Det-Tronics U7652B, C Unitized UV/IR Flame Detector - Manual (Page 19)

SPECTRAL SENSITIVITY RANGE—
UV: 0.185 to 0.245 micron.
IR:
4.45 microns.
Figure 19 illustrates the spectral response range of
the UV and IR sensors.
CONE OF VISION—
The detector has a nominal 90 degree cone of vision
with the highest sensitivity along its central axis. See
Figure 20.
SENSITIVITY—
The U7652 detects a 1 foot by 1 foot gasoline fire at
50 feet, a 2 foot by 2 foot JP4, 5, or 8 fire at 100 feet,
and a 3 foot by 3 foot JP4, 5, or 8 fire at 150 feet.
RESPONSE TIME—
Response time is a function of fuel, fire size, distance
and orientation of the fire. The detector is field pro-
grammable (using a jumper plug) for a 0.5 or 3 sec-
ond response time when exposed to a saturating fire
signal.
RELAY CONTACT RATING—
One Fire and one Fault relay, each rated 5 amperes
(resistive) at 30 vdc. The Auxiliary relay in the
U7652C is rated 1 ampere at 30 vdc. The Fire and
Auxiliary relays are field programmable for latching or
non-latching operation. In latching operation the relay
is reset by removing operating power for 0.1 second.
ENCLOSURE MATERIAL—
Copper-free aluminum (red) or 316 stainless steel,
with stainless steel mounting bracket.
TEMPERATURE RATING—
Operating: –40°F to +167°F (–40°C to +75°C).
Storage:
–40°F to +185°F (–40°C to +85°C).
HUMIDITY RANGE—
0 to 95% RH. Can withstand 100% condensing
humidity for short periods of time.
CERTIFICATIONS—
FMR:
See Appendix A for details.
CSA: Class I, Division 1, Groups B, C and D;
Class I, Division 2, Groups A, B, C and D
(T4A).
Class II/III, Division 1, Groups E, F, and
G; Class II/III, Division 2, Groups F and G
(T4A).
Enclosure Type 4X
ULC: Explosion-proof for Class I, Division 1,
Groups C and D.
Dust ignition-proof for Class II, Division 1,
Groups E, F, and G.
17 95-8385
5.0 4.0 3.0 2.0 1.5 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1
ATMOSPHERIC
TRANSMISSION
WAVELENGTH (MICRONS)
SOLAR
RADIATION
REACHING
THE EARTH
INFRARED
SENSOR
RESPONSE
VISIBLE INFRARED
ULTRAVIOLET
SENSOR
RESPONSE
ULTRAVIOLET
100
75
50
25
0
A1070
Figure 19—UV and IR Spectral Response Range
0°
15°
30°
45°
15°
30°
45°
VIEWING ANGLE
A1288
100
90
80
70
60
50
40
30
20
10
DETECTION
DISTANCE
(PERCENT)
100% REPRESENTS THE MAXIMUM DETECTION DISTANCE FOR A
GIVEN FIRE. THE SENSITIVITY INCREASES AS THE ANGLE OF
INCIDENCE DECREASES.
Figure 20—Detector Cone of Vision (Gasoline)