IEC TS 62492-2:2013
(Main)Industrial process control devices - Radiation thermometers - Part 2: Determination of the technical data for radiation thermometers
Industrial process control devices - Radiation thermometers - Part 2: Determination of the technical data for radiation thermometers
IEC/TS 62492-2:2013(E) applies to radiation thermometry and addresses all technical data specified in IEC/TS 62492-1. It defines standard test methods which can be used by the end user of radiation thermometers to determine or confirm the fundamental metrological data of radiation thermometers with one wavelength range and one measurement field. It facilitates comparability and testability. Therefore, unambiguous test methods are stipulated for determining technical data, under standardised measuring conditions that can be performed by a sufficiently skilled end user to serve as standard performance criteria for instrument evaluation or selection.
General Information
Standards Content (Sample)
IEC/TS 62492-2 ®
Edition 1.0 2013-04
TECHNICAL
SPECIFICATION
colour
inside
Industrial process control devices – Radiation thermometers –
Part 2: Determination of the technical data for radiation thermometers
IEC/TS 62492-2:2013(E)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
Useful links:
IEC publications search - www.iec.ch/searchpub Electropedia - www.electropedia.org
The advanced search enables you to find IEC publications The world's leading online dictionary of electronic and
by a variety of criteria (reference number, text, technical electrical terms containing more than 30 000 terms and
committee,…). definitions in English and French, with equivalent terms in
It also gives information on projects, replaced and additional languages. Also known as the International
withdrawn publications. Electrotechnical Vocabulary (IEV) on-line.
IEC Just Published - webstore.iec.ch/justpublished Customer Service Centre - webstore.iec.ch/csc
Stay up to date on all new IEC publications. Just Published If you wish to give us your feedback on this publication
details all new publications released. Available on-line and or need further assistance, please contact the
also once a month by email. Customer Service Centre: csc@iec.ch.
IEC/TS 62492-2 ®
Edition 1.0 2013-04
TECHNICAL
SPECIFICATION
colour
inside
Industrial process control devices – Radiation thermometers –
Part 2: Determination of the technical data for radiation thermometers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
U
ICS 17.200.20; 25.040.40 ISBN 978-2-83220-737-6
– 2 – TS 62492-2 © IEC:2013(E)
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviations . 6
3.1 Terms and definitions . 6
3.2 Abbreviations . 9
4 Measurement conditions . 9
5 Determination of technical data . 9
5.1 Measuring temperature range . 9
5.1.1 General . 9
5.1.2 Test method . 10
5.2 Measurement uncertainty . 10
5.2.1 General . 10
5.2.2 Test method . 10
5.3 Noise equivalent temperature difference (NETD) . 11
5.3.1 General . 11
5.3.2 Test method . 11
5.4 Measuring distance . 12
5.5 Field-of-view (target size) . 12
5.5.1 General . 12
5.5.2 Test method . 13
5.6 Distance ratio . 14
5.7 Size-of-source effect (SSE) . 14
5.7.1 General . 14
5.7.2 Test method . 14
5.8 Emissivity setting . 15
5.9 Spectral range . 15
5.10 Influence of the internal instrument or ambient temperature (temperature
parameter) . 15
5.10.1 General . 15
5.10.2 Test method . 16
5.11 Influence of air humidity (humidity parameter) . 17
5.12 Long-term stability . 17
5.12.1 General . 17
5.12.2 Test method . 17
5.13 Short-term stability . 18
5.13.1 General . 18
5.13.2 Test method . 18
5.14 Repeatability . 18
5.14.1 General . 18
5.14.2 Test method . 19
5.15 Interchangeability . 19
5.15.1 General . 19
5.15.2 Test method . 19
5.16 Response time . 20
5.16.1 General . 20
5.16.2 Test method . 21
TS 62492-2 © IEC:2013(E) – 3 –
5.17 Exposure time . 22
5.17.1 General . 22
5.17.2 Test method . 23
5.18 Warm-up time . 24
5.18.1 General . 24
5.18.2 Test method . 24
5.19 Operating temperature and air humidity range . 25
5.19.1 General . 25
5.19.2 Test method . 25
5.20 Storage and transport temperature and air humidity range . 26
5.20.1 General . 26
5.20.2 Test method . 26
6 Safety requirement . 27
Annex A (informative) Change in indicated temperature of a radiation thermometer
corresponding to a change in the radiation exchange . 28
Bibliography . 29
Figure 1 – Relative signal to a signal at a defined aperture size (source size) of
100 mm in diameter for two infrared radiation thermometers A and B versus the source
diameter . 12
Figure 2 – Demonstration of the response time to a rising temperature step . 20
Figure 3 – Possible arrangement for determining the response time with two reference
sources . 22
Figure 4 – Demonstration of the exposure time . 22
Figure 5 – Example of warm-up time . 25
Table A.1 – The change in indicated temperature corresponding to a 1 % change in the
radiation exchange with a radiation thermometer at 23 °C (Example) . 28
– 4 – TS 62492-2 © IEC:2013(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL PROCESS CONTROL DEVICES –
RADIATION THERMOMETERS –
Part 2: Determination of the technical data
for radiation thermometers
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 c
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.