Aerospace series - Elements of electrical and optical connection - Test methods - Part 228: Ferrule withdrawal force

This European Standard describes the procedure to measure the withdrawal force between the ferrule of an optical contact and the resilient alignment sleeve located inside the connector.
This method is suitable for use for resilient alignment sleeve qualification.
It shall be used together with EN 2591-100.

Luft- und Raumfahrt - Elektrische und optische Verbindungselemente - Prüfverfahren - Teil 228: Auszugskraft der Ferrule

Série aérospatiale - Organes de connexion électrique et optique - Méthodes d'essais - Partie 228 : Force d’extraction de la férule

Aeronavtika - Električni in optični spojni elementi - Preskusne metode - 228. del: Izvlečna sila tulke

Ta evropski standard opisuje postopke za merjenje izvlečne sile med tulko optičnega kontakta in prožno poravnalno obojko, nameščeno v priključku.
Ta metoda je primerna za uporabo za kvalifikacijo prožne poravnalne obojke.
Uporabljati ga je treba skupaj s standardom EN 2591-100.

General Information

Status
Published
Publication Date
16-Oct-2018
Withdrawal Date
29-Apr-2019
ICS
49.060 - Aerospace electric equipment and systems
 
49.090 - On-board equipment and instruments
Technical Committee
ASD-STAN - Aerospace
Drafting Committee
ASD-STAN/D 2/S 10 - Optical
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
17-Oct-2018
Completion Date
17-Oct-2018
Ref Project
SIST EN 2591-228:2018 - Aerospace series - Elements of electrical and optical connection - Test methods - Part 228: Ferrule withdrawal force

Overview

EN 2591-228:2018 is a CEN aerospace test method that specifies how to measure the ferrule withdrawal force between an optical contact ferrule and a resilient alignment sleeve inside an aerospace connector. Intended for resilient alignment sleeve qualification, this part must be used together with EN 2591-100 (general test conditions). The procedure quantifies the breakaway frictional force that affects optical contact and mating contact force in fibre‑optic connectors.

Key topics and technical requirements

  • Scope: Measures breakaway friction between ferrule and sleeve; suitable for qualification of resilient alignment sleeves.
  • Specimen preparation:
    • Test under standard conditions as defined in EN 2591-100.
    • Specimens and gauge pins must be perfectly clean and dry; wipe cleaning recommended (avoid moistening wipes; if moistening used, no alcohol).
    • Wear gloves to avoid grease contamination; precondition at 40 °C for 30 min if moistening was used, then return to ambient for at least 30 min.
  • Apparatus:
    • Force generator producing a continuously increasing force with a force gauge recording force vs displacement. Loading rates of ~100 mm/min are generally acceptable.
    • Test assembly with a flexible member to avoid bending loads.
    • Pair of gauge pins inserted to meet at the sleeve centre.
  • Gauge pin requirements (Zirconia sleeves):
    • Surface finish (Ra) and roundness controls, chamfer and diameter tolerances are specified in the standard or product specification.
  • Testing and calculation:
    • Zero indicator for assembly weight; apply continuously increasing force.
    • Remove nonlinear regions; use a linear area X (default 50%) of the measured range.
    • Withdrawal force formula: WF = (F3 + F4)/2 + (F3 − F4)/2X (reduces to WF = (3·F3 − F4)/2 if X = 50%).
    • Typical protocol: three measurements from both sleeve ends, discard outliers, use mean from the higher‑value end; 30 samples recommended for characterization.
  • Influencing factors (Annex A): pin gauge tolerance, apparatus alignment, crosshead velocity, system stiffness, cleaning, humidity and airflow.

Applications and who uses this standard

  • Intended users: aerospace connector designers, manufacturers, quality/qualification engineers, test laboratories, and suppliers of alignment sleeves and ferrules.
  • Practical uses: product qualification, incoming inspection, design validation, failure analysis, and acceptance testing to ensure reliable optical contact and low insertion loss in aerospace and defence optical connectors.

Related standards

  • EN 2591-100 (General test conditions)
  • IEC 61300-3-33 (telecom ferrule withdrawal force methods)
  • TIA/EIA 455-158
  • EN 60512-1 / IEC 60512-1 (general connector test methods)

Keywords: EN 2591-228:2018, ferrule withdrawal force, resilient alignment sleeve, aerospace connectors, optical contact, test method, gauge pin, connector qualification.

Frequently Asked Questions

EN 2591-228:2018 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Elements of electrical and optical connection - Test methods - Part 228: Ferrule withdrawal force". This standard covers: This European Standard describes the procedure to measure the withdrawal force between the ferrule of an optical contact and the resilient alignment sleeve located inside the connector. This method is suitable for use for resilient alignment sleeve qualification. It shall be used together with EN 2591-100.

This European Standard describes the procedure to measure the withdrawal force between the ferrule of an optical contact and the resilient alignment sleeve located inside the connector. This method is suitable for use for resilient alignment sleeve qualification. It shall be used together with EN 2591-100.

EN 2591-228:2018 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 2591-228:2018 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-december-2018
$HURQDYWLND(OHNWULþQLLQRSWLþQLVSRMQLHOHPHQWL3UHVNXVQHPHWRGHGHO
,]YOHþQDVLODWXONH
Aerospace series - Elements of electrical and optical connection - Test methods - Part
228: Ferrule withdrawal force
Luft- und Raumfaht - Elektrische und optische Verbindungselemente - Prüfverfahren -
Teil 228: Auszugskraft der Ferrule
Série aérospatiale - Organes de connexion électrique et optique - Méthodes d'essais -
Partie 228 : Force d’extraction de la férule
Ta slovenski standard je istoveten z: EN 2591-228:2018
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 2591-228
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2018
EUROPÄISCHE NORM
ICS 49.060; 49.090
English Version
Aerospace series - Elements of electrical and optical
connection - Test methods - Part 228: Ferrule withdrawal
force
Série aérospatiale - Organes de connexion électrique et Luft- und Raumfahrt - Elektrische und optische
optique - Méthodes d'essais - Partie 228 : Force Verbindungselemente - Prüfverfahren - Teil 228:
d'extraction de la férule Auszugskraft der Ferrule
This European Standard was approved by CEN on 2 March 2018.

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, 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2591-228:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 General description . 4
4 Preparation of specimens . 4
5 Apparatus. 5
6 Testing . 7
7 Calculation or interpretation of results . 8
Annex A (informative) Precaution, recommendation on the apparatus . 9

European foreword
This document (EN 2591-228:2018) 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 April 2019, and conflicting national standards shall be
withdrawn at the latest by April 2019.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
1 Scope
This European Standard describes the procedure to measure the withdrawal force between the ferrule
of an optical contact and the resilient alignment sleeve located inside the connector.
This method is suitable for use for resilient alignment sleeve qualification.
It shall be used together with EN 2591-100.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 2591-100, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 100: General
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 General description
The contact force between the mating ferrules in a fibre optic connector is th
...

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