Home laundry appliances - Uncertainty reporting of measurements

IEC TR 62617:2015(E) 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 laboratory following the same measurement method. 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 washing machines according to IEC 60456:2010;
- expanded uncertainties for washer-dryer according to IEC 62512:2012;
- clarifications of the examples of expanded uncertainty calculation.

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Publication Date
02-Jan-2023
Current Stage
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Completion Date
03-Jan-2023
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IEC TR 62617
Edition 2.0 2015-11
TECHNICAL
REPORT
Home laundry appliances – Uncertainty reporting of measurements
IEC TR 62617:2015-11(en)
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IEC TR 62617
Edition 2.0 2015-11
TECHNICAL
REPORT
Home laundry appliances – Uncertainty reporting of measurements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 97.060 ISBN 978-2-8322-3033-6

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 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 approach 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 uncertainty of measurement in IEC 60456:2003 (4 edition) ................. 10

8.3 Expanded uncertainty of measurement in IEC 60456:2010 (5 edition) ................ 10

8.4 Expanded uncertainty of measurement in IEC 61121:2002 (3 edition) ................. 11

8.5 Expanded uncertainty of measurement in IEC 62512:2012 (1 edition) ................ 11

Bibliography .......................................................................................................................... 14

Table 1 – Expanded uncertainty of measured values of IEC 60456:2003 (4 edition)

for horizontal drum washing machine .................................................................................... 10

Table 2 – Expanded uncertainty of measured values of IEC 60456:2010 (5 edition)

for horizontal axis washing machines .................................................................................... 11

Table 3 – Expanded uncertainty of measured values of IEC 61121:2002 (3 edition)

for condenser tumble dryers ................................................................................................. 11

Table 4 – Expanded uncertainty of measured values of IEC 62512:2012 (1 edition)

for horizontal-axis washer-dryer ............................................................................................ 12

Table 5 – Expanded uncertainty of measured values of IEC 62512:2012 (1 edition)

for vertical-axis washer-dryer without heater ......................................................................... 13

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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 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

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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

example "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 replaces 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 washing machines according to IEC 60456:2010;

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– 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 Report 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 specifically 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,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
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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, which 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 manufacturers.

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 evaluating 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 repeatability 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 are 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.
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– 6 – IEC TR 62617:2015 © IEC 2015
HOME LAUNDRY APPLIANCES –
UNCERTAINTY REPORTING OF MEASUREMENTS
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 laboratory 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 references, 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, 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 same 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 61923:1997, 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]
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IEC TR 62617:2015 © IEC 2015 – 7 –
3.4
reproducibility standard deviation
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 calculate 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 unce
...

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