3600I
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1.5.3
FALSE ALARMS 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, 300 W
IAD
Fluorescent light with white enamel reflector, standard office or
shop, 70 W (or two 35 W)
IAD
Electric arc [12mm (
15
/
32
") gap at 4000 V alternating current, 60
Hz]
IAD
Arc welding [6 mm (
5
/
16
") rod; 210 A]
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, 625 W 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, 3000 W
>3 (1)
Radiation heater, 1000 W with fan
IAD
Quartz lamp (1000 W)
>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 to 20 Hz.
