EN 3745-404:2019
(Main)Aerospace series - Fibres and cables, optical, aircraft use - Test methods - Part 404: Thermal shock
Aerospace series - Fibres and cables, optical, aircraft use - Test methods - Part 404: Thermal shock
This document specifies a method to determine the effects of thermal shock on an optical fibre or cable.
Luft- und Raumfahrt - Faseroptische Leitungen für Luftfahrzeuge - Prüfverfahren - Teil 404: Thermischer Schock
Dieses Dokument legt ein Verfahren zur Bestimmung der Auswirkungen von thermischem Schock auf Licht-wellenleiter oder Lichtwellenleiterkabel fest.
Série aérospatiale - Fibres et câbles optiques à usage aéronautique - Méthodes d'essais - Partie 404 : Choc thermique
Le présent document spécifie une méthode pour déterminer les effets d’un choc thermique sur une fibre ou un câble optique.
Aeronavtika - Optična vlakna in kabli za uporabo v zračnih plovilih - Preskusne metode - 404. del: Toplotni udar
Ta dokument določa metodo za določanje učinkov toplotnega udara na optično vlakno ali kabel.
General Information
Relations
Overview
EN 3745-404:2019 is a European standard developed by the Aerospace and Defence Industries Association of Europe (ASD-STAN) under CEN. It specifies a standardized test method for determining the effects of thermal shock on optical fibres and cables used in aerospace and aircraft applications. This method evaluates how rapid temperature changes impact the performance, especially attenuation, of optical fibres and cables designed for the challenging environments found in aerospace equipment.
Thermal shock testing is critical in ensuring the reliability and durability of optical communication components subjected to extreme temperature fluctuations during flight and in aerospace operations.
Key Topics
Scope of Testing
The standard defines a method to simulate thermal shocks by cycling specimens between specified high and low temperatures. This process replicates real-world aerospace environmental conditions.Specimen Preparation
Specimens must be conditioned to standard test conditions for 24 hours before testing. Parameters such as temperature range, humidity, number of cycles, and coil diameter are specified.Test Apparatus
The test requires:- A temperature-controlled oven for the high-temperature phase
- A cold chamber with temperature control within ±2 °C for the low-temperature phase
- Light Launch System (LLS) and Light Detector System (LDS) to measure optical attenuation continuously or discretely
- Optional humidity control devices
Test Methods
Two methods are outlined based on product requirements:- Method A (Discrete): Measure attenuation after each thermal shock cycle (default method).
- Method B (Continuous): Measure attenuation continuously at intervals during cycles if required by the product standard.
Measurement and Evaluation
After cycling (usually four cycles or as specified), attenuation must be assessed against maximum allowable variation limits. A visual examination per EN 3745-201 is also required to detect physical damage or degradation.
Applications
The EN 3745-404:2019 standard is essential for aerospace manufacturers, suppliers, and quality assurance engineers involved in:
- Designing and qualifying optical fibre cables for aircraft systems
- Verifying the thermal robustness of fibres used in harsh aerospace environments
- Ensuring compliance of optical components with aerospace safety and reliability requirements
- Supporting certification processes for optical equipment in aviation and space systems
- Developing new fibre optic materials and cable designs resistant to thermal shock
By implementing this test method, aerospace organizations can minimize the risk of signal transmission failure or cable damage due to sudden temperature variations encountered during flights, thus increasing system safety and longevity.
Related Standards
This standard forms part of the wider EN 3745 series covering optical fibres and cables for aircraft use, complementing other key documents:
- EN 3745-100: General test methods for aerospace fibres and cables
- EN 3745-201: Visual examination of fibres and cables
- EN 3745-301: Attenuation test methods for optical fibres and cables in aerospace
- EN 2591-100: Test methods for electrical and optical connection elements
Together, these standards provide a comprehensive framework for testing, evaluating, and qualifying optical fibre and cable components used in demanding aerospace environments.
Keywords: EN 3745-404:2019, aerospace optical fibres, thermal shock test, aircraft cables, optical fibre test methods, attenuation measurement, aerospace cable standards, fibre optic durability, thermal cycling aerospace, optical cable testing.
Frequently Asked Questions
EN 3745-404:2019 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Fibres and cables, optical, aircraft use - Test methods - Part 404: Thermal shock". This standard covers: This document specifies a method to determine the effects of thermal shock on an optical fibre or cable.
This document specifies a method to determine the effects of thermal shock on an optical fibre or cable.
EN 3745-404:2019 is classified under the following ICS (International Classification for Standards) categories: 49.060 - Aerospace electric equipment and systems; 49.090 - On-board equipment and instruments. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 3745-404:2019 has the following relationships with other standards: It is inter standard links to EN 3745-404:2005, prEN 3745. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 3745-404:2019 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2019
Nadomešča:
SIST EN 3745-404:2006
Aeronavtika - Optična vlakna in kabli za uporabo v zračnih plovilih - Preskusne
metode - 404. del: Toplotni udar
Aerospace series - Fibres and cables, optical, aircraft use - Test methods - Part 404:
Thermal shock
Luft- und Raumfahrt - Faseroptische Leitungen für Luftfahrzeuge - Prüfverfahren - Teil
404: Thermischer Schock
Série aérospatiale Fibres et câbles optiques à usage aéronautique Méthodes d'essais
Partie 404 : Choc thermique
Ta slovenski standard je istoveten z: EN 3745-404:2019
ICS:
33.180.10 (Optična) vlakna in kabli Fibres and cables
49.060 Letalska in vesoljska Aerospace electric
električna oprema in sistemi equipment and systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 3745-404
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2019
EUROPÄISCHE NORM
ICS 49.090 Supersedes EN 3745-404:2005
English Version
Aerospace series - Fibres and cables, optical, aircraft use -
Test methods - Part 404: Part 404: Thermal shock
Série aérospatiale - Fibres et câbles optiques à usage Luft- und Raumfahrt - Faseroptische Leitungen für
aéronautique - Méthodes d'essais - Partie 404 : Partie Luftfahrzeuge - Prüfverfahren - Teil 404: Teil 404:
404 : Choc thermique Thermischer Schock
This European Standard was approved by CEN on 14 July 2019.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3745-404:2019 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Preparation of specimens . 4
5 Apparatus. 5
6 Method . 5
European foreword
This document (EN 3745-404:2019) 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
...
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