Electric dishwashers for household use - Methods for measuring the performance

This standard applies to electric dishwashers for household use that are supplied with hot and/or cold water. The object is to state and define the principal performance characteristics of electric dishwashers for household use and to describe the standard methods of measuring these characteristics. This standard is concerned neither with safety nor with performance requirements.

Elektrische Geschirrspüler für den Hausgebrauch - Messverfahren für Gebrauchseigenschaften

Lave-vaisselle électriques à usage domestique - Méthodes de mesure de l’aptitude à la fonction

La présente norme s'applique aux lave-vaisselle électriques à usage domestique alimentés en eau chaude et/ou froide. L'objet de la présente norme est d'établir et de définir les caractéristiques principales d'aptitude à la fonction des lave-vaisselle électriques à usage domestique et de décrire les méthodes normalisées de mesure de ces caractéristiques. La présente norme ne traite ni des exigences de sécurité ni de celles relatives à l'aptitude à la fonction.

Električni pomivalni stroji za gospodinjstva - Preskusne metode za merjenje lastnosti

Z mandatom 481 je Evropska komisija zadolžila odbor Cenelec, da preveri trenutne preskusne standarde in prepreči, da bi se jim uporabniki med preskusi za energetsko označevanje lahko izognili. Pomivalni stroj naj se z uporabo drugačnih senzorjev ne bi odzval na določen preskusni scenarij. Ker se pri preskušanju pranja uporablja umazano perilo, pri preskušanju sušenja pa ne, preskusna scenarija nista enaka.  Predlagane so bile različne rešitve, ki pa niso bile ustrezne. Končno je bilo določeno, da se preskusi ustreznost skupnega ocenjevanja pranja in sušenja (CCD).  Metoda se doda na novo oštevilčenemu standardu EN60436.

General Information

Status
Published
Publication Date
30-Jun-2016
Current Stage
6060 - Document made available
Due Date
01-Jul-2016
Completion Date
01-Jul-2016

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SLOVENSKI STANDARD
SIST EN 50242:2016
01-september-2016
1DGRPHãþD
SIST EN 50242:2008
SIST EN 50242:2008/A11:2012
(OHNWULþQLSRPLYDOQLVWURML]DJRVSRGLQMVWYD3UHVNXVQHPHWRGH]DPHUMHQMH
ODVWQRVWL

Electric dishwashers for household use - Test methods for measuring the performance

Lave-vaisselle électriques à usage domestique - Méthodes de mesure de l’aptitude à la

fonction
Ta slovenski standard je istoveten z: EN 50242:2016
ICS:
97.040.40 Pomivalni stroji Dishwashers
SIST EN 50242:2016 en,fr

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 50242:2016
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SIST EN 50242:2016
EUROPEAN STANDARD EN 50242
EN 60436
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2016
ICS 97.040.40 Supersedes EN 50242:2008
EN 60436:2008
English Version
Electric dishwashers for household use -
Methods for measuring the performance
(IEC 60436:2004 , modified + A1:2009 , modified
+ A2:2012 , modified)

Lave-vaisselle électriques à usage domestique - Elektrische Geschirrspüler für den Hausgebrauch -

Méthodes de mesure de l'aptitude à la fonction Messverfahren für Gebrauchseigenschaften

(IEC 60436:2004 , modifiée + A1:2009 , modifiée (IEC 60436:2004 , modifiziert + A1:2009 , modifiziert

+ A2:2012 , modifiée) + A2:2012 , modifiziert)

This European Standard was approved by CENELEC on 2016-04-11. 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, 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: Avenue Marnix 17, B-1000 Brussels

© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 50242:2016 E
EN 60436:2016 E
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SIST EN 50242:2016
EN 50242:2016 (E)
EN 60436:2016 (E)
European foreword

This document (EN 50242:2016 / EN 60436:2016) consists of the text of IEC 60436:2004,

IEC 60436:2004/A1:2009 and IEC 60436:2004/A2:2012 prepared by SC 59A "Electric dishwashers" of

IEC/TC 59 "Performance of household and similar electrical appliances", together with the common

modifications prepared by CLC/TC 59X "Performance of household and similar electrical appliances".

The following dates are fixed:
• latest date by which this document has to be implemented (dop) 2017-04-11
at national level by publication of an identical
national standard or by endorsement
(dow) 2018-04-11
• latest date by which the national standards conflicting
with this document have to be withdrawn
This document supersedes EN 50242:2008 / EN 60436:2008.

EN 50242:2016 / EN 60436:2016 includes the following significant technical changes with respect to

EN 50242:2008 / EN 60436:2008:

a) introduction of new combined cleaning and drying performance assessment (Clause 7);

b) new data on expanded measurement uncertainty (Annex ZB);
c) new Annexes ZZA, ZZB and ZZC.

Clauses, subclauses, notes, tables, figures and annexes which are additional to those in IEC 60436:2004,

IEC 60436:2004/A1:2009 and IEC 60436:2004/A2:2012 are prefixed “Z”.

In this document, the common modifications to the International Standards are indicated in red.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC [and/or CEN] 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, and supports essential requirements of EU Directive(s).

For the relationship with Regulations (EU) No 1059/2010, (EU) No 1016/2010 and (EC) No 1275/2008,

see informative Annexes ZZA, ZZB and ZZC, which are integral parts of this document.

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SIST EN 50242:2016
EN 50242:2016 (E)
EN 60436:2016 (E)
Endorsement notice

The text of the International Standard IEC 60436:2004, IEC 60436:2004/A1:2009 and

IEC 60436:2004/A2:2012 was approved by CENELEC as a European Standard with agreed common

modifications.
COMMON MODIFICATIONS
Contents
Modify the table of contents as follows:
FOREWORD
INTRODUCTION
INTRODUCTION TO AMENDMENT 2
1 Scope
2 Normative references
3 Definitions related to the appliance
4 List of measurements
5 General conditions for measurements
5.1 General
5.2 Conditioning of the machine under test and sequence of test procedures
5.3 Electricity supply for machines
5.4 Test programme
5.5 Ambient conditions
5.6 Water supply
5.7 Detergent
5.8 Rinse agent
5.9 Salt
6 Combined cleaning and drying performance tests
6.1 General and purpose
6.2 Load
6.3 Soiling agents
6.4 Preparation and application of soiling agents
6.5 Drying of the soiled dishes
6.6 Loading and operating
6.7 Evaluation
6.8 Expressing results
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SIST EN 50242:2016
EN 50242:2016 (E)
EN 60436:2016 (E)
7 Combined cleaning and drying performance assessment
7.1 General
7.2 General requirements to enable subsequent cleaning assessment
7.3 Determination of the drying performance
7.4 Determination of the cleaning performance
7.5 Results
8 Energy consumption, water consumption and time
8.1 General and purpose
8.2 Method of measurement
9 Airborne acoustical noise
Annex A (normative) Place settings and serving pieces (non-AHAM style load)
Annex B (normative) AHAM style load
Annex C (normative) Illustration of soil distribution
Annex D (normative) Test materials for laboratories
Annex E (normative) Description of the reference machine [Type 1]
Annex F (informative) Addresses of suppliers
Annex G (normative) Microwave oven and through-circulation thermal cabinet
Annex H (informative) Guidelines for assessing cleaning performance
Annex I (normative) Test enclosure for built-in dishwasher
Annex J (informative) Flow chart – test sequence for EN 50242
Annex K (informative) Shade chart
Annex L (informative) Test report format
Annex M (informative) Adjusting water consumption in the reference dishwasher
Annex N (normative) Description of the reference machine [Type 2]

Annex O (normative) Additional aspects of the energy consumption of dishwashers [based on 59D/343/CDV]

Annex ZA (informative) Pictures of the soiled items
Annex ZB (informative) Uncertainty of measurements
Annex ZC (informative) Tolerances and control procedures
Annex ZD (informative) Template for test report
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SIST EN 50242:2016
EN 50242:2016 (E)
EN 60436:2016 (E)

Annex ZZA (informative) Relationship between this European Standard and the energy labelling

requirements of Commission Delegated Regulation (EU) No 1059/2010 aimed to be covered

Annex ZZB (informative) Relationship between this European Standard and the ecodesign requirements

of Commission Regulation (EU) No 1016/2010 aimed to be covered

Annex ZZC (informative) Relationship between this European Standard and the ecodesign requirements

of Commission Regulation (EC) No 1275/2008 aimed to be covered.
Bibliography
Figure 1 – Position of the glasses on the microwave turntable

Figure G.1 – Illustration chart 1: Location of the thermocouple on upper, intermediate and lower wire

sheet

Figure G.2 – Illustration chart 2: The thermal cabinet filled with dishes (pictures of the soiled items: see

Annex ZA)
Figure I.1 – Test enclosure for built-in dishwasher
Figure N.1 – Maximum water level at the end of programme
Figure N.2 – Reference machine [Type 2] loading plan

Figure O.Z1 – Measurement procedure for the low power modes (left on mode and off mode)

Table 1 – Evaluation to determine the drying index
Table 2 – Evaluation of cleaning tests
Table 3 – Evaluation to determine the cleaning index
Table 4 – Numerical Values of the t-factor for statistical calculations
Table L.1 – Detailed results for test machine(s) and reference machine

Table ZB.1 – Relative expanded uncertainty of measured values of this European Standard

Table ZD.1 – Test report template

Table ZZA.1 – Correspondence between this European Standard and Commission Delegated Regulation

(EU) No 1059/2010 of 28 September 2010 supplementing Directive 2010/30/EU of the European

Parliament and of the Council with regard to energy labelling of household dishwashers [OJ L 314,

30.11.2010] and Commission’s standardization request M/481

Table ZZB.1 – Correspondence between this European Standard and Commission Regulation (EU)

No 1016/2010 of 10 November 2010 implementing Directive 2009/125/EC of the European Parliament

and of the Council with regard to ecodesign requirements for household dishwashers [OJ L 293,

11.11.2010] and Commission’s standardization request M/481

Table ZZC.1 – Correspondence between this European Standard and Commission Regulation (EC)

No 1275/2008 of 17 December 2008 implementing Directive 2005/32/EC of the European Parliament and

of the Council with regard to ecodesign requirements for standby and off mode electric power

consumption of electrical and electronic household and office equipment [OJ L 339, 18.12.2008] and

Commission’s standardization request M/481
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SIST EN 50242:2016
EN 50242:2016 (E)
EN 60436:2016 (E)
Introduction
Replace the existing introductions by the following:

This new edition of EN 50242 / EN 60436 has been developed based on the mandate M/481 to CEN,

CENELEC and ETSI for standardisation in the field of household dishwashers, which relates to

Directive 2009/125/EC of the European Parliament and of the Council and to Directive 2010/30/EU of the

European Parliament and of the Council.

Mandate M/481, issued by the European Commission, includes the standardization task to develop

measures in testing household dishwashers, which ensure “that the prospective harmonised standard(s)

includes a procedure that avoids an appliance being programmed to recognize the test cycles, and

reacting specifically to them, with the exclusion of test cycle recognition that is active only during the

manufacturing of the appliance”.

CLC/TC 59X/WG 2 has identified the deviating test conditions in the previous edition of this standard for

the cleaning performance assessment (soiled test load), including relevant energy and water

consumption measurements, and the drying performance assessment (unsoiled test load), excluding

energy and water consumption measurements, to be the main potential source for an appliance being

programmed to recognize the test cycle, and reacting specifically to them. Therefore, the Combined

Cleaning and Drying evaluation (CCD) has been established to repeal former deviating test conditions,

and to improve alignment with common real life household conditions.
This document submits all common modifications necessary for the application of

IEC 60436:2004/A1:2009 and IEC 60436:2004/A2:2012 in Europe. Accordingly, it incorporates the

changes made in EN 50242:2008/A11:2012 / EN 60436:2008/A11:2012.

In addition, this document submits modifications to Annex O “Additional aspects of the energy

consumption of dishwashers” based on the FDIS draft of IEC 60436 4th Edition prepared by SC 59A

"Electric dishwashers" of IEC/TC 59 "Performance of household and similar electrical appliances".

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SIST EN 50242:2016
EN 50242:2016 (E)
EN 60436:2016 (E)
1 Scope

In the first sentence of the first paragraph, replace ‘International Standard’ by ‘European Standard’.

2 Normative references
Add the following new references:

EN 50564:2011, Electrical and electronic household and office equipment – Measurement of low power

consumption (IEC 62301:2011, modified)

EN ISO 80000-1:2013, Quantities and units – Part 1: General (ISO 80000-1:2009 + Cor 1:2011)

ISO 3310 series, Test sieves - Technical requirements and testing
Modify the referenced documents as follows:
EN 60350 series, Household electric cooking appliances (IEC 60350 series)

EN 60704-2-3, Household and similar electrical appliances – Test code for the determination of airborne

acoustical noise – Part 2-3: Particular requirements for dishwashers (IEC 60704-2-3)

EN 60704-3, Household and similar electrical appliances – Test code for the determination of airborne

acoustical noise – Part 3: Procedure for determining and verifying declared noise emission values

(IEC 60704-3)

EN 60705, Household microwave ovens – Methods for measuring performance (IEC 60705)

EN 60734, Household electrical appliances – Performance – Hard water for testing (IEC 60734)

AHAM DW-1:2003, Performance testing methods for household electric dishwashers
3 Terms and definitions
Replace the heading of Clause 3 by the following:
3 Definitions related to the appliance
3.16
off mode
Delete the Note 2.
3.17
left on mode
Replace the definition by the following:

the lowest power consumption mode that may persist for an indefinite time after the completion of the

programme, opened and unlatched door without any further intervention of the user

3.18
delay start mode
Delete the note.
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SIST EN 50242:2016
EN 50242:2016 (E)
EN 60436:2016 (E)
Add the following new definitions:
3.Z1
left on mode duration

time for the dishwasher to revert automatically to off mode after the end of the programme with the door

unlatched and opened; mode applies if the test dishwasher is equipped with a power management

system
Note 1 to entry: The left on mode duration is declared by the manufacturer.

Note 2 to entry: End of programme is reached when end of programme indicator is activated or when all activities cease if there

is no end of programme indicator (according to 3.6 and 3.7).
3.Z2
power management system

system within the test dishwasher which allows it to revert automatically to off mode

4 List of measurements
Replace the first bullet point by the following:

- the combined cleaning and drying performance according to Clause 6 and Clause 7.

Delete the second bullet point.
5 General conditions for measurements
5.1 General
Replace the last sentence of the second paragraph by:

The reference machine shall be in accordance with the description given in Annex E or Annex N

respectively.
Add a new paragraph after the last sentence:

Rounding shall only be applied to reported values in Clause Z1, Clause Z2 and Annex L. 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.

5.1.1 Free standing dishwashers
Replace the second sentence by the following:

The dishwasher manufacturer’s instructions regarding installation and use of the dishwasher shall be

followed.
5.2 Conditioning of the machine under test and sequence of test procedures
Modify the two paragraphs of the subclause as follows:

Before conducting the performance tests, the dishwasher shall be operated for at least three complete

cycles using no load or a clean load with reference detergent (specified in 5.7) and with rinse agent

(specified in 5.8). If noise measurements should be done, they should be carried out before any

performance measurements and in accordance to Clause 8. No additional cycles shall be carried out on

the machine under test between the sequential steps specified in the following procedure.

The tests of cleaning performance and drying performance shall be performed simultaneously. The

determination of energy, water and cycle/programme time (Clause 8) shall be done in conjunction with

the combined cleaning and drying performance (Clauses 6 and 7) tests.
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SIST EN 50242:2016
EN 50242:2016 (E)
EN 60436:2016 (E)
5.3 Electricity supply for machines
Replace the text of Subclause 5.3.1.1 Voltage by the following:
The supply voltage shall be maintained at 230 V ± 1 %.
The supply voltage measured during the tests shall be recorded.
Modify Subclause 5.3.2.1 Voltage as follows:

The supply voltage shall be set at 230 V a.c. and maintained within ± 1 % throughout the test. The

measured voltage shall be reported.
5.4 Test programme
Replace the first sentence of the first paragraph by:

For energy labelling and / or ecodesign purposes, the programme to be tested shall be the cycle which

cleans normally soiled tableware (standard cleaning and drying cycle) and shall be named “eco”. The

name “eco” shall be used once and exclusively for this standard test programme. The only other

additional information which could be combined with the term “eco” is temperature.

Replace the text of the note by:

The formatting of the phrase “eco“ is not restricted in terms of font, font size, case sensitivity, colour or accentuations like the usage

of italic letter or underlining etc.
Replace the second paragraph by the following:

The same programme shall be used for measuring the combined cleaning and drying performance

according to Clauses 6 and 7, the energy and water consumption and time according to Clause 8, and

the noise according to Clause 9, if tested.
5.5 Ambient conditions
For both drying methods, replace "(20 ± 2) °C" by "(23 ± 2) °C".
For the oven drying method, replace "(55 ± 10) % RH" by "(55 ± 5) % RH".
Add the following sentence after the last paragraph:

For energy labelling and / or ecodesign purposes, the air-dry method is not permitted.

5.6.2 Water supply – Temperature
Add the following paragraph after the list:

The volume of the water pipe after the measurement device for temperature up to the connection point to

the water inlet hose of the test dishwasher shall not exceed 250 ml.

If a bypass to drain water is installed at each connection to the water inlet hose(s) of the dishwasher the

bypass shall be opened before starting tests until the water inlet temperature is in the required range. If

the temperature is measured in the circulation loop, the volume of the spur taking the water from the

circulation loop shall not exceed 250 ml.

For energy labelling and / or ecodesign purposes, the use of hot water is not permitted.

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SIST EN 50242:2016
EN 50242:2016 (E)
EN 60436:2016 (E)
5.6.3 Hardness

In the second sentence of the first paragraph, replace ‘IEC 60734’ by ‘EN 60734’.

Add the following sentences after the first paragraph:

For energy labelling and / or ecodesign purposes, if the appliance is not equipped with a water softener,

the hardest water which is permitted by the manufacturer's instructions shall be used, otherwise only

water of (2,5 ± 0,5) mmol/l shall be used.
5.7 Detergent
Replace the text of the paragraph by the following:

For energy labelling and / or ecodesign purposes, the reference detergent B, as described in Annex D,

shall be used.

The quantity shall be as recommended by the manufacturer, but it shall not be more than

– 2,5 g/place setting for dishwashers with a capacity of ≥ 10 place settings;
– 3,0 g/place setting for dishwashers with a capacity of < 10 place settings.
If no recommendation is given by the manufacturer, use
– 2,0 g/place setting for dishwashers with a capacity of ≥ 10 place settings;
– 2,5 g/place setting for dishwashers with a capacity of < 10 place settings.

The total quantity of detergent, in grams, used for main wash and pre-wash during the tests shall be

recorded.

The detergent shall be placed in the dishwasher immediately prior to starting the programme. If a

dispenser is incorporated in the dishwasher, it shall be used. The dispenser shall be clean and dry prior to

the placement of detergent. In the absence of manufacturer’s recommendations, the detergent shall be

placed in the main compartment of the dispenser.

Detergent from the same batch shall be used for the dishwasher under test and for the reference

dishwasher.

The detergent shall be stored in waterproof bags in quantities of no more than 1 kg in a cool and dry

atmosphere. It shall be used within six months after production and within one month of opening.

Before using, the detergent shall be homogenized in accordance with ISO 607 for example using a

sample dividing device.
NOTE For a supplier of a suitable sample dividing device, see Annex F.
5.8 Rinse agent
Add the following sentence between the first paragraph and NOTE 1:

For energy labelling and / or ecodesign purposes, only Formula III rinse aid (acidic) shall be used.

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SIST EN 50242:2016
EN 50242:2016 (E)
EN 60436:2016 (E)
6 Cleaning performance
Replace the heading of Clause 6 by the following:
6 Combined cleaning and drying performance tests
6.1 General and purpose
Modify the first paragraph as follows:

The purpose of this test is to measure how well the appliance cleans and dries normally soiled place

settings and serving pieces.
Replace the first sentence of the second paragraph by:

The tests are carried out in parallel with one of the reference machines specified in Annex E or Annex N.

6.2 Load
Add between the first and second paragraphs the following:

For energy labelling and / or ecodesign purposes, test load items according to Annex A shall be used.

In the paragraph between Note 1 and Note 2, replace "with 6.7" by 'with Clause 7".

Replace the second note by the following:

NOTE 2 Reconditioning in a dishwasher should be done using detergent B (refer to Annex D).

Add after the last paragraph the following new paragraphs:
The items should be used for not more than 200 cycles where soiling is applied.

After each cleaning and drying performance test with five to eight cycles a special normalization cycle

shall be performed in order to avoid residual scale formation on the test load. For this purpose clean load

is loaded into a dishwasher (no test or reference machine) having a normal / daily use programme. This

programme is run with 30 g of anhydrous fine granular citric acid (Supplier see Clause F.Z2) instead of

detergent for one cycle.

In case new test load is started to use in the tests, ten cycles using detergent (specified in 5.7) and rinse

aid (specified in 5.7) shall be performed in order to avoid the deviations in the test results of tests

performed with new load and used load.

Soup plates (specified in Clause A.2) soiled with oat flakes (specified in 6.4.5) shall be free of starch

residues from the previous tests.

NOTE 3 This can be checked by Lugols solution after each cleaning performance test. Lugols solution is a 1 % Iodine/potassium

iodide solution (Merck 109261), which may be obtained from supplier mentioned in Clause F.Z2.

6.3 Soiling agents
Add the following new paragraphs after the last paragraph of 6.3:

All soiling materials used for the reference machine and for the machine under test shall be from the

same batch.

For energy labelling and / or ecodesign purposes, it is necessary that the soilings have the same

properties in all laboratories to ensure comparable and reproducible results.
---------------------- Page: 13 ----------------------
SIST EN 50242:2016
EN 50242:2016 (E)
EN 60436:2016 (E)

Soilings from the same batch are offered by the supplier mentioned in Clause F.14.

Delete the last sentence of the subclause.
6.4 Preparation and application of soiling agents
Modify the first sentence of the first paragraph as follows:

Unless specifically stated otherwise, all soiling agents are to be freshly prepared for each test and have to

be finally prepared and applied to the test items at the date of testing.
Add the following Note after Note 1:
NOTE 2 Refer to Annex ZA for illustration of soiling.
6.4.1.1 Items required for preparation
Add the following sentence at the end of the first bullet point:
For energy labelling and / or ecodesign purposes, only UHT milk shall be used.
Modify the last bullet point as follows:
– Pipette (10 ml) (see Clause F.Z1)
6.4.1.2 Conversion
Replace the entire paragraph by the following:

If the power levels of the microwave oven used are not equal to the rated values (780 W and 150 W)

according to Annex G but within the given tolerances the heating times shall be corrected as follows:

Bosch model HMT752F Approved microwave oven for tests
(e.g. Bosch HMT742C; HMT743C; HMT75M42 )
P ⋅ t
P ⋅ Z
1 1
t = t =
(Z1)
u,1 u,1
P P
u,1 u,1
P ⋅t P ⋅ t
2 2 2 2
t = t =
(Z2)
u,2 u,2
P P
u,2 u,2
where
P is 780 W;
P is 150 W;
t is 4 min;
t is 10 min;

1) “Bosch HMT…" is the trade name of a product supplied by Bosch. This information is provided for the convenience of users of

this European Standard and does not constitute an endorsement by the CENELEC of this trademark. Items of the similar

specification may be used if they can be shown to lead to equivalent results.
---------------------- Page: 14 ----------------------
SIST EN 50242:2016
EN 50242:2016 (E)
EN 60436:2016 (E)

Z is the recommended time setting in min in the attached data sheet which will be delivered

together with the microwave oven as described in Clause G.1;
P is the actual max. power level used in W (measured according to EN 60705);
u,1
t is the corresponding heating time to be used in min;
u,1
P is the actual reduced power level used in W [determined by equation (Z3)];
u,2
t : is the corresponding actual heating time to be used in min.
u,2
u,1
( ) (Z3)
P = t −t
u,2 on up
where

t is the time of the elementary period of the magnetron in the microwave oven at the

reduced power level in s;
t is the time the microwave oven is on within the elementary period in s;
t is 1,6 s, which is the magnetron filament heating-up time.
Use levels, which are close to the rated levels.
6.4.1.3 Pre-heating the microwave oven
Replace the content of the subclause by the following:
Before cooking the milk in the glasses, heat up the microwave oven as follows:
• Place six glasses, each filled with 50 ml of water, in the microwave oven;

• Place the glasses symmetrically in a circle of 160 mm diameter (centre of the circle = centre of the

glass turntable). See Figure 1.

• Operate the microwave oven for 4 min or respectively Z min depending on the oven type (see above)

at a power level of 780 W and then for 10 min at a power level of 150 W, or at the corrected cooking

times calculated above for the power level used. The time Z can be found in the technical instructions

for the particular microwave.
After pre-cooking, take the water-filled glasses out of the microwave oven.
6.4.1.4 Application
Add the following between the first and the second paragraphs:

It is recommended to use the pipette of Socorex Company. Details are given in Clause F.Z1.

6.4.1.5 Cooking process
Modify the third and fourth paragraphs:

After the cooking period in the microwave oven, the colour of the cooked milk shall be compared with the

shade chart in Annex K. The colour at the bottom of the glass shall have at least colour of shade No. 4 on

the shade chart and not exceed colour of shade No. 6.

Small areas of the milk skin shall not be darker than colour of shade No. 12 on the shade chart.

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SIST EN 50242:2016
EN 50242:2016 (E)
EN 60436:2016 (E)
Add the following after the fourth paragraph:

For colour comparing only original colour sheets shall be used, which may be obtained from supplier

mentioned in Clause F.7.
Replace Figure 1 as follows:
Centre of the beakers to lie
on a circle of 160 mm
The beaker shall remain
flat and flush on the platter
surface.
160 mm
Figure 1 – Position of the glasses on the microwave turntable
6.4.2 Tea
Add the following sentence at the end of the subclause:

For energy labelling and / or ecodesign purposes, only black tea as described in Annex F shall be used.

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SIST EN 50242:2016
EN 50242:2016 (E)
EN 60436:2016 (E)
6.4.2.1 Preparation
Add the following paragraph between the first paragraph and the note:

For energy labelling and / or ecodesign purposes, the hardness of the water shall be as defined in 5.6.3.

If the hardness needs to be adjusted, it shall be prepared according to EN 60734, Method C.

6.4.2.2 Pre-drying for oven drying method
Modify the subclause as fo
...

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