Fike FVA-IP, Installation And Operation Manual

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FVA-IP Camera Installation and Operation Manual
Revision Date: June, 2019 P/N 06-523 (Rev. 5) 7
Table 1 – Detection times in seconds of IP camera models to various sources.
Fuel Source
Distance to
detector
2.8 mm FOV 6 mm FOV 8 mm FOV
EX 8 mm
FOV
1 ft pan of Heptane 100 ft 18 9 9 9
1 ft pan of JP‐8 100 ft 18 10 10 10
1 ft pan of Ethyl Alcohol 100 ft 21 10 11 11
1 ft pan of Isopropyl Alcohol 100 ft 16 9 9 10
1 ft pan of Unleaded Gasoline 100 ft 8 8 8 9
4 min Smoke Emitter 100 ft 301 94 52 63
4 min Smoke emitter 75 ft 43 24 22 48
6 in pan of Heptane 100 ft 100 10 9 10
Cardboard boxes and paper
4 ea. 10 x 10 x 4‐in. boxes
100 ft 278 83 101 97
6 in diameter pan of
Heptane/toluene 75/25
28 ft 19 19 20 18
Shredded newspaper 28 ft 127 150 102 151
Smoldering wood 28 ft 3062 3279 3027 2927
Wood Crib 6 x 6 x 2.5‐in. 28 ft 142 192 145 194
NOTE: Known nuisance sources include: Welding, grinding, modulated light sources, and directional light sources.
2.3 Detection Range
After proper camera positioning, detection range is the second most important consideration. The most sensitive
detection algorithm to distance is flame detection, because it relies on direct flame image pattern analysis. To detect a
flame, the pattern must be at least 7 by 7 pixels in size. You can perform calculations to determine a relationship
between the distance and lens angle to the fire size at detection. The range of potential smoke sources and their
corresponding optical densities makes it difficult to theoretically estimate the exact distance at which a threshold of
smoke detection will be reached. The Offsite detection method depends on a variety of factors such as the presence
and properties of reflecting surfaces, the type of combustible, and the lighting conditions. The offsite algorithm is not
FM approved because of these many variables.
Cameras should be placed so that coverage will detect the desired fire size and type consistent with the hazard area.
The number of cameras needed should be determined on the basis of camera position. Unlike many radiant energy
sensing fire detectors, flames that are obstructed or outside the FOV may be detected, depending on the number of
obstructions and the reflective properties of the surrounding surfaces. Video flame and smoke detector performance
is relatively uniform across the plane intersecting a source’s optical axis. Unlike fire detectors that sense radiant
energy, corrections for fire size vs. distance need not be given for fires that may occur away from the optical axis of the
detector. You can also assume that smoke starting outside the FOV of a camera may drift into the FOV. While these
features provide extra detection, the primary objective is to ensure that all regions requiring detection coverage are
within the FOV of at least one camera. Cross zoning cameras also provides an opportunity to reduce nuisance alarms
caused by directional light sources.