Spectrex SharpEye 40/40I, User Manual

Page: 22 / 85

SharpEye
TM
IR3 Flame Detector User Guide
22 Performance Considerations
Alarm response times for a standard fire at a specified range are shown
Table 2.
Table 2: Sensitivity Range Levels
Level Response Time (sec)
Sensitivity Range: ft/m
(for 1ft
2
/0.1m
2
n-heptane pan
fire)
1 3 50/15
2 (default) 5 100/30
3 8 150/45
4 10 215/65
For some typical ambient conditions, the Zeta parameter as defined in NFPA
72 for the detector is 0.005 (1/meter).
Note : Zeta parameters may vary significantly with changes in temperature,
air pressure, humidity, visibility conditions, etc.
1.5.1.3 Other Fuels
The detector reacts to other types of fire as follows:
 The baseline fire refers to n-heptane 1ft
2
/0.1m
2
and is defined as 100%
sensitivity.
 For fuel fire – standard pan fire size: 1ft
2
/0.1m
2
.
 For gas flame – 30 ”/ 0.75m high, 10 ”/ 0.25m width plume fire.
 Maximum Response Time: 10 sec.
Table 3: Fuel Sensitivity Ranges
Type of Fuel
Percent of Max. Distance
at Each Sensitivity Range
Max. Distance
(ft/m)
Gasoline 100% 215/65
N-Heptane 100% 215/65
JP5 70% 150/45
Kerosene 70% 150/45
Diesel Fuel 70% 150/45
Methane* 70% 150/45
LPG* 70% 150/45
Ethanol 95% 60% 135/40
IPA 60% 135/40
Methanol 55% 115/35
Polypropylene 55% 115/35
Paper 38% 83/25
*30 ”/ 0.75m high, 10 ”/ 0.25m width plume fire
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