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Installation Guide and Operating Manual
4.6.2
False Alarm Immunity
The following tables represent the minimum distance at which the Detector did not false alarm or show
any signs of instability during exposure to the sources listed below. Additionally, the sensitivity to a one
(1) square foot n-Heptane reference pan fire in the presence of the false fire source is listed.
Minimum Distance
with no Alarm
Sensitivity to a 1' x 1' n-Heptane
reference pan fire in the
presence of the false fire source
Direct Sunlight
No Alarm
50 feet /15.24 meters
Modulated Sunlight
No Alarm
25 feet / 7.62 meters
Modulated Arcwelding
3 feet 9 inches / 1.14 meters
Source at 15 feet / 4.57 meters
Fire at 30 feet / 9.14 meters
Continuous Arcwelding
3 feet 9 inches / 1.14 meters
Source at 15 feet / 4.57 meters
Fire at 30 feet / 9.14 meters
Resistive Electric Heater
1 foot / 30.48 centimeters
Source at 3 feet / 91.44 centimeters
Fire at 200 feet / 60.96 meters
Flourescent Lamp
1 foot / 30.48 centimeters
Source at 3 feet / 91.44 centimeters
Fire at 200 feet / 60.96 meters
Halogen Lamp
1 foot / 30.48 centimeters
Source at 7 feet / 2.13 meters
Fire at 200 feet / 60.96 meters
Sodium Vapor Lamp
1 foot / 30.48 centimeters
Source at 3 feet / 91.44 centimeters
Fire at 200 feet / 60.96 meters
Pelican Flashlight
1 foot / 30.48 centimeters
Source at 3 feet / 91.44 centimeters
Fire at 200 feet / 60.96 meters
Incandescent Lamp
1 foot / 30.48 centimeters
Source at 3 feet / 91.44 centimeters
Fire at 200 feet / 60.96 meters
False Fire Source
Honeywell
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