1、BRITISH STANDARD BS EN 50109-2-4:1996 Incorporating Amendment No. 1 Hand crimping tools Tools for the crimp termination of electric cables and wires for low frequency and radio frequency applications Part 2: Particular requirements Section 2.4 Centre contacts of RF connectors, series SMZ The Europea
2、n Standard EN50109-2-4:1995 has the status of a British Standard ICS 25.140.30BSEN50109-2-4:1996 This British Standard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comes intoeffect on 15February1996 BSI 03-
3、2000 The following BSI references relate to the work on this standard: Committee reference EPL/46/4 Draft announced in BSI News October1995 ISBN 0 580 25213 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee EPL/46, Cables
4、, wires and waveguides, RF connectors and accessories for communication and signalling, to Subcommittee EPL/46/4, RF connectors, on which the following bodies were represented: AEA Technology BEAMA Electrical Cable they shall also comply with the requirements of this Part2-4, as stated in4.2 to4.11,
5、 as follows. 4.2 Indentor operation The design of the crimping tool shall be such that, under load, all indentors travel with uniform and simultaneous movement, to meet the final tolerances prescribed inFigure A.2. 4.3 Contact positioner A spring-loaded positioner shall be provided for the proper lo
6、cation of the centre contact assembly during the crimping operation. The contact shall remain correctly positioned during the complete crimping cycle. SeeFigure A.4, for dimensions, displacement and spring-thrust requirements. 4.4 Connector locator A means of supporting the connector, perpendicular
7、to the plane of the tool, shall be provided. SeeFigure A.4. 4.5 Outline dimensions and mass Crimping tools shall conform to the dimensions and mass specified inFigure A.1, although they need not necessarily be of the physical configuration depicted. 4.6 Operating force (crimping cycle) The crimping
8、tool shall be designed such that it will pass the Operating Force (crimping cycle) test as given in6.7 of Part1 and5.2.5 of this Part2-4. 4.7 Overload force The crimping tool shall be designed such that it will pass the Overload force test as given in6.8 of Part1, but uprated to200% of the maximum o
9、perating force, and5.2.7 of this Part2-4.EN50109-2-4:1995 4 BSI 03-2000 4.8 Indentors The dimensions and arrangement of the indentors shall be in accordance withFigure A.2, when tested using the gauges prescribed inFigure B.1. Surface texture shall be assessed as described in ISO468 and ISO4287-1. 4
10、.9 Crimped joints The crimping tool shall be designed such that it will ultimately produce crimped joints complying with the requirements of the appropriate connector specification. However, to eliminate the possibility of variable test results, the crimping tool is tested independently of any conne
11、ctor piece parts, according to the procedures given in6.7 of Part1 and5.2.5 and5.2.6 of this Part2-4. 4.10 Ratchet and tool stop adjustment 4.10.1 The manufacturer shall adjust the tool such that the positional accuracy of the indentors in relation to both ratchet release and tool stop-point shall c
12、omply with the requirements detailed in the following procedure. 4.10.2 The tool shall be closed on the NOT GO gauge pin detailed inAnnex B WITHOUT ACTUALLY CRIMPING IT NOR ATTEMPTING TO DO SO. The gentle force applied to the NOT GO gauge pin by the indentors shall be sufficient to retain the gauge
13、without allowing the tool to return to the fully-open position, i.e.the ratchet shall not release on the NOT GO gauge. 4.10.3 Subsequently, to confirm the accuracy of the indentor positioning, the tool shall meet the gauging requirements detailed in5.2.4. 4.11 User access The crimping tool shall be
14、designed NOT to allow easy user adjustment or dismantling of the ratchet and stop mechanisms nor the indentor assembly. Any adjustment facilities required by the manufacturer shall be sealed from user intervention, such that unauthorized adjustment would be readily detectable. 5 Test and acceptance
15、requirements 5.1 Type approval A manufacturer shall obtain Type Approval before supplying tools in accordance with this Part2-4. Application for Type Approval shall be made to the National Supervising Inspectorate. 5.2 Design acceptance requirements 5.2.1 General The requirements of clauses5, 6 and7
16、 of Part1, with the exception of6.6, 6.10 and6.11, apply. 5.2.2 Application Application for Design Acceptance shall be accompanied by the requisite number of specimens (see6.2 of Part1) and the information listed under a), b) and c) below, details of which shall form part of the manufacturers own do
17、cumentation: a) detail dimensions and drawings where applicable; b) details of materials and finish; c) evidence, in the form of a report, shall be submitted, justifying the potential for successful completion of the Design Acceptance test programme. 5.2.3 Sample size and test sequence The sample si
18、ze and test sequence shall be in accordance with the requirements of6.1 and6.2 of Part1. One of the samples shall have the contact locator removed to permit the Mechanical Endurance test5.2.8 to be carried out. 5.2.4 Gauging For the requirements of the gauging procedure referred to in6.4c of Part1,
19、the space between the opposing closed indentors shall be measured with a gauge which conforms to the requirements of Figure B.1 of this Part2-4, using the following procedure. The tool shall be gauged in the fully closed position, i.e.when the tool stop is encountered. The specified GO GAUGE shall p
20、ass cleanly through the closed indentors and the specified NOT GO gauge shall not pass through. 5.2.5 Operating force (crimping cycle) For the requirements of the test specified in6.7 of Part1, the test shall be carried out with the test piece and locator jig specified inFigure C.1 andFigure C.2. Th
21、e force applied to the crimping tool during this test shall be not greater than200N when applied to the handles at a point between30mm and35mm from the remote (distal) ends of the handles. 5.2.6 Run-out After successfully crimping a test piece, the run-out (axial alignment) shall be measured in accordance withFigure C.3. The run-out shall not exceed0,28mm Total Indicator Reading (TIR); this includes a manufacturing tolerance of0,13mm TIR for the test piece.
