IEC 60704-2-10:2011
(Main)Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-10: Particular requirements for electric cooking ranges, ovens, grills, microwave ovens and any combination of these
Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-10: Particular requirements for electric cooking ranges, ovens, grills, microwave ovens and any combination of these
IEC 60704-2-10:2011 applies to electric cooking ranges, ovens, grills, microwave ovens and any combination of these for household and similar use. This standard does not apply to appliances or parts of appliances that use gas energy. This second edition cancels and replaces the first edition published in 2004 and constitutes a technical revision. Compared to the first edition (2004) of this Part 2-10, this second edition doesn't contain the description of an appropriate test enclosure which has now been incorporated in Part 1.
This publication is to be read in conjunction with IEC 60704-1:2010.
Appareils électrodomestiques et analogues - Code d'essai pour la détermination du bruit aérien - Partie 2-10: Règles particulières pour les cuisinières, les fours, les grils, les fours à micro-ondes et toute combinaison de ces appareils
La CEI 60704-2-10:2011 s'applique aux cuisinières, aux fours, aux grils, aux fours à micro-ondes et à toutes les combinaisons de ces appareils électriques pour usages domestiques et analogues. La présente norme ne s'applique pas aux appareils ou parties d'appareils fonctionnant au gaz. Cette deuxième édition annule et remplace la première édition parue en 2004 et constitue une révision technique. Par rapport à la première édition (2004) de cette Partie 2-10, cette deuxième édition ne comporte pas la description d'un meuble d'essai approprié qui est maintenant incorporé dans la Partie 1.
Cette publication doit être lue conjointement avec la CEI 60704-1:2010.
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Standards Content (Sample)
IEC 60704-2-10 ®
Edition 2.0 2011-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Test code for the determination of
airborne acoustical noise –
Part 2-10: Particular requirements for electric cooking ranges, ovens, grills,
microwave ovens and any combination of these
Appareils électrodomestiques et analogues – Code d'essai pour la détermination
du bruit aérien –
Partie 2-10: Règles particulières pour les cuisinières, les fours, les grils, les fours
à micro-ondes et toute combinaison de ces appareils
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IEC 60704-2-10 ®
Edition 2.0 2011-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Test code for the determination of
airborne acoustical noise –
Part 2-10: Particular requirements for electric cooking ranges, ovens, grills,
microwave ovens and any combination of these
Appareils électrodomestiques et analogues – Code d'essai pour la détermination
du bruit aérien –
Partie 2-10: Règles particulières pour les cuisinières, les fours, les grils, les fours
à micro-ondes et toute combinaison de ces appareils
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX M
ICS 17.140.20; 97.040.20 ISBN 978-2-88912-662-0
– 2 – 60704-2-10 © IEC:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
TEST CODE FOR THE DETERMINATION
OF AIRBORNE ACOUSTICAL NOISE –
Part 2-10: Particular requirements for electric cooking ranges,
ovens, grills, microwave ovens and any combination of these
FOREWORD
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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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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.
International Standard IEC 60704-2-10 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.
This second edition cancels and replaces the first edition published in 2004 and constitutes
an adaptation to the third edition of IEC 60704-1(2010).
Compared to the first edition (2004) of this Part 2-10, this second edition doesn’t contain the
description of an appropriate test enclosure which has now been incorporated in Part 1.
60704-2-10 © IEC:2011 – 3 –
The text of this standard is based on the following documents:
FDIS Report on voting
59K/224/FDIS 59K/228/RVD
Full information on the voting for the approval of this standard 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.
This Part 2-10 is intended to be used in conjunction with IEC 60704-1:2010 (3rd edition)
Household and similar electrical appliances – Test code for the determination of airborne
acoustical noise – Part 1: General requirements.
NOTE When “Part 1” is mentioned in this standard, it refers to IEC 60704-1.
This Part 2-10 supplements or modifies the corresponding clauses in IEC 60704-1, so as to
establish the test code for electric cooking ranges, ovens, grills, microwave ovens and any
combination of these. When a particular subclause of Part 1 is not mentioned in this Part 2-
10, that subclause is applicable as far as reasonable. Where this Part 2-10 states "addition",
"modification" or "replacement", the relevant requirements, test specifications or explanatory
matter in Part 1 is to be adapted accordingly.
Subclauses, tables and figures that are numbered starting from 101 are additional to those in
Part 1.
Unless notes are in a new subclause or involve notes in Part 1, they are numbered starting
from 101, including those in a replaced clause or subclause.
Additional annexes are lettered AA, BB, etc.
A list of all the parts in the IEC 60704 series, under the general title Household and similar
electrical appliances – Test code for the determination of airborne acoustical noise, can be
found on the IEC website.
The committee has decided that the contents of this publication 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.
– 4 – 60704-2-10 © IEC:2011
INTRODUCTION
The measuring conditions specified in this Part 2-10 of IEC 60704 provide for sufficient
accuracy in determining the noise emitted and comparing the results of measurements taken
by different laboratories, whilst simulating as far as possible the practical use of electric
cooking ranges, ovens, grills, microwave ovens and any combination of these.
It is recommended to consider the determination of noise levels as part of a comprehensive
testing procedure covering many aspects of the properties and performance of household
appliances.
Compared to the first edition (2004) of this Part 2-10, the second edition doesn’t contain the
description of an appropriate test enclosure which has now been incorporated in Part 1.
NOTE As stated in the Introduction to IEC 60704-1, this test code is concerned with airborne noise only.
60704-2-10 © IEC:2011 – 5 –
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
TEST CODE FOR THE DETERMINATION
OF AIRBORNE ACOUSTICAL NOISE –
Part 2-10: Particular requirements for electric cooking ranges,
ovens, grills, microwave ovens and any combination of these
1 Scope and object
This clause of Part 1 is applicable except as follows:
1.1 Scope
1.1.1 General
Addition:
These particular requirements apply to electric cooking ranges, ovens, grills, microwave
ovens and any combination of these for household and similar use.
NOTE 101 These particular requirements do not apply to hobs due to lack of standardised load (pans)
representative of normal use and ensuring a good repeatability of tests. For these applications, the loading and
operating conditions are under consideration.
This standard does not apply to appliances or parts of appliances that use gas energy.
1.1.2 Types of noise
Replacement:
The methods specified in ISO 3743-1, ISO 3743-2 and ISO 3744 can be used for measuring
noise emitted by electric cooking ranges, ovens, grills, microwave ovens and any combination
of these.
1.1.3 Size of the source
Replacement:
The method specified in ISO 3744 is applicable to noise sources of any size. When applying
ISO 3743-1 and ISO 3743-2, care should be taken that the maximum size of the appliance
under test fulfils the requirements specified in 1.3 of ISO 3743-1:1994 and ISO 3743-2:1994.
1.2 Object
Addition:
The methods described are specified for appliances without an operator present.
Requirements for the declaration of noise emission values are not within the scope of this
standard.
NOTE 101 For determining and verifying noise emission values declared in product specifications, see
IEC 60704-3.
– 6 – 60704-2-10 © IEC:2011
1.3 Measurement uncertainty
Replacement:
The estimated values of standard deviations of sound power levels, determined according to
this standard, are as follows:
Table 101 – Standard deviations of sound power levels
Standard deviation
dB
σ (repeatability) σ (reproducibility)
r R
0,4 1,0
1.101 Standard deviation for declaration and verification
For the purpose of determining and verifying declared noise emission values according to
IEC 60704-3, the following values apply:
Table 102 – Standard deviations for declaration and verification
Standard deviation
dB
σ (production) σ (total) σ (reference)
P t M
1,0 – 1,7 1,4 – 2,0 2,0
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
ISO 7235:2003, Acoustics - Laboratory measurement procedures for ducted silencers and air-
terminal units - Insertion loss, flow noise and total pressure loss
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
Addition:
3.101
cooking range
appliance having a hob and at least one oven; it may incorporate a grill
[IEC 60350:1999, definition 3.1]
3.102
hob
appliance or part of an appliance which incorporates one or more cooking zones
[IEC 60350:1999, definition 3.2]
NOTE 101 A hob is also known as a cook top.
60704-2-10 © IEC:2011 – 7 –
3.103
oven
appliance or compartment of a cooking range in which food is cooked by radiation, by natural
convection, by forced-air circulation, by steam or by a combination of these heating methods
[IEC 60350:1999, definition 3.10]
3.104
grill
appliance or part of an appliance in which food is cooked by radiant heat
[IEC 60350:1999, definition 3.9]
3.105
steam function
function by which food is heated with steam up to boiling temperature of water at ambient
pressure
3.106
hot steam function
function by which food is heated with hot steam (T > 100 °C) at ambient pressure
[Amendment 1:2005 of IEC 60350:1999, definition 3.18 modified]
3.107
forced air circulation function
heat transmission to the food by forced air convection, i.e. circulating the air with the help of a
fan
[Amendment 1:2005 of IEC 60350:1999, definition 3.17]
NOTE 101 This does not include circulated functions that operate a grill element only.
3.108
microwave oven
appliance using electromagnetic energy in the ISM frequency band of 2450 MHz for heating
food and beverages in the cavity
[IEC 60705:2010, definition 3.1]
NOTE 101 The microwave oven may incorporate a browning element.
NOTE 102 ISM frequency bands are the electromagnetic frequencies established by the ITU and reproduced in
CISPR 11.
3.109
other heating function
heating by energy other than microwave
3.110
cooling fan
fan integrated in an appliance for the purpose of avoiding excessive temperatures
– 8 – 60704-2-10 © IEC:2011
3.111
standard test load
for functions using microwave energy, a cylindrical container of borosilicate glass with a
maximum wall thickness of 3 mm, an outside diameter of approximately 190 mm and a height
of approximately 90 mm, filled with 1000 g ± 50 g of water at 20 °C ± 5 °C
NOTE 101 A glass rod or similar is placed in the glass container to prevent accidents due to the boiling delay
factor.
NOTE 102 To avoid noise from boiling water the load has to be changed before the measurements.
NOTE 103 Other heating functions are operated and measured without load.
4 Measurement methods and acoustical environments
This clause of Part 1 is applicable except as follows.
4.2 Direct method
Addition:
NOTE 101 If pure tone components are present in the noise emitted by the source, the estimated standard
deviation of the measured sound pressure levels in the special reverberation room may increase. In such cases
additional microphone positions or source positions may be necessary as specified in ISO 3743-2.
4.3 Comparison method
Addition:
NOTE 101 If pure tone components are present in the noise emitted by the source, the estimated standard
deviation of the measured sound pressure levels in the hard-walled test room or in the special reverberation room
may increase. In such cases additional microphone positions or source positions may be necessary as specified in
ISO 3743-1 or ISO 3743-2.
5 Instrumentation
This clause of Part 1 is applicable.
6 Operation and location of appliance under test
This clause of Part 1 is applicable except as follows.
6.1 Equipping and pre-conditioning of appliances
6.1.1
Replacement:
The appliance is equipped with drive units and accessories that are necessary to run the
motor(s). All other accessories for example roasting trays, oven cavity dividers, baking
sheets, grill grids etc. shall be removed.
If according to the manufacturer's instructions an appliance with integrated air extraction can
be connected to an exhaust device, the standard exhaust as described in Figure 101 shall be
connected. It consists of a pipe connected to a muffler. The pipe shall be metallic with smooth
inner walls and shall have the widest diameter among those specified by the manufacturer. If
not stated, a standard pipe with the best fitting diameter shall be used. The muffler shall have
an insertion loss as specified in the table of Figure 101. It shall have a circular section with
the same internal diameter as that of the pipe and a length as specified in Figure 101 and
shall not have protruding parts inside that may cause additional pressure drops. The pipe and
60704-2-10 © IEC:2011 – 9 –
the muffler shall also comply with all the specifications reported in Figure 101 and care shall
be taken that they do not radiate noise. Horizontal, vertical or inclined mounting of the pipe
and the muffler is possible. If the air outlet is located at the rear side of the appliance, a 90°
bend of the same type as the standard exhaust system shall be used for connection of the
appliance to the standard exhaust system.
6.1.2
Replacement:
Prior to noise measurements, the appliance, equipped according to 6.1.1, shall have been in
operation at maximum speed and power for at least 10 min. The load shall be chosen
according to 3.111.
6.1.3
Replacement:
Stabilising is included in operating, according to 6.4.2.
6.2 Supply of electrical energy and of water or gas
6.2.3 and 6.2.4 Not applicable.
6.4 Loading and operating of appliances during test
6.4.2
Replacement:
Unless otherwise specified in this standard, for each function settings shall be chosen that
produce the highest noise emission. As a result the highest noise emission value from all
functions shall be reported. Any cleaning mode shall be disregarded.
In the case of multiple cavity ovens, the multiple cavities shall be operated simultaneously.
NOTE 101 In general, the highest noise emission occurs at the highest air circulation, turntable speed, rotisserie
speed, fan speed, microwave power, etc. When provided, the manufacturer’s instructions should be taken into
account.
For microwave function, including all possible combined functions, a load according to 3.111
shall be applied. Measurements shall be started 2 min after switching on and shall be finished
before boiling occurs.
For other heating functions, temperature conditions shall be as follows:
• boiling temperature of water for steam function;
• 175 °C for ovens with forced air circulation heating function and hot steam function;
• 200 °C for all other heating functions;
• maximum setting for grill function.
Measurements shall be started when the specified temperature is reached. On grills,
measurements shall be started 15 min after switching on.
NOTE 102 If there is no indicator, reaching of the specified temperature could be controlled with a power meter.
– 10 – 60704-2-10 © IEC:2011
6.4.3 Not applicable.
6.5 Location and mounting of appliances
6.5.2 Not applicable.
6.5.3
Modification:
D = 25 cm ± 0,5 cm
7 Measurement of sound pressure levels
This clause of Part 1 is applicable except as follows.
7.1 Microphone array, measurement surface and RSS location for essentially free-
field conditions over reflecting plane(s)
7.1.4
Replacement:
For counter-top or table-type appliances, 7.1.2 applies.
7.1.5 to 7.1.6 Not applicable.
7.4 Measurements
7.4.1
Addition:
The averaging time shall be at least 30 s for a stable noise. In the case of varying noise
emission, the averaging time shall include at least 3 periods, each period being representative
for the varying noise.
8 Calculation of sound pressure and sound power levels
This clause of Part 1 is applicable.
9 Information to be recorded
This clause of Part 1 is applicable except as follows.
9.6.3 Not applicable.
9.7.4 Not applicable.
9.9.3
Replacement:
Function with the highest noise emission value.
60704-2-10 © IEC:2011 – 11 –
10 Information to be reported
This clause of Part 1 is applicable except as follows.
10.3.5 Not applicable.
l3 l2
1,1,5 x5 × d d
l3 l2
90°
90°
The muffler shall have the same internal diameter as
The muffler shall have the same internal diameter as
that of the pipe and shall have at least the insertion
that of the pipe and shall have at least the insertion
loss reported in the table below
loss reported in the table below.
l1
l1
The connections shall not interfere with the air flow to
The connections shall not interfere with the air flow to
avoid any additional noise or pressure drop
avoid any additional noise or pressure drop.
Pipe with smooth inner walls
Pipe with smooth inner walls
l1 + l2 + l3 = 3 000 mm
l1 + l2 + l3 = 3000 mm
This pipe bend
...
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