Det-Tronics U7698A, B, C, E Unitized Frequency IR Detector/Controller - Manual (Page 6)

FLAME SENSITIVITY—
The U7698B detects a 1 foot by 1 foot gasoline fire at 65
feet, a 1 foot by 1 foot diesel fire at 60 feet, a 1 foot by 1
foot methanol fire at 50 feet.
RESPONSE TIME—
The response time of the detector is a function of fuel,
fire size, distance, and orientation of the fire source.
Typically, the U7698 will respond in 3 seconds to a high
intensity flickering IR source and within 8 to 10 seconds
to a 1 square foot gasoline fire at 65 feet (approximately
0.1 square meter at 20 meters).
TEMPERATURE RANGE—
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%, can withstand 100% condensing humidity for
short periods of time.
ENCLOSURE MATERIALS—
Anodized aluminum or 316 stainless steel, with stainless
steel mounting brackets.
CERTIFICATION—
VDS:
Performance verified to EN 54-10.
CSA: Class I, Division 1, Groups C and D;
Class II, Division 1, Groups E, F, and G;
NEMA 4.
CENELEC: DEMKO 03 ATEX 135331X
II 2 G EEx d IIC T4-T6
T6 (Tamb –55°C to +60°C)
T5 (Tamb –55°C to +75°C)
T4 (Tamb –55°C to +125°C)
II 2 D T130°C.
IP66.
Special Conditions for Safe Use:
• The Model U7698A/B/C Flame Detectors have an
ambient temperature rating for performance of
–40°C to +75°C.
• The maximum surface temperature designation T
130°C is based on the maximum ambient tempera-
ture of 75°C and under dust layers with up to 5mm
thickness.
• Precautions must be taken to ensure that the elec-
tronics will not operate at ambient temperatures
exceeding 110°C.
• For use in Dust environments the Models
U7698A/B/C Flame Detectors are to be used only in
Zone 21 (Category 2) or Zone 22 (Category 3) appli-
cations.
DIMENSIONS—
See Figure 5.
WIRING—
16 to 22 AWG. Shielded cable is recommended to pro-
vide increased immunity to RFI and EMI. A conduit entry
adapter is located on one side of the detector/controller
and a stop plug is located on the other. A second con-
duit entry adapter can be added by replacing the stop
plug with an adapter. See Figure 5 for thread sizes.
The adapter and plug are also used to tighten the detec-
tor/controller to the mounting bracket in a fixed position.
VIBRATION—
The U7698B meets MIL-STD-810C for vibration.
SHIPPING WEIGHT (Approximate)—
Pounds Kilograms
Aluminum 4.0 1.8
Stainless steel 8.1 3.7
3.25
(82.6)
7.62
(193.5)
4.84
(122.9)
5.25
(133.3)
1.65
(41.9)
1.0
(25.4)
0.5
(12.7)
1.0
(25.4)
0.53
(13.5)
0.28
(7.14)
2.5
(64) DIA.
0.34
(8.64)
0.5
(12.7)
MOUNTING KEYHOLES (2)
2.0 (50.8) APART (SEE DETAIL "A")
B1014
1/2 — NPSF
3/4 — NPSF
20 MM FEMALE
25 MM FEMALE
Pg 16
*
*
DETAIL "A"
Figure 5—U7698B Dimensions in Inches (Millimeters)
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