EN 4650:2010

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Luft- und Raumfahrt - Leitungs- und Kabelkennzeichnungsverfahren durch UV LaserSérie aérospatiale - Procédé de marquage des fils et câbles par laser UVAerospace series - Wire and cable marking process, UV Laser49.060Aerospace electric equipment and systemsICS:Ta slovenski standard je istoveten z:EN 4650:2010SIST EN 4650:2010en01-junij-2010SIST EN 4650:2010SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4650
April 2010 ICS 49.060 English Version
Aerospace series - Wire and cable marking process, UV Laser Série aérospatiale - Procédé de marquage des fils et câbles par laser UV
Luft- und Raumfahrt - Leitungs- und Kabelkennzeichnungsverfahren durch UV Laser This European Standard was approved by CEN on 6 February 2010.
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 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 Management Centre has the same status as the official versions.
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Cables, electrical, aircraft use
Test methods
Part 100: General. Wiring specified as UV laser markable and which has been marked in accordance with this standard will conform to the requirements of EN 3838. 2 Normative references The following referenced documents are indispensable for the application 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 3475-100, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 100: General EN 3475-705, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 705: Contrast measurement EN 3475-706, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 706: Laser markability EN 3838, Aerospace series — Requirements and tests on user-applied markings on aircraft electrical cables 1) EN ISO 10012, Measurement management systems — Requirements for measurement processes and measuring equipment (ISO 10012:2003)
1) Published as ASD Prestandard at the date of publication of this standard. SIST EN 4650:2010

NOTE The laser is energized by means of an electrical discharge in a specialized mixture of rare gases and halogens. Excimer lasers are available operating at a number of discrete wavelengths throughout the UV, the most common of which are 193 nm, 248 nm, 308 nm and 351 nm. The wavelength is dependant only on the gas mix used; 308 nm is commonly used for UV laser wire marking. 3.2.6 fibre optic cable cable that is designed to transmit light waves between a light transmission source and a receiver
NOTE In signal applications, the transmitter and receiver include devices that are used to convert between optical and electronic pulses. Typical cables include a glass or plastic core, a layer of cladding having a lower refractive index to refract or totally reflect light inward at the core/cladding boundary, a buffer, strength members and jacketing to protect the inner cable from environmental damage. 3.2.7 fluence energy density, measured in joules per square centimetre (J/cm2), of a single pulse of the laser beam, which is at the surface of the wire insulation or cable jacket SIST EN 4650:2010

NOTE In the case of Nd lasers this results in a frequency doubled output at 532 nm in the green and a frequency tripled output at 355 nm in the UV, which is used for wire marking. 3.2.11 harness assembly of any number of wires, electrical/optical cables and/or groups and their terminations which is designed and fabricated so as to allow for installation and removal as a unit
NOTE A harness may be an open harness or a protected harness. 3.2.12 infrared
IR electromagnetic radiation in the wavelength range from approximately 700 nm to in excess of 10 000 nm 3.2.13 insulation outer polymer covering of an electrical wire or multi-conductor cable or fibre optic cable 3.2.14 IR laser laser that produces a beam of radiation in the IR range 3.2.15 jacket outer protective covering for a cable 3.2.16 laser laser is an acronym for Light Amplification by the Stimulated Emission of Radiation. Lasers are a source of intense monochromatic light in the ultraviolet, visible or infrared region of the spectrum. The "active" or lasing medium may be a solid, liquid or gas. The laser beam is generated by energizing the active medium using an external power source, which is most commonly electrical or optical 3.2.17 legibility properties of a mark that enable it to be easily and correctly read SIST EN 4650:2010

Nd elemental metal that forms the active laser material in the most common type of solid state laser
NOTE The neodymium is held in an optically transparent solid "host" material, and is energized by optical input, either from a flash lamp or from the optical output from a diode laser. The host material does not play a direct role, but can slightly influence the laser wavelength. Typical host materials are specialized crystal materials, such as Yttrium Aluminium Garnet (YAG), Yttrium Lithium Fluoride (YLF) and Yttrium Vanadate (YVO4). These lasers are commonly referred to as Nd:YAG, Nd:YLF and Nd:YVO4 respectively. The primary wavelength of Nd solid state lasers is in the infrared (IR) at a wavelength of approximately 1 064 nm. The IR output of such lasers can be conveniently reduced to lower wavelengths suitable for wire marking by use of harmonic generation. 3.2.22 pulse length time interval between the laser energy crossing half the maximum energy on the rising and the falling edges of the pulse; referred to as FWHM – full width half maximum
NOTE Pulse lengths are measured in nanoseconds (ns). 1 ns = 10-9 s. 3.2.23 purchaser activity that can issue a purchase order or contract 3.2.24 quality conformance tests performed on production samples at a specified frequency to ensure that the requirements of this standard are met 3.2.25 quality conformance inspection process that includes measurements, non-destructive tests, analysis, and associated data that will provide verification that a particular individual component continually conforms to the requirements defined in the standard 3.2.26 supplier original equipment manufacturer (OEM) or a value added manufacturer which has design and production control of the processes used to produce the final product in accordance with the standard 3.2.27 ultraviolet
UV electromagnetic radiation in the wavelength range from approximately 200 nm to 400 nm SIST EN 4650:2010

NOTE Verification Inspection includes definition of the measurements, tests, analysis, and associated data that provides consistent rationale for acceptance of a particular supplier's design as meeting the standard requirements typically prior to acquisition by the Purchaser. 3.2.30 wavelength
distance between repeating units of a wave pattern, e.g. the distance between the crest of one wave and the crest of an adjacent wave
NOTE 1 Laser wavelength is typically measured in nanometres (nm). NOTE 2
= c/f where
c
is the velocity of light;
f
is the frequency. 3.2.31 wire single metallic conductor of solid, stranded or tinsel construction, designed to carry current in an electric circuit, but not having a metallic covering, sheath or shield
NOTE For the purpose of this specification, "wire" refers to "insulated electric wire". 3.2.32 wire code wire circuit identification number or code assigned to a specific wire in a wire harness assembly and marked on the insulation surface 3.3 Symbols and abbreviations nm : nanometre, 10-9 m; ns : nanosecond 10-9 s; ETFE : ethylenetetrafluoroethylene; PFA : perfluoroalkoxy fluoropolymer; PTFE : polytetrafluoroethylene; PVDF : polyvinylidene difluoride / polyvinylidene fluoride. SIST EN 4650:2010
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