IEC 63399:2024

IEC 63399 ®
Edition 1.0 2024-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical rice cookers – Methods for measuring the
performance
Cuiseurs à riz électrodomestiques et analogues – Méthodes de mesure de
l'aptitude à la fonction
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IEC 63399 ®
Edition 1.0 2024-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical rice cookers – Methods for measuring the

performance
Cuiseurs à riz électrodomestiques et analogues – Méthodes de mesure de

l'aptitude à la fonction
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.040.50  ISBN 978-2-8322-9796-4

– 2 – IEC 63399:2024 © IEC 2024
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 List of measurements and tests . 7
5 General conditions for measurements . 8
5.1 General . 8
5.2 Test environment . 8
5.3 Limits of voltage variation . 8
5.4 Test voltage . 8
5.5 Test frequency . 8
5.6 Test electrical supply system . 8
5.7 Conditioning prior to the test . 8
5.8 Requirements for measurement instruments . 8
6 Measurements . 9
6.1 Cooking inner pot . 9
6.1.1 Volume of inner pot of rice cooker . 9
6.1.2 Endurance of the inner pot coatings – Abrasion resistance . 10
6.1.3 Endurance of the inner pot coatings – Corrosion resistance . 11
6.2 Cooking control . 12
6.2.1 Cooking uniformity . 12
6.2.2 Moisture deviation . 15
6.2.3 Burnt levels of the cooked rice . 17
6.3 Temperature retention during keep-warm state . 18
6.4 Energy efficiency . 18
6.4.1 Control setting . 18
6.4.2 Measurement of energy efficiency . 19
6.5 Power consumption . 19
6.5.1 Power consumption in stand-by mode . 19
6.5.2 Power consumption in reservation state . 19
6.5.3 Power consumption during keep-warm state . 20
6.6 Performance in low-voltage supply . 20
Annex A (informative) Physical characteristics of cooked rice . 21
A.1 Expansion rate . 21
A.2 Hardness and adhesiveness of cooked rice . 22
Annex B (informative) Different types of "white point" in the standard for reference of
the engineer for comparison . 24
Annex C (normative) Different burnt levels of the cooked rice . 27
Bibliography . 34

Figure 1 – Drawing of top edge of inner pot with filled water . 10
Figure 2 – Coating abrasion resistance test set up . 11
Figure 3 – Cooked rice divided into 12 equal parts . 12
Figure 4 – Evaluation procedures . 15
Figure 5 – Sampling positions of the rice for moisture content . 16

Figure 6 – Temperature change over time during keep-warm state . 18
Figure A.1 – Texture characteristics curve from measurement of texture analyser . 23
Figure B.1 – Reference pictures of "white points" . 26
Figure C.1 – Example of Level 1 of burnt condition . 27
Figure C.2 – Example of Level 2 of burnt condition . 27
Figure C.3 – Example of Level 3 of burnt condition . 28
Figure C.4 – Example of Level 4 of burnt condition . 28
Figure C.5 – Example of Level 5 of burnt condition . 29
Figure C.6 – Example of Level 6 of burnt condition . 29
Figure C.7 – Example of Level 7 of burnt condition . 30
Figure C.8 – Example of Level 8 of burnt condition . 30
Figure C.9 – Example of Level 9 of burnt condition . 31
Figure C.10 – Example of Level 10 of burnt condition . 31
Figure C.11 – Example of Level 11 of burnt condition . 32
Figure C.12 – Example of Level 12 of burnt condition . 32
Figure C.13 – Example of Level 13 of burnt condition . 33

Table A.1 – Texture analyser measuring parameters . 22

– 4 – IEC 63399:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL RICE COOKERS –
METHODS FOR MEASURING THE PERFORMANCE

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 Commit
...