Spectrex 20/20MU - Mini Flame Detector - Manual (Page 19)

Spectrex Inc. - SharpEye TM ML & MU Flame Detector Manual – TM 767100, Rev. A, April 2005
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3.3 False Alarms Prevention
The detector will not provide an alarm or a warning signal as a reaction to the
radiation sources specified below.
False alarm immunity is listed in
- Table 2 for the 20/20 ML UV/IR detector
- Table 3 for the 20/20 MU UV detector
Notes:
IAD = Immune at Any Distance.
All sources are chopped from 0 to 20Hz.
Table 2. 20/20ML - 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)