SIST EN 50640:2018
(Main)Household and similar electric appliances - Methods for measuring the performance of clothes washing machines intended for commercial use
Household and similar electric appliances - Methods for measuring the performance of clothes washing machines intended for commercial use
This European standard deals with the performance of clothes washing machines intended to be used by trained users e.g. in hotels, hospitals, factories, in light industry and on farms. It also covers washing machines declared for commercial use in public areas and operated by lay persons e.g. in launderettes, apartment houses and communal laundry rooms. The clothes washing machines can be utilizing cold and/or hot water supply and without heating or with heating devices for electricity, steam or gas. It also deals with appliances for both washing and drying textiles (washer-dryers) with respect to their washing related functions and to separate spin extractors related to their dewatering capabilities. This European standard covers top, front and side loaded clothes washing machines with horizontal or vertical axis and with one or more wash compartments.
NOTE 1 Performance of tumble dryers declared for commercial use is assessed in CLC/PrEN XXXXX.
NOTE 2 The object is to state and define the principal performance characteristics of clothes washing machines declared for commercial use and to describe the test methods for measuring these characteristics.
NOTE 3 This European standard does not apply to continuous batch washing machines (e.g. tunnel washers) or washing machines only possible to operate with automatic loading and unloading.
NOTE 4 This European standard does not specify safety requirements for clothes washing machines declared for commercial use. Safety requirements are specified in EN 50571 and the EN ISO 10472 series.
Waschmaschinen für den gewerblichen Gebrauch - Verfahren zur Messung der Gebrauchseigenschaften
Appareils électrodomestiques et analogues - Méthodes de mesure de l'aptitude à la fonction pour les machines à laver le linge à usage commercial
La présente Norme européenne porte sur l’aptitude à la fonction des machines à laver le linge destinées à être employées par des utilisateurs formés (dans des hôtels, des hôpitaux, des usines, dans l'industrie légère et dans des exploitations agricoles, par exemple). Elle couvre également les machines à laver déclarées pour un usage commercial dans des zones publiques et manipulées par des personnes non expertes (dans des laveries automatiques, des immeubles collectifs d'habitation et des buanderies communales, par exemple). Les machines à laver le linge peuvent être alimentées en eau froide et/ou en eau chaude, et sans chauffage ou avec des dispositifs de chauffage à l'électricité, à la vapeur ou au gaz. La présente Norme européenne couvre les machines à laver le linge à chargement par le haut, l'avant ou le côté à axe horizontal ou vertical et à un ou plusieurs compartiments de lavage. Elle porte également sur les appareils de lavage et de séchage des textiles (laveuses-sécheuses) en fonction de leurs capacités de lavage, et sur les essoreuses centrifuges séparées en fonction de leurs capacités d'essorage.
NOTE 1 L'aptitude à la fonction des sèche-linge déclarés pour un usage commercial est évaluée dans l’EN 50594.
NOTE 2 La présente norme a pour objet d'énumérer et de définir les principales caractéristiques d'aptitude à la fonction des machines à laver le linge déclarées pour un usage commercial, et de décrire les méthodes d'essai pour mesurer ces caractéristiques.
NOTE 3 La présente Norme européenne ne s'applique pas aux machines à laver pour le traitement en continu des textiles (tunnels de lavage, par exemple) ni aux machines à laver à chargement et déchargement automatiques uniquement.
NOTE 4 La présente Norme européenne ne spécifie aucune exigence de sécurité pour les machines à laver le linge à usage commercial. Les exigences de sécurité sont spécifiées dans les séries EN 50571 et EN ISO 10472.
Gospodinjski stroji in podobne električne naprave - Metode za merjenje lastnosti pralnih strojev za komercialno uporabo
Ta evropski standard obravnava delovanje pralnih strojev, ki so namenjeni usposobljenim uporabnikom, npr. v hotelih, bolnišnicah, tovarnah, lahki industriji in na kmetijah. Obravnava tudi pralne stroje za komercialno uporabo na javnih mestih, ki jih upravljajo nestrokovne osebe, npr. v samopostrežnih pralnicah, stanovanjskih hišah in skupnih javnih pralnicah. Pralni stroji lahko uporabljajo vir oskrbe z mrzlo in/ali vročo vodo z grelnimi napravami, ki delujejo na električno energijo, paro ali plin, ali brez njih. Obravnava tudi naprave za pranje in sušenje tekstilnih izdelkov (pralno-sušilni stroji) glede na njihove funkcije, povezane s pranjem, in ločevanje centrifug, povezanih z njihovimi sposobnostmi odstranjevanja vode. Ta evropski standard obravnava pralne stroje z zgornjim, sprednjim in stranskim polnjenjem ter vodoravno ali navpično osjo in enim ali več razdelkov v predalu za pralna sredstva.
OPOMBA 1: Delovanje sušilnih strojev za komercialno uporabo je ocenjeno v standardu CLC/PrEN XXXXX.
OPOMBA 2: Namen tega standarda je navesti in opredeliti glavne lastnosti delovanja pralnih strojev za komercialno uporabo ter opisati preskusne metode za merjenje teh lastnosti.
OPOMBA 3: Ta evropski standard se ne uporablja za pralne stroje z neprekinjenim delovanjem (npr. tunelski pralni stroji) ali pralne stroje, ki lahko delujejo le s samodejnim polnjenjem in praznjenjem.
OPOMBA 4: Ta evropski standard ne določa varnostnih zahtev za pralne stroje, namenjene za komercialno uporabo. Varnostne zahteve so določene v standardu EN 50571 in skupini standardov EN ISO 10472.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 50640:2018
01-oktober-2018
1DGRPHãþD
SIST-TS CLC/TS 50640:2015
*RVSRGLQMVNLVWURMLLQSRGREQHHOHNWULþQHQDSUDYH0HWRGH]DPHUMHQMHODVWQRVWL
SUDOQLKVWURMHY]DNRPHUFLDOQRXSRUDER
Household and similar electric appliances - Methods for measuring the performance of
clothes washing machines intended for commercial use
Waschmaschinen für den gewerblichen Gebrauch - Verfahren zur Messung der
Gebrauchseigenschaften
Ta slovenski standard je istoveten z: EN 50640:2018
ICS:
97.060 Aparati za nego perila Laundry appliances
SIST EN 50640:2018 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 50640:2018
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SIST EN 50640:2018
EUROPEAN STANDARD
EN 50640
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2018
ICS 97.060 Supersedes CLC/TS 50640:2015
English Version
Household and similar electric appliances - Methods for
measuring the performance of clothes washing machines
intended for commercial use
Waschmaschinen für den gewerblichen Gebrauch -
Appareils électrodomestiques et analogues - Méthodes de
Verfahren zur Messung der Gebrauchseigenschaften
mesure de l'aptitude à la fonction pour les machines à laver
le linge à usage commercial
This European Standard was approved by CENELEC on 2018-04-23. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50640:2018 E
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EN 50640:2018 (E)
Contents Page
European foreword .4
1 Scope .5
2 Normative references .5
3 Terms, definitions and symbols .5
3.1 Terms and definitions .5
3.2 Symbols .9
4 Requirements . 10
4.1 General . 10
4.2 Rated Capacity . 11
4.3 Dimensions . 11
5 Test conditions, materials, equipment and instrumentation . 12
5.1 General . 12
5.2 Reference machine . 12
5.3 Ambient conditions. 12
5.4 Test materials . 14
5.5 Equipment . 16
5.6 Instrumentation and accuracy . 18
6 Preparation for testing . 19
6.1 General . 19
6.2 Test washing machine and reference machine preparation . 19
6.3 Detergent . 20
6.4 Test loads . 22
7 Performance measurements – general requirements . 27
8 Tests for performance . 28
8.1 General . 28
8.2 Test procedure for performance tests . 28
8.3 Measurements to determine washing performance . 30
8.4 Measurements to determine maximum spin speed . 31
8.5 Measurements to determine water extraction performance . 31
8.6 Measurement to determine the bath temperature . 32
8.7 Measurements to determine water and energy consumption and cycle time . 32
9 Assessment of performance . 33
9.1 General . 33
9.2 Evaluation of washing performance . 33
9.3 Evaluation of water extraction performance . 35
9.4 Evaluation of water and energy consumption and cycle time . 36
10 Data to be reported . 38
Annex A (normative) Specification of stain test strip EN/IEC-60456 . 39
Annex B (normative) Standard detergent — IEC Standard Powder Detergent 2016 (IEC-
P) . 44
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Annex C (normative) Specifications for base load — Cotton/synthetics blends base
load EN 50640 – small sheet and large sheet . 46
Annex D (normative) Reference machine — Specification of the reference washing
machines and method of use . 48
Annex E (normative) Reference machine programme definitions . 51
Annex F (normative) The bone-dry method of conditioning . 54
Annex G (normative) Folding and loading the test load . 56
Annex H (normative) Measuring the wash temperature . 67
Annex I (normative) Performance testing of gas fired washing machines . 69
Annex J (normative) Performance testing of steam heated washing machines . 72
Annex K (normative) Procedure to determine test load size when rated capacity is not
declared . 82
Annex L (normative) Test procedure for a performance test of a cotton 60 programme
with full load at standard rating conditions . 86
Annex M (informative) Uncertainty of measurements in the present document . 98
Annex N (normative) Test report – Data to be reported . 101
Annex O (informative) Reporting of key parameters . 109
Bibliography . 111
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EN 50640:2018 (E)
European foreword
This document (EN 50640:2018) has been prepared by CLC/TC 59X “Performance of household and
similar electrical appliances”.
The following dates are fixed:
• latest date by which this document has (dop) 2019-04-23
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2021-04-23
standards conflicting with this document
have to be withdrawn
This document supersedes CLC/TS 50640:2015.
This European Standard is a new standard, but it is based on portions from EN 60456:2011.
The procedures described in this European Standard are modified substantially compared to the
procedures described in EN 60456. Therefore results of tests according to this European Standard
cannot and are bound not to be compared to results of similar procedures of EN 60456.
Significant technical differences from EN 60456 are:
a) the method includes procedures for measuring steam heated and gas heated washing
machines;
b) the introduction of a new type of base load;
c) a new reference programme;
d) a new formulation of the standard detergent.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association.
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1 Scope
This European Standard deals with the performance of clothes washing machines intended to be
used by trained users e.g. in hotels, hospitals, factories, in light industry and on farms. It also covers
washing machines declared for commercial use in public areas and operated by lay persons e.g. in
launderettes, apartment houses and communal laundry rooms. The clothes washing machines can
be utilizing cold and/or hot water supply and without heating or with heating devices for electricity,
steam or gas. This European Standard covers top, front and side loaded clothes washing machines
with horizontal or vertical axis and with one or more wash compartments. It also deals with appliances
for both washing and drying textiles (washer-dryers) with respect to their washing related functions
and to separate spin extractors related to their dewatering capabilities.
NOTE 1 Performance of tumble dryers declared for commercial use is assessed in EN 50594.
NOTE 2 The object is to state and define the principal performance characteristics of clothes washing
machines declared for commercial use and to describe the test methods for measuring these characteristics.
NOTE 3 This European Standard does not apply to continuous batch washing machines (e.g. tunnel
washers) or washing machines only possible to operate with automatic loading and unloading.
NOTE 4 This European Standard does not specify safety requirements for clothes washing machines
declared for commercial use. Safety requirements are specified in EN 50571 and the EN ISO 10472- series.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
EN 437:2003+A1:2009, Test gases — Test pressures — Appliance categories
CEN/TR 1749:2014, European scheme for the classification of gas appliances according to the
method of evacuation of the combustion products (types)
EN 12953-10, Shell boilers — Part 10: Requirements for feedwater and boiler water quality
EN 50571, Household and similar electrical appliances — Safety — Particular requirements for
commercial electric washing machines
EN 60456, Clothes washing machines for household use — Methods for measuring the performance
(IEC 60456)
EN 60734, Household electrical appliances — Performance — Water for testing (IEC 60734)
EN ISO 80000-1:2013, Quantities and units — Part 1: General (ISO 80000-1:2009 + Cor 1:2011)
IAPWS-IF97, IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and
Steam [International Association for the Properties of Water and Steam]
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
•IEC Electropedia: available at http://www.electropedia.org/
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•ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
washing machine
appliance for cleaning and rinsing of textiles using water which may also have a means of extracting
excess water from the textiles
3.1.2
test washing machine
washing machine that is subjected to part or all of the requirements in this European Standard in
order to determine its performance
Note 1 to entry:Test washing machine can include washing machines according to 3.1.6, 3.1.7.
3.1.3
reference machine
specially constructed washing machine of known performance which is used to increase repeatability
and reproducibility of results
Note 1 to entry:It can be used to provide a known performance level within a laboratory against which to compare
selected performance parameters on test washing machines as defined in this European Standard – refer to
5.5.2.
3.1.4
washer-dryer
washing machine which includes means for drying the textiles, usually by heating and tumbling
Note 1 to entry:This European Standard only covers the operations which relate to the washing machine
function – see Clause 1.
3.1.5
spin extractor
separate water-extracting appliance in which water is removed from textiles by centrifugal action (spin
extraction)
3.1.6
horizontal axis washing machine
washing machine in which the load is placed in a drum which rotates around an axis with an angle
less than 45° to horizontal
Note 1 to entry:The classification of vertical axis or horizontal axis in this European Standard is only used to
define the placement of the load into the drum.
3.1.7
vertical axis washing machine
washing machine in which the load is placed in a drum which rotates around an axis which rotates
with an angle of 45° or more related to horizontal
Note 1 to entry:The classification of vertical axis or horizontal axis in this European Standard is only used to
define the placement of the load into the drum.
3.1.8
automatic machine
washing machine where the load is fully treated by the machine without the need for user
intervention at any point during the cycle prior to its completion
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3.1.9
top loaded machine
washing machine where the load is placed in the wash compartment from the top, and which may be
of a horizontal or vertical axis type
3.1.10
side loaded machine
washing machine where the load is placed in the wash compartment from the side, and which is of a
horizontal axis type
3.1.11
pullman machine
washing machine where the wash compartment is divided in two compartments
3.1.12
Y-pocket machine
washing machine where the wash compartment is divided in three compartments
3.1.13
test run
single performance assessment as specified in Clause 8 of this European Standard
3.1.14
test series
group of test runs on a test washing machine which, collectively, are used to assess the
performance of a washing machine
3.1.15
operation
each performance of a function that occurs during the washing machine programme such as pre-
wash, washing, rinsing, draining or spinning
3.1.16
programme
series of operations which are pre-defined within the washing machine and which are declared by
the manufacturer as suitable for washing certain textile types
3.1.17
cycle
complete washing process until the load is accessible to the user, as defined by the programme
selected, consisting of a series of operations (wash, rinse, spin, etc.)
3.1.18
spin extraction
water-extracting function by which water is removed from textiles by centrifugal action, which is
included as a function (built in operation) of an automatic washing machine but may also be
performed in a spin extractor
3.1.19
spin speed
rotational frequency of a drum during spin extraction
Note 1 to entry:A method for determination of spin speed is not defined in this European Standard.
3.1.20
base load
unsoiled textiles used for testing
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3.1.21
test load
base load used for testing plus stain test strips
3.1.22
test load mass
actual mass of the base load including stain test strips
3.1.23
nominal test load mass
mass of dry textiles of a particular type for which the performance of the test washing machine shall
be tested (rated capacity or part load)
Note 1 to entry:Target value for the conditioned test load mass.
3.1.24
rated capacity
maximum mass in kilograms of dry textiles of a particular type which the manufacturer declares can be
treated in the washing machine on the selected programme
3.1.25
end of cycle
when the load is accessible to the user and next programme can be started
3.1.26
cycle time
time from the initiation of the programme (excluding any user programmed delay) until the end of
cycle
3.1.27
main wash duration
time from the commencement of the initial water intake for the main wash until the commencement of
the initial water intake for the first rinse
Note 1 to entry:Variations in the laboratory water supply pressure can affect the main wash duration. This
definition is only applicable to test washing machines. The reference machine wash time used for calibration of
the reference machine is defined differently. Refer to Table E.1.
3.1.28
remaining moisture content
measure of the additional amount of moisture that is contained in the base load in relation to the
equilibrium condition for base load items which have been conditioned in a controlled space (refer to
6.4.5.2)
Note 1 to entry:This equilibrium condition is defined as 0 % remaining moisture content in this European
Standard. Hence it is possible for a base load or load items to have a negative remaining moisture content
when treated with a tumble drier. Refer also to Annex F.
3.1.29
rated voltage
voltage assigned to the appliance by the manufacturer
3.1.30
cycle energy
energy consumed during the cycle time in one test run
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3.1.31
programme time
time from the initiation of the programme (excluding any user programmed delay) until the load is
accessible
3.2 Symbols
3.2.1 Symbols relating to 9.2 – washing performance
C
the sum of the average reflectance values (Y-values) for each test run
k
the average sum of the reflectance values (Y-values) for each of the five types of soils, for
C
all valid test runs
the sum of the reflectance values in each test run of the test washing machine
C
k
test
the average sum of the reflectance values of the test washing machine
C test
the average sum of the reflectance values in each test run of the reference machine
C
ref
m the number of soil types per stain test strip
n the number of stain test strips in each test run
p confidence interval for q
q
ratio between the test washing machine, C , and the reference machine, C
test ref
standard deviation of the ratio q
s
q
the standard deviation of C
s
k
C
s the standard deviation of the reflectance values for each soil type within a given test run
i
the “Student T” factor for (w-1) degrees of freedom for a confidence of 95 % (i.e. 2,776 for
t
w−1, 0,05
five test runs equals four degrees of freedom, two sided test)
w the number of test runs in the test series
the average reflectance values for each soil type
x
i
the average reflectance value of the 4 individual readings for each of the 5 soil types on a
x
ij
stain test strip
3.2.2 Symbols relating to 9.3 – water extraction (spinning)
RMC remaining moisture content
average remaining moisture content
RMC
M the mass of the conditioned base load (g)
M
the mass of base load at the end of the test run (g)
r
3.2.3 Symbols relating to 9.4 – energy, water and time
T
the measured average cold water inlet temperature (°C)
c
T the measured average hot water inlet temperature (°C)
h
V
the volume of the cold water used during an operation (l)
c
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V the volume of external hot water used during operation (l)
h
W the cold water energy correction for the operation (kWh)
c
W
the total cold water energy correction determined during the test (kWh)
ct
W the total electrical energy metered during the test (kWh)
et
W
the total gas energy metered during the operation (kWh)
gt
W the calculated hot water energy for the operation (kWh)
h
W the calculated total hot water energy determined during the test (kWh)
ht
W the total steam energy metered during the operation (kWh)
st
W
total energy (kWh)
total
3.2.4 Symbols relating to Annex F
M the mass of base load at the end of the bone dry run (g)
bd
3.2.5 Symbols relating to Annex G
M
the total test load mass (kg)
T
M the mass of a small sheet (kg)
S
M
the mass of a stain test strip (kg)
ST
M the mass of a small sheet with a stain test strip attached (kg)
S+ST
M the mass of a large sheet (kg)
L
X number of small sheets
S
X
number of small sheets with stain test strips attached
S+ST
X fixed number of small sheets
SF
X
additional number of small sheets
A
X number of large sheets
L
4 Requirements
4.1 General
This European Standard describes test methods for the measurement of the following performance
parameters:
— washing performance;
— rinsing performance (under consideration);
— water extraction performance;
— water consumption;
— energy consumption;
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— wash bath temperature;
— cycle time.
Any claims of performance referring to this European Standard for these parameters shall be
measured in accordance with the requirements of this European Standard (refer to Clause 8 for
details).
This European Standard does not specify minimum performance requirements for clothes washing
machines.
4.2 Rated Capacity
Either the manufacturer or supplier shall declare the rated capacity at 0,5 kg intervals.
NOTE For different textile types the rated capacity of a washing machine is usually different.
The rated capacity shall not exceed the maximum mass of dry laundry, in kilograms, to be used in the
test washing machine in accordance with EN 50571.
When the manufacturer or supplier gives a range of values for the rated capacity for a particular
textile type, the highest value shall be used.
Where information on the rated capacity is not available, the test load mass shall be determined
according to Annex K.
4.3 Dimensions
Where a manufacturer declares dimensions, these shall be in accordance with the following
requirements, as applicable. The dimensions shall be given in mm and shall be rounded up to the
nearest whole mm.
Height α = vertical dimension measured from the floor to a horizontal plane at the maximum
a
1/ 2
height of the washing machine, with the door/lid closed. If adjustable levelling
feet are provided, they shall be moved up and down to determine minimum (α )
1
and maximum (a ) possible heights.
2
= maximum vertical dimension measured from the floor to a horizontal plane at the
Height α a
3/ 4
maximum height of the washing machine with the door/lid open (generally when
at right angles to the machine top). If adjustable levelling feet are provided, they
shall be moved up and down to determine minimum (α ) and maximum (a )
3 4
possible heights.
Width b = horizontal dimension, between the sides, as measured between two parallel
1
vertical planes against the sides of the washing machine including all
projections.
Width b = horizontal dimension, between the sides, as measured between two parallel
2
including all
vertical planes against the sides of the washing machine
projections including an open side mounted door/lid.
Depth c = horizontal dimension as measured from a vertical rear plane against the back of
1
the washing machine and the most prominent part of the front fascia, with the
door/lid closed. For this measurement, the door thickness, knobs and handles
are generally not included in the measurement.
Depth c = horizontal dimension as measured from a vertical rear plane against the back of
2
the washing machine and the most prominent part of the front fascia, with the
door/lid closed. For this measurement, the door thickness, knobs and handles
are included in the measurement.
horizontal dimension as measured from a vertical rear plane against the washing
Depth c =
3
machine and the most prominent part of the front, knobs and handles also being
taken into account, with the door/lid open (generally when at right angles to the
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machine front).
Drum volume = the volume of a washing machine, where required, shall be determined in
accordance with Annex K.
NOTE 1 Dimension α
a is generally only applicable to top loaded washing machines while dimension c is
3/ 4 2
generally only applicable to front loaded washing machines.
NOTE 2 Width b is referring to washing machines with a loading door at the side of the machine.
2
NOTE 3 Dimension c is intended to provide an indication of the required depth for the washing machine
1
where the fascia is intended to be flush with adjacent furniture or appliances.
5 Test conditions, materials, equipment and instrumentation
5.1 General
The tolerances specified for parameters within this European Standard, using the symbol “±”, indicate
the allowable limits of variation from the specified parameter outside which the test or results shall be
invalid. The statement of tolerance does not permit the deliberate variation of these specified
parameters.
Rounding shall only be applied to reported values in Annex N. If numbers have to be rounded, they
shall be rounded to the nearest number according to EN ISO 80000-1:2013, B.3, Rule B. If the
rounding takes place to the right of the comma, the omitted places shall not be filled with zeros. If a
value to be reported is an intermediate required for use in the calculation of other values then rounding
shall only apply to the format of the intermediate in the report; the rounding shall not apply prior to its
use in subsequent calculations.
5.2 Reference machine
Unless otherwise specified, the reference machine shall be considered a test washing machine with
respect to conditions, materials and equipment specified.
5.3 Ambient conditions
5.3.1 Electricity supply
The supply volt
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