Honeywell FS20X Series User Manual page 41

False Alarm Immunity
The second column in this table shows the minimum distance at which a detector
exposed to various false fire sources did not alarm or show any signs of instability.
The third column shows the sensitivity to a one-foot square n-Heptane reference fire
in the presence of those false fire sources.
False Fire Source
Direct Sunlight
Modulated Sunlight
Modulated Arcwelding
Continuous Arcwelding
Resistive Electric Heater
Flourescent Lamp
Halogen Lamp
Sodium Vapor Lamp
Pelican Flashlight
Incandescent Lamp
FS20X Fire and Flame Detectors
False Alarm Immunity
Minimum Distance
Sensitivity to Reference Fire
with No Alarm
No alarm
No alarm
9 ft 9 in (3 m)
9 ft 9 in (3 m)
1 ft (30.48 cm)
1 ft (30.48 cm)
1 ft (30.48 cm)
1 ft (30.48 cm)
1 ft (30.48 cm)
1 ft (30.48 cm)
50 ft (15.24 m)
25 ft (7.62 m)
Source at 30 ft (9.14 m)
Fire at 30 ft (9.14 m)
Source at 30 ft (9.14 m)
Fire at 30 ft (9.14 m)
Source at 3 ft (91.44 cm)
Fire at 200 ft (60.96 m)
Source at 3 ft (91.44 cm)
Fire at 200 ft (60.96 m)
Source at 3 ft (91.44 cm)
Fire at 200 ft (60.96 m)
Source at 3 ft (91.44 cm)
Fire at 200 ft (60.96 m)
Source at 3 ft (91.44 cm)
Fire at 200 ft (60.96 m)
Source at 3 ft (91.44 cm)
Fire at 200 ft (60.96 m)
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