1、BSI Standards PublicationBS EN 16602-70-18:2014Space product assurance Preparation, assembly andmounting of RF coaxial cablesBS EN 16602-70-18:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN16602-70-18:2014.The UK participation in its preparation was entrus
2、ted to TechnicalCommittee ACE/68, Space systems and operations.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. Th
3、e British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 84593 2ICS 49.090; 49.140Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on
4、 30 November 2014.Amendments issued since publicationDate Text affectedBS EN 16602-70-18:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16602-70-18 October 2014 ICS 49.090; 49.140 English version Space product assurance - Preparation, assembly and mounting of RF coaxial cables Assurance pr
5、oduit des projets spatiaux - Prparation, assemblage et montage des cbles radiofrquence coaxiaux Raumfahrtproduktsicherung - Vorbereitung, Zusammenbau und Befestigung von RF-Koaxial-Kabeln This European Standard was approved by CEN on 11 April 2014. CEN and CENELEC members are bound to comply with th
6、e 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-CENELEC Managemen
7、t Centre or to any CEN and CENELEC 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 and CENELEC member into its own language and notified to the CEN-CENELEC Management Cen
8、tre has the same status as the official versions. CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Gree
9、ce, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN/CENELEC All rights of explo
10、itation in any form and by any means reserved worldwide for CEN national Members and for CENELEC Members. Ref. No. EN 16602-70-18:2014 EBS EN 16602-70-18:2014EN 16602-70-18:2014 (E) 2 Table of contents Foreword 5 Introduction 6 1 Scope . 7 2 Normative references . 8 3 Terms, definitions and abbrevia
11、ted terms 9 3.1 Terms from other standards 9 3.2 Terms specific to the present standard . 9 3.3 Abbreviated terms. 9 4 Principles and prerequisites of reliable soldered or crimped cable connections . 10 4.1 Principles of reliable soldered or crimped semi-rigid cable connections 10 4.2 Prerequisites
12、for assembly and mounting of semi-rigid coaxial cables 10 4.3 Alternative coaxial cable technologies 11 5 Requirements 12 5.1 Preparatory conditions 12 5.1.1 Facility cleanliness 12 5.1.2 Environmental conditions 12 5.1.3 Lighting requirements 13 5.1.4 Equipment and tools . 13 5.2 Material selection
13、 15 5.2.1 Solder . 15 5.2.2 Flux . 16 5.2.3 Solvents 16 5.2.4 Cable selection . 17 5.2.5 Connector selection 17 5.3 Preparation of semi-rigid cable . 18 5.3.1 General . 18 5.3.2 Inspection of cable 18 5.3.3 Cutting cable to initial oversize length . 18 BS EN 16602-70-18:2014EN 16602-70-18:2014 (E) 3
14、 5.3.4 Cable forming and minimum bend radius 18 5.3.5 Preconditioning heat treatment 19 5.3.6 Trimming cable to final length . 20 5.3.7 Stripping the cable ends 21 5.3.8 Inspection of stripped cable ends 21 5.4 Preparation for soldering assembly of semi-rigid cables . 22 5.4.1 General . 22 5.4.2 Deg
15、olding and pretinning 22 5.4.3 Solder preforms 23 5.5 Assembly of connectors to RF coaxial cables . 24 5.5.1 Solder assembly of semi-rigid cables 24 5.5.2 Crimp assembly of semi-rigid cables and other assembly techniques . 28 5.5.3 Completed assemblies 28 5.6 Mounting of cables 29 5.6.1 Semi-rigid c
16、ables with straight solder-type connectors 29 5.6.2 Semi-rigid cables with right-angle connectors . 30 5.6.3 Other cable mounting technologies . 30 5.7 Process verification . 31 5.7.1 General . 31 5.7.2 Temperature cycling 31 5.7.3 Vibration 31 5.8 Quality assurance . 31 5.8.1 Data 31 5.8.2 Nonconfo
17、rmance . 32 5.8.3 Calibration . 32 5.8.4 Traceability . 32 5.8.5 Workmanship standards 32 5.8.6 Inspection . 32 5.8.7 Operator and inspector training and certification . 33 Annex A (normative) Logbook DRD . 34 A.1 DRD identification . 34 A.1.1 Requirement identification and source document 34 A.1.2
18、Purpose and objective . 34 A.2 Expected response . 34 A.2.1 Scope and content 34 A.2.2 Special remarks 34 Annex B (normative) Workmanship standards 35 BS EN 16602-70-18:2014EN 16602-70-18:2014 (E) 4 B.1 Overview 35 B.2 Illustrations . 35 Annex C (informative) Graphical information . 37 C.1 Overview
19、37 C.2 Typical cable cut-off fixture . 37 C.3 Typical cable-forming tool . 38 C.4 Approved and non-approved straight solder-type cable-end connectors . 39 C.5 Method of producing solder performs 40 C.6 Centre contact assembly 40 Bibliography . 41 Figures Figure B-1 : Photograph showing non-captive n
20、ut and preferred solder fillet 35 Figure B-2 : Microsection through preferred solder fillet, revealing full penetration of solder path . 35 Figure B-3 : Unacceptable solder fillet dimensions . 36 Figure C-1 : Typical cable cut-off fixture . 37 Figure C-2 : Typical cable-forming tool . 38 Figure C-3
21、: Approved and non-approved straight solder-type cable-end connectors . 39 Figure C-4 : Method of producing solder preforms 40 Figure C-5 : Centre contact assembly 40 Tables Table 5-1: Design rules for minimum bend radius . 19 Table 5-2: Preconditioning heat treatment process . 20 BS EN 16602-70-18:
22、2014EN 16602-70-18:2014 (E) 5 Foreword This document (EN 16602-70-18:2014) has been prepared by Technical Committee CEN/CLC/TC 5 “Space”, the secretariat of which is held by DIN. This standard (EN 16602-70-18:2014) originates from ECSS-Q-ST-70-18C. This European Standard shall be given the status of
23、 a national standard, either by publication of an identical text or by endorsement, at the latest by April 2015, and conflicting national standards shall be withdrawn at the latest by April 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of p
24、atent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This document has been developed to cover specifically space
25、systems and has therefore precedence over any EN covering the same scope but with a wider domain of applicability (e.g. : aerospace). According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Aust
26、ria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Swede
27、n, Switzerland, Turkey and the United Kingdom. BS EN 16602-70-18:2014EN 16602-70-18:2014 (E) 6 Introduction The main part of this Standard is based on industrial experience and recommendations from European soldering technology experts. Modifications are incorporated into the text to provide for the
28、 specific requirement of low-outgassing electrical systems which are required by scientific and application satellites. Other additions were made in the light of recent technological advances and results of metallurgical test programmes. The use of processes other than solder assembly is recognized,
29、 but only certain general requirements are given in this Standard. These requirements apply to assemblies designed to operate within the temperature limits from -45 C to +85 C. More extreme temperatures or other unusual environmental applications require special design measures or processing steps t
30、o provide environmental survival capability. BS EN 16602-70-18:2014EN 16602-70-18:2014 (E) 7 1 Scope This Standard defines the technical requirements and quality assurance provisions for the assembly and mounting of high-reliability, radio-frequency (RF) coaxial-cable interconnections for use as tra
31、nsmission lines in spacecraft and associated equipment. In general, these assemblies are designed for low-loss, stable operation from the relatively low frequencies through the higher frequencies in the microwave regions. These transmission-line cables should not be confused with low-frequency cable
32、s with conductive sheaths (usually copper braid), which are used in applications where shielding of the centre conductors from the surrounding electrical ambient is required. The interconnection of those shielded cables, not covered by the present standard, is covered in ECSS-Q-ST-70-08. This standa
33、rd may be tailored for the specific characteristics and constrains of a space project in conformance with ECSS-S-ST-00. BS EN 16602-70-18:2014EN 16602-70-18:2014 (E) 8 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provis
34、ions of this ECSS Standard. For dated references, subsequent amendments to, or revision of any of these publications do not apply, However, parties to agreements based on this ECSS Standard are encouraged to investigate the possibility of applying the more recent editions of the normative documents
35、indicated below. For undated references, the latest edition of the publication referred to applies. EN reference Reference in text Title EN 16601-00-01 ECSS-S-ST-00-01 ECSS system Glossary of terms EN 16602-10-09 ECSS-Q-ST-10-09 Space product assurance Nonconformance control system EN 16602-20 ECSS-
36、Q-ST-20 Space product assurance Quality assurance EN 16602-60 ECSS-Q-ST-60 Space product assurance Electrical, electronic and electromechanical (EEE) components EN 16602-70-02 ECSS-Q-ST-70-02 Space product assurance Thermal vacuum outgassing test for the screening of space materials EN 16602-70-08 E
37、CSS-Q-ST-70-08 Space product assurance Manual soldering of high-reliability electrical connections EN 16602-70-26 ECSS-Q-ST-70-26 Space product assurance Crimping of high-reliability electrical connections EN 16602-70-28 ECSS-Q-ST-70-28 Space product assurance Repair and modification of printed circ
38、uit board assemblies MIL-C-17G(3) SUP1 General specification for cables, radio frequency, flexible and semi-rigid. (8 Jan 1996) BS EN 16602-70-18:2014EN 16602-70-18:2014 (E) 9 3 Terms, definitions and abbreviated terms 3.1 Terms from other standards For the purpose of this Standard, the terms and de
39、finitions from ECSS-S-ST-00-01 apply, in particular for the following terms: requirement 3.2 Terms specific to the present standard 3.2.1 minimum bend radius inside radius of the bend measured on the outer surface of the cable 3.3 Abbreviated terms For the purpose of this Standard, the abbreviated t
40、erms from ECSS-S-ST-00-01 and the following apply: Abbreviation Meaning FEP fluorinated ethylene propylene PTFE polytetrafluoroethylene SMA sub miniature version A VSWR voltage standing wave ratio BS EN 16602-70-18:2014EN 16602-70-18:2014 (E) 10 4 Principles and prerequisites of reliable soldered or
41、 crimped cable connections 4.1 Principles of reliable soldered or crimped semi-rigid cable connections Reliable soldered or crimped connections result from proper design, control of tools, materials and work environments and careful workmanship. The basic design concepts, adherence to which ensures
42、reliable connections and prevents joint failure, are: a. Avoidance of dimensional mismatch between the coaxial-cable assembly and the units being connected; i.e. not forcing the semi-rigid cable assembly into position and thereby cracking or pre-stressing one of the joints. b. Use of cable-end conne
43、ctors with retractable (non-captive) coupling nuts; after completion of mounting, the coaxial-cable assembly is not in a state of tension resulting from axial movement when the connectors are threaded together. c. Minimizing the internal stresses on the soldered or crimped connections resulting from
44、 exposure to thermal cycling. NOTE The thermal coefficient of expansion of the dielectric is about ten (10) times that of copper and in service this can introduce a tensile stress on the joint. d. The various assembly and mounting processes are covered by quality-control inspection steps. 4.2 Prereq
45、uisites for assembly and mounting of semi-rigid coaxial cables Each supplier maintains documented soldering or crimping programmes which meet the requirements of this Standard for the types of connections employed and the articles involved. The programmes include procedures for training, certificati
46、on, maintenance of certified status, recertification and revocation of certified status for soldering, crimping and inspection personnel. The supplier also prepares and has readily available workmanship standards consisting of BS EN 16602-70-18:2014EN 16602-70-18:2014 (E) 11 satisfactory work sample
47、s or visual aids which clearly illustrate the quality characteristics for all connections involved, including the applicable illustrations in Annex B of this Standard. Records are kept to provide identification between the finished product and the operator. Records are also maintained of the trainin
48、g, testing and certification status of assembly operators. Records are retained for at least one year, or longer if this is a specific requirement of the customers project. Equipment and tools are verified and calibrated periodically for proper operation, and records of tool calibration and verifica
49、tion are maintained (see clause 5.8). For soldering or crimping requirements not covered in this Standard, the supplier submits a process procedure including all pertinent quality requirements to the customers relevant project office for approval in accordance with ECSS-Q-ST-70. 4.3 Alternative coaxial cable technologies Alternative coaxial cable technologies are accepted for application in individual customer programmes following the completion of qualification and batch acceptance test programmes in accordance with clause 5.7. The precise test-programme and r
