BSI PD IEC/PAS 62958:2015
$167.15
Clothes washing machines for household use. Method for measuring the microbial contamination reduction
| Published By | Publication Date | Number of Pages |
| BSI | 2015 | 34 |
This Publicly Available Specification (PAS) specifies a test method for measuring the reduction of microbial contamination in clothes washing machines and of the possible cross contamination to uncontaminated load.
NOTE A significant differentiation in microorganism contamination reduction capability of washing machines can be expected at wash temperature not higher than 40 °C.
This PAS applies to clothes washing machines for household use, with or without heating devices utilising cold and/or hot water supply. It also covers washing machines which specify the use of no detergent for normal use. This PAS applies also to washing machines for communal use in blocks of flats or in launderettes.
This PAS does not deal with professional washing machines nor with commercial laundry operations associated with food service, hospital linens or other non-residential applications. It also does not address the needs of persons with specific health conditions requiring special sanitization and/or disinfection techniques.
This PAS does not specify safety requirements and does not deal with performance of washing machines measured under IEC 60456 nor with effects on fabrics.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | CONTENTS |
| 7 | FOREWORD |
| 9 | INTRODUCTION |
| 10 | 1 Scope 2 Normative references |
| 11 | 3 Terms, definitions and symbols 3.1 Terms and definitions 3.2 Symbols |
| 12 | 4 Requirements 5 Test conditions, materials, equipment and instrumentation 5.1 Test conditions 5.2 Materials and reagents 5.2.1 Microorganisms for test purposes 5.2.2 Culture media and solutions |
| 13 | Tables Table 1 – Composition of Tryptone Soy Agar (TSA) Table 2 – Composition of Sabouraud Dextrose Agar with Chloramphenicol Table 3 – Composition of Cetrimide Agar |
| 14 | Table 4 – Composition of Baird-Parker Agar Table 5 – Composition of Malt Extract Agar (MEA) Table 6 – Composition of Tryptone Soy Broth (TSB) |
| 15 | 5.2.3 Detergent Table 7 – Composition of diluting agent Table 8 – Composition of recommended neutralisation solution |
| 16 | 5.3 Equipment 5.3.1 General 5.3.2 Incubator 5.3.3 Autoclave 5.3.4 Microorganism carrier 5.3.5 Pipettes 5.3.6 Electromechanical agitator 5.3.7 Centrifuge, centrifuge tubes 5.3.8 Base load |
| 17 | 5.3.9 Measuring equipment for assessing temperature profile 5.3.10 Measuring equipment for water consumption 6 Tests 6.1 Test method principles 6.2 Preparation of test washing machine 6.3 Preparation of test microorganisms and bio monitors 6.3.1 Cultures Table 9 – Specifications for temperature logger |
| 19 | 6.3.2 Bio monitors |
| 20 | 6.4 Main test 6.4.1 General 6.4.2 Evidence of test microorganisms 6.5 Validation 6.5.1 Enumeration of microorganisms before exposition N0 (bio monitor reference) 6.5.2 Negative control (cross contamination) |
| 21 | 6.5.3 Determination of water quality 6.5.4 Determination of water quantity in the main wash 7 Evaluation 7.1 Log reduction 7.2 Cross contamination 8 Test report |
| 23 | Annex A (informative) Microorganism reduction in household washing machines with risk class 1 test microorganisms for internal development purpose A.1 Scope A.2 General recommendation A.3 Material and reagents A.3.1 Microorganisms on bio monitors A.3.2 Water for culture media and solutions A.3.3 Culture media and solutions |
| 24 | Table A.1 – Composition of Sabouraud Dextrose Agar Table A.2 – Composition of Columbia CNA Agar |
| 25 | A.3.4 Detergent A.4 Equipment A.4.1 Incubator A.4.2 Autoclave A.4.3 Microorganism carrier A.4.4 Pipettes A.4.5 Electromechanical agitator A.4.6 Centrifuge A.4.7 Base load A.4.8 Measuring equipment for assessing temperature profile A.4.9 Measuring equipment for water consumption A.5 Tests A.5.1 Test method principles |
| 26 | A.5.2 Preparation of washing machine A.5.3 Preparation of test organisms and bio monitors |
| 27 | A.5.4 Main test Figures Figure A.1 – Scheme for preparing a dilution series |
| 28 | A.5.5 Validation A.6 Evaluation A.6.1 Plate counts per bio monitor |
| 29 | A.6.2 Log reductions A.6.3 Cross contamination A.7 Test report |
| 30 | Annex B (informative) Sources of materials and supplies B.1 Disclaimer B.2 Microorganism carriers B.3 Electromechanical agitator B.4 Ready-to-use bio monitors B.5 Nonionic surfactant and emulsifier |
| 31 | Bibliography |
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