IS/ISO 7240 : Part 12 : 2022 Fire Detection and Alarm Systems - Part 12 Line-Type Smoke Detectors Using a Transmitted Optical Beam
NATIONAL FOREWORD
This Indian Standard (Part 12) (First Revision) which is identical to ISO 7240-12 : 2022 'Fire detection and alarm systems - Part 12: Line type smoke detectors using a transmitted optical beam' issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Fire Fighting Sectional Committee and approval of the Civil Engineering Division Council.
This standard was first published in 2018 as IS/ISO 7240-12 : 2014. This revision has been undertaken to align it with the latest version of ISO 7240-12 to make pace with the latest international practices.
This standard is published in various parts. The other parts in this series are:
| Part 2 | Fire detection 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 | Point-type fire detectors using a carbon monoxide sensor in combination with a heat sensor |
| Part 10 | Point-type flame detectors |
| Part 11 | Manual call points |
| Part 13 | Compatibility assessment of system components |
| Part 15 | Point-type fire detectors using smoke heat sensors |
| Part 16 | Sound system control and indicating equipment |
| Part 17 | Transmission path isolators |
| Part 18 | Input/output devices |
| Part 20 | Aspirating smoke detectors |
| Part 21 | Routing equipment |
| Part 22 | Smoke-detection equipment for ducts |
| Part 23 | Visual alarm devices |
| Part 24 | Fire alarm loudspeakers |
| Part 25 | Components using radio transmission paths |
| Part 27 | Point-type fire detectors using a smoke sensor in combination with carbon monoxide sensor and, optionally, one or more heat sensors |
| Part 29 | Video fire detectors |
| Part 31 | Resettable line-type heat detectors |
A fire detection and alarm system are required to function satisfactorily not only in the event of fire, but also during and after exposure to conditions likely to be met in practice, including corrosion, vibration, direct impact, indirect shock and electromagnetic interference. Specific tests are intended to assess the performance of the smoke detector under such conditions.
This standard is not intended to place any other restrictions on the design and construction of such detectors.
In this revision, uniform acceptance criteria has been adopted for all line-type smoke detectors.
The text of ISO standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions and terminologies are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:
a) Wherever the words 'International Standard' appear referring to this standard, they should be read as 'Indian Standard'; and
b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker.