Standard
Track updates
AS ISO 7240.24:2018
[Current]Fire detection and alarm systems, Part 24: Fire alarm loudspeakers
The objective of this Standard is to specify requirements, test methods and performance criteria for loudspeakers intended to broadcast a warning of fire between a fire detection and alarm system and the occupants of a building (refer to AS ISO 7240.1:2018, Figure 1, Item C).
Published: 20/12/2018
Pages: 39
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
3.2 Abbreviated terms
4 Requirements
4.1 Compliance
4.2 Frequency response limits
4.3 Durability
4.4 Construction
4.4.1 Provision for external conductors
4.4.1.1
4.4.1.2
4.4.2 Materials
4.4.3 Ingress protection
4.4.4 Access
5 Tests
5.1 General
5.1.1 Atmospheric conditions for tests
5.1.1.1
5.1.1.2
5.1.2 Operating conditions for tests
5.1.2.1
5.1.2.2
5.1.2.3
5.1.3 Mounting arrangements
5.1.3.1
5.1.3.2
5.1.4 Tolerances
5.1.4.1
5.1.4.2
5.1.5 Frequency response measurement and sensitivity calculation
5.1.5.1 Measuring arrangement
5.1.5.2 Measurements
5.1.5.2.1
5.1.5.2.2
5.1.5.2.3
5.1.5.2.4
5.1.5.2.5
5.1.5.3 Sensitivity calculation
5.1.6 Frequency response measurement and sensitivity calculation for loudspeakers requiring dedicated system equalization
5.1.6.1 General
5.1.6.2 Measuring arrangement
5.1.6.2.1
5.1.6.2.2
5.1.6.3 Measurements
5.1.7 Provision for tests
5.1.7.1
5.1.7.2
5.1.8 Test schedule
5.1.8.1
5.1.8.2
5.1.8.3
5.2 Reproducibility
5.2.1 Object of the test
5.2.2 Test procedure
5.2.2.1
5.2.2.2
5.2.3 Requirements
5.2.3.1
5.2.3.2
5.2.3.3
5.3 Rated impedance
5.3.1 Object of the test
5.3.2 Test procedure
5.3.2.1
5.3.2.2
5.3.2.3
5.3.2.4
5.3.2.5
5.3.3 Requirements
5.4 Horizontal and vertical coverage angles
5.4.1 Object of the test
5.4.2 Test procedure
5.4.2.1 General
5.4.2.1.1
5.4.2.1.2
5.4.2.1.3
5.4.2.1.4
5.4.2.2 Horizontal coverage angle
5.4.2.2.1
5.4.2.2.2
5.4.2.2.3
5.4.2.3 Vertical coverage angle
5.4.3 Requirements
5.5 Maximum sound pressure level
5.5.1 Object of the test
5.5.2 Test procedure
5.5.2.1 General
5.5.2.1.1
5.5.2.1.2
5.5.2.1.3
5.5.2.1.4
5.5.2.2 Measurement of maximum sound pressure level
5.5.3 Requirements
5.6 Rated noise power (durability)
5.6.1 Object of the test
5.6.2 Test procedure
5.6.2.1 General
5.6.2.2 Conditioning
5.6.2.2.1
5.6.2.2.2
5.6.2.3 Measurements during conditioning
5.6.2.4 Final measurements
5.6.2.4.1
5.6.2.4.2
5.6.3 Requirements
5.6.3.1
5.6.3.2
5.6.3.3
5.7 Dry heat (operational)
5.7.1 Object of the test
5.7.2 Test procedure
5.7.2.1 General
5.7.2.2 State of specimen during conditioning
5.7.2.3 Conditioning
5.7.2.4 Measurements during conditioning
5.7.2.5 Final measurements
5.7.3 Requirements
5.7.3.1
5.7.3.2
5.7.3.3
5.8 Dry heat (endurance)
5.8.1 Object of the test
5.8.2 Test procedure
5.8.2.1 General
5.8.2.2 State of the specimen during conditioning
5.8.2.3 Conditioning
5.8.2.4 Final measurements
5.8.3 Requirements
5.9 Cold (operational)
5.9.1 Object of the test
5.9.2 Test procedure
5.9.2.1 General
5.9.2.2 State of specimen during conditioning
5.9.2.3 Conditioning
5.9.2.4 Measurements during conditioning
5.9.2.5 Final measurements
5.9.3 Requirements
5.9.3.1
5.9.3.2
5.9.3.3
5.10 Damp heat, cyclic (operational)
5.10.1 Object of the test
5.10.2 Test procedure
5.10.2.1 General
5.10.2.2 State of the specimen during conditioning
5.10.2.3 Conditioning
5.10.2.4 Measurements during conditioning
5.10.2.5 Final measurements
5.10.3 Requirements
5.10.3.1
5.10.3.2
5.10.3.3
5.11 Damp heat, steady-state (endurance)
5.11.1 Object of the test
5.11.2 Test procedure
5.11.2.1 General
5.11.2.2 State of the specimen during conditioning
5.11.2.3 Conditioning
5.11.2.4 Final measurements
5.11.3 Requirements
5.11.3.1
5.11.3.2
5.12 Damp heat, cyclic (endurance)
5.12.1 Object of the test
5.12.2 Test procedure
5.12.2.1 General
5.12.2.2 State of the specimen during conditioning
5.12.2.3 Conditioning
5.12.2.4 Final measurements
5.12.3 Requirements
5.12.3.1
5.12.3.2
5.13 Sulfur dioxide (SO2) corrosion (endurance)
5.13.1 Object of the test
5.13.2 Test procedure
5.13.2.1 General
5.13.2.2 State of the specimen during conditioning
5.13.2.3 Conditioning
5.13.2.4 Final measurements
5.13.2.4.1
5.13.2.4.2
5.13.3 Requirements
5.13.3.1
5.13.3.2
5.14 Shock (operational)
5.14.1 Object of the test
5.14.2 Test procedure
5.14.2.1 General
5.14.2.2 State of the specimen during conditioning
5.14.2.3 Conditioning
5.14.2.3.1
5.14.2.3.2
5.14.2.3.3
5.14.2.4 Final measurements
5.14.3 Requirements
5.14.3.1
5.14.3.2
5.15 Impact (operational)
5.15.1 Object of the test
5.15.2 Test procedure
5.15.2.1 General
5.15.2.2 State of the specimen during conditioning
5.15.2.3 Conditioning
5.15.2.3.1
5.15.2.3.2
5.15.2.3.3
5.15.2.4 Final measurements
5.15.3 Requirements
5.15.3.1
5.15.3.2
5.16 Vibration, sinusoidal (operational)
5.16.1 Object of the test
5.16.2 Test procedure
5.16.2.1 General
5.16.2.2 State of the specimen during conditioning
5.16.2.2.1
5.16.2.2.2
5.16.2.3 Conditioning
5.16.2.3.1
5.16.2.3.2
5.16.2.3.3
5.16.2.3.4
5.16.2.4 Measurements during conditioning
5.16.2.5 Final measurements
5.16.3 Requirements
5.16.3.1
5.16.3.2
5.16.3.3
5.17 Vibration, sinusoidal (endurance)
5.17.1 Object of the test
5.17.2 Test procedure
5.17.2.1 General
5.17.2.2 State of the specimen during conditioning
5.17.2.2.1
5.17.2.2.2
5.17.2.3 Conditioning
5.17.2.3.1
5.17.2.3.2
5.17.2.3.3
5.17.2.4 Final measurements
5.17.3 Requirements
5.17.3.1
5.17.3.2
5.18 Ingress protection
5.18.1 Object of the test
5.18.2 Enclosure of the loudspeaker
5.18.3 Test procedure
5.18.3.1 General
5.18.3.2 State of the specimen during conditioning
5.18.3.2.1
5.18.3.2.2
5.18.3.2.3
5.18.3.3 Conditioning
5.18.3.4 Final measurements
5.18.4 Requirements
5.18.4.1
5.18.4.2
5.18.4.3
6 Test report
7 Marking
7.1
7.2
7.3
7.4
8 Data
8.1
8.2
Annex A
A.1 Measurement environments
A.1.1 General
A.1.1.1
A.1.1.2
A.1.1.3
A.1.1.4
A.1.2 Free-field condition
A.1.2.1
A.1.2.2
A.1.3 Half-space free-field condition
A.1.3.1
A.1.3.2
A.1.4 Standard baffle
A.1.5 Ground-plane measurement
A.1.5.1
A.1.5.2
A.1.6 Comparative measurements
A.1.6.1
A.1.6.2
A.1.6.3
A.1.6.4
A.2 Measurement method
A.2.1 Measuring distance
A.2.2 Background noise
A.2.3 Preconditioning
A.2.4 Measuring equipment
A.2.4.1
A.2.4.2
A.2.4.3
Annex B
B.1 Measurement environment
B.1.1 General
B.1.2 Test room
B.1.3 Measuring equipment
B.1.3.1
B.1.3.2
B.1.3.3
B.2 Simulated program signal
B.2.1
B.2.2
B.2.3
B.2.4
B.3 Normal measuring conditions
B.4 Measurement conditions for loudspeakers requiring dedicated system equalization
Annex C
Bibliography
Cited references in this standard
[Current]
Environmental testing - Part 2-78: Tests - Test Cab: Damp heat, steady state
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