Emerson Rosemount 975 - Immunity to False Alarm Sources

C Immunity to false alarm sources
Table C-1: Immunity to false alarm sources
IAD: Immunity at any distance
Radiation source Immunity distance
Rosemount
975MR
Rosemount
975HR
Rosemount
975UF
Rosemount
975UR
Indirect or reflected sunlight IAD IAD IAD IAD
Vehicle headlights (low beam) conforming to
MS53023
IAD IAD IAD IAD
Incandescent frosted glass light, 300 W IAD IAD IAD IAD
Fluorescent light with white enamel reflector,
standard office or shop, 80 W (or two 40 W)
IAD IAD IAD IAD
Electric arc (15/32-in (12 mm)) gap at 4000
Vac, 60 Hz
IAD IAD IAD IAD
Arc welding (5/16-in (6 mm)) rod, 210 A See Table C-2.
Ambient light extremes (darkness to bright
light with snow, water, rain, desert glare, or
fog)
IAD IAD IAD IAD
Bright colored clothing, including red and
safety orange
IAD IAD IAD IAD
Electronic flash (180 W seconds minimum
output)
IAD IAD IAD IAD
Movie light, 625 W quartz DWY lamp (Sylvania
S.G. 55 or equivalent)
>6.5ft (2m) >6.5ft (2m) >13ft (4m) >3ft (1m)
Blue green dome light conforming to
M251073
IAD IAD IAD IAD
Flashlight (MX 991/U) IAD IAD IAD IAD
Radiation heater, 3000 W >3ft (1m) >3ft (1m) IAD IAD
Radiation heater, 1000 W with fan IAD IAD IAD IAD
Quartz lamp (1000 W) >3ft (1m) >3ft (1m) See Table C-3.
Mercury vapor lamp IAD IAD IAD IAD
Grinding metal IAD IAD IAD IAD
Lit cigar >1 ft (0.3 m) >1 ft (0.3 m) IAD IAD
Lit cigarette >1 ft (0.3 m) >1 ft (0.3 m) IAD IAD
Match, wood, stick, including flare up >20ft (6m) >10ft (3m) >7ft (2m) >7ft (2m)
Vehicle exhaust diesel fume
For Rosemount 975MR only
IAD IAD N/A N/A
Table C-2: Welding immunity distance
Level Range Distance
1 >10ft (3m) >1.6 ft (0.5 m)
Manual Immunity to false alarm sources
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Rosemount 975 43