IEC 60734:2012

IEC 60734 ®
Edition 4.0 2012-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household electrical appliances – Performance – Water for testing

Appareils électrodomestiques – Aptitude à la fonction – Eau pour les essais
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IEC 60734 ®
Edition 4.0 2012-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household electrical appliances – Performance – Water for testing

Appareils électrodomestiques – Aptitude à la fonction – Eau pour les essais

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX N
ICS 97.060 ISBN 978-2-83220-139-8

– 2 – 60734 © IEC:2012
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and symbols . 6
3.1 Terms and definitions . 6
3.2 Symbols . 7
4 Measurements and accuracy . 8
5 Standard water . 8
5.1 Water types . 8
5.2 Additional requirements . 9
6 Preparation of standard water. 9
6.1 Demineralisation of natural water . 9
6.2 Preparation of standard water method B . 9
6.2.1 Principle . 9
6.2.2 Procedure . 9
6.2.3 Composition of standard water prepared by method B . 10
6.3 Preparation of water methods C1 and C2 . 10
6.3.1 Principle . 10
6.3.2 Composition of standard water prepared by methods C1 and C2 . 10
6.3.3 Hardness adjustment method C1 . 11
6.3.4 Hardness adjustment method C2 . 11
6.4 Preparation of water method C3 . 11
6.4.1 Principle . 11
6.4.2 Determination of initial water properties . 11
6.4.3 Dilution with demineralised water . 11
6.4.4 Determination of the required salt additions . 12
6.4.5 Adjusting PH . 13
7 Storage of standard water . 13
7.1 General . 13
7.2 Effects of heat on standard water . 13
8 Checking . 13
Annex A (informative) Water hardness – Conversion table . 14

Table 1 – Measurement specifications . 8
Table 2 – Composition of soft, medium hard, hard and very hard water . 8
Table 3 – Maximum content of heavy metal ions and chloride . 9
Table 4 – Amounts of salt solutions to be added to 1 l of demineralised water . 10
Table 5 – Expected composition of standard water achieved by method B . 10
Table A.1 – Conversion in French, English, German degrees and grains per gallon
(US) for the values of specified total hardness . 14

60734 © IEC:2012 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD ELECTRICAL APPLIANCES –
PERFORMANCE – WATER FOR TESTING

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-
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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
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International standard IEC 60734 has been prepared by subcommittee 59D: Home laundry
appliances, of IEC Technical Committee 59: Performance of household and similar electrical
appliances.
This fourth edition cancels and replaces the third edition published in 2001. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) four types of standard water, from soft to very hard, are defined with specification for
hardness, alkalinity and conductivity;
b) preparation method A is no longer maintained; and
c) method C3 is added to prepare water of specified hardness, conductivity and alkalinity
starting with natural water while the natural water based methods C1 and C2 focus on
water hardness only, without allowing control or setting of alkalinity and conductivity.

– 4 – 60734 © IEC:2012
The text of this standard is based on the following documents:
FDIS Report on voting
59/398/FDIS 59/399/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
Words in bold in the text are defined in Clause 3.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
60734 © IEC:2012 – 5 –
INTRODUCTION
This publication specifies water qualities with regard to hardness, alkalinity and conductivity
and describes several methods to prepare water to be used for testing household appliances
in cases where the water quality is important for the reproducibility of the test results. The
described methods allow the preparation of water complying with all three target requirements
(hardness, alkalinity, conductivity), or just hardness – depending on the requirements set
out in the referring appliance test method.
Compared to the third edition of IEC 60734 (2001), method A is no longer maintained and
another method, method C3, is added.
Method B is used to prepare water of the correct total hardness. Preparation starts with
demineralised water in which hardening salts are dissolved. It will give water specified
temporary as well as permanent hardness, whilst complying with the specifications for
alkalinity and conductivity.
Method C1 starts with natural water with higher hardness than required, while method C2
starts with soft natural water, which is hardened. Depending on the composition of the natural
water, several other ions might be present. Restrictions regarding the amounts are given for
some ions, which may influence the cleaning results when testing washing machines and
dishwashers. No specification regarding temporary and permanent hardness is given.
The development of method C3 appreciates the need for water of specified conductivity and
alkalinity for testing the performance of tumble dryers. While synthetic method B meets this
need, the natural water based methods C1 and C2 focus on water hardness only without
allowing control or setting of alkalinity and conductivity. The new method C3, which starts
with natural water, fills that gap.

– 6 – 60734 © IEC:2012
HOUSEHOLD ELECTRICAL APPLIANCES –
PERFORMANCE – WATER FOR TESTING

1 Scope
This International Standard describes the preparation of four types of water of different
hardness, conductivity and alkalinity, intended to be used for testing the performance of
household appliances such as washing machines, dishwashers, tumble dryers, steam irons
etc.
It defines the characteristics of these waters and establishes various methods to be used for
obtaining them. It also includes specifications for required measurements.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
ISO 6059, Water quality – Determination of the sum of calcium and magnesium – EDTA
titrimetric method
ISO 7888, Water quality – Determination of electrical conductivity
ISO 9963-1, Water quality – Determination of alkalinity – Part 1: Determination of total and
composite alkalinity
ISO 10523, Water quality – Determination of pH
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the following definitions apply.
3.1.1
water hardness
parameter indicating the quantity of alkaline earth salts (bicarbonates, sulphates, chlorides
etc.) present in the water
3.1.2
total hardness
sum of calcium and magnesium ions in the water
3.1.3
temporary hardness
fraction of the total hardness equivalent to the bicarbonate content
3.1.4
permanent hardness
difference between the total hardness and the temporary hardness

60734 © IEC:2012 – 7 –
3.1.5
alkalinity
ability of a solution to neutralize acids to the equivalence point of carbonate or bicarbonate,
i.e. equals the stoichiometric sum of the bases in the solution
3.1.6
conductivity
ability of a solution to conduct an electric current, i.e. measure of the stoichiometric sum of
the ions dissolved in the solution
3.2 Symbols
Symbol Unit Definition
A mmol/l initial alkalinity
A mmol/l target alkalinity
req
c (Fe) mg/l initial iron content
c (Fe) mg/l maximum iron content
max
c (Cu) mg/l initial copper content
c (Cu) mg/l maximum copper content
max
c (Mn) mg/l initial manganese content
c (Mn) mg/l maximum manganese content
max
-
c (Cl ) mmol/l initial chloride content
-
c (Cl ) mmol/l maximum chloride content
max
cond initial conductivity
µS/cm
cond target conductivity
µS/cm
req
dil – dilution factor
dil – lowest possible dilution factor that allows the preparation of
min
water to meet all requirements
dil – lowest possible dilution factor that allows the preparation of
min(h,A,cond)
water to meet the total hardness, alkalinity and
conductivity requirements
dil – lowest possible dilution factor that allows the preparation of
min(Fe)
water to meet the maximum iron content requirement
dil – lowest possible dilution factor that allows the preparation of
min(Cu)
water to meet the maximum copper content requirement
dil – lowest possible dilution factor that allows the preparation of
min(Mn)
water to meet the maximum manganese content
requirement
dil – lowest possible dilution factor that allows the preparation of
min(Cl-)
water to meet the maximum chloride content requirement
k – constants
A
k – constants
H
h initial total hardness
h target total hardness
req
addition ml quantity of solution to be added to reach required
A
alkalinity
addition ml quantity of solution to be added to reach required total
h
hardness
addition ml quantity of solution to be added to reach required
cond
conductivity
– 8 – 60734 © IEC:2012
4 Measurements and accuracy
Measurements according to this International Standard shall comply with the following
specifications in Table 1:
Table 1 – Measurement specifications

Parameter Unit Minimum Additional requirements and remarks
accuracy
Total hardness mmol/l See ISO 6059 for specifications of such determination.
± 2 %
3-
Alkalinity mmol/l The alkalinity is measured as the concentration of (HCO ). If
± 5 %
determined by titration with hydrochloric acid the endpoint shall
be pH 4,5 – the stoichiometric factor then is 1.
See ISO 9963-1 for specifications of such determination.
Conductivity
µS/cm ± 5 % See ISO 7888 for specifications of such determination.
at 20 °C
pH - The accuracy requirement shall be met over a temperature
± 0,05
range of 15 °C to 25 °C.
See ISO 10523 for specifications of such determination.
Content of iron, copper, - - The requirements for these parameters are maximum content
manganese or chloride requirements. The accuracy of the measurement shall be
sufficient to prove compliance with these requirements.

5 Standard water
5.1 Water types
In Table 2, different water types are defined, which are all referred to by their level of total
hardness and specified with specific levels of total hardness, alkalinity, conductivity and
pH.
Table 2 – Composition of soft, medium hard, hard and very hard water
Water type
Standard
Property Unit
Standard soft Standard hard Standard very
medium hard
water water hard water
water
mmol/l
0,50 1,50 2,50 3,50
Total hardness
2+ 2+ ± 0,20 ± 0,20 ± 0,20 ± 0,20
(Ca /Mg )
mmol/l
0,67 2,00 3,35 4,70
Alkalinity
-
± 0,20 ± 0,20 ± 0,20 ± 0,20
(HCO )
Conductivity 150 450 750 1050
µS/cm
(at 20 °C) ± 50 ± 100 ± 150 ± 250
pH
- 8,0 to 8,5 7,5 to 7,9 7,3 to 7,7 -
(at 20 °C)
Other test methods and standards referring to the water types in this International Standard
may require to meet all or only selected properties given in Table 2.
NOTE With the specification of these four standard waters it is possible to select one or more standardised
waters, which would approximate the local natural waters available. If any other water hardness is needed, it can
be prepared in a similar way by interpolation of the given specifications.

60734 © IEC:2012 – 9 –
5.2 Additional requirements
Other test methods and standards referring to the water types described in this International
Standard may also require that any or all of the specifications shown in Table 3 are met.
Table 3 – Maximum content of heavy metal ions and chloride
Water type
Standard Standard
Property Unit
Standard Standard
medium hard very hard
soft water hard water
water water
Max. iron content, c (Fe) mg/l 0,1
max
Max. copper content, c (Cu) mg/l 0,05
max
Max. manganese content, c (Mn) mg/l 0,05
max
Not
-
Max. chloride content, c (Cl ) mmol/l 4,5
max
applicable
NOTE Iron, copper and manganese can influence bleach performance if the water is used for cleaning
purposes. The chloride content may be of relevance for testing dishwashers. Standard very hard water does not
meet the chloride content requirement.

6 Preparation of standard water
6.1 Demineralisation of natural water
Natural water is demineralised so that its specific resistance is 100 000 Ω/cm or more (i.e. its
conductivity is 10 μS/cm at maximum). Water of this quality can be obtained e.g. using
mixed cation and anion exchange resins or by reverse osmosis.
When an ion exchange resin is new, the first one or two preparations should be discarded.
This is not necessary after each normal regeneration.
6.2 Preparation of standard water method B
6.2.1 Principle
This preparation method starts with demineralised water to which salts are added to achieve
the specified water properties.
6.2.2 Procedure
Prepare the following solutions of salts in demineralised water:
− Solution 1 NaHCO 67,2 g/l (800 mmol/l)
− Solution 2 MgSO · 7H O 38,0 g/l (154,2 mmol/l)
4 2
− Solution 3 CaCl ·2H O 65,6 g/l (446,1 mmol/l)
2 2
Add specified amounts of the three solutions as given in Table 4 to 0,7 l of demineralised
water and add up to 1,0 l for preparation of the desired standard water. If large amounts of
water are prepared, the addition may be performed through automatic dosage. Finally, adjust
the pH to the range specified in Table 2 with HCl or NaOH before use.

– 10 – 60734 © IEC:2012
Table 4 – Amounts of salt solutions to be added to 1 l of demineralised water
Water type
Solution
Standard soft Standard medium Standard hard Standard very
water hard water water hard water
Solution 1
0,83 ml 2,50 ml 4,17 ml 5,84 ml
(NaHCO )
Solution 2
0,83 ml 2,50 ml 4,17 ml 5,84 ml
(MgSO ·7H O)
4 2
Solution 3
0,83 ml 2,50 ml 4,17 ml 5,84 ml
(CaCl ·2H O)
2 2
6.2.3 Composition of standard water prepared by method B
The temporary hardness component of the water consists of calcium and magnesium
hydrogen carbonates Ca(HCO ) and Mg(HCO ) . The permanent hardness component
3 2 3 2
consists of the chlorides and sulphates of calcium and magnesium (CaCl , CaSO , MgCl ,
2 4 2
MgSO ). Composition of standard water achieved by method B is shown in Table 5.
Table 5 – Expected composition of standard water achieved by method B
Water type
Standard soft Standard Standard hard Standard very
water medium hard water hard water
Ions Mol. weight
water
Ion concentrations
(mmol/l)
2+
Ca 40,0 0,37 1,11 1,85 2,59
2+
Mg 24,3 0,13 0,39 0,65 0,91
HCO 61,0 0,67 2,00 3,35 4,68
–
Cl 35,5 0,75 2,23 3,75 5,23
SO 96,0 0,13 0,39 0,65 0,91
+
Na 23,0 0,67 2,00 3,35 4,68
Temporary hardness (mmol/l) 0,33 1,00 1,67 2,34

6.3 Preparation of water methods C1 and C2
6.3.1 Principle
Methods C1 and C2 allow to prepare standard water of specified total hardness starting with
natural water. Methods C1 and C2 do not adjust alkalinity or conductivity.
6.3.2 Composition of standard water prepared by methods C1 and C2
If the test method or standard referring to the water types in this standard also requires any or
all of the specifications of Table 3 to be met (maximum content of heavy metals and chloride),
the natural water shall be analyzed regarding the respective (required) properties. If the
content of iron, copper, manganese or chloride in the natural water exceeds the limits
specified in 5.2, first dilute the natural water with demineralised water.
No differentiation is made between temporary hardness and permanent hardness. The
2+ 2+
Ca /Mg ratio shall be 1,5 to 9.

60734 © IEC:2012 – 11 –
The hardness of the natural water is analyzed for its calcium and magnesium content. If the
calcium/magnesium ratio is outside the limits, adjustments are made by dissolving some of
the missing ions in the form of calcium chloride (CaCl ·2H O) or magnesium sulphate
2 2
(MgSO ·7 H O).
4 2
6.3.3 Hardness adjustment method C1
Method C1 is used if the adjusted natural water is harder than the required total hardness.
Some of the natural water is softened by replacing calcium and magnesium against sodium by
means of a cation exchange resin or by use of demineralised water for dilution. If the pH is
too low, some CO shall be removed by air bubbling.
6.3.4 Hardness adjustment method C2
Method C2 is used if the natural water is too soft. The soft natural water is mixed with calcium
and magnesium salts in such a way that the required hardness is obtained.
6.4 Preparation of water method C3
6.4.1 Principle
Method C3 allows to prepare standard water of specified total hardness, alkalinity and
conductivity starting with natural water.
6.4.2 Determination of initial water properties
The natural water shall be analyzed regarding total hardness h , alkalinity A and
0 0
conductivity cond .
If the test method or standard referring to the water types in this standard also requires any or
all of the specifications of Table 3 to be met (maximum content of heavy metals and chloride),
the natural water shall additionally be analyzed regarding the respective (required) properties:
-
c (Fe), c (Cu), c (Mn), c (Cl )
0 0 0 0
6.4.3 Dilution with demineralised water
6.4.3.1 Determination of the dilution factor
With the determined values for initial total hardness h , alkalinity A and conductivity cond
0 0 0
and the target values for these measures, a minimum dilution factor dil for these
min (h,A,cond)
parameters can be calculated as:
cond − k A − k h
0 A 0 H 0
dil =
min (h,A,cond)
cond − k A − k h
req A req H req
with k and k being the following constants:
A H
µS / cm µS / cm
k = 100 k = 224
A
H
mmol/l
mmol/l
Other dilution factors dil will also allow preparation of water of specified total
min(h,A,cond)
hardness, alkalinity and conductivity as long as the calculation of salt additions according
to 6.4.4 results in quantities equal to or larger than 0 ml.
If the test method or standard referring to the water types in this standard also requires any or
all of the specifications of Table 3 to be met (maximum content of heavy metals and chloride),
the respective minimum dilution factors are determined as:

– 12 – 60734 © IEC:2012
−
c (Fe)
c (Cu) c (Mn) c (Cl )
0 0 0 0
dil = dil = dil =
dil =
min (Fe) min (Cu) min (Mn)
−
min (Cl ) −
c (Fe) c (Cu) c (Mn)
max max max c (Cl )
max
,  ,  ,
The overall minimum required dilution factor is the highest of the determined minimum dilution
factors:
dil = max { dil ; dil ; dil ; dil ; dil }
min min (h,A,cond) min (Fe) min (Cu) min (Mn) −
min (Cl )
Depending on the result of the calculation, two cases can be distinguished:
Dilution with demineralised water is required. The minimum dilution factor in
dil > 1
min
that case is the calculated value dil .
min
dil ≤ 1 No dilution is necessary. The minimum dilution factor in that case is dil = 1.
min min
The established value for the required minimum dilution factor dil represents the lowest
min
possible dilution that allows the preparation of water to meet all requirements. For practical
may also be selected, e.g. in order to
reasons, any actual dilution factor greater than dil
min
run the process with a rounded dilution factor. The calculations in the following preparation
steps are based on the selected actual dilution factor dil:
dil ≥ dil
min
6.4.3.2 Dilution
The natural water shall be diluted with demineralised water to reach the selected dilution
factor dil.
6.4.4 Determination of the required salt additions
6.4.4.1 General
The adjustment of alkalinity, total hardness and conductivity is done with highly
concentrated salt solutions in water. The addition of the salt content adjusts the respective
parameters. The addition of the water in which the salts are dissolved represents a dilution.
However, the resulting dilution factor is very close to 1 (due to the highly concentrated
solutions) and is therefore negligible.
6.4.4.2 Adjusting alkalinity
In case alkalinity needs to be adjusted, this shall be done with a solution of 800 mmol/l
(67,2 g/l) NaHCO in demineralised water.
The quantity of that solution in ml to be added to each litre of water is:
A
A −
req
dil
addition =
alkalinity
0,8×mmol/ml
NOTE Depending on the initial and target alkalinity and the selected dilution factor, the result of calculating the
required quantity of the solution above may also be 0 ml/l.
6.4.4.3 Adjusting total hardness
In case total hardness needs to be adjusted, this shall be done with a solution of
446,1 mmol/l (65,6 g/l) CaCl ·2H O in demineralised water.
2 2
60734 © IEC:2012 – 13 –
The quantity of that solution in ml to be added to each litre of water is:
h
h −
req
dil
addition =
h
0,4461× mmol/ml
NOTE Depending on the initial and target total hardness and the selected dilution factor, the result of calculating
the required quantity of the solution above can also be 0 ml/l.
6.4.4.4 Adjusting conductivity
In case conductivity needs to be adjusted, this shall be done with a solution of 500 mmol/l
(29,22 g/l) NaCl and 500 mmol/l (71,02 g/l) Na SO in demineralised water.
2 4
The quantity of that solution in ml to be added to each litre of (diluted) water is:
(cond − k A − k h )
0 A 0 H 0
(cond − k A − k h )−
req A req H req
dil
addition = × ml/l
cond
120×µS/cm
NOTE Depending on the initial and target conductivity and the selected dilution factor, the result of calculating
the required quantity of the solution above can also be 0 ml/l.
6.4.5 Adjusting PH
Adjust the pH to within the ranges given in Table 2 with HCl or NaOH before use.
7 Storage of standard water
7.1 General
Preferably standard water shall be stored in closed tanks to exclude both air and light, to
and also to prevent contamination and growth of organic matter. If the
prevent loss of CO
tank is kept closed, the storage life is about one month but if the tank is left open the storage
life is about one day.
7.2 Effects of heat on standard water
When standard hard water is heated from 20 °C to 90 °C, scale forming will start at about
85 °C depending on the rate of heating. If it is heated to a lower temperature and kept heated,
scale formation will also occur. Over 60 °C, crystalline aragonite will be formed. Under 40 °C,
crystalline calcite will be formed.
NOTE Aragonite is voluminous with a needle structure and can rapidly obstruct small openings. Calcite is less
voluminous but has a hard structure.
8 Checking
Check all required water parameters prior to use.

– 14 – 60734 © IEC:2012
Annex A
(informative)
Water hardness – Conversion table

A.1 Correspondence of water hardness units
1 mmol/l = 2,0 milliequivalents = 2 mval/l
= 100 ppm of CaCO
= 10 parts per 100 000
= 10 French degrees (°f)
= 7,0 English degrees (°e)
= 5,6 German degrees (°dH)
= 5,8 US grains per gallon (gpg)
A.2 Conversion into different degrees of hardness
Table A.1 gives the values for French degrees, English degrees, German degrees and grains
per gallon (US) corresponding to the values of total hardness used in this standard.
Table A.1 – Conversion in French, English, German degrees and grains per gallon (US)
for the values of specified total hardness
Total hardness French degree English degree German degree Grains / gallon
mmol/l (US)
0,50 5 3,5 2,8 2,9
1,50 15 10,5 8,4 8,8
2,50 25 17,5 14,0 14,6
3,50 35 24,5 19,6 20,5
___________
– 16 – 60734 © CEI:2012
SOMMAIRE
AVANT-PROPOS . 17
INTRODUCTION . 19
1 Domaine d’application . 20
2 Références normatives . 20
3 Termes, définitions et symboles . 20
3.1 Termes et définitions . 20
3.2 Symboles . 21
4 Mesures et précision . 22
5 Eau normalisée . 22
5.1 Types d’eau . 22
5.2 Exigences supplémentaires . 23
6 Préparation de l’eau normalisée . 23
6.1 Déminéralisation de l’eau naturelle . 23
6.2 Préparation de l’eau normalisée par la méthode B . 24
6.2.1 Principe . 24
6.2.2 Procédure . 24
6.2.3 Composition de l’eau normalisée préparée par la méthode B . 24
6.3 Préparation de l’eau par les méthodes C1 et C2 . 25
6.3.1 Principe . 25
6.3.2 Composition d’une eau normalisée préparée par les méthodes C1 et
C2 . 25
6.3.3 Ajustement de la dureté par la méthode C1 . 25
6.3.4 Ajustement de la dureté par la méthode C2 . 25
6.4 Préparation de l’eau par la méthode C3 . 26
6.4.1 Principe . 26
6.4.2 Détermination des propriétés initiales de l’eau . 26
6.4.3 Dilution avec de l’eau déminéralisée . 26
6.4.4 Détermination des additions de sels nécessaires . 27
6.4.5 Ajustement du PH . 28
7 Conservation de l’eau normalisée . 28
7.1 Généralités. 28
7.2 Effets de la chaleur sur l’eau normalisée . 28
8 Vérification . 28
Annexe A (informative) Dureté de l’eau – Tableau de conversion . 29

Tableau 1 – Spécifications de mesure . 22
Tableau 2 – Composition d’une eau douce, moyennement dure, dure et très dure . 23
Tableau 3 – Teneur maximale en ions de métaux lourds et en chlorure . 23
Tableau 4 – Quantités de solutions de sels à ajouter à 1 l d’eau déminéralisée . 24
Tableau 5 – Composition prévue de l’eau normalisée obtenue avec la méthode B . 25
Tableau A.1 – Conversion en degrés français, anglais, allemand et en grains par
gallon (américains) pour les valeurs de dureté totale spécifiée . 29

60734 © CEI:2012 – 17 –
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
APPAREILS ÉLECTRODOMESTIQUES –
APTITUDE À LA FONCTION –
EAU POUR LES ESSAIS
AVANT-PROPOS
1) La Commission Electrotechnique Internationale (CEI) est une organisation mondiale de normalisation
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selon des conditions fixées par accord entre les deux organisations.
2) Les décisions ou accords officiels de la CEI concernant les questions techniques représentent, dans la mesure
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5) La CEI elle-même ne fournit aucune attestation de conformité. Des organismes de certification indépendants
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mandataires, y compris ses experts particuliers et les membres de ses comités d'études et des Comités
nationaux de la CEI, pour tout préjudice causé en cas de dommages corporels et matériels, ou de tout autre
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l’objet de droits de brevet. La CEI ne saurait être tenue pour responsable de ne pas avoir identifié de tels droits
de brevets et de ne pas avoir signalé leur existence.
La Norme internationale CEI 60734 a été établie par le sous-comité 59D: Appareils de lavage
du linge, du comité d’études 59 de la CEI: Aptitude à la fonction des appareils
électrodomestiques et analogues.
Cette quatrième
...