1、CENELEC EN*l181000 94 = 3404583 01495bL 278 BRITISH STANDARD Harmonized system of quality assessment for electronic components Generic specification Fibre optic branching devices The European Standard EN 181000 : 1994 has the status of a British Standard BS EN 181 : 1995 CENELEC EN*381000 94 3404583
2、 0349562 304 = Amd. No. O BSI 1996 BS EN 181000 : 1995 Date Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to %chnical Committee EPL/86, Fibre optics, upon which the following bodies were represented: BECCAMA (BEAMA Electrical Ca
3、ble and Conductor Accessory Manufacturers British Approvals Service for Cables British Cable Makers Confederation Department of Trade and Industry (National Physical Laboratory) ERA Technology Ltd. Federation of the Electronics Industry Fibreoptic Industry Association (FIA) Ministry of Defence Natio
4、nal Supervising Inspectorate - BSI QA Society of Cable %levision Engineers Association) The following BSI references relate to the work on this standard: Committee reference EPL86 Special announcement in BSI News September 1994 ISBN O 680 23752 4 CENELEC EN*ame as group 2 of the qualification test s
5、equence 3rouD D Repeat all of the qualification test sequence CENELEC EN*i C2 Same as group 2 of the qualification test sequence Grouz, D Repeat all of the qualification test sequence Graphical and letter symbols shall, whenever possible, be taken from IEC 27 and 617. CENELEC EN*383000 94 3404583 03
6、49586 648 Page 22 EN 181ooO : 1994 2.3.2 Specification system This specification is part of a three level CECC specification system. Subsidiary specifications shall consist of BDS and DS. This system is shown in Table 4. TABLE 4 TREE LEVEL CECC SPECIFICATION STRUCTURE Specification level Basic ;ener
7、ic 3lank detail letail Examples of Information to be included Assessment system rules inspection rules Environmental test methods Sampling plans Identification rule Marking standards Dimensional standards Termilogy standards Symbol standards Preferred number series Si units Specific terminology Spec
8、ific symbols Specific units Preferred values Marking Quality assessment procedures Test and measurement methods Selection of tests Qualification approval and/or Capability approval procedures Quality conformance test s chedu 1 e inspection requirements information common to a number of types Individ
9、ual values Specific information Completed quality conformance test schedules Applicable to Two or more component families or sub-families Component family Groups of types having a common test schedule Individual type - CENELEC EN*383000 94 3404583 0349587 584 Page 23 EN 181000 : 1994 Blank detail sp
10、ecifications BDSs are not, by themselves, a specification level. There can be more than one BDS to specify different usage applications. Each BDS shall contain the preferred format for stating the required information in the DS. Detail specifications DSs shall specify the following as a minimum: - t
11、he type (see 2.1.1); - the styles (see 2.1.2); - the variants (see 2.1.3); - the climatic category (see 2.1.4); - the assessment level (see 2.1.5); - the qualification procedure method (see 3.3); - the part identification number for each variant - the mandatory test sequence (see 2.2); - the perform
12、ance requirements (see 2.6). (see 2.7.1); 2.3.3 Drawings The drawings and dimensions given in DSs shall not restrict details of construction nor shall be used as manufacturing drawings. projection system Either first angle or third angle projection shall be used for the drawings in documents covered
13、 by this specification. All drawings within a document shall use the same projection system and the drawings shall state which system is used. Dimensional system All dimensions shall be given in accordance with IS0 129, IS0 Recommendation 286 and IS0 1101. The metric system shall be used in BDSs and
14、 DSs. Dimensions shall not contain more than five significant digits. Intermountability The dimensional limits of tolerance (maximum and/or minimum) for the dimensions necessary to the mounting shall be defined in the DS. These limits are intended to ensure but not guarantee interchangeability of br
15、anching devices. CENELEC EN*181000 94 3404583 0149588 410 Page 24 EN 181000 : 1994 2.3.4 Measurements Measurement method The size measurement method to be used shall be specified in the relevant specification for dimensions which are specified within a total tolerance zone of 0,Ol mm or less (see An
16、nex B) . Reference components Reference components, if required, shall be specified in the relevant specification. Gauges Gauges, if required, shall be specified in the relevant specification. 2.3.5 Test data sheets Test data sheets shall be prepared for each test conducted to a DS. The data sheets
17、shall be included in the qualification report (see 3.3.8) and in the Periodic Inspection Report (see 3.4.2.). Data sheets shall contain the following information as a minimum: - title of test and date; - specimen description including the type of fibre. The description shall also include the variant
18、 identification number (see 2.7.1); - test equipment used and date of latest calibration; - all applicable test details; - all measurement values and observations; - sufficiently detailed documentation to provide traceable information for failure analysis (see 3.3.6 and 3.4.2.). 2.3.6 Instructions f
19、or use Instructions for use shall be given when required by the manufacturer and shall consist of: - assembly and termination instructions; - cleaning method as necessary; - additional information as necessary. CENELEC EN*:L8L000 94 3404583 0349589 357 = Page 25 EN 181000 : 1994 2.4 Design and const
20、ruction 2.4.1 Materials Corrosion resistance All materials used in the construction of branching devices shall be corrosion resistant or suitably finished to meet the requirements of the DS. Non flammable materials When non-flammable materials are required, the requirement shall be specified in the
21、relevant specification and, IEC 695-2-2 shall be referenced. 2.4.2 Workmanship Components and associated hardware shall be manufactured to a uniform quality and shall be free of sharp edges, burrs or other defects that will affect life, serviceability or appearance. Particular attention shall be giv
22、en to neatness and thoroughness of marking, plating, soldering, bonding, etc. 2.5 Quality Branching devices shall be controlled by the quality assessment procedures of Section 3. The measurement and test procedures of Section 4 shall be used, as applicable, for quality assessment. 2.6 Performance re
23、quirements Branching devices shall meet the performance requirements specified in the DS. 2.7 Identification and marking Components, associated hardware and packages shall be permanently and legibly identified and marked when required by the DS. 2.7.1 Variant identification number Each variant in a
24、DS shall be assigned a unique identification number. This number shall be set out as follows (see example): CENELEC EN*L8L000 74 3404583 OLLI9590 079 Page 26 EN 181000 : 1994 - BDs number; - three digit numbers, This number shall be allocated sequentially except for working group prepared DS(s) wher
25、e the first digit shall be “8“; - the variant number with a letter allocated in the DS followed by a two digit number allocated sequentially to individual variants; - letter indicating assessment level. EXAMPLE : CECC 81 101 -802 -A01 -A Three digits number Variant letter number Assessment level 2.7
26、.2 Component marking 2.7.3 Component marking, if required when possible, shall be specified in the DS. The preferred order of marking is: 1) manufacturers identification mark; 2) manufacturing date code; 3) manufacturers part number; 4) variant identification number. Package marking Package marking,
27、 if required, shall be specified in the DS. The preferred order of marking is: 1) manufacturers identification mark; 2) manufacturers part number; 3) manufacturing date code (year/week, see IS0 2015); 4) variant letter number(s) (see 2.7.1); 5) the type designation (see 2.1.1); 6) the assessment level; 7) any additional marking required by the relevant specification. When applicable, individual unit packages (within the sealed package) shall be marked with the reference number of the certified record of released lots, the manufacturers factory identity code and the component identification.
