Spectrex 40/40R - Single IR Flame Detector - Manual (Page 21)

TM 40/40R, Rev (4) November 2010
Performance Considerations 9
1.5.3 False Alarms Prevention
To prevent false alarms, the detector will not alarm or react to the radiation
sources specified in Table 3.
Table 3: Immunity to False Alarm Sources
Radiation Source
Immunity
Distance ft. (m)
Vehicle headlights (low beam) conforming to
MS53023-1 1.7 (0.5)
Incandescent frosted glass light100 W 1.7 (0.5)
Fluorescent light with white enamel reflector, standard
office or shop, 70 W (or two 35 W) IAD
Arc welding [6 mm ( 5 /
16
") rod; 210 A] 11.5 (3.5)
Grinding metal 1.7 (0.5)
Lit cigar 3.3 (1)
Lit cigarette 1.7 (0.5)
Match, wood, stick including flare up 3.3 (1)
Notes:
• IAD = Immune at Any Distance.
• All sources are chopped from 0 to 20 Hz.