1、CEN PREN*2591 (PART*CZL) 92 3404589 O026933 9 A. E, C. M .A. STAN DARD NORME A.E.C.M.A. A.E.C.M.A. NORM prEN 2591 Part C21 Issue P 1 June 1992 EDITE PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cdex - Tl
2、. (1) 47.36.98.76 UDC : Key words ENGLISH VERSION Aerospace series Elements of electrical and optical connection Test methods Part C21 - Damp heat, cyclic test Srie arospatiale Luft- und Raumfahrt Mthodes dessais Prfverfa hren Organes de connexion lectrique et optique Partie C21 - Chaleur humide, es
3、sai cyclique Elektrische und optische Verbindungselemente Teil C21 - Feuchte Wrme, zyklische Prfung This .Aerospace Series pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatia). It is published on green paper for the needs ofA
4、ECMA-Members. It has been technically approved by the experts of the concerned Commission followhg comment by the Member countries. Subsequent to the publication of this pre-standard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functiona
5、lly, without re-identification 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 fina
6、l vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199. tue Jean-Jacques Rousseau - 921 38 ISSY-LES-MDULINEAUX CEDEX Edition approved for publication Comments should be sent within six months after the date of publication decision Technopolis - 175, rue Jean-Jacques Rousseau
7、92138 Issy-les-Moulineaux Cdex - FRANCE 1992-06-05 A.E.C.M.A. C2 Chairman M. J. LE CUNFF CEN PREN*259L (PART*C21i) 92 = 3404589 O026934 O I prEN 2591-C21 Page 3 1 This standard specifies a method of assessing the ability of an element of connection to withstand a tropical atmosphere. It shall be use
8、d together with EN 2591. This test forms part of test EN 259 1 -C2 : Climatic sequence Scope and field of application . 2 References EN 2591 Aerospace series - Elements of electrical and optical connection - Test methods - General EN 2591-A1 Aerospace series - Elements of electrical and optical conn
9、ection - Test methods - Part Al - Visual examination 1) EN 259 1-66 Aerospace series - Elements of electrical and optical connection - Test methods - Part B6 - Measurement of insulation resistance 1) EN.2591-C2 Aerospace series - Elements of electrical and optical connection - Test methods - Part C2
10、 - Climatic sequence 2) EN 2591-D8 Aerospace series - Elements of electrical and optical connection - Test methods - Part 08 - Mating and unmating forces 2) 3 Preparation of specimens 3.1 The specimens shall be equipped with their normal accessories, mounted and wired according to the technical spec
11、ification. Cable ends shall be allowed through the chamber or sealed. The connectors shall be tested in the mated condition or unmated with protective cover. 3.2 Unless indicated in the technical specification, the following details shall be specified : - mated and unmated connectors with protective
12、 covers, - type of wire, - number of cycles : 10 or 2, - mounting and wiring definition, - requirements for final measurements. 1) in preparation at the date of publication of the present standard. 2) Published as AECMA pre-standard at the date of publication of the present standard. Previous page i
13、s blank L CEN PREN*259L (PARTwCZL) 92 3404589 002b935 2 B prEN 2591-C21 Page 4 4 Apparatus The test shall be carried out in a suitable test chamber providing for temperature and relative humidity monitoring in the working space. Damp air shall be circulated within the chamber. Arrangements shall be
14、made to avoid condensate from chamber walls or ceiling dripping on the specimens. 5 Method 5.1 Preconditioning Specimens shall be preconditioned for at least one hour unless otherwise specified by the technical specification. 5.2 Initial measurements (if applicable) They shall be performed as specif
15、ied by the technical specification. 5.3 Procedure Test specimens shall be placed in the chamber according to the technical specification. The test procedure shall consist of the following steps : Step 1 : in 2 h, the temperature of the cha+qer shall be raised to (65 * 3) OC and the relative humidity
16、 shall be increased to (95 -3 ) %. Step 2 : the above conditions shall be maintained for 6 h. Step 3 : in 16 h the temperature shall be progressively reduced to (38 o ).OC During this period, the relative humidity shall be maintained as high as possible and in no case shall drop below 85 %. These th
17、ree phases constitute one cycle. The number of cycles to be carried out shall be specified in the technical specification. +4 5.4 Final measurements (if applicable) The specimens shall be immediately subjected to the following tests : - EN 259 1 -B6 - Measurement of insulation resistance at ambient temperature, - EN 2591-D8 - Mating and unmating forces, - EN 2591 -Al - Visual examination with inspection for corrosion points.
