Emerson Rosemount 975HR, Справочное руководство

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Table 1-3: Immunity to False Alarm Sources
(continued)
Radiation source Immunity distance ft. (m)
Arc welding (5/16 in. [6 mm] rod; 210 A) See Table 1-4
Ambient light extremes (darkness to bright light
with snow, water, rain, desert glare, and fog) IAD
Bright colored clothing, including red and safety
orange IAD
Electronic flash (180 W-seconds minimum
output) IAD
Movie light, 625 W quartz DWY lamp (Sylvania
S.G. - 55 or equivalent) > 6.5 (2)
Blue-green dome light conforming to
M251073-1 IAD
Flashlight (MX 99 I/U) IAD
Radiation heater, 3,000 W > 3 (1)
Radiation heater, 1,000 W with fan IAD
Quartz lamp (1,000 W) > 3 (1)
Mercury vapor lamp IAD
Grinding metal IAD
Lit cigar > 1 (0.3)
Lit cigarette > 1 (0.3)
Match, wood, stick, including flare up > 13 (4)
1. IAD: Immune at any distance.
2. All sources are chopped from 0 to 20 Hz.
Table 1-4: Welding Immunity Distance
Sensitivity setting Detection range Immunity distance
1 50 ft. (15 m) > 6 ft. (2 m)
2 100 ft. (30 m) > 12 ft. (4 m)
3 150 ft. (45 m) > 17 ft. (6 m)
4 215 ft. (65 m) >25 ft. (7.5 m)
1.5.4 Visual indicators
One three-color LED indicator is located inside the detector window, as shown in Figure
1-4 . The detector statuses are listed in Table 1-5 .
Reference Manual Introduction
00809-0100-4976 June 2021
Rosemount 975HR 21
Legacy