SYSTEM DESIGN INFORMATION
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4.5 FIRE DETECTION CHARACTERISTICS
4.5.1 GENERAL
A large number of fire tests have been carried during the development phase of the FV300
FlameVision detector to determine the response limits. The results of these tests are summarised
below.
4.5.2 FIRE DETECTION RANGE AND RESPONSE TIME
The following table shows the detection range and field of view for the FV300 detectors for a
selection of typical fuels. The FV300 dynamically adjusts to the fire size and does not need
selectable sensitivity levels. These performance figures have been tested and confirmed by FM
Approvals apart from the figure marked †.
The detector range is unaffected by the presence of hot objects (black bodies) within the field of
view.
The typical response time for the detector is less than 12 seconds. The following table shows the
response time for a selection of fuels measured on axis for fully developed fires. These
performance figures have been tested and confirmed by FM Approvals.
Fuel
Size
m
2
(ft x ft)
Field of View
H: Horizontal
V: Vertical
Distance
m (ft)
N-Heptane 0.1 (1 x 1) H: ±45°
V: ±40°
50 (165)
Petrol 0.1 (1 x 1) H: ±45°
V: ±35°
50 (165)
Aviation fuel (JP5) 0.4 (2 x 2) H: ±45°
V: ±40°
50 (165)
Alcohol (Methylated spirits) 0.1 (1 x 1) H: ±45°
V: ±40°
35 (115)
Diesel 0.1 (1 x 1) H: ±45°
V: ±30°
25 (82) †
Diesel 0.1 (1 x 1) H: ±45° 24 (80)
Diesel 0.1 (1 x 1) V: ±30° 15 (50)
Methane plume 30 inches H: ±45°
V: ±40°
20 (64)
Fuel
Size
m
2
(ft x ft)
Distance
m (ft)
Response Time
Seconds
N-Heptane 0.1 (1 x 1) 50 (165) 9
N-Heptane 0.1 (1 x 1) 61 (200) 11
N-Heptane 0.2 (1.5 x 1.5) 61 (200) 7
Petrol 0.1 (1 x 1) 55 (180) 9
Aviation fuel (JP5) 0.4 (2 x 2) 61 (200) 9
Alcohol (Methylated spirits) 0.1 (1 x 1) 35 (115) 11
Diesel 0.1 (1 x 1) 30 (100) 11
Diesel 0.4 (2 x 2) 50 (165) 7
Methane plume 30 inches 24 (80) 18
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