BS 4737-3 2-1977 Intruder alarm systems - Specifications for components - Foil on glass《擅入者报警系统 第3部分 元部件规范 第2节 玻璃防护箔层》.pdf

1、BRITISH STANDARD BS 4737-3.2: 1977 Specification for Intruder alarm systems in buildings Part 3: Requirements for detection devices Section 3.2: Foil on glass UDC 696.6:654.924.3:621.792.4BS4737-3.2:1977 This British Standard, having been prepared under the direction of the Electronic Equipment Stan

2、dards Committee, was published under the authority of the Executive Board on 31 May 1977 BSI 12-1998 First published April 1971 First revision May 1977 The following BSI references relate to the work on this standard: Committee reference EEL/27 Draft for comment 74/25542 DC ISBN 0 580 09703 X Cooper

3、ating organizations The Electronic Equipment Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: British Broadcasting Corporation British Electrical and All

4、ied Manufacturers Association British Radio Equipment Manufacturers Association Cable Television Association of Great Britain Department of Prices and Consumer Protection Electrical, Electronic, Telecommunication and Plumbing Union Electricity Supply Industry in England and Wales Electronic Componen

5、ts Board Electronic Engineering Association * Engineering Equipment Users Association Institution of Electronic and Radio Engineers Post Office * Radio and Electronic Component Manufacturers Federation Scientific Instrument Manufacturers Association The organizations marked with an asterisk in the a

6、bove list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Association of Burglary Insurance Surveyors Association of Chief Police Officers British Bankers Association British Insurance Association British Railways Boar

7、d British Security Industry Association Department of the Environment Home Office Independent Burglar Alarm Association Lloyds Syndicates Survey Department Metropolitan Police Ministry of Defence National Supervisory Council for Intruder Alarms Telecommunication Engineering and Manufacturing Associa

8、tion Amendments issued since publication Amd. No. Date of issue CommentsBS 4737-3.2:1977 BSI 12-1998 i Contents Page Cooperating organizations Inside back cover Foreword ii 1 Scope 1 2 References 1 3 Definitions 1 4 Circuit configuration 1 5 Material requirements 1 6 Fixing 1 7 Connections 1 8 Locat

9、ion 1 9 Environment 1 Figure 1 Examples of permissible locations for foil 2 Standards publication referred to Inside back coverBS4737-3.2:1977 ii BSI 12-1998 Foreword This revision of BS4737 has been prepared under the authority of the Electronic Equipment Standards Committee in order to reflect the

10、 technical advances in the industry since the publication of the 1971 edition. It takes account of Amendment Slip No.1,1972 (AMD1064) and of Amendment Slip No.2,1973 (AMD1218). It is being published in a number of Sections as follows. Part 1: Requirements for systems with audible signalling only; Se

11、ction 1.1. Installation; Section 1.2. Maintenance and records. Part 2: Requirements for systems with remote signalling; Section 2.1. Installation; Section 2.2. Maintenance and records. Part 3: Requirements for detection devices, consisting of a number of separate Sections (3.1,3.2,3.3etc.). The spec

12、ifications for detection devices (including this Section of BS4737) are to be read in conjunction with Section 1.1 or Section 2.1 (as appropriate). A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct

13、application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 and 2, an inside back cover and a back cover. This standard has been updated (see copyrigh

14、t date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS 4737-3.2:1977 BSI 12-1998 1 1 Scope This British Standard specifies requirements for foil to be used to protect glass surfaces and to be incorporated in intruder alarm systems

15、 in buildings. NoteSome types of glass (e.g. laminated glass) may not be suitable for protection by foil. 2 References The titles of the standards publications referred to in this standard are listed on the inside back cover. 3 Definitions For the purposes of this British Standard, the following def

16、inition applies in addition to those given in BS4737-2.1. 3.1 foil on glass a detection device, consisting of metallic foil fixed to a glass surface, designed to generate an alarm condition when the glass is broken across the line of the foil 4 Circuit configuration Foil shall be closed-circuit in e

17、ither single- or double-pole configuration. It shall be connected to one or both poles of a double-pole detection circuit at the take-off connectors (seeclause6). 5 Material requirements The foil shall be not more than 0.04mm thick, and each strip shall be not more than 12.5mm wide. 6 Fixing The foi

18、l shall be applied evenly and so bonded to the glass as to prevent blistering or loosening under normal conditions. Cracks in the glass shall not be bridged by foil. The foil shall not be carried across the butt joints of unframed and cemented glass. 7 Connections At the junction of the glass and fr

19、ame, take-off connectors shall be used. On unframed glass doors, take-off connectors shall be not more than 100mm from the edge of the glass. 8 Location Foil shall be applied in one of the following ways. a) As a single-pole strip near all four edges of the pane, not less than 50mm and not more than

20、100mm from the edges, except at the points where the foil circuit is taken off seeFigure 1(a). b) As a single-pole strip parallel to the longer dimension of the pane, not less than 300mm from the edge, except at the ends of the strip. If the shorter dimension of the pane is less than600mm, the foil

21、shall be applied equidistant from the longer edges seeFigure 1(b). c) As a single-pole circuit consisting of parallel strips of foil, not more than 200mm apart between centres. The ends of the strips and the portions of foil which connect adjacent strips, shall be not less than 50mm and not more tha

22、n100mm from the edges, except at the points where the foil circuit is taken off seeFigure 1(c). d) On unframed glass doors only, as a single-pole strip in the form of a loop not less than 200mm by 200mm seeFigure 1(d). e) As a double-pole circuit, in which each strip is not less than 50mm and not mo

23、re than 100mm from the edges, except at the points where the foil circuit is taken off seeFigure 1(e). 9 Environment The foil strips shall be fixed and protected so that the detector continues to function satisfactorily under any combination of the following environmental conditions. Temperature: -1

24、0 C to + 50 C Relative humidity: 10% to 95%BS4737-3.2:1977 2 BSI 12-1998 Figure 1 Examples of permissible locations for foilBS4737-3.2:1977 BSI 12-1998 Standards publications referred to BS 4737, Specification for intruder alarm systems in buildings. BS 4737-1, Requirements for systems with audible

25、signalling only. BS 4737-1.1, Installation. BS 4737-2, Requirements for systems with remote signalling. BS 4737-2.1, Installation.BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |

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