IEC 60705:2010

IEC 60705 ®
Edition 4.1 2014-06
CONSOLIDATED
VERSION
VERSION
CONSOLIDÉE
colour
inside
Household microwave ovens – Methods for measuring performance

Fours à micro-ondes à usage domestique – Méthodes de mesure de l'aptitude
à la fonction
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.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

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.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing more than 30 000 terms and
Technical Specifications, Technical Reports and other definitions in English and French, with equivalent terms in 14
documents. Available for PC, Mac OS, Android Tablets and additional languages. Also known as the International
iPad. Electrotechnical Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a More than 55 000 electrotechnical terminology entries in
variety of criteria (reference number, text, technical English and French extracted from the Terms and Definitions
committee,…). It also gives information on projects, replaced clause of IEC publications issued since 2002. Some entries
and withdrawn publications. have been collected from earlier publications of IEC TC 37,

77, 86 and CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: csc@iec.ch.
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient plus de 30 000 termes et définitions en
Spécifications techniques, Rapports techniques et autres
anglais et en français, ainsi que les termes équivalents dans
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
14 langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.

Recherche de publications IEC - www.iec.ch/searchpub
Glossaire IEC - std.iec.ch/glossary
Plus de 55 000 entrées terminologiques électrotechniques, en
La recherche avancée permet de trouver des publications IEC
en utilisant différents critères (numéro de référence, texte, anglais et en français, extraites des articles Termes et
comité d’études,…). Elle donne aussi des informations sur les Définitions des publications IEC parues depuis 2002. Plus
projets et les publications remplacées ou retirées. certaines entrées antérieures extraites des publications des

CE 37, 77, 86 et CISPR de l'IEC.
IEC Just Published - webstore.iec.ch/justpublished

Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications IEC. Just
Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur cette
Disponible en ligne et aussi une fois par mois par email. publication ou si vous avez des questions contactez-nous:
csc@iec.ch.
IEC 60705 ®
Edition 4.1 2014-06
CONSOLIDATED
VERSION
VERSION
CONSOLIDÉE
colour
inside
Household microwave ovens – Methods for measuring performance

Fours à micro-ondes à usage domestique – Méthodes de mesure de l'aptitude

à la fonction
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.040.20 ISBN 978-2-8322-1692-7

IEC 60705 ®
Edition 4.1 2014-06
REDLINE VERSION
VERSION REDLINE
colour
inside
Household microwave ovens – Methods for measuring performance

Fours à micro-ondes à usage domestique – Méthodes de mesure de l'aptitude
à la fonction
– 2 – IEC 60705:2010
+AMD1:2014  IEC 2014
CONTENTS
FOREWORD . 5
INTRODUCTION to Amendment 1 . 7
1  Scope . 8
2  Normative references . 8
3  Terms and definitions . 8
4  Classification . 10
4.1  According to type . 10
4.2  According to characteristics . 10
5  List of measurements . 10
6  General conditions for measurements . 11
6.1  General . 11
6.2  Supply voltage . 12
6.3  Test room . 12
6.4  Water . 12
6.5  Initial condition of the oven . 12
6.6  Control setting . 12
6.7 Instruments and measurements . 13
6.8 Positioning the appliance . 13
7  Dimensions and volume . 13
7.1  External dimensions . 13
7.2  Usable internal dimensions and usable calculated volume . 14
7.2.1  General . 14
7.2.2  Usable height . 17
7.2.3  Usable width . 17
7.2.4  Usable depth . 18
7.2.5  Reciprocating tray . 18
7.2.6 Usable Calculated volume . 18
7.2.7 Dimensions of food support . 18
7.3  Overall internal dimensions and overall volume . 18
7.3.1  General . 18
7.3.2  Overall height (H) . 19
7.3.3  Overall width (W) . 19
7.3.4  Overall depth (D) . 19
7.3.5  Overall volume of rectangular cavities . 19
7.3.6  Overall volume of non-rectangular cavities . 19
8  Determination of microwave power output . 19
9  Efficiency . . 20
10  Technical tests for performance . 21
10.1  General . 21
10.2  Square tank test . 21
10.2.1  Procedure . 21
10.2.2  Evaluation . 22
10.3  Multiple cup test . 22
10.3.1  Procedure . 22
10.3.2  Evaluation . 25

+AMD1:2014  IEC 2014
11  Heating performance . 25
11.1  Heating beverages . 25
11.1.1  General . 25
11.1.2  Procedure . 25
11.1.3  Evaluation . 26
11.2  Heating simulated food . 26
11.2.1  Test purpose . 26
11.2.2  Procedure . 26
11.2.3  Evaluation . 27
12  Cooking performance . 27
12.1  General . 27
12.2  Evaluation . 27
12.3  Tests . 28
12.3.1  Egg custard . 28
12.3.2  Sponge cake . 28
12.3.3  Meatloaf . 29
12.3.4  Potato gratin . 30
12.3.5  Cake . 31
12.3.6  Chicken . 31
13  Defrosting performance . 32
13.1  General . 32
13.2  Evaluation . 32
13.3  Meat defrosting . 33
13.3.1  Purpose of test . 33
13.3.2  Container . 33
13.3.3  Ingredients . 34
13.3.4  Procedure . 34
14  Energy consumption for the microwave function . 35
14.1 General . 35
14.2 Test load . 35
14.3 Preparation . 35
14.4 Positioning the load in the appliance . 36
14.5 Measurement of energy consumption for a cooking cycle . 36
14.6 Calculation for the energy consumption of a cooking cycle . 37
14.7 Final result . 38
14.8 Reporting of test results . 38
15  Consumption measurement of low power modes . 38
Annex A (informative) Regional defrosting tests . 40
Annex B (informative) Dishes for Clause 12 and 13 . 42
Annex C (informative) Stirrer . 43
Annex D (informative) Glass container for Clauses 8 and 14 . 44
Annex E (informative) Data and calculation sheet: Energy consumption for a cooking
cycle with microwave function (Clause 14) . 45
Annex F (informative) Energy consumption for the cooling down period . 47
Bibliography . 49

Figure 1 – External dimensions of the microwave oven . 14

– 4 – IEC 60705:2010
+AMD1:2014  IEC 2014
Figure 2a – Gauge for determining the usable volume. 15
Figure 2 – Usable internal dimensions . 17
Figure 3 – Square tank . 21
Figure 4 – Cup . . 23
Figure 5 – Cup positions for the test of 10.3 . 24
Figure 6 – Cup position for the test of 11.1 . 25
Figure 7 – Rectangular tank . 26
Figure 8 – Shallow dish . 34
Figure C.1 – Plastic stirring adapter . 43
Figure C.2 – Example stirrer . 43
Figure D.1 – Example: small beaker (600 ml) . 44
Figure F.1 – Phases of energy consumption measurement – example . 48

Table 1 – List of measurements . 11
Table 2 – Instruments . 13
Table 3 – Measurements . 13
Table 4 – Test loads for measuring the energy consumption . 35
Table D.1 – Specification – glass containers . 44

+AMD1:2014  IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD MICROWAVE OVENS –
METHODS FOR MEASURING 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 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 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.
This Consolidated version of IEC 60705 bears the edition number 4.1. It consists of the
fourth edition (2010-04) [documents 59K/195/FDIS and 59K/198/RVD] and its
amendment 1 (2014-06) [documents 59K/252/FDIS and 59K/255/RVD]. The technical
content is identical to the base edition and its amendment.
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendment 1. Additions and deletions are displayed in red, with deletions
being struck through. A separate Final version with all changes accepted is available in
this publication.
This publication has been prepared for user convenience.

– 6 – IEC 60705:2010
+AMD1:2014  IEC 2014
International Standard IEC 60705 has been prepared by subcommittee 59K: Ovens and
microwave ovens, cooking ranges and similar appliances, of IEC technical committee 59:
Performance of household and similar electrical appliances.
The main changes from the previous edition are as follows:
– the definition of rounding is given in 3.5;
– the usable volume and the overall volume are respectively determined in 7.2 and 7.3.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
In this standard, the following print types are used:
– test specifications: in italic type
– notes: in small roman type
– other texts: in roman type.
Words in bold in the text are defined in Clause 3.
This standard contains an attached file in the form of an Excel® 97-2003 data sheet program.
This file is intended to be used as a complement and does not form an integral part of the
standard.
The following differences exist in some countries:
Clause 7: Metric dimensional measures are not in common use (USA).
The committee has decided that the contents of the base publication and its amendment will
remain unchanged until the stability 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.
IMPORTANT – The “colour inside” logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this publication using a colour printer.

___________
Excel® is the trademark of a product supplied by Microsoft®. This information is given for the convenience of
users of this document and does not constitute an endorsement by IEC of the product named. Equivalent
products may be used if they can be shown to lead to the same results.

+AMD1:2014  IEC 2014
INTRODUCTION to Amendment 1
This amendment includes the following significant technical changes:
– the usable volume is renamed to calculated volume and the measurement method for the
calculated volume is revised (see 7.2), which is in accordance with IEC 60350-1;
– new definitions for microwave function, combination microwave function, set to off
mode, set to standby mode, cooling down period and food support in Clause 3;
– a method for measuring the energy consumption of the microwave function in Clause 14;
– more precise requirements for instruments and measurements in Table 2;
– additional product specific requirements for measuring the energy consumption of low
power modes in Clause 15;
– a method for measuring the energy consumption for the cooling down period in Annex F
(informative).
– 8 – IEC 60705:2010
+AMD1:2014  IEC 2014
HOUSEHOLD MICROWAVE OVENS –
METHODS FOR MEASURING PERFORMANCE

1 Scope
This International Standard applies to microwave ovens for household use. It also applies to
combination microwave ovens.
This standard defines the main performance characteristics of household microwave ovens
which are of interest to the user, and it specifies methods for measuring these characteristics.
NOTE 1 This standard does not deal with
– microwave ovens which cannot accept a load having a diameter of ≥ 200 mm or a height of ≥ 120 mm;
*
– safety requirements (see IEC 60335-2-25 [1] and IEC 60335-2-90 [2]).
NOTE 2 This standard does not apply to ovens incorporating conventional heating means only (see IEC 60350) [3].
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 60350-1:2011, Household electric cooking appliances – Part 1: Ranges, ovens, steam
ovens and grills – Methods for measuring performance
IEC 60584-2, Thermocouples – Part 2: Tolerances
IEC 62301:2011, Household electrical appliances – Measurement of standby power
ISO 80000-1:2009, Quantities and units – Part 1: General
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
3.1
microwave oven
appliance using electromagnetic energy in the ISM frequency band of 2 450 MHz, for heating
food and beverages in the cavity
NOTE 1 The microwave oven may incorporate a browning element.
NOTE 21 ISM frequency bands are the electromagnetic frequencies established by the ITU and reproduced in
CISPR 11 [4].
___________
*
Figures in square brackets refer to the bibliography.

+AMD1:2014  IEC 2014
3.2
combination microwave oven
microwave oven in which the microwave energy is combined with thermal energy
NOTE Energy transfer by steam is included in the term thermal heat.
3.3
microwave transparent
property of a material having negligible absorption and reflection of microwaves
NOTE The relative permittivity of a microwave transparent material is less than 7 and the relative loss factor is less
than 0,015.
3.4
rated voltage
voltage assigned to the appliance by the manufacturer
3.5
microwave function
heat transfer exclusively by electromagnetic energy in the ISM frequency band of 2 450 MHz
3.6
combination microwave function
heat transfer by electromagnetic energy simultaneously or sequentially with thermal heat
NOTE Thermal heat can be a conventional heating function, a forced air circulation function, a hot steam function or
steam function. These functions are defined in 3.12 to 3.15 of IEC 60350-1:2011.
3.7
set to off mode
action where the product is switched off using appliance controls or switches that are
accessible and intended for operation by the user during normal use to attain the lowest power
consumption that may persist for an indefinite time while connected to a main power source
and used in accordance with the manufacturer’s instructions
NOTE 1 All actions required to set to off mode like for example empty the water tank, remove food, close the door,
etc. have to be taken.
NOTE 2 See 3.5 of IEC 62301:2011 for the definition of "off mode".
3.8
set to standby mode
action where the product is switched to standby using appliance controls or switches that are
accessible and intended for operation by the user during normal use to attain the lowest power
consumption that may persist for an indefinite time while connected to a main power source
and used in accordance with the manufacturer’s instructions
NOTE See 3.6 of IEC 62301:2011 for the definition of "standby mode".
3.9
cooling down period
unstable condition persisting after completion of the active mode and the appliance is set to
off mode where the power consumption may change without any intervention by the user
3.10
food support
horizontal support in the cavity on which the load is placed
NOTE If the appliance is fitted with a turntable, the turntable is the food support. The food support can also be a
shelf or a reciprocating tray. If recommended by manufacturer’s instruction also the cavity bottom can be the food
support.
– 10 – IEC 60705:2010
+AMD1:2014  IEC 2014
4 Classification
Appliances are classified according to their type and characteristics.
4.1 According to type
– Microwave ovens
– Combination microwave ovens
The manufacturers shall define the primary cooking function of the appliance, microwave
function or thermal heat. The primary cooking function has to be measured with an existing
method according to energy consumption.
If the primary cooking function is declared as a microwave function IEC 60705 shall be
applied for energy consumption measurement. If the primary cooking function is declared as a
thermal heat IEC 60350-1 shall be applied for energy consumption measurement.
NOTE There is currently no measurement method for the energy consumption for grilling and steam functions.
The type of oven shall be stated in the report.
4.2 According to characteristics
– Usable cavity dimensions
– With or without a turntable
– Dimensions of shelves
– Moved food support, e.g. reciprocating tray, turntable
– Possible thermal heating modes (grilling, hot air, steam function etc.).
The characteristics of the oven shall be stated in the report.
5 List of measurements
Performance is measured by the tests listed in Table 1.

+AMD1:2014  IEC 2014
Table 1 – List of measurements
a
Item of measurement Clause or Reproducibility Microwave ovens Combination
subclause microwave ovens
External dimensions 7.1 Yes * *
Usable internal cavity 7.2 Yes * *
dimensions and usable
volume
Overall internal dimensions 7.3 Yes * *
and overall Calculated
cavity volume
Microwave power output 8 Yes *
Efficiency 9 Yes *
Square tank 10.2 11.1 Yes *
Multiple cup 10.3 11.2 Yes *
Heating beverages 11.1 12.1 Yes *
Heating simulated food 11.2 12.2 Yes *
Egg custard 12.3.1 13.3.1 No *
Sponge cake 12.3.2 13.3.2 No *
Meatloaf 12.3.3 13.3.3 No *
Potato gratin 12.3.4 13.3.4 No  *
Cake 12.3.5 13.3.5 No  *
Chicken 12.3.6 13.3.6 No *
Meat defrosting 13.3 No *
Energy consumption for the 14 Yes *
microwave function
Consumption measurement of 15 Yes * *
low power modes
* Test is applicable.
a
Except for the tests of 10.2 11.1, these tests are also applicable to combination microwave ovens when operated
in the microwave only mode.
The methods described in Clauses 8 and 14 are only applicable for appliances with microwave
function. If a combination microwave oven does not provide a microwave function the tests
are not applicable. The energy consumption measurement cannot be carried out with
combined microwave function.
6 General conditions for measurements
6.1 General
Unless otherwise specified, the measurements are made under the following conditions.
When a metal turn table or any metal accessories are food support is provided and used for
the measurements, the load position and the corresponding shape of the metal turn table or
any metal accessories food support shall be reported, together with the test results.
If not otherwise specified the food support is placed in the cavity in its lowest position.
NOTE The positioning influences the repeatability of the test results.

– 12 – IEC 60705:2010
+AMD1:2014  IEC 2014
If numbers have to be rounded, they shall be rounded to the nearest 50 W according to ISO
80000-1:2009, Annex B.3 Rule B. If the rounding takes place to the right of the comma, the
omitted places shall not be filled with Zeros.
6.2 Supply voltage
The appliance is supplied supply voltage shall be maintained at the main terminal at rated
voltage ±1 %, while the microwave operation is switched on. If the appliance has a rated
voltage range, the tests are carried out at the nominal voltage of the country where the
appliance is intended to be used. This voltage is stated in the report. The supply frequency
shall be at rated frequency ±1 %.
The supply voltage measured during the tests shall be recorded.
The supply voltage shall be essentially sinusoidal.
NOTE 1 The supply voltage should be essentially sinusoidal. Results of the tests may otherwise be affected. For
recording the supply voltage only the power on period is relevant.
NOTE 2 In the case of a fixed cable, the plug (or the end of the cable furthest from the appliance) is the reference
point to maintain the voltage.
6.3 Test room
For the tests in Clauses 8, 14 and 15 the temperature shall be 23 °C ± 2 °C during the entire
test.
The measurement of the ambient temperature shall not be influenced by the appliance itself or
by any other appliance.
The other tests are carried out in a substantially draught-free room in which the ambient
temperature is maintained at 20 °C ± 5 °C.
6.4 Water
Potable water is used for the tests.
6.5 Initial condition of the oven
At the beginning of each test, the oven has not been operated for a period of at least 6 h.
– the temperatures of the magnetron and the power supply shall be within 5 K of the ambient
temperature, or
– the oven has not been operated for a period of at least 6 h. However, this period may be
reduced if it can be demonstrated that the microwave power output, as determined in
Clause 8, is available earlier.
NOTE 1 The period of at least 6 h can be reduced if it can be demonstrated that the temperatures of the magnetron
and the power supply is within 5 K of the ambient temperature and 2 K of the ambient temperature for tests Clauses
8 and 14.
NOTE 2 Forced cooling may be used to assist in reducing the oven temperature.
6.6 Control setting
The tests are carried out with the controls set to give the highest power output. Unless
otherwise specified the measurements are made with boost function, if available.

+AMD1:2014  IEC 2014
6.7 Instruments and measurements
Instruments used and measurements made for this document shall comply with the following
specifications detailed in Table 2 and Table 3.
Table 2 – Instruments
Parameter Unit Minimum Minimum Additional requirements
resolution accuracy
mass g 0,5 g ± 1 g
temperature
ambient temperature °C 0,1 °C ± 1 K
water load °C 0,1 °C 1 mm steel tube diameter,
± 1,5 K
class 1 according to
IEC 60584-2
time s 1 s ± 1 s
energy Wh – ± 1 %
Table 3 – Measurements
Parameter Unit Minimum Minimum Additional requirements
resolution accuracy
Electrical energy Wh ± 1,0 %
Voltage V ± 0,5 %
Temperature and energy sampling rate ≤ 1s

consumption measurement
For test Clause 15 and Annex F the according to IEC 62301
power measurement requirements
W
shall be in accordance with
IEC 62301
6.8 Positioning the appliance
Freestanding appliances are placed with their back against a wall and positioned away from
sidewalls, unless otherwise specified in the instructions. Other appliances are installed in
accordance with the instructions for installation.
7 Dimensions and volume
7.1 External dimensions
The overall height, width and depth of the appliance, excluding any knobs and handles on the
front surface, are measured. The depth is also measured with the door fully open. The
dimensions are shown in Figure 1. If adjustable feet are provided, the height of the appliance is
determined with the feet in their minimum and maximum positions.
The dimensions are stated in millimetres.

– 14 – IEC 60705:2010
+AMD1:2014  IEC 2014
h
w d
1 1
d
IEC  263/99
h height
w width
d depth
d depth with the door open
Figure 1 – External dimensions of the microwave oven
7.2 Usable internal dimensions and usable calculated volume
7.2.1 General
Removable items specified in the user instructions to be not essential for the operation of the
appliance in the manner for which it is intended shall be removed before measurement is
carried out.
The turntable is essential for the operation of the appliance therefore it is not removed.
NOTE Safe operation should be guaranteed. Therefore necessary parts, e.g. lamp cover, cannot be removed for
measuring the calculated volume.
The measurement of the usable oven volume is to be carried out at ambient temperature.
The height, width and depth of the usable calculated volume in the cavity shall be measured
according to 7.2.2 – 7.2.4.
For verification purposes a gauge, as shown in Figure 2a, shall be used to determine all of the
three dimensions. The gauge shall be used without appreciable force.
Dimensions are stated in millimetres.
Microwave ovens having a usable height of less than 120 mm are disregarded.

+AMD1:2014  IEC 2014
D
X
IEC  728/10
Key
D = 200 mm or 120 mm
X = dimension to be measured
(See Subclauses 7.2.2, 7.2.3 and 7.2.4)
Figure 2a – Gauge for determining the usable volume

– 16 – IEC 60705:2010
+AMD1:2014  IEC 2014
d
g
w
c
r
Turntable
Inside surface
of door
IEC  729/10
h
d
+AMD1:2014  IEC 2014
c
r
max
t
i
IEC  1938/14
Key
d usable depth t turntable
g heating element i inside surface of oven door
h  usable height w  usable width
c centre of rotation of the turntable r distance from c to the nearest wall
max
Figure 2b – Example of usable cavity dimensions
Figure 2 – Usable internal dimensions
7.2.2 Usable height
The usable height is the maximum length of a cylinder with a diameter of 200 mm reaching
vertically from the centre of the cooking cavity bottom (if it does not have a turntable) or from
the turntable to the lowest point on the ceiling. The lowest point of the ceiling can be
constituted by a lamp, a heating element or similar object in the area of the cylinder.
In the event that either the width or the depth of the cavity is less than 250 mm, the diameter of
the cylinder to be measured shall be reduced to 120 mm.
NOTE The centre of the cavity bottom is defined by the middle of the usable depth and the middle of the usable
width.
7.2.3 Usable width
The usable width is the maximum length of a cylinder with a diameter of 200 mm reaching
horizontally from the left-hand side wall to the right-hand side wall of the cavity.
In the event that either the height or the depth of the cavity is less than 250 mm, the diameter
of the cylinder to be measured shall be reduced to 120 mm.
NOTE The centre of the side wall of the cavity is defined by the middle of the usable depth and the middle of the
usable height.
d
– 18 – IEC 60705:2010
+AMD1:2014  IEC 2014
7.2.4 Usable depth
The usable depth is the maximum length of a cylinder with a diameter of 200 mm reaching
horizontally from the centre of the rear wall to the inner face of the closed door.
In the event that either the width or the height of the cavity is less than 250 mm, the diameter
of the cylinder to be measured shall be reduced to 120 mm.
For measuring the usable depth, the gauge is placed on a support in such a way that the axis
lies horizontally in the centre of the cavity, the axis being extended slightly over the expected
usable depth. The door is closed carefully so that the gauge is compressed to give the usable
depth.
NOTE The centre of the rear wall of the cavity is defined by the middle of the usable height and the middle of the
usable width.
7.2.5 Reciprocating tray
If there is a reciprocating tray, the extent of movement of the tray is measured and subtracted
from the usable dimension in the direction of reciprocation as measured above.
7.2.6 Usable Calculated volume
The usable volume is calculated from these dimensions and is given in litres rounded to the
next nearest full litre.
If the appliance has a turntable, the base area for the usable volume is determined by the
circular area formed by twice the minimum distance between the axis of rotation of the
turntable and the nearest wall or door multiplied with the usable height.
If the turntable can be switched off the rectangular volume from the dimensions width, height
and depth is calculated. Both circular and rectangular volumes are stated.
If it is permissible to operate the appliance with the cavity divided into two parts by the use of
components supplied with the appliance, the volume of each part shall be determined
separately and the two volumes are added together.
NOTE In any case the largest achievable total volume is to be reported.
7.2.7 Dimensions of food support
The usable width and usable depth of a rectangular f
...

IEC 60705 ®
Edition 4.2 2018-05
CONSOLIDATED
VERSION
VERSION
CONSOLIDÉE
colour
inside
Household microwave ovens – Methods for measuring performance

Fours à micro-ondes à usage domestique – Méthodes de mesure de l'aptitude
à la fonction
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.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
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.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 21 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

IEC publications search - webstore.iec.ch/advsearchform IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 67 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient 21 000 termes et définitions en anglais
Spécifications techniques, Rapports techniques et autres
et en français, ainsi que les termes équivalents dans 16
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.

Recherche de publications IEC -
Glossaire IEC - std.iec.ch/glossary
webstore.iec.ch/advsearchform
67 000 entrées terminologiques électrotechniques, en anglais
La recherche avancée permet de trouver des publications IEC et en français, extraites des articles Termes et Définitions des
en utilisant différents critères (numéro de référence, texte, publications IEC parues depuis 2002. Plus certaines entrées
comité d’études,…). Elle donne aussi des informations sur les antérieures extraites des publications des CE 37, 77, 86 et
projets et les publications remplacées ou retirées. CISPR de l'IEC.

IEC Just Published - webstore.iec.ch/justpublished Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications IEC. Just Si vous désirez nous donner des commentaires sur cette
Published détaille les nouvelles publications parues. publication ou si vous avez des questions contactez-nous:
Disponible en ligne et aussi une fois par mois par email. sales@iec.ch.

IEC 60705 ®
Edition 4.2 2018-05
CONSOLIDATED
VERSION
VERSION
CONSOLIDÉE
colour
inside
Household microwave ovens – Methods for measuring performance

Fours à micro-ondes à usage domestique – Méthodes de mesure de l'aptitude

à la fonction
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.040.20 ISBN 978-2-8322-5777-7

IEC 60705 ®
Edition 4.2 2018-05
REDLINE VERSION
VERSION REDLINE
colour
inside
Household microwave ovens – Methods for measuring performance

Fours à micro-ondes à usage domestique – Méthodes de mesure de l'aptitude
à la fonction
– 2 – IEC 60705:2010+AMD1:2014
+AMD2:2018 CSV © IEC 2018
CONTENTS
FOREWORD . 5
INTRODUCTION to Amendment 1 . 7
1 Scope . 8
2 Normative references. 8
3 Terms and definitions . 8
4 Classification . 10
4.1 According to type . 10
4.2 According to characteristics . 10
5 List of measurements . 10
6 General conditions for measurements . 12
6.1 General . 12
6.2 Supply voltage . 12
6.3 Test room . 12
6.4 Water . 13
6.5 Initial condition of the appliance . 13
6.6 Control setting . 13
6.7 Instruments and measurements . 13
6.8 Positioning the appliance . 14
7 Dimensions and volume . 14
7.1 External dimensions . 14
7.2 Usable internal dimensions and usable calculated volume . 15
7.2.1 General . 15
7.2.2 Usable height . 17
7.2.3 Usable width . 17
7.2.4 Usable depth . 18
7.2.5 Reciprocating tray . 18
7.2.6 Usable Calculated volume . 18
7.2.7 Dimensions of food support . 18
7.3 Overall internal dimensions and overall volume . 18
7.3.1 General . 18
7.3.2 Overall height (H) . 19
7.3.3 Overall width (W) . 19
7.3.4 Overall depth (D) . 19
7.3.5 Overall volume of rectangular cavities . 19
7.3.6 Overall volume of non-rectangular cavities . 19
8 Determination of microwave power output . 19
9 Efficiency . 20
10 Technical tests for performance . 21
10.1 General . 21
10.2 Square tank test . 21
10.2.1 Procedure . 21
10.2.2 Evaluation . 22
10.3 Multiple cup beakers test . 22
10.3.1 Procedure . 22

+AMD2:2018 CSV © IEC 2018
10.3.2 Evaluation . 25
11 Heating performance . 25
11.1 Heating beverages . 25
11.1.1 General . 25
11.1.2 Procedure . 25
11.1.3 Evaluation . 26
11.2 Heating simulated food . 26
11.2.1 Test purpose . 26
11.2.2 Procedure . 26
11.2.3 Evaluation . 27
12 Cooking performance . 27
12.1 General . 27
12.2 Evaluation . 27
12.3 Tests . 28
12.3.1 Egg custard . 28
12.3.2 Sponge cake . 28
12.3.3 Meatloaf . 29
12.3.4 Potato gratin . 30
12.3.5 Cake . 31
12.3.6 Chicken . 31
13 Defrosting performance . 32
13.1 General . 32
13.2 Evaluation . 32
13.3 Meat defrosting . 33
13.3.1 Purpose of test . 33
13.3.2 Container . 33
13.3.3 Ingredients . 34
13.3.4 Procedure . 34
14 Energy consumption for the microwave function . 35
14.1 General . 35
14.2 Test load . 35
14.3 Preparation . 35
14.4 Positioning the load in the appliance . 36
14.5 Measurement of energy consumption for a cooking cycle . 36
14.6 Calculation for the energy consumption of a cooking cycle . 37
14.7 Final result . 38
14.8 Reporting of test results . 38
15 Consumption measurement of low power modes . 38
Annex A (informative) Regional defrosting tests . 40
A.1 General . 40
A.2 Introduction . 40
A.3 Test methods . 40
A.4 Evaluation . 41
Annex B (informative) Dishes for Clause 12 and 13 . 42
Annex C (informative) Stirrer . 43
Annex D (informative) Glass container for Clauses 8 and 14 . 44
Annex E (informative) Data and calculation sheet: Energy consumption for a cooking
cycle with microwave function (Clause 14) . 45

– 4 – IEC 60705:2010+AMD1:2014
+AMD2:2018 CSV © IEC 2018
Annex F (informative) Energy consumption for the cooling down period . 47
Bibliography . 49

Figure 1 – External dimensions of the microwave oven . 14
Figure 2 – Usable internal dimensions . 17
Figure 3 – Square tank . 21
Figure 4 – Cup Beaker . 22
Figure 5 – Cup Beaker positions for the test of 10.3 . 24
Figure 6 – Cup Beaker position for the test of 11.1 . 25
Figure 7 – Rectangular tank . 26
Figure 8 – Shallow dish . 34
Figure C.1 – Plastic stirring adapter . 43
Figure C.2 – Example stirrer . 43
Figure D.1 – Example: small beaker (600 ml) . 44
Figure F.1 – Phases of energy consumption measurement – example . 48

Table 1 – List of measurements . 11
Table 2 – Instruments . 13
Table 3 – Measurements . 14
Table 4 – Test loads for measuring the energy consumption . 35
Table D.1 – Specification – glass containers . 44

+AMD2:2018 CSV © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
HOUSEHOLD MICROWAVE OVENS –
METHODS FOR MEASURING 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 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 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.
DISCLAIMER
This Consolidated version is not an official IEC Standard and has been prepared for
user convenience. Only the current versions of the standard and its amendment(s) are
to be considered the official documents.
This Consolidated version of IEC 60705 bears the edition number 4.2. It consists of the
fourth edition (2010-04) [documents 59K/195/FDIS and 59K/198/RVD], its amendment 1
(2014-06) [documents 59K/252/FDIS and 59K/255/RVD] and its amendment 2 (2018-05)
[documents 59K/297/FDIS and 59K/299/RVD]. The technical content is identical to the
base edition and its amendments.
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendments 1 and 2. Additions are in green text, deletions are in
strikethrough red text. A separate Final version with all changes accepted is available in
this publication.
– 6 – IEC 60705:2010+AMD1:2014
+AMD2:2018 CSV © IEC 2018
International Standard IEC 60705 has been prepared by subcommittee 59K: Ovens and
microwave ovens, cooking ranges and similar appliances, of IEC technical committee 59:
Performance of household and similar electrical appliances.
The main changes from the previous edition are as follows:
– the definition of rounding is given in 3.5;
– the usable volume and the overall volume are respectively determined in 7.2 and 7.3.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
In this standard, the following print types are used:
– test specifications: in italic type
– notes: in small roman type
– other texts: in roman type.
Words in bold in the text are defined in Clause 3.
This standard contains an attached file in the form of an Excel® 97-2003 data sheet program.
This file is intended to be used as a complement and does not form an integral part of the
standard.
The following differences exist in some countries:
Clause 7: Metric dimensional measures are not in common use (USA).
The committee has decided that the contents of the base publication and its amendments will
remain unchanged until the stability 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.
IMPORTANT – The “colour inside” logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this publication using a colour printer.

___________
Excel® is the trademark of a product supplied by Microsoft®. This information is given for the convenience of
users of this document and does not constitute an endorsement by IEC of the product named. Equivalent
products may be used if they can be shown to lead to the same results.

+AMD2:2018 CSV © IEC 2018
INTRODUCTION to Amendment 1
This amendment includes the following significant technical changes:
– the usable volume is renamed to calculated volume and the measurement method for the
calculated volume is revised (see 7.2), which is in accordance with IEC 60350-1;
– new definitions for microwave function, combination microwave function, set to off
mode, set to standby mode, cooling down period and food support in Clause 3;
– a method for measuring the energy consumption of the microwave function in Clause 14;
– more precise requirements for instruments and measurements in Table 2;
– additional product specific requirements for measuring the energy consumption of low
power modes in Clause 15;
– a method for measuring the energy consumption for the cooling down period in Annex F
(informative).
– 8 – IEC 60705:2010+AMD1:2014
+AMD2:2018 CSV © IEC 2018
HOUSEHOLD MICROWAVE OVENS –
METHODS FOR MEASURING PERFORMANCE

1 Scope
This International Standard document applies to microwave ovens for household use. It also
applies to microwave ovens with grills and combination microwave ovens.
This standard document defines the main performance characteristics of household microwave
ovens these appliances, which are of interest to the user, and it specifies methods for
measuring these characteristics.
NOTE 1 This standard document does not deal with
– microwave ovens that cannot accept a load having a diameter of ≥ 200 mm or a height of ≥ 120 mm;
– safety requirements (see IEC 60335-2-25 [1] and IEC 60335-2-90 [2]).
NOTE 2 This standard document does not apply to ovens incorporating conventional heating means only (see
IEC 60350) [3].
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 60350-1:2011, Household electric cooking appliances – Part 1: Ranges, ovens, steam
ovens and grills – Methods for measuring performance
IEC 60584-2, Thermocouples – Part 2: Tolerances
IEC 62301:2011, Household electrical appliances – Measurement of standby power
ISO 80000-1:2009, Quantities and units – Part 1: General
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
3.1
microwave oven
appliance using electromagnetic energy in one or several of the ISM frequency bands of 2
450 MHz between 300 MHz and 30 GHz, for heating food and beverages in the a cavity
NOTE 1 The microwave oven may incorporate a browning element.
NOTE 2 1 ISM frequency bands are the electromagnetic frequencies established by the ITU and reproduced in
CISPR 11 [4].
___________
Figures in square brackets refer to the Bibliography.

+AMD2:2018 CSV © IEC 2018
3.2
combination microwave oven
microwave oven in which the microwave energy is combined with thermal energy transfer by
forced air circulation, by conventional heating, by hot steam and by steam
Note 1 to entry: For definitions of a forced air circulation function, conventional heating function, hot steam
function and steam function, IEC 60350-1:2016 is relevant.
3.3
microwave transparent
property of a material having negligible absorption and reflection of microwaves
NOTE The relative permittivity of a microwave transparent material is less than 7 and the relative loss factor is less
than 0,015.
3.4
rated voltage
voltage assigned to the appliance by the manufacturer
3.5
microwave function
function using electromagnetic energy in one or several of the ISM frequency bands between
300 MHz and 30 GHz for heating food and beverages in a cavity
3.6
combination microwave function
heat transfer by electromagnetic energy simultaneously or sequentially with energy transfer by
forced air circulation, conventional heating, by hot steam or by steam
Note 1 to entry: For definitions of a forced air circulation function, conventional heating function, hot steam function
and steam function, IEC 60350-1:2016 is relevant.
3.7
set to off mode
action where the product is switched off using appliance controls or switches that are
accessible and intended for operation by the user during normal use to attain the lowest power
consumption that may persist for an indefinite time while connected to a main power source
and used in accordance with the manufacturer’s instructions
NOTE 1 All actions required to set to off mode like for example empty the water tank, remove food, close the door,
etc. have to be taken.
NOTE 2 See 3.5 of IEC 62301:2011 for the definition of "off mode".
3.8
set to standby mode
action where the product is switched to standby using appliance controls or switches that are
accessible and intended for operation by the user during normal use to attain the lowest power
consumption that may persist for an indefinite time while connected to a main power source
and used in accordance with the manufacturer’s instructions
NOTE See 3.6 of IEC 62301:2011 for the definition of "standby mode".
3.9
cooling down period
unstable condition persisting after completion of the active mode and the appliance is set to
off mode where the power consumption may change without any intervention by the user
3.10
food support
horizontal support in the cavity on which the load is placed

– 10 – IEC 60705:2010+AMD1:2014
+AMD2:2018 CSV © IEC 2018
NOTE If the appliance is fitted with a turntable, the turntable is the food support. The food support can also be a
shelf or a reciprocating tray. If recommended by manufacturer’s instruction also the cavity bottom can be the food
support.
3.11
microwave oven with grill
microwave oven in which microwave energy is combined with grill
Note 1 to entry: For a definition of a grill, IEC 60350-1:2016 is relevant.
3.12
microwave function with grill
heat transfer by electromagnetic energy simultaneously or sequentially with energy transfer by
radiant heat typically from the top
Note 1 to entry: For a definition of a grill, IEC 60350-1:2016 is relevant.
4 Classification
Appliances are classified according to their type and characteristics.
4.1 According to type
– Microwave ovens
– Combination microwave ovens
– Microwave oven with grill
The manufacturers shall define the primary cooking function of the appliance, microwave
function or thermal heat. The primary cooking function has to be measured with an existing
method according to energy consumption.
If the primary cooking function is declared as a microwave function IEC 60705 shall be
applied for energy consumption measurement. If the primary cooking function is declared as a
thermal heat IEC 60350-1 shall be applied for energy consumption measurement.
NOTE There is currently no measurement method for the energy consumption for grilling and steam functions.
The type of oven shall be stated in the report.
4.2 According to characteristics
– Usable cavity dimensions
– With or without a turntable
– Dimensions of shelves
– Moved food support, e.g. reciprocating tray, turntable
– Possible thermal heating modes (grilling, hot air, steam function etc.).
The characteristics of the oven shall be stated in the report.
5 List of measurements
Performance is measured by the tests listed in Table 1.
Table 1 shows which measurement shall be applied for which function.

+AMD2:2018 CSV © IEC 2018
Table 1 – List of measurements
a
Item of measurement Clause or Reproducibility Microwave ovens Combination
subclause microwave ovens
External dimensions 7.1 Yes * *
Usable internal dimensions 7.2 Yes * *
and usable volume
Overall internal dimensions 7.3 Yes * *
and overall
volume
Microwave power output 8 Yes *
Efficiency 9 Yes *
Square tank 10.2 Yes *
Multiple cup 10.3 Yes *
Heating beverages 11.1 Yes *
Heating simulated food 11.2 Yes *
Egg custard 12.3.1 No *
Sponge cake 12.3.2 No *
Meatloaf 12.3.3 No *
Potato gratin 12.3.4 No  *
Cake 12.3.5 No  *
Chicken 12.3.6 No *
Meat defrosting 13.3 No *
* Test is applicable.
a
Except for the tests of 10.2, these tests are also applicable to combination microwave ovens when operated in
the microwave only mode.
Measurements Clause or Applicable to
subclause
microwave microwave microwave microwave microwave
function function function in function in function in
with grill combination combination combination
with forced with hot with steam
air steam
circulation or
conventional
heating
Dimensions and
7 Applicable to all appliances which are under the scope.
volume
Microwave
8 x - - - -
power output
Efficiency 9 x - - - -
Square tank 10.2 x - - - -
Multiple cup 10.3 x - - - -
Heating
11.1 x - - - -
beverages
Heating
11.2 x - - - -
simulated food
Egg custard 12.3.1 x - - - x
Sponge cake 12.3.2 x - - - x
– 12 – IEC 60705:2010+AMD1:2014
+AMD2:2018 CSV © IEC 2018
Meatloaf 12.3.3 x - - - x
Potato gratin 12.3.4 - x x x -
Cake 12.3.5 - x x x -
Chicken 12.3.6 - x x x -
Meat defrosting 13.3 x - - - x
Energy
14 x - - - -
consumption
Consumption
measurement of
15 Applicable to all appliances which are under the scope.
low power
modes
For definition of grill, forced air circulation function, conventional heating function, hot steam function and steam
function IEC 60350-1:2016 is relevant.

6 General conditions for measurements
6.1 General
Unless otherwise specified, the measurements are made under the following conditions.
When a metal turn table or any metal accessories are food support is provided and used for
the measurements, the load position and the corresponding shape of the metal turn table or
any metal accessories food support shall be reported, together with the test results.
If not otherwise specified the food support is placed in the cavity in its lowest position.
NOTE The positioning influences the repeatability of the test results.
If numbers have to be rounded, they shall be rounded to the nearest 50 W according to ISO
80000-1:2009, Annex B.3 Rule B. If the rounding takes place to the right of the comma, the
omitted places shall not be filled with Zeros.
6.2 Supply voltage
The appliance is supplied supply voltage shall be maintained at the main terminal at rated
voltage ±1 %, while the microwave operation is switched on. If the appliance has a rated
voltage range, the tests are carried out at the nominal voltage of the country where the
appliance is intended to be used. This voltage is stated in the report. The supply frequency
shall be at rated frequency ±1 %.
The supply voltage measured during the tests shall be recorded.
The supply voltage shall be essentially sinusoidal.
NOTE 1 The supply voltage should be essentially sinusoidal. Results of the tests may otherwise be affected. For
recording the supply voltage only the power on period is relevant.
NOTE 2 In the case of a fixed cable, the plug (or the end of the cable furthest from the appliance) is the reference
point to maintain the voltage.
6.3 Test room
For the tests in Clauses 8, 14 and 15 the temperature shall be 23 °C ± 2 °C during the entire
test.
+AMD2:2018 CSV © IEC 2018
The measurement of the ambient temperature shall not be influenced by the appliance itself or
by any other appliance.
The other tests are carried out in a substantially draught-free room in which the ambient
temperature is maintained at 20 °C ± 5 °C.
6.4 Water
Potable water is used for the tests.
6.5 Initial condition of the oven appliance
At the beginning of each test, the appliance has not been operated for a period of at least 6 h.
– the temperatures of the magnetron and the power supply shall be within 5 K of the ambient
temperature, or
– the oven has not been operated for a period of at least 6 h. However, this period may be
reduced if it can be demonstrated that the microwave power output, as determined in
Clause 8, is available earlier.
NOTE 1 The period of at least 6 h can be reduced if it can be demonstrated that the temperatures of the magnetron
and the power supply is within 5 K of the ambient temperature and 2 K of the ambient temperature for tests Clauses
8 and 14.
NOTE 2 Forced cooling may be used to assist in reducing the oven appliance temperature.
6.6 Control setting
The tests are carried out with the controls set to give the highest power output. Unless
otherwise specified the measurements are made with boost function, if available.
6.7 Instruments and measurements
Instruments used and measurements made for this document shall comply with the following
specifications detailed in Table 2 and Table 3.
Table 2 – Instruments
Parameter Unit Minimum Minimum Additional requirements
resolution accuracy
mass g 0,5 g ± 1 g
temperature
ambient temperature °C 0,1 °C ± 1 K
water load °C 0,1 °C 1 mm steel tube diameter,
± 1,5 K
class 1 according to
IEC 60584-2
time s 1 s ± 1 s
energy Wh – ± 1 %
– 14 – IEC 60705:2010+AMD1:2014
+AMD2:2018 CSV © IEC 2018
Table 3 – Measurements
Parameter Unit Minimum Minimum Additional requirements
resolution accuracy
Electrical energy Wh ± 1,0 %
Voltage V
± 0,5 %
Temperature and energy
sampling rate ≤ 1s
consumption measurement
For test Clause 15 and Annex F the according to IEC 62301
power measurement requirements
W
shall be in accordance with
IEC 62301
6.8 Positioning the appliance
Freestanding appliances are placed with their back against a wall and positioned away from
sidewalls, unless otherwise specified in the instructions. Other appliances are installed in
accordance with the instructions for installation.
7 Dimensions and volume
7.1 External dimensions
The overall height, width and depth of the appliance, excluding any knobs and handles on the
front surface, are measured. The depth is also measured with the door fully open. The
dimensions are shown in Figure 1. If adjustable feet are provided, the height of the appliance is
determined with the feet in their minimum and maximum positions.
The dimensions are stated in millimetres.
h
w d
1 1
d
IEC  263/99
h height
w width
d depth
d depth with the door open
Figure 1 – External dimensions of the microwave oven

+AMD2:2018 CSV © IEC 2018
7.2 Usable internal dimensions and usable calculated volume
7.2.1 General
Removable items specified in the user instructions to be not essential for the operation of the
appliance in the manner for which it is intended shall be removed before measurement is
carried out.
The turntable is essential for the operation of the appliance therefore it is not removed.
NOTE Safe operation should be guaranteed. Therefore necessary parts, e.g. lamp cover, cannot be removed for
measuring the calculated volume.
The measurement of the usable oven volume dimensions is to be carried out at ambient
temperature.
The height, width and depth of the usable calculated volume in the cavity shall be measured
according to 7.2.2 – 7.2.4.
For verification purposes a gauge, as shown in Figure 2a, shall be used to determine all of the
three dimensions. The gauge shall be used without appreciable force.
Dimensions are stated in millimetres.
Microwave ovens having a usable height of less than 120 mm are disregarded.

D
X
IEC  728/10
Key
D = 200 mm or 120 mm
X = dimension to be measured
(See Subclauses 7.2.2, 7.2.3 and 7.2.4)
Figure 2a – Gauge for determining the usable volume dimensions

– 16 – IEC 60705:2010+AMD1:2014
+AMD2:2018 CSV © IEC 2018
d
g
w
c
r
Turntable
Inside surface
of door
IEC  729/10
h
d
+AMD2:2018 CSV © IEC 2018
c
r
max
t
i
IEC  1938/14
Key
d usable depth t turntable
g heating element i inside surface of the door
h  usable height w  usable width
c centre of rotation of the turntable r distance from c to the nearest wall
max
Figure 2b – Example of usable cavity dimensions
Figure 2 – Usable internal dimensions
7.2.2 Usable height
The usable height is the maximum length of a cylinder with a diameter of 200 mm reaching
vertically from the centre of the cooking cavity bottom (if it does not have a turntable) or from
the turntable to the lowest point on the ceiling. The lowest point of the ceiling can be
constituted by a lamp, a heating element or similar object in the area of the cylinder.
In the event that either the width or the depth of the cavity is less than 250 mm, the diameter of
the cylinder to be measured shall be reduced to 120 mm.
NOTE The centre of the cavity bottom is defined by the middle of the usable depth and the middle o
...