ISO 7240-15:2014

INTERNATIONAL ISO
STANDARD 7240-15
Second edition
2014-07-01
Fire detection and alarm systems —
Part 15:
Point-type fire detectors using smoke
and heat sensors
Systèmes de détection et d’alarme d’incendie —
Partie 15: Détecteurs linéaires de fumée utilisant une transmission
par faisceaux lumineux
Reference number
©
ISO 2014
© ISO 2014
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Published in Switzerland
ii © ISO 2014 – All rights reserved

Contents Page
Foreword .v
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, and abbreviations . 2
3.1 Terms and definitions . 2
3.2 Abbreviated terms . 2
4 Requirements . 2
4.1 Compliance . 2
4.2 Design considerations. 2
4.3 Smoke-response value of detectors using scattered or transmitted light . 2
4.4 Individual alarm indication . 3
4.5 Indication of other conditions . 3
4.6 Connection of ancillary devices . 3
4.7 Monitoring of detachable detectors . 3
4.8 Manufacturer’s adjustments . 3
4.9 On-site adjustment of response behaviour . 3
4.10 Response to slowly developing fires . 4
4.11 Protection against ingress of foreign bodies . 4
4.12 Software-controlled detectors . 4
5 Tests . 6
5.1 General . 6
5.2 Repeatability of smoke response . 9
5.3 Directional dependence of smoke response .10
5.4 Directional dependence of heat response .11
5.5 Reproducibility of smoke response .11
5.6 Reproducibility of heat response .12
5.7 Lower limit of heat response .12
5.8 Air movement.13
5.9 Dazzling .14
5.10 Variation in supply parameters (voltage) .14
5.11 Dry heat (operational) .15
5.12 Cold (operational) .16
5.13 Damp heat, cyclic (operational) .17
5.14 Damp heat, steady-state (endurance) .18
5.15 Sulfur dioxide (SO ) corrosion (endurance) .19
5.16 Shock (operational) .20
5.17 Impact (operational) .21
5.18 Vibration, sinusoidal (operational) .22
5.19 Vibration, sinusoidal (endurance) .24
5.20 Electromagnetic compatibility (EMC).25
5.21 Detectors with more than one smoke sensor — Optional test . .25
5.22 Fire sensitivity .26
6 Test report .28
7 Marking .28
8 Data .29
Annex A (normative) Compensation for detector drift .30
Annex B (normative) Smoke tunnel for smoke-response value measurements .35
Annex C (normative) Heat tunnel for heat-response value measurements .40
Annex D (normative) Apparatus for the dazzling test .41
Annex E (normative) Apparatus for the impact test .42
Annex F (normative) Fire test room .44
Annex G (normative) Open cellulosic (wood) fire (TF1) .46
Annex H (normative) Smouldering (pyrolysis) wood fire (TF2) .48
Annex I (normative) Glowing smouldering cotton fire (TF3) .51
Annex J (normative) Flaming plastics (polyurethane) fire (TF4) .53
Annex K (normative) Flaming liquid (n-heptane) fire (TF5) .56
Annex L (normative) Low-temperature black-smoke liquid (decalin) fire (TF8) .58
Annex M (informative) Construction of the measuring ionization chamber .60
Annex N (informative) Construction of the heat tunnel .63
iv © ISO 2014 – All rights reserved

Foreword
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The committee responsible for this document is ISO/TC 21, Equipment for fire protection and fire fighting,
Subcommittee SC 3, Fire detection and alarm systems.
This second edition cancels and replaces the first edition (ISO 7240-15:2004), which has been technically
revised.
ISO 7240 consists of the following parts, under the general title Fire detection and alarm systems:
— Part 1: General and definitions
— Part 2: Control and indicating equipment
— Part 3: Audible alarm devices
— Part 4: Power supply equipment
— Part 5: Point-type heat detectors
— Part 6: Carbon monoxide fire detectors using electro-chemical cells
— Part 7: Point-type smoke detectors using scattered light, transmitted light or ionization
— Part 8: Carbon monoxide fire detectors using an electro-chemical cell in c
...