Honeywell FS24X - False Alarm Immunity

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Installation Guide and Operating Manual

Honeywell 24

4.6.2 False Alarm Immunity

The following table represents the minimum distance at which the detector did not false alarm or show

any signs of instability during exposure to the sources listed. Additionally, the sensitivity to a one

square foot n-Heptane reference pan fire in the presence of the false fire source is listed.

False Fire Source

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