EN 3909:2016
(Main)Aerospace series - Test fluids and test methods for electrical and optical components and sub-assemblies
Aerospace series - Test fluids and test methods for electrical and optical components and sub-assemblies
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.
Luft- und Raumfahrt - Prüfflüssigkeiten und Prüfverfahren für elektrische und optische Bauelemente und Untergruppen
Diese Norm legt die Liste der einzusetzenden Prüfflüssigkeiten fest zum Nachweis, dass Bauelemente und Untergruppen nicht nachteilig durch Kontamination mittels Flüssigkeiten beeinflusst werden, denen sie üb¬licherweise ausgesetzt sein dürfen.
Die aufgeführten Flüssigkeiten sind charakteristisch für üblicherweise bei Luft und Bodenanwendungen eingesetzte und anzutreffende Flüssigkeiten und angepasst an die Anforderungen der ISO 7137 hinsichtlich der Beständigkeit gegen Flüssigkeiten. Diese Liste darf nicht als vollständig angesehen werden; in der Produktnorm dürfen zusätzliche Prüfflüssigkeiten festgelegt sein, gegen welche Einhaltung nachgewiesen werden muss. Diese Norm, wenn in Verbindung mit den in Abschnitt 6 oder den in der Produktnorm festge¬legten Prüfanforderungen angewendet, ist als Ausgangspunkt der Prüfung eines Bauelements zur Bestim¬mung seiner Mindestleistungsfähigkeit anzusehen, wenn es den aufgelisteten Flüssigkeiten ausgesetzt wird.
Prüfergebnisse, die aus einer Anzahl von Quellen über einen erheblichen Zeitraum gesammelt wurden, ergaben, dass in vielen Fällen unterschiedliche Ergebnisse erreicht werden können, wenn Flüssigkeiten aus dem Betrieb eingesetzt werden. Die Praktik des Festlegens von Flüssigkeiten basierend auf Leistungs-kriterien statt auf ihren Bestandteilen kann bedeuten, dass es zwischen Losen der Flüssigkeit, die von unter¬schied¬lichen Herstellern oder sogar vom gleichen Hersteller bezogen werden, Abweichungen hinsichtlich der Prüfergebnisse gibt.
Aus diesem Grund wird in der Norm EN 3909 der Einsatz von „genormten Prüfflüssigkeiten“ empfohlen, die durch ihre Bestandteile festgelegt sind und die die Chemikalien enthalten, die in üblicherweise eingesetzten Flüssigkeiten verwendet werden.
Wenn die Ausrüstung Flüssigkeiten ausgesetzt wird, die nicht in Tabelle 1 enthalten sind oder wenn zusätz¬liche Prüfflüssigkeiten als erforderlich angesehen werden, muss die Produktnorm diese geforderte, beson¬dere Flüssigkeit identifizieren. Wenn Hersteller sich dafür entscheiden, zusätzliche Prüfflüssigkeiten einzu¬beziehen (z. B. um eine Kundenanforderung zu erfüllen), geschieht dies auf eigenes Risiko.
Série aérospatiale - Fluides d'essais et méthodes d'essai pour composants et sous-ensembles électriques et optiques
Aeronavtika - Preskusne tekočine za električne in optične sestavne dele in njihove podsestave
Ta standard določa seznam preskusnih tekočin, ki se uporabljajo za prikaz tega, da onesnaženost z vrstami tekočin, ki so jim lahko običajno izpostavljeni sestavni deli in podsestavi, ne bo negativno vplivala na te dele in podsestave.
Navedene tekočine so tekočine, ki so običajno prisotne ali v uporabi pri izvajanju dejavnosti v zraku ali na tleh, in so skladne z zahtevami glede občutljivosti tekočin v standardu ISO 7137. Seznam se ne sme šteti za izčrpen, saj standard za proizvode lahko zahteva uporabo dodatnih preskusnih tekočin, pri čemer je treba dokazati skladnost s tem standardom. Ta standard je treba pri uporabi v povezavi z zahtevami glede preskušanja, opredeljenimi v točki 6 ali v standardu za proizvod, obravnavati kot izhodišče za preskus sestavnega dela, na podlagi katerega se določi njegova najmanjša zahtevana zmogljivost pri izpostavljenosti navedenim tekočinam.
Rezultati, pridobljeni iz več različnih virov v daljšem časovnem obdobju, so pokazali, da je mogoče v številnih primerih pri uporabi tekočin, ki se uporabljajo med obratovanjem, dobiti bistveno različne rezultate. Pri določanju tekočin na podlagi meril zmogljivosti namesto na podlagi njihovih sestavin je pri preskušanju kompletov tekočin različnih proizvajalcev (ali celo enega samega proizvajalca) mogoče dobiti različne rezultate.
Standard EN 3909 zato priporoča uporabo »standardnih preskusnih tekočin«, ki so določene na podlagi njihovih sestavin in vsebujejo kemikalije, ki se jih lahko najde v običajno uporabljanih tekočinah.
Kadar je oprema lahko izpostavljena vrstam tekočin, ki niso zajete v preglednici 1, ali je potrebna uporaba posebnih preskusnih tekočin, je treba posamezno zahtevano tekočino opredeliti v standardu za proizvod. Če proizvajalec po lastni presoji vključi dodatne preskusne tekočine (npr. na zahtevo stranke), to stori na lastno odgovornost.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2016
1DGRPHãþD
SIST EN 3909:2008
$HURQDYWLND3UHVNXVQHWHNRþLQH]DHOHNWULþQHLQRSWLþQHVHVWDYQHGHOHLQQMLKRYH
SRGVHVWDYH
Aerospace series - Test fluids for electrical and optical components and sub-assemblies
Luft- und Raumfahrt - Prüfflüssigkeiten für elektrische und optische Bauteile und
Untergruppen
Série aérospatiale - Fluides d'essais pour composants et sous-ensembles électriques et
optiques
Ta slovenski standard je istoveten z: EN 3909:2016
ICS:
49.060 /HWDOVNDLQYHVROMVND Aerospace electric
HOHNWULþQDRSUHPDLQVLVWHPL equipment and systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 3909
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2016
EUROPÄISCHE NORM
ICS 49.060 Supersedes EN 3909:2007
English Version
Aerospace series - Test fluids and test methods for
electrical and optical components and sub-assemblies
Série aérospatiale - Fluides d'essais et méthodes Luft- und Raumfahrt - Prüfflüssigkeiten und
d'essai pour composants et sous-ensembles électriques Prüfverfahren für elektrische und optische
et optiques Bauelemente und Untergruppen
This European Standard was approved by CEN on 27 September 2015.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3909:2016 E
worldwide for CEN national Members.
Contents Page
European Foreword . 3
1 Scope . 4
2 Normative references . 4
3 Test fluids . 5
4 Test samples . 5
5 Test procedures . 5
6 Test temperatures . 5
7 Health and safety . 6
8 Information to be supplied in the product standard . 6
9 List of test fluids . 6
10 General guidance . 9
European Foreword
This document (EN 3909:2016) has been prepared by the Aerospace and Defence Industries
Association of Europe - Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of
ASD, prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by November 2016, and conflicting national standards
shall be withdrawn at the latest by November 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN 3909:2007.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
1 Scope
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.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 2349-405, Aerospace series — Requirements and test procedures for relays and contactors —
Part 405: Fluid resistance
EN 2591-315, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 315: Fluid resistance
EN 3475-411, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 411: Resistance
to fluids
EN 3745-411, Aerospace series — Fibres and cables, optical, aircraft use — Test methods — Part 411:
Resistance to fluids
EN 3841-405, Aerospace series — Circuit breakers — Test methods — Part 405: Fluid resistance
EN 4057-303, Aerospace series — Cable ties for harnesses — Test methods — Part 303: Resistance to
fluids
ISO 1817, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids
ISO 7137, Aircraft — Environmental conditions and test procedures for airborne equipment
ISO 11075, Aircraft — De-icing/anti-icing fluids — ISO type I
ISO 11078, Aircraft — De-icing/anti-icing fluids — ISO types II, III and IV
1)
MIL-PRF-87937, Cleaning Compound, Aerospace Equipment
2)
AMS 1428G, Fluid, Aircraft Deicing/Anti-Icing, Non-Newtonian, (Pseudoplastic), SAE Types II, III, and IV
2)
AMS 1476B, Deodorant, Aircraft Toilet
1)
Published by: DoD National (US) Mil. Department of Defense (http://www.defenselink.mil/).
2)
Published by: SAE National (US) Society of Automotive Engineers (http://www.sae.org/).
2)
ASTM D740, Standard Specification for Methyl Ethyl Ketone
3 Test fluids
Unless specified in the relevant product standard, test specification or test method, all test fluids listed
in Table 1, of this standard, are mandatory.
To ensure the optimum performance of all the test fluids, the shelf life and storage conditions must be
maintained in accordance with the fluid manufacturer’s recommendations.
4 Test samples
The test sample shall be either, a component or an assembly, as specified in the test method and/or
product standard. The size and/or physical arrangement of each test sample or test assembly shall
enable complete sample immersion into the test fluid in accordance with the test procedure.
5 Test procedures
Unless otherwise stated in the product standard, the following component types shall be tested in
accordance with either; EN 2349-405 for relays and contactors, EN 2591-315 for electrical connectors
and accessories, EN 3475-411 for cables, EN 3745-411 for fibre optic components, EN 3841-405 for
circuit breakers or EN 4057-303 for cable ties, to confirm they are not susceptible to the fluids listed in
Table 1.
For any other types of components requiring testing using the fluids listed in Table 1, the appropriate
test procedures shall be as defined in the relevant product standard.
NOTE Unless otherwise specified in the product standard, the test specification shall control the complete
test procedure including instructions such as cleaning the test samples and the choice of cleaning fluids (this
should not result in further contamination).
6 Test temperatures
Test temperatures and flash point temperatures are as detailed in Table 1.
The test temperatures comprise a soak temperature in the test fluid; a conditioning period and a heat
soak stage in air. The samples shall be inspected at ambient after the 3 stage cycle(s) as required by the
product standard or technical specification.
The test temperatures listed in Table 1 comprise the recommended immersion fluid temperature
followed by the recommended oven circulated air temperature. E.G. A sample to be tested in test fluid
'Gasoline' to ISO 1817 Liquid B (test fluid ref 1a), shall be immersed for 15 min to 20 min at 40 °C in the
gasoline and removed. Stored for 7 h to 7,5 h at 23 °C. Placed in the oven for 16 h to 16,5 h at the
relevant third phase temperature (refer to the product standard technical specification or test
specification for the oven temperature).
7 Health and safety
It is the responsibility of the user to ensure all local and industrial health and safety requirements are
followed during and after the test program. i.e. storage, use and disposal of test fluids.
The relevant Material Safety Data Sheet shall be consulted to establish safe handling of each fluid listed
and tested. If there is any doubt the fluid supplier/manufacturer shall be consulted.
If the test temperature results in the fluid becoming a gas, the test authority shall determine the
applicability of the test and the test facility shall ensure all health and safety measures are adhered to.
8 Information to be supplied in the product standard
The following information shall be supplied in the product standard:
1 Test procedures/method(s) to be used;
2 The quantity and sizes (including styles, etc.) of test samples;
3 Any departures from the test fluids and/or test protocol listed in this standard and the test
procedure;
4 The test sample configuration (if not described by the relevant test procedure);
5 The pass/fail criteria for the characteristics under assessment.
Table 1 makes reference to a test fluid number. This reference may appear in the relevant test
instruction as a numeric or a numeric and alpha. The new test reference numbers have been adopted to
allow the selection of new fluids in accordance with changing environmental and business needs.
The old test fluid references shall not be used for test fluid call-up in new specifications. It is
recommended that, wherever practical the test fluid shall be referred to by its full name or specification.
9 List of test fluids
For test fluids refer Table 1.
The relevant Material Safety Data Sheet (and the fluid supplier/manufacturer if necessary) shall be
consulted to establish the characteristics and any special handling requirements associated with each
fluid listed and tested. This includes establishing if a fluid is conductive or not. The fluid manufacturer
shall be consulted if there are any doubts about a fluid or its characteristics.
Table 1 — List of test fluids
Test fluid Fluid Type Test fluid to be Fluid in service Test Flash
No. family used (for
...
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