1、BRITISH STANDARD AEROSPACE SERIES BS EN 2591-203:1996 Elements of electrical and optical connection Test methods Part 203: Electrical continuity at microvolt level The European Standard EN2591-203:1996 has the status of a British Standard ICS 49.060BSEN2591-203:1996 This British Standard, having bee
2、n prepared under the directionof the Engineering SectorBoard, was published underthe authority of the Standards Board and comes intoeffect on 15 June 1996 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference ACE/6 Draft for comment 92/84570 DC ISBN 0 580
3、25953 6 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACE/6, Aerospace avionic, electrical and fibre-optic technology, upon which the following bodies were represented: British Airways British Cable Makers Confederation
4、 British Rubber Manufacturers Association Civil Aviation Authority (Airworthiness Division) Federation of the Electronics Industry Ministry of Defence Society of British Aerospace Companies Amendments issued since publication Amd. No. Date CommentsBSEN2591-203:1996 BSI 11-1999 i Contents Page Commit
5、tees responsible Inside front cover National foreword ii Foreword 2 1 Scope 3 2 Normative references 3 3 Preparation of specimens 3 4 Apparatus 3 5 Method 3 Figure 1 3 List of references Inside back coverBSEN2591-203:1996 ii BSI 11-1999 National foreword This British Standard has been prepared by Te
6、chnical Committee ACE/6 and is the English language version of EN2591-203:1996 Aerospace series Elements of electrical and optical connection Test methods Part203: Electrical continuity at microvolt level, published by the European Committee for Standardization (CEN). It supersedes BSEN2591-B3:1994
7、which is withdrawn. BS EN 2591-203:1996 was produced as a result of international discussions in which the United Kingdom took an active part. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct appli
8、cation. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references Publication referred to Corresponding British Standard IEC (50) 302 BS 4727 Glossary of electrotechnical, power, telecommunication, electronics, lighting and colour terms Part 1 Ter
9、ms common to power, telecommunications and electronics Group 04:1986 Measurement terminology EN 2591 BS EN 2591:1992 Elements of electrical and optical connection. Test methods. General Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, the EN title page, pa
10、ges2 to4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2591-203 February 1996 ICS49.060
11、 Supersedes EN 2591-B3:1993 Descriptors: Aircraft industry, aircraft equipment, connecting equipment, tests, measurements, electrical resistance, contact resistance, tests duration English version Aerospace series Elements of electrical and optical connection Test methods Part 203: Electrical contin
12、uity at microvolt level Srie arospatiale Organes de connexion lectrique et optique Mthodes dessai Partie 203: Continuit lectrique au niveau des microvolts Luft- und Raumfahrt Elektrische und optische Verbindungselemente Prfverfahren Teil 203: Kontinuierlicher Stromdurchgang im Mikrovoltbereich This
13、European Standard was approved by CEN on 1993-12-16. 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 co
14、ncerning such national standards may be obtained on application to the Central Secretariat 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 o
15、wn language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerla
16、nd and UnitedKingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN 2591-203:1996 EEN2591-203:1996 BSI 11-1999 2 Foreword This Europe
17、an Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). The alphanumerical designation of the Parts of EN2591 has been abandoned for a numerical designation in line with the Internal Regulations of CEN/CENELEC. This European Standard is the integral reproduction
18、 of the European Standard EN2591-B3 after application of this decision, without any other modification than the change in numbering. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August1996, and
19、 conflicting national standards shall be withdrawn at the latest by August1996. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greec
20、e, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom.EN2591-203:1996 BSI 11-1999 3 1 Scope This standard specifies a method for measuring the electrical continuity of a pair of mated contacts and their terminations at microvolt level, i.
21、e.when the current flowing across the contacts is very low with respect to nominal current rating. It shall be used together with EN 2591. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited
22、 at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition
23、of the publication referred to applies. IEC 50(302), International electrotechnical vocabulary Chapter 302: Electrical measuring instruments. EN 2591, Aerospace series Elements of electrical and optical connection Test methods General. 3 Preparation of specimens 3.1 The contacts concerned shall not
24、have been subjected to any prior fatigue test or heating at rated current. Elements of connection shall be mated and fitted with their contacts wired in accordance with the technical specification. The electrical continuity shall be measured individually across each pair of contacts. 3.2 Unless indi
25、cated in the technical specification, the following details shall be specified: input voltage U E ; admissible value for voltage variation (U E U A ); type of cable; test duration. 4 Apparatus Voltmeters shall be of the0,5class and have an internal resistance higher than or equal to10M7 seeIEC50(302
26、). A schematic diagram of the test apparatus is shown inFigure 1. 5 Method 5.1 Procedure Measurements shall be carried out with d.c.current in both directions. The input voltage U Eshall be adjusted to the value specified in the technical specification and maintained constant at1%. Voltage shall be
27、recorded throughout the test duration specified by the technical specification. Polarity shall be reversed half-way through the test. 5.2 Requirement The variation recorded shall not exceed the specified value. Figure 1 4 blankBSEN2591-203:1996 BSI 11-1999 List of references See national foreword.BS
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