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
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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, P
...