ISO 7240-7:2023
Fire detection and alarm systems — Part 7: Point-type smoke detectors using scattered light, transmitted light or ionization
This document specifies requirements, test methods and performance criteria for point-type smoke detectors that operate using scattered light, transmitted light or ionization, for use in fire detection and alarm systems installed in buildings (see ISO 7240-1). This document also covers point-type smoke detectors that incorporate more than one smoke sensor operating on these principles. Additional requirements and test methods for such detectors are given in Annex N.
For the testing of other types of smoke detectors, or smoke detectors working on different principles, this document is only intended to be used for guidance. This document is not applicable to smoke detectors with special characteristics, developed for specific risks.
NOTE Certain types of detectors contain radioactive materials.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
4.1 Conformance
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
4.8.1 Closed detectors
4.8.2 Open detectors
4.9 Response to slowly developing fires
4.10 Requirements for software-controlled detectors
4.10.1 General
4.10.2 Software design
4.10.3 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 response threshold value
5.1.6 Provision for tests
5.1.7 Test schedule
5.1.8 Test report
5.2 Repeatability
5.2.1 Object of test
5.2.2 Test procedure
5.2.3 Requirements
5.3 Directional dependence
5.3.1 Object of test
5.3.2 Test procedure
5.3.3 Requirements
5.4 Reproducibility
5.4.1 Object of test
5.4.2 Test procedure
5.4.3 Requirements
5.5 Variation in supply parameters
5.5.1 Object of test
5.5.2 Test procedure
5.5.3 Requirements
5.6 Air movement
5.6.1 Object of test
5.6.2 Test procedure
5.6.3 Requirements
5.7 Dazzling
5.7.1 Object of test
5.7.2 Test procedure
5.7.3 Requirements
5.8 Additional tests for open detectors
5.8.1 Object of the test
5.8.2 Test procedure
5.9 Dry heat (operational)
5.9.1 Object of test
5.9.2 Test procedure
5.9.3 Requirements
5.10 Cold (operational)
5.10.1 Object of test
5.10.2 Test procedure
5.10.3 Requirements
5.11 Damp heat, steady state (operational)
5.11.1 Object of test
5.11.2 Test procedure
5.11.3 Requirements
5.12 Damp heat, steady state (endurance)
5.12.1 Object of test
5.12.2 Test procedure
5.12.3 Requirements
5.13 Sulfur dioxide (SO2) corrosion (endurance)
5.13.1 Object of test
5.13.2 Test procedure
5.13.3 Requirements
5.14 Shock (operational)
5.14.1 Object of test
5.14.2 Test procedure
5.14.3 Requirements
5.15 Impact (operational)
5.15.1 Object of test
5.15.2 Test procedure
5.15.3 Requirements
5.16 Vibration, sinusoidal, (operational)
5.16.1 Object of test
5.16.2 Test procedure
5.16.3 Requirements
5.17 Vibration, sinusoidal (endurance)
5.17.1 Object of test
5.17.2 Test procedure
5.17.3 Requirements
5.18 Electromagnetic compatibility (EMC) immunity tests (operational)
5.19 Fire sensitivity
5.19.1 Object of test
5.19.2 Test procedure
5.19.3 Requirements
6 Test report
7 Marking
8 Data
8.1 Hardware documentation
8.2 Software documentation
Annex A (normative) Smoke tunnel for response threshold value measurements
Annex B (normative) Test aerosol for response threshold value measurements
Annex C (normative) Smoke-measuring instruments
Annex D (normative) Apparatus for dazzling test
Annex E (normative) Apparatus for impact test
Annex F (normative) Fire test room
Annex G (normative) Smouldering (pyrolysis) wood fire (TF2)
Annex H (normative) Glowing smouldering cotton fire (TF3)
Annex I (normative) Flaming plastics (polyurethane) fire (TF4)
Annex J (normative) Flaming liquid (n-heptane) fire (TF5)
Annex K (informative) Information concerning the construction of the smoke tunnel
Annex L (informative) Compensation for detector drift
Annex M (informative) Information concerning the construction of the measuring ionization chamber
Annex N (normative) Apparatus for open detector static object test
Annex O (normative) Apparatus for testing the protection against the effect of moving objects
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
4.1 Conformance
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
4.8.1 Closed detectors
4.8.2 Open detectors
4.9 Response to slowly developing fires
4.10 Requirements for software-controlled detectors
4.10.1 General
4.10.2 Software design
4.10.3 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 response threshold value
5.1.6 Provision for tests
5.1.7 Test schedule
5.1.8 Test report
5.2 Repeatability
5.2.1 Object of test
5.2.2 Test procedure
5.2.3 Requirements
5.3 Directional dependence
5.3.1 Object of test
5.3.2 Test procedure
5.3.3 Requirements
5.4 Reproducibility
5.4.1 Object of test
5.4.2 Test procedure
5.4.3 Requirements
5.5 Variation in supply parameters
5.5.1 Object of test
5.5.2 Test procedure
5.5.3 Requirements
5.6 Air movement
5.6.1 Object of test
5.6.2 Test procedure
5.6.3 Requirements
5.7 Dazzling
5.7.1 Object of test
5.7.2 Test procedure
5.7.3 Requirements
5.8 Additional tests for open detectors
5.8.1 Object of the test
5.8.2 Test procedure
5.9 Dry heat (operational)
5.9.1 Object of test
5.9.2 Test procedure
5.9.3 Requirements
5.10 Cold (operational)
5.10.1 Object of test
5.10.2 Test procedure
5.10.3 Requirements
5.11 Damp heat, steady state (operational)
5.11.1 Object of test
5.11.2 Test procedure
5.11.3 Requirements
5.12 Damp heat, steady state (endurance)
5.12.1 Object of test
5.12.2 Test procedure
5.12.3 Requirements
5.13 Sulfur dioxide (SO2) corrosion (endurance)
5.13.1 Object of test
5.13.2 Test procedure
5.13.3 Requirements
5.14 Shock (operational)
5.14.1 Object of test
5.14.2 Test procedure
5.14.3 Requirements
5.15 Impact (operational)
5.15.1 Object of test
5.15.2 Test procedure
5.15.3 Requirements
5.16 Vibration, sinusoidal, (operational)
5.16.1 Object of test
5.16.2 Test procedure
5.16.3 Requirements
5.17 Vibration, sinusoidal (endurance)
5.17.1 Object of test
5.17.2 Test procedure
5.17.3 Requirements
5.18 Electromagnetic compatibility (EMC) immunity tests (operational)
5.19 Fire sensitivity
5.19.1 Object of test
5.19.2 Test procedure
5.19.3 Requirements
6 Test report
7 Marking
8 Data
8.1 Hardware documentation
8.2 Software documentation
Annex A (normative) Smoke tunnel for response threshold value measurements
Annex B (normative) Test aerosol for response threshold value measurements
Annex C (normative) Smoke-measuring instruments
Annex D (normative) Apparatus for dazzling test
Annex E (normative) Apparatus for impact test
Annex F (normative) Fire test room
Annex G (normative) Smouldering (pyrolysis) wood fire (TF2)
Annex H (normative) Glowing smouldering cotton fire (TF3)
Annex I (normative) Flaming plastics (polyurethane) fire (TF4)
Annex J (normative) Flaming liquid (n-heptane) fire (TF5)
Annex K (informative) Information concerning the construction of the smoke tunnel
Annex L (informative) Compensation for detector drift
Annex M (informative) Information concerning the construction of the measuring ionization chamber
Annex N (normative) Apparatus for open detector static object test
Annex O (normative) Apparatus for testing the protection against the effect of moving objects
Bibliography