1、 IEC TR 62617 Edition 2.0 2015-11 TECHNICAL REPORT Home laundry appliances Uncertainty reporting of measurements IEC TR 62617:2015-11(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2015 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may b
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10、ur feedback on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC TR 62617 Edition 2.0 2015-11 TECHNICAL REPORT Home laundry appliances Uncertainty reporting of measurements INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 97.060 ISBN 978-2-8322-3033
11、-6 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. 2 IEC TR 62617:2015 IEC 2015 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope 6 2 Normative references 6 3 Terms and definitions 6 4 The approa
12、ch to uncertainty measurement 7 4.1 The importance of the uncertainty . 7 4.2 Ways to access uncertainty . 7 5 Expanded uncertainty calculation 8 6 Absolute and relative reproducibility standard deviation . 8 7 Reporting uncertainty 9 8 Expanded uncertainty values . 10 8.1 General . 10 8.2 Expanded
13、uncertainty of measurement in IEC 60456:2003 (4 thedition) . 10 8.3 Expanded uncertainty of measurement in IEC 60456:2010 (5 thedition) 10 8.4 Expanded uncertainty of measurement in IEC 61121:2002 (3 rdedition) . 11 8.5 Expanded uncertainty of measurement in IEC 62512:2012 (1 stedition) 11 Bibliogra
14、phy 14 Table 1 Expanded uncertainty of measured values of IEC 60456:2003 (4 thedition) for horizontal drum washing machine 10 Table 2 Expanded uncertainty of measured values of IEC 60456:2010 (5 thedition) for horizontal axis washing machines 11 Table 3 Expanded uncertainty of measured values of IEC
15、 61121:2002 (3 rdedition) for condenser tumble dryers . 11 Table 4 Expanded uncertainty of measured values of IEC 62512:2012 (1 stedition) for horizontal-axis washer-dryer 12 Table 5 Expanded uncertainty of measured values of IEC 62512:2012 (1 stedition) for vertical-axis washer-dryer without heater
16、 . 13 IEC TR 62617:2015 IEC 2015 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ HOME LAUNDRY APPLIANCES UNCERTAINTY REPORTING OF MEASUREMENTS FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical commit
17、tees (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
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24、 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
25、 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 publicati
26、on. 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 p
27、atent rights. The main task of IEC technical committees is to prepare International Standards. However, a technical committee may propose the publication of a technical report when it has collected data of a different kind from that which is normally published as an International Standard, for examp
28、le “state of the art“. IEC 62617, which is a Technical Report, has been prepared by subcommittee 59D: Performance of household and similar electrical laundry appliances, of IEC technical committee 59: Performance of household and similar electrical appliances. This second edition cancels and replace
29、s the first edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: alternative expression of expanded uncertainties in absolute values; expanded uncertainty for horizontal drum
30、washing machines according to IEC 60456:2010; 4 IEC TR 62617:2015 IEC 2015 expanded uncertainties for washer-dryer according to IEC 62512:2012 clarifications of the examples of expanded uncertainty calculation. The text of this technical report is based on the following documents: Enquiry draft Repo
31、rt on voting 59D/430/DTR 59D/432/RVC Full information on the voting for the approval of this technical report 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. Words in bold in the text are specific
32、ally defined in Clause 3. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, with
33、drawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. IEC TR 62617:2015 IEC 2015 5 INTRODUCTION To encourage the efficient use of energy and other resources, National governments and regional authorities have issued regulations, whic
34、h mandate the provision of information to consumers regarding the energy and water consumption of household appliances and associated performance characteristics. This information is usually conveyed by labels attached to appliances at the point of sale and also by brochures provided by manufacturer
35、s. Methods for measuring declared values for energy and water consumption and performance characteristics should be of sufficient accuracy to provide confidence to governments, consumers and manufacturers. The accuracy of a test method is expressed in terms of bias and precision. Precision, when eva
36、luating test methods, is expressed in terms of two measurement concepts: repeatability and reproducibility. Therefore, standard procedures should be used for determining the repeatability and the reproducibility of test methods developed by technical committee 59 and its subcommittees. The repeatabi
37、lity of a test method should be sufficiently accurate for comparative testing. The reproducibility of a test method should be sufficiently accurate for the determination of values which are declared and for checking these declared values. Uncertainty reporting is essential to ensure measured data ar
38、e interpreted in a correct way. Especially when data of measurements are compared between laboratories or when normative requirements are set up, it is necessary to know the uncertainty with which data can be measured. 6 IEC TR 62617:2015 IEC 2015 HOME LAUNDRY APPLIANCES UNCERTAINTY REPORTING OF MEA
39、SUREMENTS 1 Scope This Technical Report (TR) applies to uncertainty reporting of measurements of home laundry electrical appliances. It allows to estimate the uncertainty of a measured result and to predict the range of values that may be measured when the same appliance is measured in another labor
40、atory following the same measurement method. NOTE The provisions in this TR can also be used to evaluate other kinds of products. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated refe
41、rences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC TR 61923:1997, Household electrical appliances Method of measuring performance Assessment of repeatability and reproducibility ISO/IEC Guide 98-3:2008
42、, Uncertainty of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 repeatability conditions conditions where independent test results are obtained with the sam
43、e method on identical test items in the same laboratory by the same operator using the same equipment within short intervals of time SOURCE: IEC TR 61923:1997, 3.6 3.2 repeatability standard deviation standard deviation of test results obtained under repeatability conditions SOURCE: IEC TR 61923:199
44、7, 3.7 3.3 reproducibility conditions conditions where test results are obtained with the same method on identical test items in different laboratories with different operators using different equipment SOURCE: IEC TR 61923:1997, 3.9 IEC TR 62617:2015 IEC 2015 7 3.4 reproducibility standard deviatio
45、n standard deviation of test results obtained under reproducibility conditions SOURCE: IEC TR 61923:1997, 3.10 3.5 statistical uncertainty repeatability standard deviation obtained in one laboratory under repeatability conditions 3.6 expanded uncertainty confidence interval, which allows to calculat
46、e the minimum and maximum value where the average measured result may be found when the measurement is re-done at any other laboratory following reproducibility conditions 4 The approach to uncertainty measurement 4.1 The importance of the uncertainty When a measurement has been performed giving a f
47、igure as a result for some quantity (i.e. the measurand), how sure is this figure? In other words: if the measurement is repeated, will the same figure be achieved as the result? if another group or another laboratory performs the measurement, how close will the results expected to be? By means of a
48、n uncertainty amount an uncertainty interval y U may be calculated, where y is the measurement result and U the expanded uncertainty that is determined to give the interval a high probability (often 95%) to cover the true value, y, of the measurand. U is said to be the uncertainty associated with th
49、e result y. The uncertainty interval of a measurement is therefore a basis for qualifying the measurement. The more narrow the confidence interval is desired, i.e. the smaller the value of the uncertainty U is pursued, the more careful the measurement method, the measuring equipment, the training of the operators and the number of repetitions of the same experiment have to be. 4.2 Ways to access uncertainty There are in principle two ways to estimate uncertainty: a bottom up met
