3600I
Page: 7
1.5.1.1 STANDARD
FIRE
Defined as a 1ft
2
/ 0.1m
2
n-heptane pan fire, with maximum wind speed of 6.5 ft/sec (2
m/sec).
1.5.1.2 SENSITIVITY
RANGES
The detector has four user-selectable sensitivity ranges. For each range there are two
response levels.
•
WARNING
(Pre-alarm)
•
ALARM
The detection distance, for the WARNING level, is approximately 10% higher than the
ALARM distance.
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)
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, and so on.
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 – 20 inch (0.5m) high, 8 inch (0.2m) width plume fire.
•
Maximum Response Time: 10 sec.