IEC 60068-2-18:2017

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Survey of water tests
5 Test Ra: falling drops
6 Test Rb: impacting water
7 Test Rc: immersion
Annex A (informative) - Water characteristics to
        be considered when writing the relevant
        specification
Annex B (informative) - General guidance
Annex C (informative) - Guidance for test Ra
Annex D (informative) - Guidance for test Rb
Annex E (informative) - Guidance for test Rc
Bibliography

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.