Emerson Rosemount 975UF Reference Manual page 16

Introduction
June 2021
Other fuels
The detector reacts to other types of fire as follows:
• The baseline fire refers to n-heptane 1 ft.
sensitivity.
• For fuel fire: standard pan fire size: 1 ft.
• For gas flame: 30 in. (0.75 m) high, 10 in. (0.25 m) wide plume fire
• Maximum response time: 3 sec.
Table 1-1: Fuel Sensitivity Ranges
Type of fuel
Gasoline
n-heptane
JP5
Kerosene
Diesel fuel
IPA
(1)
LPG
Polypropylene
Hydrogen
Methanol
Methane
Ethanol 95%
Ammonia
Paper
Silane
(1) 30 in. (0.75 m) high, 10 in. (0.25 m) wide plume fire
(2) 20 in. (0.5 m) high, 8 in. (0.2 m) wide plume fire
1.5.2 Cone of vision
• Horizontal: 100 °
16
(1)
1
(2)
(2)
2 2
(0.1 m ) and is defined as 100 percent
2 2
(0.1 m )
Max. distance (ft. / m)
66 / 20
66 / 20
50 / 15
50 / 15
50 / 15
43 / 13
43 / 13
43 / 13
37 / 11
26 / 8
26 / 8
25 / 7.5
20 / 6
16 / 5
6 / 1.8
Reference Manual
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