BS EN 60068-2-18:2017 – TC:2020 Edition
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Tracked Changes. Environmental testing – Tests. Test R and guidance: Water
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 104 |
IEC 60068-2-18:2017 is now available as /2 which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 60068-2-18:2017 provides methods of test applicable to products which, during transportation, storage or in service, can be subjected to falling water drops, impacting water, immersion or high pressure water impact. The primary purpose of water tests is to verify the ability of enclosures, covers and seals to maintain components and equipment in good working order after and, when necessary, under a standardized drop field or immersion in water. These tests are not corrosion tests and cannot be considered and used as such. Established water tests in other standards are not intended to simulate natural rainfall and their quoted intensities are too high to be adopted for that purpose. Therefore, in addition to the high-intensity severities, test R includes an artificial rain test based upon natural conditions but not taking into account high wind speeds generally associated with natural rain. Guidance is given on the applicability of the tests and the severities to be selected. This third edition cancels and replaces the second edition published in 2000. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a. addition of the new test method Rb 3.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 54 | National foreword |
| 57 | English CONTENTS |
| 60 | FOREWORD |
| 62 | INTRODUCTION |
| 63 | 1 Scope 2 Normative references 3 Terms and definitions |
| 64 | 4 Survey of water tests 4.1 General 4.2 Description of tests R: water |
| 65 | 5 Test Ra: falling drops 5.1 Object 5.2 Method Ra 1: artificial rain 5.2.1 General description of the test Figures Figure 1 – Structuring of test methods and equivalence with the IP Code of IEC 60529 |
| 66 | 5.2.2 Severities 5.2.3 Preconditioning 5.2.4 Initial measurements 5.2.5 Testing |
| 67 | 5.2.6 Recovery 5.2.7 Final measurements 5.2.8 Information to be given in the relevant specification Figure 2 – Test Ra, definitions of angles and axes |
| 68 | 5.3 Method Ra 2: drip box 5.3.1 General description of the test 5.3.2 Severities |
| 69 | 5.3.3 Preconditioning 5.3.4 Initial measurements 5.3.5 Testing 5.3.6 Recovery 5.3.7 Final measurements 5.3.8 Information to be given in the relevant specification |
| 70 | 6 Test Rb: impacting water 6.1 Object 6.2 Method Rb 1: oscillating tube and spray nozzle 6.2.1 General description of the test 6.2.2 Method Rb 1.1: oscillating tube |
| 72 | Tables Table 1 – Oscillating tube – Relationship of number of nozzles and total water flow to tube radius |
| 74 | 6.2.3 Method Rb 1.2: spray nozzle |
| 76 | 6.3 Method Rb 2: water jet 6.3.1 General description of the test 6.3.2 Severities |
| 77 | 6.3.3 Preconditioning 6.3.4 Initial measurements 6.3.5 Testing 6.3.6 Recovery |
| 78 | 6.3.7 Final measurements 6.3.8 Information to be given in the relevant specification 6.4 Method Rb 3: fan jet 6.4.1 General description of the test |
| 79 | 6.4.2 Severities 6.4.3 Preconditioning 6.4.4 Initial measurements 6.4.5 Testing 6.4.6 Recovery 6.4.7 Final measurements |
| 80 | 6.4.8 Information to be given in the relevant specification 7 Test Rc: immersion 7.1 Object 7.2 Method Rc 1: water tank 7.2.1 General description 7.2.2 Severities |
| 81 | 7.2.3 Preconditioning 7.2.4 Initial measurements 7.2.5 Testing 7.2.6 Recovery 7.2.7 Final measurements 7.2.8 Information to be given in the relevant specification |
| 82 | 7.3 Method Rc 2: pressurized water chamber 7.3.1 General description of the test 7.3.2 Severities 7.3.3 Preconditioning 7.3.4 Initial measurements 7.3.5 Testing |
| 83 | 7.3.6 Recovery 7.3.7 Final measurements 7.3.8 Information to be given in the relevant specification |
| 84 | Annexes Annex A (informative) Water characteristics to be considered when writing the relevant specification A.1 General A.2 Purity A.2.1 General A.2.2 Effect on test specimen A.2.3 Effect on test apparatus |
| 85 | A.2.4 Ingress of water into the specimen A.3 Water quality for tests R A.3.1 Test Ra: falling drops A.3.2 Test Rb: impacting water A.3.3 Test Rc: immersion Table A.1 – Typical characteristics of water with approximate values |
| 86 | Annex B (informative) General guidance B.1 General B.2 Factors affecting the test severity |
| 87 | Annex C (informative) Guidance for test Ra C.1 General C.2 Example of test apparatus C.2.1 Method Ra 1: artificial rain |
| 88 | C.2.2 Method Ra 2: drip box Figure C.1 – Test Ra 1, test apparatus and measurement setupfor drop sizes and intensity for artificial rain method |
| 89 | C.3 Verification of test apparatus C.3.1 Intensity C.3.2 Drop size C.3.3 Resistivity and pH value |
| 90 | Figure C.2 – Test Ra 2, recommended test apparatus for the drip box method |
| 91 | Annex D (informative) Guidance for test Rb D.1 General D.2 Example of test apparatus D.2.1 Method Rb 1: oscillating tube and spray nozzle |
| 92 | D.2.2 Method Rb 2: water jet Figure D.1 – Test Rb 1.1, recommended test apparatus for the oscillating tube method |
| 93 | D.2.3 Method Rb 3: fan jet nozzle |
| 94 | Figure D.2 – Distribution of mean value of precipitation intensity in the oscillating tube area |
| 95 | Figure D.3 – Test Rb 1.2, recommended test apparatus for the spray nozzle method Figure D.4 – Standard test nozzle for the water jet method (hose nozzle) |
| 96 | Figure D.5 – Standard test nozzle for the fan jet method Figure D.6 – Fan jet nozzle resulting dimensions of spraying hole for checking purpose |
| 97 | Figure D.7 – Example of different quality achievements of the surface finish of the fan jet nozzle |
| 98 | Figure D.8 – Set-up for measuring the impact force of the water jet for determining the protection against high-pressure and high-temperature water jets Figure D.9 – Impact force distribution |
| 99 | Figure D.10 – Test setup for determining the protection against high-pressure and high-temperature water jet for small enclosures |
| 100 | Annex E (informative) Guidance for test Rc E.1 General E.2 Example of test apparatus E.2.1 Method Rc 1: water tank E.2.2 Method Rc 2: pressurized water chamber E.3 Verification of test apparatus |
| 101 | Bibliography |
