Spectrex 20/20L (LB) - UV/IR Flame Detector - Manual (Page 18)

Spectrex Inc. - SharpEye TM UV/IR Flame Detector Manual – TM20/20LB Rev E, August 2004
10
3.3 False Alarms
The detector does not provide an alarm or a warning signal as a reaction to the
radiation sources specified at Table 2 below.
Notes:
IAD = Immune at any distance.
All sources are chopped from 0 to 20 Hz.
Table 2. Immunity to False Alarm Faults
Radiation Source Immunity
Distance ft. (m)
Sunlight IAD
Indirect or reflected sunlight
IAD
Vehicle headlights (low beam) conforming to MS53023-1 IAD
Incandescent frosted glass light, 100W IAD
Incandescent clear glass light, rough service, 100W IAD
Fluorescent light with white enamel reflector, standard office
or shop, 40W (or two 20W) IAD
Arc welding [4mm (5/32in) rod; 240A] 9.8ft (3m)
Bright colored clothing, including red and safety orange IAD
Electronic flash (180 watt seconds minimum output) IAD
Red dome light conforming to M251073-1 IAD
Blue-green dome light conforming to M251073-1 IAD
Flashlight (Mx 991/U) IAD
Radiation heater, 1500W IAD
Radiation heater, 1000W with fan IAD
Grinding metal 3.3ft (1m)
Lit cigar or cigarette IAD
Match, wood, stick including flare up 3.3ft (1m)