IEC 60350-1:2023/AMD1:2025

IEC 60350-1 ®
Edition 3.0 2025-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Household electric cooking appliances –
Part 1: Ranges, ovens, steam ovens and grills – Methods for measuring
performance
Appareils de cuisson électrodomestiques –
Partie 1: Cuisinières, fours, fours à vapeur et grils – Méthodes de mesure de
l'aptitude à la fonction
IEC 60350-1:2023-03/AMD1:2025-04(en-fr)

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IEC 60350-1 ®
Edition 3.0 2025-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Household electric cooking appliances –

Part 1: Ranges, ovens, steam ovens and grills – Methods for measuring

performance
Appareils de cuisson électrodomestiques –

Partie 1: Cuisinières, fours, fours à vapeur et grils – Méthodes de mesure de

l'aptitude à la fonction
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.040.20  ISBN 978-2-8327-0310-6

– 2 – IEC 60350-1:2023/AMD1:2025
© IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD ELECTRIC COOKING APPLIANCES –

Part 1: Ranges, ovens, steam ovens and grills –
Methods for measuring performance

AMENDMENT 1
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
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6) All users should ensure that they have the latest edition of this publication.
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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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
Amendment 1 to IEC 60350-1:2023 has been prepared by subcommittee 59K: Performance of
household and similar electrical cooking appliances, of IEC technical committee 59:
Performance of household and similar electrical appliances.
The text of this Amendment is based on the following documents:
Draft Report on voting
59K/410/FDIS 59K/412/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
© IEC 2025
The language used for the development of this Amendment is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications/.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
___________
1 Scope
Delete, in Note 2, the second dash.
2 Normative references
Add the following new reference:
IEC 60705:2024, Household microwave ovens – Methods for measuring performance
Replace the dated reference to IEC 62301 by an undated reference.
Delete the footnote to IEC 63474.
3 Terms and definitions
3.17
Replace the definition with the following new definition:
standby mode
condition where the appliance is connected to the mains and provides only one or more of the
following functions, which can persist for an indefinite duration:
a) reactivation function;
b) reactivation function and only an indication of enabled reactivation function;
c) information or status display.

– 4 – IEC 60350-1:2023/AMD1:2025
© IEC 2025
Add the following new term and definition:
3.23
combination microwave oven
appliance which can be operated by microwave function, combination microwave function and
heating function
Note 1 to entry: For definitions of a microwave function and combination microwave function, IEC 60705 is relevant.
[SOURCE: IEC 60705:2024, 3.2, modified – The Note to entry has been replaced.]
4.2 Oven and combi steam oven
Add the following at the end of 4.2:
– power consumption of low power modes (see Clause 14).
4.3 Steam ovens and combi steam oven
Add the following at the end of 4.3:
– power consumption of low power modes (see Clause 14).
4.5 Warming compartments
Add the following at the end of 4.5:
– power consumption of low power modes (see Clause 14).
5.3 Instrumentation
Replace, in Table 2, the fourth row with the following:
Temperature measurement °C ± 1,0 K Excluding the thermocouples
Sampling rate ≥ 1/s
8 Energy consumption and time for heating a load
8.1 Purpose
Add the following at the end of 8.1:
For measuring the energy consumption in a combination microwave oven fitted with a
turntable, deviating requirements regarding the test setup are specified in Annex H.
Annex K shows the expanded uncertainties for measuring the energy consumption.
8.2 Symbols and abbreviations
Replace, in Table 3, the thirteenth row related to the s-factor with the following:
s ratio between the observer temperatures measured in phase 1 in the last 30 % of the whole
k
phase and the observer temperature in phase 1 in the second last 30 %

© IEC 2025
8.3.3 Preparation
Replace, in the fifth paragraph, the last sentence with the following:
The amount of absorbed water shall be as specified in Clause C.1.
8.4.3 Phase 1
Replace, in the third dash, the last sentence with the following:
Only if the grid is already placed on the lowest level, the centre of the brick may be higher than
the centre of the cavity.
8.5.6 Determining the s-factor
Replace the text of 8.5.6 with the following:
In the case that the heating mode is designated as a heating function, the s-factor shall be
determined in addition to the c-factor.
Determine the s -factor for each measurement.
k
The s -factor is the ratio between the observer temperatures measured in phase 1 in the last
k
30 % of the whole phase (= β) and the observer temperature in phase 1 in the second last 30 %
(= α), calculated as shown in Formula (16), Formula (17) and Formula (18):
T
o1,k,β
s = (16)
k
T
o1,k,α
where:
0,7i
k
TT= (17)
o1,k,α ∑ o1,k,j
0,3i
k
j=0,4i
k
i
k
TT= (18)
o1,k,β ∑ o1,k,j
0,3i
k
ji=0,7
k
where:
i is determined by i tf× ;
k k ks
α is i from 0,4 i until 0,7 i ;
k k k
β is i from 0,7 i until i .
k k k
The s , s and s for the heating function is rounded to two decimal places.
1 2 3
=
– 6 – IEC 60350-1:2023/AMD1:2025
© IEC 2025
For calculating the s-factor, s , s and s are averaged and rounded to two decimal places, as
1 2 3
shown in Formula (32).
ss++ s
12 3
s= (32)
The averaged value s and the single values, s , s and s are reported.
1 2 3
8.6.4 s-factor
Replace the text of 8.6.4 with the following:
The s -factors and the s-factor are used to show that a function designated as a heating
k
function does not use residual heat.
The s -factors calculated in 8.5.6 for a function designated as a heating function shall be
k
s ≥ 0,92.
k
The s-factor, i.e. the average value of the s -factors, calculated in 8.5.6. for a function
k
designated as a heating function shall be s ≥ 0,95.
8.9 Reporting of test results
Add, in the second paragraph, the following new item f):
f) the applied temperature measurement in the brick, i.e. with thermocouples in
accordance with Clause 8 or with data loggers in accordance with Annex H.
9.2.1.4 Preliminary measurements
Replace the note with the following new note:
NOTE Annex B recommends suppliers for the colour measuring instrument. IEC TS 63350 contains
recommendations for digital measuring systems.
14.2.1 Principles
Replace the first and second paragraphs with the following:
The requirements of IEC 62301 and IEC 63474 shall be applied in addition to the following
requirements.
However, instruments and measurements shall not be in accordance with 5.3 but with the
requirements set in IEC 62301.
Replace, in the seventh paragraph, the penultimate dash with the following:
– after each appliance interaction, wait at least 20 min before commencing with
measurements; and
© IEC 2025
14.2.4
Replace, in the third paragraph, the last sentence with the following:
Avoid any interaction with the remote user interface during the 20 min waiting time and the
measurement.
14.2.5
Replace, in the fourth paragraph, the last sentence with the following:
Power measurements in delay start shall commence at the earliest 20 min after the moment
the delay start is activated and shall continue for at least 10 min; therefore, the delay start
setting shall cover at least 30 min.
Annex B – Addresses of suppliers
B.3 Food mixer
Replace Clause B.3 with the following new text and tables:
Clause B.3 describes an appropriate food mixer for the dough for the small cakes specified in
9.2.2. and for the fatless sponge cake specified in 9.3.1. Mixing times and levels are determined
for the Bosch MUM2 series, for example Bosch MUMS2ER01 or MUMS2EW00 and indicated
in Table B.2 and Table B.3.
Specification of an appropriate food mixer:
– power rating: (700 ± 50) W
– wire balloon whisk
– bowl, 3,8 l, top diameter (23 ± 2) cm
– revolutions per minute with the wire balloon whisk:
-1
• level 1: (86 ± 8) min
-1
• level 2: (150 ± 8) min
-1
• level 3: (298 ± 8) min
-1
• level 4: (490 ± 10) min
The food mixer should be able to beat sugar and butter to a soft and pale mixture within 5 min.
___________
Bosch MUMS2ER01 or MUMS2EW00 are trade names of products supplied by Bosch. This information is given
for the convenience of the 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.

– 8 – IEC 60350-1:2023/AMD1:2025
© IEC 2025
Table B.2 – Mixing times and settings for small cakes (9.2.2)
Steps Mixing time in min Setting
Beat together butter and 5 Start at level 2, and then gradually increase to level 4 in
sugar less than 1 min.
After half of mixing time, loosen the mixture from the bowl.
Add egg mixture 2,5 Start with level 3, and then switch up to level 4.
After half of mixing time, loosen the mixture from the bowl.
Fold in flour, baking 1 After stirring at level 2, gradually increase to level 4.
powder and salt
After half of mixing time, loosen the mixture from the bowl.
The mixing times are values for an indication.

Table B.3 – Mixing times and settings for Fatless sponge cake (9.3.1)
Steps Mixing time in min Setting
Beat together egg whites and 5 Level 4
water
Add sugar and egg yolk 2,5 Start at level 2, and then gradually increase to
level 4
After half of mixing time, loosen the mixture from
the bowl.
Fold in flour, corn starch and Manually – very gently.
baking powder
The mixing times are values for an indication.

Annex C – Description of the test brick
C.1 Specification
Replace the “Name” with the following new entry and footnote:
Name SkamoStove Test Brick
C.2 Supplier and order specification
Replace the first paragraph with the following:
Bricks are available under the type designation "SkamoStove Test Brick" from the following
supplier:
___________
SkamoStove Test Brick is the trade name of a product supplied by SKAMOL A/S. This information is given for
the convenience of users of this International Standard 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.

© IEC 2025
Annex G
Table G.1 – Step by step instruction for measuring low-power modes
Replace Table G.1 with the following new table (the 15 min waiting time has been replaced with 20 min waiting time):
Mode/ Step Appliance without Appliance with delay Appliance without delay Appliance with delay Measured Reference
Condition delay start and start and without start and with network start and network parameter
without network network standby standby standby
standby
1 Connect appliance to Connect appliance to Connect appliance to Connect appliance to 14.2.2
power supply power supply power supply power supply
* * * *
Wait at least 20 min Wait at least 20 min Wait at least 20 min Wait at least 20 min
3 Measure power Measure power Measure power Measure power Standby mode P
s
consumption consumption consumption consumption
or Off mode P
o
4 Turn on appliance Turn on appliance Turn on appliance Turn on appliance 14.2.2
14.2.3
optional Complete (any) cycle Complete (any) cycle Complete (any) cycle e Complete (any) cycle Describe in test
report
5 Cool down to ambient Cool down to ambient Cool down to ambient Cool down to ambient
temperature temperature temperature temperature
** ** ** **
6 Describe in test
Appliance interaction Appliance interaction Appliance interaction Appliance interaction
report
* * * *
Wait at least 20 min Wait at least 20 min Wait at least 20 min Wait at least 20 min
8 Measure power Measure power Measure power Measure power Standby mode P
s
consumption consumption consumption consumption
or Off mode P
o
9 - - Turn on appliance if it is Turn on appliance if it is 14.2.4
not already turned on not already turned on
10 - - Activate network Activate network
connection connection
optional - - Complete (any) cycle Complete (any) cycle Describe in test
report
11 - - Cool down to ambient Cool down to ambient
temperature temperature
* *
12 - -
Wait at least 20 min Wait at least 20 min

Standby and off mode
Connected to network (if Not connected to network (deactivate network
available) connection if activated)

– 10 – IEC 60350-1:2023/AMD1:2025
© IEC 2025
Mode/ Step Appliance without Appliance with delay Appliance without delay Appliance with delay Measured Reference
Condition delay start and start and without start and with network start and network parameter
without network network standby standby standby
standby
13 - - Measure power Measure power Network standby
P
consumption consumption
n
14 - - Turn off appliance if it is Turn off appliance if it is
not already off not already off
15 - Turn on appliance - Turn on appliance 14.2.5
16 - - Activate network
connection if deactivated
17 - Activate delay start - Activate delay start Describe in test
report
18 - Wait at least 20 min* - Wait at least 20 min*
19 - Measure power - Measure power Delay start P
d
consumption consumption
* Opening or closing the door by the operator can reactivate the appliance to perform auxiliary functions such as display information or interior light. If an action occurs, 15 min
waiting time is needed for the appliance to revert to off mode or standby mode or standby mode in condition of networked standby. The measurement shall be done with closed
door.
** Appliance interactions can be
– switch on the appliance;
– end of active mode and associated activities;
– cooling phase after completion of the active mode;
– or any interaction if no other mode is triggered.

Delay start mode
Connected to network (if
available)
© IEC 2025
Add the following new Annex H:
Annex H
(normative)
Measuring energy consumption of the heating function and eco function
in combination microwave ovens
H.1 Purpose
Annex H specifies the modifications requested to apply this document to a combination
microwave oven with turntable.
Only the performance criteria related to the heating function and eco function are considered.
Performance criteria related to microwave function or combination microwave function are
described in IEC 60705.
H.2 Dimensions and mass
For combination microwave ovens with turntable the measurement of the internal dimensions
and the volume shall be done as specified in IEC 60705:2024, 7.2.
H.3 Preheating and accuracy – test setup (see 7.2)
The air temperature in the empty combination microwave oven with turntable is measured
with a thermocouple according to 5.3 fixed to a grid or to the ceiling. It shall be ensured that
the welding point of the thermocouple is located at the centre of the calculated volume of the
combination microwave oven with a distance of at least 30 mm from any metal part.
If a grid is used for fixation, this grid shall be made of wire. It shall be placed above the turntable
in such a way that the turntable can rotate unhindered.
The thermocouple is led through the door gap in a way that the door is completely closed without
applying additional force. If the appliance is prepared with the thermocouples, do not operate it
with a function combined with microwave energy (see Annex D).
H.4 Energy consumption and time for heating a load (see Clause 8)
H.4.1 General
Combination microwave ovens without turntable are measured in accordance with Clause 8.
For combination microwave ovens with turntable, where the food rotates during the operation
of the heating function and eco function, the requirements and calculations specified in
Clause 8 shall be applied taking into account the modifications in Annex H.
For combination microwave ovens with turntable, where the food does not rotate during the
operation of the heating function and eco function, the requirements and calculations
specified in Clause 8 shall be applied taking into account H.4.3.1 regarding the positioning of
the brick.
EXAMPLE Appliances in which the turntable can be optionally switched off or in which a stationary grid can be
inserted in side racks above the turntable.

– 12 – IEC 60350-1:2023/AMD1:2025
© IEC 2025
If the combination microwave oven is equipped with a turntable that can optionally be
switched off by the user during operation, both options are measured - with the turntable rotating
in accordance with Annex H and with the turntable switched off in accordance with Clause 8.
H.4.2 Test load
A brick as specified in Annex C shall be used. The modification concerns the hole for the data
loggers. Instead of the thermocouples, two core drillings are necessary to accommodate two
data loggers as specified in Figure H.1.
The centre of the data logger shall be in the middle of the height of the brick.
Dimensions in millimetres
Figure H.1 – Position of data loggers
The diameter of the hole shall be the same of the data logger chosen for the measurement plus
an additional gap of 0,1 mm to 0,2 mm to ensure a smooth mounting and removal.The holes
shall be closed with a stamp. The stamp shall be made of brick (see Annex C) and have a
cylindrical shape with the same diameter as the data logger, and a height calculated to ensure
the same mass removed from the brick when drilling the hole plus 5 mm. Apply pressure to the
stamp after mounting of the data logger to ensure thermal contact.
The test setup shall ensure the thermal contact between brick and stamp.
The data logger accommodated into these holes shall comply with the following:
– dimensions: height < 6,5 mm; diameter < 20 mm;
– cylindrical with plain surface on top and bottom for a full surface contact;
– material: metal;
– maximum permissible error: ± 0,5 K;
– resolution: ≤ 0,1 K;
– sampling rate: 1/s.
© IEC 2025
In accordance with Table 2, the sampling rate of the data logger shall be ≥ 1/s. If the data
storage capacity of the data logger is exceeded due to a long test duration, the sampling rate
is decreased to ≥ 0,5/s.
NOTE A possible supplier for this data logger is the ibutton DS 1922L-F5 and DS 1922T-F5 . An example for the
test setup with this data logger is shown in Annex I.
All further preparation of the brick follows 8.3, noting that the soaking shall be done with the
stamps fitted and with the data logger removed.
To ensure an aligned initial temperature for all components, the data logger shall be inserted
in the brick before starting the measurement, and then the brick shall be cooled with the data
logger for another (15 ± 2) min in the cold water. Remove the brick from the water; flip the brick
carefully two times to allow any excess water to be drained.
To insert and remove the data logger to the holes a vacuum pipette can be helpful.
H.4.3 Measurement and positioning the brick
H.4.3.1 Positioning the brick
Remove all accessories delivered with the appliance such as baking sheets and side racks not
used for placing the brick.
Place the brick prepared according to H.4.2 with the stamps on the upper side.
For combination microwave ovens with a turntable for which no grid is supplied, the turntable
is regarded as a food support and the brick is centered directly on the turntable.
If a grid is supplied and recommended in the instructions for use for applications operated with
thermal heat, the brick is centered on this grid. The grid is inserted into the appliance in
accordance with the instructions of use whereby the brick shall be as close to the centre of the
cavity as possible. Only if the grid is already placed on the lowest level, the centre of the brick
may be higher than the centre of the cavity.
H.4.3.2 Measurement
– If the brick positioned in the combination microwave oven is rotating, the measurement of
Clause 8 shall be adapted by the requirements specified in Annex H.
– If the appliance is prepared with the thermocouples for measuring the observer temperature,
do not operate it with a function combined with microwave energy. Out-coupled microwave
power through the thermocouples can damage instruments.
– Start the measurement within 3 min from the removal of the brick from the refrigerator by
switching on the appliance following the requirements for setting.
– Operate the combination microwave oven as long as a temperature rise of ≥ 55 K was
reached.
NOTE 1 A temperature rise of ≥ 55 K is usually reached in 1 h.
– After finishing the measurement, read out the data logger and determine the energy
consumption(s) E in kWh and the time(s) t in min and s, when the last of the two data
k k
loggers in the brick reaches a temperature rise of 54 K, k = 1, 2 and 3. If this value was not
reached, the test shall be repeated with extended time.
___________
ibutton (https://www.ibuttonlink.com/products/ds1922t) is an example of a suitable product available
commercially. This information is given for the convenience of the users of this document and does not constitute
an endorsement by IEC of the product named. Equivalent products can be used if they can be shown to lead to
the same results.
– 14 – IEC 60350-1:2023/AMD1:2025
© IEC 2025
– The temperature offset to a temperature rise of 54 K, when data loggers are used, versus
55 K, when thermocouples are used, is empirically determined and only valid for a data
logger with a thermal half-life of 15 s to 25 s.
NOTE 2 The procedure to determine the thermal half-life of a data logger is described in Annex J.
The following data are measured:
• the measured energy consumption(s) E in kWh and the time(s) t in min and s, when the
k k
last of the two data loggers in the brick reaches a temperature rise of 54 K, k = 1, 2 and 3;
• centre temperatures of the brick in °C;
• T continuously measured by the observer thermocouple in °C;
o1,k
• ambient temperature T from the beginning of the test (when the appliance is switched
a1, k
on) to the end of the test, i.e. when the last of the two data loggers in the brick has reached
54 K temperature rise in °C.
Phase 2 (see 8.4.4) shall be measured without any modification.
H.4.4 Calculation
The calculation shall be made in accordance with 8.5.
H.4.5 Acceptance verification of the test results
For acceptance verification, the criteria stated in 8.6 shall be applied.
H.4.6 Final electric energy consumption
The final energy consumption is calculated in accordance with 8.7.
H.4.7 Reporting of test results
Data shall be reported in accordance with 8.9.

© IEC 2025
Add the following new Annex I:
Annex I
(informative)
Test setup – Measuring energy consumption for the heating function and
eco function of combination microwave ovens
Annex I shows the specific test setup when the ibutton is used, such as DS 1922L-F5 and
DS 1922T-F5; as shown in the Figure I.1 where the specified dimensions are fixed for these
ibuttons. If another data logger is used, it is possible that the dimensions will have to be adjusted
according to the requirements in H.4.2. Figure I.2 shows the brick when data logger and stamps
are mounted.
Dimensions in millimetres
Figure I.1 – Test setup – ibutton mounted to the hole in the brick
and dimensions of the stamp
Figure I.2 – Assembled view
– 16 – IEC 60350-1:2023/AMD1:2025
© IEC 2025
Add the following new Annex J:
Annex J
(informative)
Determining the thermal half-life of a data logger
To verify if any data logger is suitable for the measurement in accordance with Annex H the
thermal half-life can be determined. The thermal half-life is defined as the time it takes for the
data logger to adjust to half of the temperature difference when the data logger is put from a
glass beaker filled with water at a temperature T (high temperature) to a glass beaker with T
h l
(low temperature).
EXAMPLE
T = 76 °C and T = 0 °C
h l
Λ = 20 s, i.e. the data logger measures 38 °C after 20 s. See Figure J.1.
This value describes at which rate the data logger adapts to a temperature change. This so-called thermal half-life
in the range of 15 s to 25 s is a criterion for the validity of the 1 K offset regarding the core temperature rise in the
brick.
Key
dots ibutton measurement
line curve fit with: λ = 20 s, t > 0 s
Tt()=T+ (T−⋅T )
l hl
t
λ
NOTE The graph shows the temperature adjustment after the ibutton was transferred from a beaker filled with hot
water to a beaker filled with cold water at t = 0.
Figure J.1 – Example ibutton – temperature adjustment

© IEC 2025
Add the following new Annex K:
Annex K
(informative)
Uncertainty of measurement
Following IEC TR 63250, the below mentioned expanded uncertainties for measurements
specified in 6.2 and Clause 8 were evaluated.
Expanded uncertainties have been assessed based on the 2023 oven round-robin test (RRT),
where 19 laboratories from Europe have participated. One of the objectives of the RRT was to
verify the robustness and precision of the new defined method for energy consumption
measurement.
In this round-robin test three types of household ovens were measured concerning their internal
cavity volume and energy consumption.
In a second round-robin test, for one combination microwave oven the heating functions were
measured applying the method for energy consumption measurement with the data logger
specified in Annex H. In this round- robin test 7 laboratories from Europe have participated.
Calculations of repeatability and reproducibility per measure were performed excluding
statistically identified outliers. Reproducibility values were used to calculate expanded
uncertainties, which are expressed as relative and/or absolute values, see Table K.1.
a
Table K.1 – Relative and absolute expanded uncertainty (k = 2)
Measured parameter in Relative expanded Absolute expanded
uncertainty of measured uncertainty of measured
value value
Energy consumption E , heating function
∆T0
5 % 0,04 kWh
(measured in accordance with Clause 8
and with Annex H)
Energy consumption E , eco function
∆T0
8 % 0,05 kWh
(measured in accordance with Clause 8)
3 L
Calculated volume 6 %
a
The expanded uncertainty only describes the uncertainty of the measuring method while the variance of the
product is not included.
As long as the relative expanded uncertainty values cover unavoidable variations of measured
consumption values due to tolerances in test conditions given by the standard (e.g. ambient
conditions, temperature of water for testing, etc.), the approach of applying percentage values
is appropriate. With increasing energy and water efficiency of tested appliances measured
consumption values are decreasing and therefore the application of absolute expanded
uncertainty can be more suitable to cover the allowed variations in test conditions. Thus, a
representation of expanded uncertainties either in relative or in absolute values or as a
combination of both were considered following the analysis of the RRT test results.

– 18 – IEC 60350-1:2023/AMD1:2025
© IEC 2025
The following expanded uncertainties were found to best represent the allowed variation of the
test conditions in the standard:
– Expanded uncertainty for the energy consumption of a heating function (measured in
accordance with Clause 8 and with Annex H): 0,04 kWh for an energy
consumption < 0,8 kWh and 5 % for an energy consumption ≥ 0,8 kWh.
– Expanded uncertainty for the energy consumption of an eco function (measured in
accordance with Clause 8): 0,05 kWh for an energy consumption < 0,65 kWh and 8 % for
an energy consumption ≥ 0,65 kWh.
– Expanded uncertainty for the calculated volume: 3 l for a volume < 50 l and 6 % for a
volume ≥ 50 l.
© IEC 2025
Bibliography
Add the following new reference:
IEC TR 63250, Household and similar electrical appliances – Method of measuring performance
– Assessment of repeatability, reproducibility and uncertainty

___________
– 20 – IEC 60350-1:2023/AMD1:2025
© IEC 2025
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
APPAREILS DE CUISSON ÉLECTRODOMESTIQUES –

Partie 1: Cuisinières, fours, fours à vapeur et grils –
Méthodes de mesure de l'aptitude à la fonction

AMENDEMENT 1
AVANT-PROPOS
1) La Commission Électrotechnique Internationale (IEC) est une organisation mondiale de normalisation composée
de l'ensemble des comités électrotechniques nationaux (Comités nationaux de l’IEC). L’IEC a pour objet de
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conditions fixées par accord entre les deux organisations.
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L'IEC ne saurait être tenue pour responsable de ne pas avoir identifié de tels droits de brevets.
L’Amendement 1 de l’IEC 60350-1:2023 a été établi par le sous-comité 59K: Aptitude à la
fonction des appareils électrodomestiques et similaires de cuisson électrique, du comité
d’études 59 de l’IEC: Aptitude à la fonction des appareils électrodomestiques et analogues.

© IEC 2025
Le texte de cet Amendement est issu des documents suivants:
Projet Rapport de vote
59K/410/FDIS 59K/412/RVD
Le rapport de vote indiqué dans le tableau ci-dessus donne toute information sur le vote ayant
abouti à son approbation.
La langue employée pour l'élaboration de cet Amendement est l'anglais.
Ce document a été rédigé selon les Directives ISO/IEC, Partie 2, il a été développé selon les
Directives ISO/IEC, Partie 1 et les Directives ISO/IEC, Supplément IEC, disponibles sous
www.iec.ch/members_experts/refdocs. Les principaux types de documents développés par
l'IEC sont décrits plus en détail sous www.iec.ch/publications/.
Le comité a décidé que le contenu de ce document ne sera pas modifié avant la date de stabilité
indiquée sur le site web de l’IEC sous webstore.iec.ch dans les données relatives au document
recherché. À cette date, le document sera
• reconduit,
• supprimé, ou
• révisé.
___________
...