Spectrex 20/20F - Fast UV/IR Flame Detector - Manual (Page 15)

Spectrex Inc. - SharpEye TM UV/IR (F) Flame Detector Manual – TM756100 Rev A, July 2005
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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 3 below.
Notes:
IAD = Immune at any distance.
All sources are chopped from 0 to 20 Hz.
* Will be the same immunity distance as indicated when not chopped.
Table 3. Immunity to False Alarm Faults
Radiation Source Immunity
Distance ft. (cm)
Sunlight IAD
Indirect or reflected sunlight
IAD
Vehicle headlights (low beam) conforming to MS53023-1 IAD
Vehicle Infrared light-MS 53024-1 or normal 50 watts IAD
Incandescent frosted glass light, 100W IAD
Flash light IAD
Fluorescent light 40W (or two 20W) IAD
Red dome light conforming to M251073-1 MS 51073-1 IAD
Radiation heater, 1500W IAD
Radiation heater, 1000W with fan IAD
Lit cigar or cigarette IAD
Match, wood, stick including flare up 0.5ft (15cm)