1、BRITISH STANDARD BS 4737-3.8: 1978 (Reprinted, incorporating Amendment No. 1) Specification for Intruder alarm systems in buildings Part 3: Requirements for detection devices Section 3.8 Volumetric capacitive detectors UDC 696.6:654.924.3:621.3.013.72BS 4737-3.8:1978 This British Standard, having be
2、en prepared under the direction of the Electronic Equipment Standards Committee, was published under the authority of the Executive Board on 29 December 1978 BSI 12-1998 First published April 1971 Firstrevision December 1978 The following BSI references relate to the work on this standard: Committee
3、 reference EEL/27 Draft for comment 74/25543 DC ISBN 0 580 10359 5 Cooperating organizations The Electronic Equipment Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following Government department and scientific and industrial orga
4、nizations: British Broadcasting Corporation British Electrical and Allied Manufacturers Association British Radio Equipment Manufacturers Association Cable Television Association of Great Britain Department of Prices and Consumer Protection Electrical, Electronic, Telecommunication and Plumbing Unio
5、n Electricity Supply Industry in England and Wales Electronic Components Board Electronic Engineering Association * Engineering Equipment Users Association Institution of Electronic and Radio Engineers Post Office * Radio and Electronic Component Manufacturers Federation Scientific Instrument Manufa
6、cturers Association The organizations marked with an asterisk in the above 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 I
7、nsurance Association British Railways Board 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 Telecommunica
8、tion Engineering and Manufacturing Association The Committee of London Clearing Bankers on behalf of the Committee of Scottish Clearing Bankers, Co-operative Bank, Central Trustee Savings Bank and Yorkshire Bank Amendments issued since publication Amd. No. Date of issue Comments 3252 March 1980 Indi
9、cated by a sideline in the marginBS 4737-3.8:1978 BSI 12-1998 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Definition 1 4 Area or volume of coverage 1 5 Test period 1 6 Power supply 1 7 Environment 1 8 Interference 1 9 Housing 1 10 Marking 1 Standa
10、rds Publications referred to Inside back coverBS 4737-3.8:1978 ii BSI 12-1998 Foreword This revision of BS 4737 has been prepared under the direction of the Electronic Equipment Standards Committee to reflect the technical advances in the industry since the publication of the 1971 edition. It takes
11、account of AmendmentNo. 1, 1972 (AMD 1064) and of Amendment No. 2, 1973 (AMD 1218). It is being published in a number of separate Sections, as follows. Part 1: Requirements for systems with audible signalling only; 1.1: Installation; 1.2: Maintenance and records; Part 2: Requirements for systems wit
12、h remote signalling; 2.1: Installation; 2.2: Maintenance and records; Part 3: Requirements for detection devices, consisting of a number of separate Sections (3.1 to 3.14). The specifications for detection devices (including this Section of BS 4737) are to be read in conjunction with Section 1.1 or
13、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 application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of p
14、ages This document comprises a front cover, an inside front cover, pages i and ii, pages1and 2, 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 theinside front cover.
15、BS 4737-3.8:1978 BSI 12-1998 1 1 Scope This British Standard specifies the general requirements for volumetric capacitive detectors to be used in intruder alarm systems in buildings. 2 References The titles of the standards publications referred to in this standard are listed on the inside back cove
16、r. 3 Definition For the purposes of this British Standard, the following definition applies in addition to those given in BS4737-1.1 and/or BS4737-2.1. volumetric capacitive detector a detection device designed to generate an alarm condition in response to the change (or rate of change) in capacitan
17、ce when a person enters and moves in the area or volume of coverage 4 Area or volume of coverage 4.1 The area or volume of coverage of the detector is that area or volume within which the entry and movement of a 60 20kg person walking at any speed between 0.3m/s and 0.6m/s through a distance of 2m c
18、auses the detector to generate an alarm condition or to signal to a processing device. The installer shall identify the area or volume of coverage in the equipment record (see7.1 of BS 4737-2.2:1977). NOTEIt should be recognized that the area or volume effectively protected by the device may extend
19、beyond the stated area or volume of coverage as a result of the judicious siting of the detector in relation to points of entry to the premises. Alteration of the position of objects within the area or volume of coverage may cause significant changes in the area or volume protected. 4.2 A method of
20、indication shall be provided to enable the subscriber to check the area or volume of coverage before the system is closed. 5 Test period Except when immediate connection is needed for urgent security reasons, or when the detector replaces a similar existing unit, the detector shall not be connected
21、to an alarm system which is extended to the police until the detector has operated in the installation for at least 7 days without generating an unwanted alarm. 6 Power supply An alarm condition shall be generated if the voltage of the power supply to the detector is reduced sufficiently to impair t
22、he performance of the detector. 7 Environment The requirements of this British Standard shall be met by the detector under any combination of the following environmental conditions. 8 Interference The detector shall be adequately protected against any externally-generated radio-frequency interferenc
23、e and/or mains-borne interference which may normally be expected to occur within the working environment. 9 Housing The detector (except the sensor itself) and any processing device shall be housed in one or more containers. It shall not be possible to open the container(s) by the normal means of ac
24、cess without operating an anti-tamper device. If the equipment is housed in separate containers, the inter-connection(s) shall be electrically protected. Any means for adjusting the equipment shall be enclosed within the container(s). 10 Marking Text deleted. Temperature: 0 C to 40 C Relative humidi
25、ty: 10 % to 90 %blankBS 4737-3.8:1978 BSI 12-1998 Standards publications referred to BS 4737, Specification for intruder alarm systems in buildings. BS 4737-1, Requirements for systems with audible signalling only. BS 4737-1.1, Installation. BS 4737-1.2, Maintenance and records 1) . BS 4737-2, Requi
26、rements for systems with remote signalling. BS 4737-2.1, Installation. BS 4737-2.2, Maintenance and records. BS 4737-3, Requirements for detection devices 1) . BS 4737-3.1, Continuous wiring. BS 4737-3.2, Foil on glass. BS 4737-3.3, Protective switches. BS 4737-3.4, Radiowave Doppler detectors. BS 4
27、737-3.5, Ultrasonic movement detectors. BS 4737-3.6, Acoustic detectors. BS 4737-3.7, Passive infra-red detectors. BS 4737-3.9, Pressure mats. BS 4737-3.10, Vibration detectors. BS 4737-3.11, Rigid printed-circuit wiring. BS 4737-3.12, Beam interruption detectors. BS 4737-3.13, Capacitive proximity
28、detectors. BS 4737-3.14, Deliberately-operated devices. 1) Referred to in the foreword only.BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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