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Scope

1.1 This practice 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 practice 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 practice is a modification of NEMA Publication Number 250-1991 Section 6.7 which is a test for hosedown of a finished product housing.

Significance and Use

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

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.

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

Keywords

hose down; membrane switch; water spray; ICS Number Code 31.220.20 (Switches)

To find similar documents by ASTM Volume:

10.04 (Electronics; Declarable Substances in Materials; 3D Imaging Systems)

To find similar documents by classification:

31.220.20 (Switches)

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