1、STD-AECMA PREN 257L-b323-ENGL 1795 m 1012311 OOL1274 941 AECMA STANDARD prEN 2591 -6323 NORME AECMA Edition P 1 AECMA NORM December 7 995 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - B-1200 BRUXELLES - Tel. (32) 2 775 81 10 - Fax. (32) 2 775 81 11 ICs : 49.06
2、0 Descriptors : Edition approved for publication 1995-1 2-29 ENGLISH VERSION C2 Chairman M. Pezzetta Comments should be sent within six months after the date of publication to AECMA Gulledelle 94 B-1200 BRUXELLES Aerospace series Elements of electrical and optical connection Test methods Part 6323 :
3、 Optical elements Thermal shock (Hermetically sealed devices) Srie arospatiale Organes de connexion lectrique et optique Mthodes dessais Partie 6323 : Organes optiques Chocs thermiques (Organes de connexion hermtiques) Luft- und Raumfahrt Elektrische und optische Verbindungselemente Prfverfahren Tei
4、l 6323 : Optische Elemente Thermischer Schock (fr hermetische Steckverbinder) This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on green paper for the needs of AECMA-Members. It has been technic
5、ally approved by the experts of the concerned Technical Committee following comment by the Member countries. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re- identif
6、ication of the standard. After examination and signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Copyright Asso
7、ciation Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 3 prEN 2591-6323 : 1995 1 Scope This standard specifies a method of verifying the ability of optical connection
8、elements, with a hermetic sealing element to sustain thermal shock. It shall be used together with EN 2591. 2 Normative references EN 2591 Aerospace series - Elements of electrical and optical connection - Test methods - General 1 ) Aerospace series - Elements of electrical and optical connection -
9、Test methods - Part 323 : Thermal shock 2) Aerospace series - Elements of electrical and optical connection - Test methods - Part 601 : Insertion loss 2) Aerospace series - Elements of electrical and optical connection - Test methods - Part 6101 : Visual examination 2) EN 2591-323 EN 2591-601 EN 259
10、1-6101 3 Preparation of specimens 3.1 Specimens shall be fitted with the accessories and terminated as specified. 3.2 Unless otherwise specified in the technical specification, the following details shall be stated : See EN 2591-323 (if applicable) plus : - type and length of cable/fibre; - maximum
11、value of insertion loss; - number of specimens. 4 Apparatus As in EN 2591-323 1) To cover the general aspects of elements of optical connection a new edition of EN 2591, now EN 2591-100, is in preparation at the date of publication of this standard. 2) Published as AECMA Prestandard at the date of p
12、ublication of this standard Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 4 prEN 2591-6323 : 1995 5 Method 5.1 Initial measurements They shall b
13、e carried out as specified, plus EN 2591-601. 5.2 Procedure The specimen, at initial temperature, shall be immersed in the centre of the containers in accordance with the cycle defined in figure 1. Ambient e-c tl - 3 A start of first cycle 1 cycle 2 Figure 1 m t The time of immersion in the water at
14、 each of the two temperatures shall be tl = (IO f 1) s and t2 in accordance with EN 2591-323 ( 5 s). The number of cycles shall be IO. 5.3 Recovery See EN 2591-323 5.4 Final measurements (if applicable) The specimen shall be subjected to the following test sequence : - EN 2591-323 - EN 2591-601 - EN 2591-6101 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
