Pt/Pd or Platinum/Palladium)
Following international convention, as in IEC 60584-1, when identifying thermocouples the
positive element/wire is given first.
– 6 – 62460 © IEC:2008
3.2 thermoelectric values at the ITS-90 fixed points
values are given for the defining triple points (TP), melting points (MP) and freezing points
(FP) in the temperature range of the corresponding tables. The Seebeck coefficient S is the
first derivative of the EMF with respect to temperature.
4 Information on tables and equations
The following tables are included in this standard:
• Gold versus Platinum: EMF at intervals of 1 °C
• Gold versus Platinum: temperatures at intervals of 10μV
• Gold versus Platinum: thermoelectric values at the fixed points of the ITS-90
• Platinum versus Palladium: EMF at intervals of 1 °C
• Platinum versus Palladium: temperatures at intervals of 10μV
• Platinum versus Palladium: thermoelectric values at the fixed points of the ITS-90
For the tables in this document, t
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.