Multi IR Hydrocarbon and Hydrogen Flame Detector User Guide
26
Performance Considerations
1.5.3 False Alarm Prevention
To prevent false alarms, the detector will not alarm or react to the radiation
sources specified in Table 4.
Table 4: Immunity to False Alarm Sources
Radiation Source
Immunity
Distance ft/ m
Indirect or reflected sunlight
IAD
Vehicle headlights (low beam) conforming to
MS53023-1
IAD
Incandescent frosted glass light, 300W
IAD
Fluorescent light with white enamel reflector, standard
office or shop, 70W (or 2 35W)
IAD
Electric arc [12mm /
15
/
32
”
gap at 4000V alternating
current, 60Hz]
IAD
Arc welding [6mm /
5
/
16
”
rod; 210A]
See Table 5
Ambient light extremes (darkness to bright light with
snow, water, rain, desert glare, and fog)
IAD
Bright colored clothing, including red and safety
orange
IAD
Electronic flash (180 watt-seconds minimum output)
IAD
Movie light, 625W quartz DWY lamp (Sylvania S.G.-55
or equivalent)
>6.5/2
Blue-green dome light conforming to M251073-1
IAD
Flashlight (MX 991/U)
IAD
Radiation heater, 3000W
>3/1
Radiation heater, 1000W with fan
IAD
Quartz lamp (1000W)
>3/1
Mercury vapor lamp
IAD
Grinding metal
IAD
Lit cigar
>1/0.3
Lit cigarette
>1/0.3
Match, wood, stick including flare up
>13/4
Notes:
IAD = Immune at Any Distance.
All sources are chopped from 0
–
20Hz.
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