1、 IEC PA S 62958 Edition 1.0 2015-03 PUBLICLY A V A ILA BLE SPECIFICA TION PRE-STANDARD Clothes washing machines for household use Method for measuring the microbial contamination reduction IEC PA S 62958:2015-03(en)Copyright International Electrotechnical Commission THIS PUBLICA TION IS COPYRIGHT PR
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11、it ion 1.0 2015-03 PUBLICLY A V A ILA BLE SPECIFICA TION PR E-STA NDA RD Clothes washing machines for household use Method for measuring the microbial contamination reduction INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 97.060 ISBN 978-2-8322-2478-6 R egist er ed tr ademar k of t he Int er national
12、 Electr ot echnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.Copyright International Electrotechnical Commission 2 IEC PAS 62958:2015 IEC 2015 CONTENTS FOREWORD.5 INTRODUCTION.7 1 Scope.8 2 Normative references.8 3 Terms,definitions and symbols.9
13、 3.1 Terms and definitions.9 3.2 Symbols.9 4 Requirements.10 5 Test conditions,materials,equipment and instrumentation.10 5.1 Test conditions.10 5.2 Materials and reagents.10 5.2.1 Microorganisms for test purposes.10 5.2.2 Culture media and solutions.10 5.2.3 Detergent.13 5.3 Equipment.14 5.3.1 Gene
14、ral.14 5.3.2 Incubator.14 5.3.3 Autoclave.14 5.3.4 Microorganism carrier.14 5.3.5 Pipettes.14 5.3.6 Electromechanical agitator.14 5.3.7 Centrifuge,centrifuge tubes.14 5.3.8 Base load.14 5.3.9 Measuring equipment for assessing temperature profile.15 5.3.10 Measuring equipment for water consumption.15
15、 6 Tests.15 6.1 Test method principles.15 6.2 Preparation of test washing machine.15 6.3 Preparation of test microorganisms and bio monitors.15 6.3.1 Cultures.15 6.3.2 Bio monitors.17 6.4 Main test.18 6.4.1 General.18 6.4.2 Evidence of test microorganisms.18 6.5 Validation.18 6.5.1 Enumeration of mi
16、croorganisms before exposition N0(bio monitor reference).18 6.5.2 Negative control(cross contamination).18 6.5.3 Determination of water quality.19 6.5.4 Determination of water quantity in the main wash.19 7 Evaluation.19 7.1 Log reduction.19 7.2 Cross contamination.19 8 Test report.19 Annex A(informative)Microorganism reduction in household washing machines with risk class 1 test microorganisms for internal development purpose.21 Copyright International Electrotechnical Commission IEC PAS 62958:
