Detector Mode Setup
30
SharpEye
TM
IR3 Flame Detector User Guide
4.3.2
Sensitivity Ranges
The detector offers 4 sensitivity settings. The settings refer to the gasoline
fire of 1ft
2
from 33ft/10m to 132ft/40m for Model 20/20MI-1 and 8.2ft/2.5m
to 33ft/10m for Model 20/20MI-3.
For other types of fuel sensitivity, refer to Table 11.
Table 11: Sensitivity ranges
Sensitivity 20/20MI-1
Detection Range
Sensitivity
20/20MI-3
Detection Range
ft
m
ft
m
10
30
10
2.5
8.2
2.5
20
66
20
5
16.5
5
30
100
30
7.5
24.7
7.5
40
132
40
10
33
10
4.3.3
Alarm Delay
The detector is equipped with an alarm delay option, which provides
programmable time delays of 0
–
30 seconds with 8 fixed settings:
•
0 seconds
•
Anti-flare
•
3 seconds
•
5 seconds
•
10 seconds
•
15 seconds
•
20 seconds
•
30 seconds
When an alarm (detection) level condition is encountered, the detector
delays the execution of the alarm
output’s relay by the specified period of
time. The detector will then evaluate the condition for 3 seconds. If the
alarm level is still present, the alarm outputs are activated. If this condition
no longer exists, the detector returns to its standby state. The alarm delay
option affects the alarm relay and the 4
–
20mA output. The LED indicates
warning level during the delay time only if the fire condition exists.
Anti-Flare
Anti-flare mode is selected to prevent false alarms in locations where fast
flares may be present. The time delay for a fire alarm in this mode is from
2.5
–
15 seconds, and is usually less than 10 seconds.
