Page 14 of 97
Title FireVu Detector Standalone Installation Manual
NetVu Ltd.
No 1 Thellow Heath Park, Northwich Road, Northwich, Cheshire. CW9 6JB
Installation Accessories:
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Wall Mount Bracket Gland
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Wal Mount Bracket Drilling Template
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Rawl Plugs and Screws
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Sunshield fixing screws
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Allen Key
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Silica Bag
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Free Extended Warranty Registration Reminder Card
First Fix
– Physical Installation of FireVu Detectors
Principle of Operation
The FireVu detectors are autonomous devices capable of recognising smoke, a flame or a thermal
event in a video image and alerting the system user on a connected PC VDU, or Annunciator
connected monitor, or by a variety of remote outputs.
Alarm conditions are stored within the FireVu detector’s log.
The FireVu detectors use patented Black Body Emissivity analysis technology, alongside flicker
detection, to quickly detect the presence of a flame.
The system also rapidly detects smoke by looking for small areas of change within the image at the
digitisation stage and only passing these pixel changes to the main processor for further filtering.
The video information is passed through a series of filters which seek particular characteristics
which can be associated with smoke. Further analysis is then carried out on the relationships
between the filtered characteristics to determine whether all the conditions have been met for the
system to confidently predict the presence of smoke.
To provide compensation for areas of the image which would otherwise prove troublesome, such
as windows or smoke or steam producing processes, part of the image can be eliminated from
detection by use of masks. The masks are user defined and can be fixed on a per pixel basis
(Exclusion Masking) or on a colour detection basis (Dynamic Masking), or both.
The FireVu detector has four solid-state relays that can be configured to operate in the event of an
alarm. These can be hard-
wired to the Client’s Fire Alarm Control Panel (FACP), or Building
Management System (BMS), or both.
Appropriate Applications for FireVu
FireVu can be deployed as an effective detection system in almost all environments. Consequently,
any decision not to utilise FireVu is usually as a result of the lower cost of conventional technology
being able to provide an appropriate solution and not because of any technical shortfall with