1、O e e O 1 Edition approved for publication 1993-06-30 CEN PREN*259L-F4 93 m 3404589 0046640 297 m Comments should be sent within six months after the date of publication to AECMA Technopolis - 175, rue Jean-Jacques Rousseau C2 Chairman Mr. Le Cunff AECMA STANDARD NORME AECMA AECMA NORM prEN 2591 -F4
2、 Edition P 1 June 1993 DIT PAR LASSOCIATION EUROPCENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 UDC : Descriptors : ENGLISH VERSION Aerospace series Elements of electrical and optical connection Tes
3、t methods Part F4 - Optical elements Cleaning capability of optical face Srie arospatiale Luft- und Raumfahrt Mthodes dessais Prf verfahren Organes de connexion lectrique et optique Partie F4 - Organes optiques Aptitude au nettoyage de la face optique Elektrische und optische Verbindungselernente Te
4、il F4 - Optische Elemente Reinigungsfhigkeit der optischen Flche This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). 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-identifi
6、cation of the standard. After examination and signature of the AECMA Standard Checking Centre INPSI 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. aecma 1993 CEN
7、PREN*2573-F4 73 m 3404589 0046643 123 m prEN 2591-F4 Page 3 1 Scope This standard specifies a method of assessing the cleaning capability of the optical faces of unmated connections when they have been exposed to contaminants. It shall be used together with EN 2591. 2 Normative references EN 2591 Ae
8、rospace series - Elements of electrical and optical connection - Test methods - General l) Aerospace series - Elements of electrical and optical connection - Test methods - Part CI5 - Fluid resistance 2, Aerospace series - Elements of electrical and optical connection - Test methods - Part FI - Opti
9、cal elements - Insertion loss 2, EN 2591-CI5 EN 2591-FI O 3 Preparation of specimens Unless indicated in the technical specification, the following details shall be specified : - - - - maximum value of insertion loss; cleaning products and cleaning method; type and length of cable/fibre; type of fue
10、ls and lubricants selected from EN 2591-CI 5. 4 Apparatus It shall comprise : - a Light Launch System (LLS) as defined in EN 2591; - a Light Detector System (LDS) as defined in EN 2591; - vessels appropriate to contain the contaminants and standardized cleaning agents. 5 Method 5.1 - demineralized w
11、ater; - fuels; - liquid lubricants; - - - The following contaminants at ambient temperature shall be used : natural silica : grains of 2,5 ,um to 50 ,um and grains of 50,um to 150pm (50/50 by volume); mixture of water and silica (50/50 by volume); liquid lubricants and silica (50/50 by volume). Prev
12、ious page is blank 1) At the date of publication of this standard, general aspects of elements of optical connection are covered by a draft amendment which is in preparation to the European Standard EN 2591. 2) Published as AECMA Prectandard at the date of publication of this standard. O CEN PREN*25
13、9L-F4 93 3404589 004bb42 ObT prEN 2591-F4 Page 4 5.2 above : The following operations shall be performed separately for each of the contaminants defined - - - - measure initial insertion loss (EN 2591-Fl); immerse the optical face of the connection elements in each contaminant; clean the connection elements according to EN 2591; mate the optical connection elements. 5.3 Final measurement and requirements - EN 2591-FI - Insertion loss
