FL4000
65
8.4 Response to False Stimuli
The FL4000 detector is immune to a variety of false alarm sources. Below are representative
samples of detector response in the presence of false stimuli.
Table 38: False Alarm Immunity at High Sensitivity
False Alarm Source
Distance
ft (m)
Modulated
Response
Distance
ft (m)
Unmodulated
Response
Heater (1.5 kW)
6 (1.8)
No alarm
1 (0.3)
No alarm
100 W incandescent lamp
1 (0.3)
No alarm
1 (0.3)
No alarm
Fluorescent lamp (2 40-W
bulbs)
< 1 (0.3)
No alarm
< 1 (0.3)
No alarm
500 W halogen lamp
2 (0.6)
No alarm
< 1 (0.3)
No alarm
Sunlight, reflected
6 (1.8)
No alarm
6 (1.8)
No alarm
Sunlight, direct
–
No alarm
–
No alarm
Hot plate (200
°
C)
3 (0.9)
No alarm
1 (0.3)
No alarm
Arc welding (#6012, 1/8 in,
180 – 200 A, DC)
5 (1.5)
No alarm
11 (3.4)
No alarm
Arc welding (#6012, 1/8 in,
190 A, AC)
5 (1.5)
No alarm
9 (2.7)
No alarm
Arc welding (#7014, 1/8 in,
180 – 200 A, DC)
15 (4.6)
No alarm
12 (3.7)
No alarm
Arc welding (#7014, 1/8 in,
190 A, AC)
15 (4.6)
No alarm
15 (4.6)
No alarm
Arc welding (#7018, 1/8 in,
180 – 200 A, DC)
15 (4.6)
No alarm
13 (4.0)
No alarm
Arc welding (#7018, 1/8 in,
190 A, AC)
12 (3.7)
No alarm
10 (3.1)
No alarm