BS 5839-5:1988 - Fire detection and alarm systems for buildings. Specification for optical beam smoke detectors – BSI British Standards

BS 5839-5:1988

Fire detection and alarm systems for buildings. Specification for optical beam smoke detectors

Status : Withdrawn   Published : March 1988

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Summary

BS 5839-5:1988, a part of the BS 5839 series, specifies requirements, test methods and performance criteria for fire detectors utilizing attenuation of an optical beam for the detection of smoke aerosols.

An optical beam detector may or may not include an external reflector but is distinct from a point detector in that there is no integral mechanical connection to define or adjust the optical path length. This specification covers beam detectors with separations between the opposed components of 1 m to 100 m and minimum separations not exceeding 10 m.

Beam detectors with a minimum separation between the components defining the optical path in excess of 10 m are not covered by this standard because the dimensions of the fire test room described in BS 5445-9 preclude subjecting such detectors to the fire sensitivity test.

Detectors that detect thermal turbulence within the optical beam as an adjunct to the detection of attenuation of an optical beam are covered although the thermal turbulence detection is not tested beyond ensuring that performance as an optical beam detector is not impaired.

Contents

Foreword
Section 1 - Scope, Definitions
Section 2 - Requirements
Section 3 - Tests
Appendix A - Determination of the response threshold value




Standard NumberBS 5839-5:1988
TitleFire detection and alarm systems for buildings. Specification for optical beam smoke detectors
StatusWithdrawn
Publication Date31 March 1988
Confirm Date25 February 1998
Withdrawn Date01 May 2009
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Draft Superseded By86/43810 DC
DescriptorsFire alarms, Fire detectors, Alarm systems, Fire safety in buildings, Fire safety, Buildings, Optical instruments, Smoke detectors, Detectors, Sensitivity, Performance testing, Fire tests, Warning devices, Response time, Electrical testing, Turbulence, Reproducibility, Marking, Specimen preparation, Test equipment, Testing conditions, Tolerances (measurement), Environmental testing, Performance, Impact testing, Type testing, Voltage fluctuations, Mechanical testing, Tracking tests
ICS13.220.20
13.320
Title in FrenchSystèmes de détection d'incendie et d'alarme pour les bâtiments. Détecteurs de fumée à rayon optique. Spécifications
Title in GermanFeuermelde- und Feueralarmsysteme fuer Gebaeuden. Lichtempfindliche Rauchmelder
CommitteeFSH/12
ISBN0 580 16252 4
PublisherBSI
FormatA4
DeliveryNo
Pages24
File Size336.9 KB
NotesThis standard has been withdrawn as it is no longer relevant
Price£130.00


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