1、.- .- - CEN:PREN*3475 (PART*703) 92 m 3404589 0033507 b2T W Edition approved for publication 1992-08-31 A. E. C. M. A. STAN DARD NORME A.E.C.M.A. A.E.C.M.A. NORM prEN 3475 Part 703 Issue P 1 August 1992 EDITE PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATERIEL AEPOSPATIAL Technopolis - 175 rue
2、 Jean-Jacques Rousseaii - F-92138 Issy-ies-Mouineabx Ceaex - Tel 5 I J7 36 38 76 Comments should be sent within six months C2 Chairman after the date of publication decision AECMA Teclinopolts - 175, rue Jean-Jacques Rousseau 921 38 Issy-les-Moui:neaux Cedex - FRANCE M. J. LE CUNFF I UDC : Key words
3、 ENGLISH VERSION Aerospace series Cables, electrical, aircraft use Test methods Part 703 - Permanence of manufacturers marking Srie arospatiale Luft- und Raumfahrt Cbles lectriques Elektrischen Leitungen Mthodes dessais Prfverf a hren usage aronautique Partie 703 - Tenue du marquage fabricant fr Luf
4、tfahrt Verwendung Teil 703 - Haltbarkeit der Herstellerkennzeichnung This .Aerospace Series. pre-standard 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 te
5、chnically approved b y the experts of the concerned Commission following 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 functionally, without re-identifica
6、tion of the standard. After examination and signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the OfficialServices of the Member countries it willbe submitted as a draft European Standard to CEN (European Committee for Standardization) for final vote. CEN PRENr3LI75 (PART
7、*703) 72 W 3404587 0033508 5bb prEN 3475-703 Page 3 1 Scope and field of application This standard specifies a method of testing the permanence of the manufacturers marking on finished cables. It shall be used together with EN 3475-100. 2 References EN 3475-100 Aerospace series - Cables, electrical,
8、 aircraft use - Test methods - Part 100 - General 1) 3 Preparation of specimens The specimens approximately 0,75 m long shall be taken from a finished cable and subject to a scrape abrasion test by a needle. The test shall be performed at ambient temperature. 4 Apparatus The apparatus (see figure 1)
9、 shall consist of a device designed to wear the surface of the identification mark upon the insulation or jacket, over a length equal to the travel (10 f 1) mm at a frequency of (55 f 5) cycles/min. Mass -? .Travel (1021) mm _ Mechanism Electrical insulation Needle holder Counter mass I Anvil (low t
10、hermal mass) Cable . on test I Figure 1 - General arrangement 1) Published as AECMA pre-standard at the date of publication of the present standard. Previous page is blank prEN 3475-703 Page 4 5 Method A specimen shall be fixed on the abrasion test device with the marking on the upper surface. The l
11、oad on the abrading needle shall be 1,5 N. The diameter of the needle shall be (0,50 * 0,Ol) mm. Each specimen shall be subjected to 125 cycles. 6 Requirements Upon completion, the specimen shall be subjected to a visual inspection. A continuous line shall not be scored through .the printing which shall remain legible.
