CLC/TS 50707:2020

SLOVENSKI STANDARD
01-julij-2020
Pralni in pralno-sušilni stroji za gospodinjsko in podobno uporabo - Metoda za
ugotavljanje temperature v perilu
Clothes washing machines and washer-dryers for household and similar use - Method
for the determination of temperature inside the laundry load
Waschmaschinen und Waschtrockner für den Hausgebrauch und ähnlichen Gebrauch -
Methode zur Bestimmung der Temperatur in der Wäschebeladung
Ta slovenski standard je istoveten z: CLC/TS 50707:2020
ICS:
97.060 Aparati za nego perila Laundry appliances
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL SPECIFICATION CLC/TS 50707

SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
May 2020
ICS 97.060
English Version
Clothes washing machines and washer-dryers for household and
similar use - Method for the determination of temperature inside
the laundry load
To be completed Waschmaschinen und Waschtrockner für den
Hausgebrauch und ähnlichen Gebrauch - Methode zur
Bestimmung der Temperatur in der Wäschebeladung
This Technical Specification was approved by CENELEC on 2020-04-13.

CENELEC members are required to announce the existence of this TS in the same way as for an EN and to make the TS available promptly
at national level in an appropriate form. It is permissible to keep conflicting national standards in force.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, 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
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. CLC/TS 50707:2020 E
Contents Page
European foreword .3
Introduction .4
1 Scope .5
2 Normative References .5
3 Terms, definitions and symbols .5
3.1 Terms and definitions .5
3.2 Symbols .5
4 Test conditions, materials, equipment and instrumentation .6
5 Preparation for testing .6
5.1 Preparation of equipment .6
5.2 Procedure .8
6 General test requirements . 10
7 Temperature test . 10
7.1 Data acquisition . 10
7.2 Validity of temperature data and test runs . 10
7.3 Expression of results . 11
8 Assessment of temperature . 11
8.1 Evaluation method to define the maximum temperature reached for 5 minutes inside
the base load . 11
9 Data to be reported . 12
Annex A (normative) Test report – Data to be recorded . 13
A.1 General . 13
A.2 Data for test washing machine or washer-dryer . 13
A.3 Data, parameters and results for the test series . 13
Bibliography . 15

European foreword
This document (CLC/TS 50707:2020) has been prepared by CLC/TC 59X, "Performance of household and
similar electrical appliances".
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.

Introduction
This document has been prepared by CLC/TC 59X, "Performance of household and similar electrical
appliances".
1 Scope
This document provides a measurement and evaluation method for the determination of the representative
maximum temperature reached inside the base load during the washing cycle of a washing machine or
washer-dryer.
The mean maximum temperature within the base load is measured with three temperature sensors, which
are attached to towels and/or pillowcases placed in different, representative locations inside the drum.
This document does not provide a method for measuring a temperature for the evaluation of hygiene
performance.
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 60456:2016/A11:— , Clothes washing machines for household use — Methods for measuring the
performance
EN IEC 62512:— , Electric clothes washer-dryers for household use — Methods for measuring the
performance
3 Terms, definitions and symbols
3.1 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.2 Symbols
test run
i
data logger number
k
total number of data loggers
m
total average maximum temperature for each treatment z (z = full, ½, ¼)
ϑ
max,z
average maximum temperature for the test run i with treatment z (z = full, ½, ¼)
ϑ
max,zi,
maximum temperature for the data logger k (k = 1, 2, 3) for test run i (i = 1, 2, 3, 4) for the
ϑ
max,zi, ,k
treatment z (z = full, ½, ¼)
Under preparation. Stage at the time of publication: EN 60456:2016/prAA:2019.
Under preparation. Stage at the time of publication: prEN IEC 62512:2019.

the x’th value out of the list of sorted temperatures is the maximum temperature
x
ϑ
max,zi, ,k
treatment
z
4 Test conditions, materials, equipment and instrumentation
The temperature inside the base load shall be measured with data loggers with the following specifications:
— Temperature range: at least (0 to 85) °C
NOTE 1 For tests involving continuous wash & dry programmes the device might need to withstand temperatures in
excess of 120 °C.
— Accuracy: ≤ 0,5 °C at 0 °C to 60 °C ; ≤ 2 °C above 60 °C
— Resolution: ≤ 0,2 °C
— Response time TC (10 to 90 %) in water: ≤ 2 min
— TC (10 % to 90 %) is the time it takes for the sensor to traverse between 10 % and 90 % of its final value.
Response time can also be expressed as a TC 63 % value. The 63 % figure is the time for the sensor to
reach 63 % of its final value. TC (10 % to 90 %) and the TC 63 % value are of approximately the same
magnitude for a given sensor.
— Sampling rate: ≤ 10 s
— Max mass: 30 g
— Dimensions: max 35 mm in each dimension
NOTE 2 Dimensions have been chosen to minimize mechanical impact on the base load. It is intended that the
addition of temperature loggers to the base load should not have a significant influence on the washing performance.
— Water protection class: IP67
5 Preparation for testing
5.1 Preparation of equipment
5.1.1 General
Data loggers shall be prepared for data acquisition according to the supplier’s instructions.
5.1.2 Attaching a data logger to a towel or a pillowcase
A data logger shall be attached to a base load item in the following way:
1. Place the data logger in the centre of a towel or pillowcase as pictured in Figure 1 and 2.
2. Fasten the towel or pillowcase around the data logger as pictured in Figure 3, 4 and 5. The fastening of
the data logger shall ensure that the data logger does not loosen during the test.

Figure 1 — Placing the data logger in the centre of a towel according to step 1

Figure 2 — Placing the data logger in the centre of a pillowcase according to step 1

Figure 3 — Fasten the towel around the data logger according to step 2

Figure 4 — Fasten the pillowcase around the data logger according to step 2

Figure 5 — Different examples for fastening of data logger to towels or pillowcases (close-ups)
5.2 Procedure
5.2.1 Number of data loggers
For each test run 3 data loggers shall be used, except in the case of a half load mass of 1,5 kg when only
two data loggers shall be used.
5.2.2 Placement of data loggers in the base load
To measure the temperature inside the base load during a wash cycle, the data loggers shall be attached to
towels and pillowcases as described in 5.1.2. The position of the towel or the pillowcase with the attached
logger is determined by the respective loading step according to Table H.2 of EN 60456:2016/A11:— in
case of full loads and quarter loads and according to Table ZA.2 to ZA.7 of EN 60456:2016/A11:— in case
of half loads.
5.2.3 Position and orientation of data loggers in full load and quarter load
The position of the data logger refers to the loading step as described in Annex H in EN 60456:2016/A11:—
.
In general one data logger shall be placed in a towel in step 2, one data logger shall be placed in a towel in
step 16 and one data logger shall be placed in a pillowcase in step 8.
Exceptions:
— If there is no towel in loading step 16 then the data logger shall be placed in a towel in loading step 29.
— If there is no pillowcase in step 8 then the data logger shall be placed in a pillowcase in step 1.

The towels equipped with a data logger placed in step 2 shall be arranged so that the data logger points to
the drum rear wall. If there are several towels in one step the towel closest to the centre shall be used. A
schematic representation of the position and orientation of the towels with attached data logger can be found
in Figure 6.
The towels equipped with a data logger placed in step 16 or step 29 shall be arranged so that the data logger
points to the drum opening. If there are several towels in one step the towel closest to the centre shall be
used. A schematic representation of the position and orientation of the towels with attached data logger can
be found in Figure 7.
The pillowcase equipped with a data logger placed in step 8 or step 1 shall be arranged so that the data
logger points to the right side of the drum. If there are several pillowcases in one step the pillowcase that
faces to the right side of the drum shall be used. A schematic representation of the position and orientation
of the pillowcases with attached data logger can be found in Figure 8 and Figure 9.
5.2.4 Position and orientation of data logger in half load
The Position of the data logger refers to the loading step as described in Annex ZA.2 to ZA.7 in
EN 60456:2016/A11:— .
In general one data logger shall be attached to a towel in step 2, one data logger shall be attached to a towel
in step 13 and one data logger shall be attached to a pillowcase in step 7. For a half load mass of 1,5 kg
only two data loggers shall be used, whereby one data logger shall be placed in a pillowcase in step 1 and
one data logger in pillowcase in step 25.
Exceptions:
— If there is no towel in step 13 then the data logger shall be placed in a towel in step 24.
— If there is no pillowcase in step 7 then the data logger shall be placed in a pillowcase in step 1.
The towels equipped with a data logger placed in step 2 shall be arranged so that the data logger points to
the drum rear wall. If there are several towels in one step the towel closest to the centre shall b
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