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AS 7240.27:2018
$242.18
Fire detection and fire alarm systems, Part 27: Point type fire detectors using a smoke sensor in combination with a carbon monoxide sensor and, optionally, one or more heat sensors (ISO 7240-27:2018, MOD)
The objective of this Standard is to specify requirements, test methods and performance criteria for multi-sensor point fire detectors that incorporate a smoke sensor, a carbon monoxide (CO) sensor and, optionally, one or more heat sensors, for use in fire detection and alarm systems installed in buildings (refer to AS ISO 7240.1).
Table of contents
Header
About this publication
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 General requirements
4.1 Compliance
4.2 Response threshold value of detectors using scattered or transmitted light
4.3 Individual alarm indication
4.4 Connection of ancillary devices
4.5 Monitoring of detachable detectors
4.6 Manufacturer’s adjustments
4.7 On-site adjustment of response behaviour
4.8 Protection against the ingress of foreign bodies
4.9 Rate-sensitive CO response behaviour
4.10 Smoke response to slowly developing fires
4.11 Requirements for software controlled detectors
4.11.1 General
4.11.2 Software design
4.11.3 Storage of programs and data
5 Tests
5.1 General
5.1.1 Atmospheric conditions for tests
5.1.2 Operating conditions for tests
5.1.3 Mounting arrangements
5.1.4 Tolerances
5.1.5 Measurement of smoke response threshold value
5.1.6 Measurement of CO response threshold value
5.1.7 Measurement of heat sensor response value
5.1.8 Provision for tests
5.1.9 Test schedule
5.1.10 Test report
5.2 Repeatability of smoke response
5.2.1 Object of the test
5.2.2 Test procedure
5.2.3 Requirements
5.3 Repeatability of CO response
5.3.1 Object of the test
5.3.2 Test procedure
5.3.3 Requirements
5.4 Directional dependence of smoke response
5.4.1 Object of the test
5.4.2 Test procedure
5.4.3 Requirements
5.5 Directional dependence of CO response
5.5.1 Object of the test
5.5.2 Test procedure
5.5.3 Requirements
5.6 Directional dependence of heat response (optional function)
5.6.1 Object of the test
5.6.2 Test procedure
5.6.3 Requirements
5.7 Lower limit of heat response (optional function)
5.7.1 Object of the test
5.7.2 Test procedure
5.7.3 Requirements
5.8 Reproducibility of smoke response
5.8.1 Object of the test
5.8.2 Test procedure
5.8.3 Requirements
5.9 Reproducibility of CO response
5.9.1 Object of the test
5.9.2 Test procedure
5.9.3 Requirements
5.10 Reproducibility of heat response (optional function)
5.10.1 Object of the test
5.10.2 Test procedure
5.10.3 Requirements
5.11 Exposure to chemical agents at environmental concentrations
