Flame Response Sensitivity - Honeywell FS24X Plus User Manual

Flame Response Sensitivity

The following table provide FS24X Plus™ response times and distance to various fuels. The relative
ratio among Very High. High, Medium, and Low sensitivities are about 100%, 75%, 50%, and 25%.
FM witness testing included verifying all sensitivities for indoor/outdoor heptane.
The Inverse Square Law is applicable to define the relationship on the radiant power reaching a
detector versus the distance between the detector and the fire. The radiant power reaching a
detector is reduced by a factor of square of the distance between the detector and the fire. For
example, The radiant power reaching a detector is reduced by a factor of 4 if the distance between
the detector and the fire is doubled (e.g., the radiant energy from 30cm by 30cm fire at 60m is
equivalent to that from 15cm by 15cm fire at 30m).
Fuel Fire Size
Indoor
6 in X 6 in (0.15m
Heptane
X 0.15m)
6 in X 6 in (0.15m
IPA
X 0.15m)
3/8 in (9.5mm) Dia.
Methane Orifice, 15 in
(0.38m) Plume
Butane N/A*1
Ethanol N/A*1
Methanol N/A*1
Hydrogen N/A*1
Diesel N/A*1
Kerosene N/A*1
JP-4 N/A*1
Note: *1: Indoor testing not FM witnessed.
Honeywell® FS24X Plus™ |
FS24X Plus™ 3IR
Outdoor
12 in X 12 in (0.3m X
0.3m)
12 in X 12 in (0.3m X
0.3m)
3/8 in (9.5mm) Dia.
Orifice, 32 in
(0.81m)Plume
3/8 in (9.5mm) Dia.
Orifice, 32 in (0.81m)
Plume
12 in X 12 in (0.3m X
0.3m)
12 in X 12 in (0.3m X
0.3m)
3/8 in (9.5mm) Dia.
Orifice, 32 in (0.81m)
Plume
12 in X 12 in (0.3m X
0.3m)
12 in X 12 in (0.3m X
0.3m)
6 in X 6 in (0.15m X
0.15m)
User Manual
Target
Fire Distance
Sensitivity
Indoor Outdoor
90 ft 200 ft
Very High
(27m) (60m)
67 ft 150 ft
High
(20m) (45m)
45 ft 100 ft
Medium
(13m) (30m)
22 ft 50 ft
Low
(6m) (15m)
90 ft 135 ft
Very High
(27m) (41m)
45 ft 90 ft
Very High
(13m) (27m)
98 ft
N/A*1 Very High
(29m)
135 ft
N/A*1 Very High
(41m)
105 ft
N/A*1 Very High
(32m)
61 ft
N/A*1 Very High
(18m)
150 ft
N/A*1 Very High
(45m)
75 ft
N/A*1 Very High
(22m)
100 ft
N/A*1 Very High
(30m)
Alarm Response
Time
Typical Maximum
5 10
Seconds Seconds
42