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  • BSI
    BS EN 3909:2016 Aerospace series. Test fluids and test methods for electrical and optical components and sub-assemblies
    Edition: 2016
    $266.02
    / user per year

Description of BS EN 3909:2016 2016

This standard specifies the list of test fluids to be used to demonstrate that components and sub-assemblies will not be adversely affected by contamination by fluids types that they may typically be exposed to.

The fluids listed are representative of those commonly used and encountered in airborne and ground operations, and align with the requirements of fluids susceptibility of ISO 7137. This shall not be considered an exhaustive list and additional test fluids may be instructed in the product standard, against which compliance needs to be demonstrated. This standard, when used in conjunction with the test requirements defined in Clause 6 or the product standard shall be considered the starting point to test a component to determine its minimum performance capability when exposed to the fluids listed.

Test results obtained from a number of sources over a considerable period of time have shown that, in many cases, widely varying results can be obtained when using fluids that are used in service. The practice of specifying fluids based on performance criteria rather than their constituents can mean variations in test results between batches of the fluid obtained from different manufacturers, or even from the same manufacturer.

For this reason the EN 3909 Standard recommends the use of "standard test fluids" which are specified by their constituents and contain the chemicals that may be found in commonly used fluids.

Where equipment may be exposed to fluid types that are not covered by Table 1 or where specific test fluids are considered to be necessary, the product standard shall identify the particular fluid required. If a manufacturer chooses to include additional test fluids (e.g. to satisfy a customer requirement), they do so at their own risk.



Standard NumberBS EN 3909:2016
TitleAerospace series. Test fluids and test methods for electrical and optical components and sub-assemblies
StatusConfirmed
Publication Date2016-06-30
ReplacesBS EN 3909:2007
Identical National Standard OfEN 3909:2016
DescriptorsTest equipment, Contamination, Aircraft components, Chemical-resistance tests, Working fluids, Electronic equipment and components, Liquids, Environmental testing, Electrical components
ICS49.060 Aerospace electric equipment and systems
CommitteeACE/6
ISBN978 0 580 90777 7
PublisherBSI
Pages14

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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