Product Overview
22
SharpEye™
Single IR Flame Detector User Guide
2.5
Performance Considerations
This section describes performance aspects of the 40/40R.
2.5.1
Detection Sensitivity
Detection sensitivity is the maximum distance at which the detector reliably
detects a specific size of fire and typical type of fuel (standard fire).
2.5.1.1
Standard Fire
Defined as a 1ft
2
/0.1m
2
n-heptane pan fire, with maximum wind speed of
6.5ft/sec / 2m/sec.
2.5.1.2
Sensitivity Ranges
The detector has 2 response levels:
•
Warning (Pre-alarm)
•
Alarm
The detection distance for the warning level is approximately 10% higher than for
the alarm distance.
The detection distance for the alarm level is 50ft/15m from a standard fire. For
some typical ambient conditions the Zeta parameter as defined in NFPA 72 for
the detector is 0.005 (1/m).
Note:
Zeta parameters may vary significantly with changes in temperature,
air pressure, humidity, visibility conditions, etc.
2.5.1.3
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.
