PERFORMANCE
7-1-07
Page 6
REV. 1
2.3 FALSE ALARM PREVENTION
The detector will
not
provide an alarm or a warning signal as a reaction to the radiation sources specified below.
NOTES:
IAD = Immune at Any Distance
All sources are chopped from 0 to 20 Hz.
Table 2-3.1: Immunity to False Alarm Sources
Table 2-3.2: Welding Immunity Distance – 20/20MI-32-S-F
RADIATION SOURCE
IMMUNITY DISTANCE FT (M)
Sunlight
IAD
Indirect or reflected sunlight
IAD
Incandescent frosted glass light, 100 W
IAD
Incandescent clear glass light, rough service, 100 W
IAD
Fluorescent light with white enamel reflector, standard office or shop, 40 W (or two 20 W)
IAD
Electric arc [12mm (15/32 in) gap at 4000 V alternating current, 60 Hz]
IAD
Arc welding [4 mm (5/32 in) rod; 240 A]
See Table 2-3.2
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)
Flashlight (MX 991/U)
IAD
Radiation heater, 1500 W
IAD
Radiation heater, 1000 W with fan
IAD
Quartz lamp (1000 W)
10 (3)
Mercury vapor lamp
IAD
Grinding metal
IAD
Lit cigar
1 (0.3)
Lit cigarette
1 (0.3)
Match, wood, stick including flare up
10 (3)
SENSITIVITY
DETECTION RANGE
IMMUNITY DISTANCE
10
33 ft
(10 m)
>10 ft
(3 m)
