Introduction
FV-40 Series Flame Detector
087-0056 REV F
18
1.5.3
False Alarms Prevention
To prevent false alarms, the detector will not alarm or react to the
radiation sources specified in Table 6.
Table 6: False Alarms Prevention
Radiation Source
F4-I3, F4-
MM
Immunity
Distance
ft. (m)
F4-UV, F4-
VB
Immunity
Distance
ft. (m)
F4-2V, F4-
2B, F4-4V,
F4-4B, F4-
UF
Immunity
Dist ft.(m)
Indirect or reflected sunlight IAD
IAD
IAD
Vehicle headlights (low beam) conforming
to MS53023-1
IAD IAD IAD
Incandescent frosted glass light, 300 W
IAD
IAD
IAD
Fluorescent light with white enamel
reflector, standard office or shop, 70 W (or
two 35 W)
IAD IAD IAD
Electric arc [12mm (
15
/
32
") gap at 4000 V
alternating current, 60 Hz]
IAD IAD IAD
Arc welding [6 mm (
5
/
16
") rod; 210 A]
Table 7:
Welding
Immunity
Distance
9.8
(3)
Ambient light extremes (darkness to bright
light with snow, water, rain, desert glare
and fog)
IAD IAD IAD
Bright colored clothing, including red and
safety orange
IAD IAD IAD
Electronic flash (180 watt-seconds
minimum output)
IAD IAD
Movie light, 625 W quartz DWY lamp
(Sylvania S.G.-55 or equivalent)
>6.5 (2)
>6.5 (2)
Blue-green dome light conforming to
M251073-1
IAD IAD IAD
Flashlight (MX 991/U)
IAD
IAD
IAD
Radiation heater, 3000 W
>3 (1)
IAD
IAD
Radiation heater, 1000 W with fan
IAD
IAD
IAD
Quartz lamp (1000 W)
>3 (1)
12 (4)
Mercury vapor lamp
IAD
IAD
Grinding metal
IAD
3.3 ft. (1)
Lit cigar
>1 (0.3)
5 (1.5)
IAD