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1.1 This test method establishes procedures for the hosedown of a membrane switch to verify adequate protection from ingress of water from a high-volume water spray.

1.2 This test method can also be used to verify the ability of a membrane switch or graphics layer to act as a liquid seal for a finished product.

1.3 Additional test methods or practices can be incorporated to investigate specific results or capabilities.

1.4 This test method is a modification of NEMA Publication Number 250-2008 Section 6.7 which is a test for hosedown of a finished product housing.

4.1 The presence of water inside a membrane switch can affect its mechanical operation or electrical functionality, or both.

4.2 This practice establishes a procedure to verify the ability of a membrane switch to resist the entry of liquid into itself or a finished product, or both. It is useful in identifying design deficiencies.

4.3 Hosedown testing may be destructive, therefore any samples tested should be considered unfit for future use.