Det-Tronics U7602E Unitized UV Flame Detector/Controller - Manual (Page 14)

TEMPERATURE RANGE—
Standard Model: –40°F to +167°F (–40°C to +75°C).
High Temperature Model:
–40°F to +257°F (–40°C to +125°C).
Storage: –67°F to +185°F (–55°C to +85°C).
Turbine applications high temperature exposure limited
to 3 hour intervals.
HUMIDITY RANGE—
0 to 100% relative humidity.
SPECTRAL SENSITIVITY RANGE—
UV radiation over the wavelength range from 1850 to
2450 angstroms.
CONE OF VISION—
90 degrees, with highest sensitivity along the central
axis (gasoline, methane). See Figure 11.
FLAME SENSITIVITY—
The detector has 4 field adjustable sensitivity settings.
Refer to Table 5 for response characteristics when the
highest sensitivity level is selected.
RESPONSE TIME—
The detector is field selectable for a 0 to 7 second time
delay (in 1 second increments).
POWER ON TIME DELAY—
0.5 second.
ENCLOSURE MATERIAL—
Copper-free aluminum or 316 stainless steel. Optional
stainless steel mounting bracket used with both
housings.
CERTIFICATION—
FMR:
Reference Appendix A.
CSA:
Standard Temperature Version
Class I, Div. 1, Groups B, C and D.
Class I, Div. 2, Groups A, B, C & D (T3C).
Class II/III, Div. 1, Groups E, F and G.
Class II/III, Div. 2, Groups F and G (T3C).
Enclosure Type 4X.
High Temperature Version
Class I, Div. 1, Groups B, C and D.
Class I, Div. 2, Groups A, B, C & D (T3).
Class II/III, Div. 1, Groups E, F and G.
Class II/III, Div. 2, Groups F and G (T3).
Enclosure Type 4X.
CENELEC:
Standard Model:
EExd IIB + H2 T6 (Tamb = –40°C to +75°C)
Extended Temperature Model:
EExd IIB + H2 T6 (Tamb = –40°C to +75°C)
EExd IIB + H2 T4 (Tamb = –40°C to +125°C)
IP66.
Special conditions for safe use—
The detector contains capacitors that could be
a source of ignition if the enclosure is opened
inside the hazardous area. The enclosure must
not be opened, even if isolated when a
flammable atmosphere is present.
The cable must only be connected to the
enclosure by a flameproof cable entry device
certified to EN50 018. If only one cable entry
hole is used, the other hole must be closed by a
certified flameproof stopping plug.
The flame detector is available in two versions –
one for ambient temperatures up to +75°C and
one for temperatures up to +125°C. The
marking plate will show the actual allowed
ambient temperature.
12
0°
15°
30°
45°
15°
30°
45°
B1684
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 11—U7602E Detector Cone of Vision
Table 5—U7602E Typical Response Distance When Set on Very High
Material Distance
Feet Meters
Gasoline 90 27
Methane 80 24
Diesel 65 20
Methanol 65 20
Acetone 60 18
Toluene 50 15
Wood Shavings (excelsior) 50 15