Omega Vehicle Security Stud Sensor LV132 User Manual

LV132  
Electro-Optic Conductivity Sensor  
Instruction Sheet M1800/1299  
DESCRIPTION  
The compact, LV132 Conductivity Sensor, with built-in electronics, is ideal for leak detection applications. It combines electro-optic  
and conductive technologies and can discriminate between hydrocarbons and water. The sensor is compatible with a broad range of  
conductive and non-conductive liquids. It is also suitable for high, low or intermediate level detection in practically any tank - large or  
small. Installation is simple and quick through the tank top, bottom or side. With no moving parts, the sensor is ideal for interstitial  
applications. The pull ring facilitates easy installation in double-wall tanks and pipes, yet can be removed for use in 1/4" NPT holes.  
SENSOR OPERATING PRINCIPLE  
The sensor has the capability of discriminating between conductive and non-conductive liquids, such as water and gasoline. Con-  
ductivity probes are used in conjunction with an optical prism, consisting of a light-emitting diode and phototransistor. The prism  
detects liquid via a loss of light intensity on the phototransistor (due to refraction). The sensor has two outputs: one for conductive  
liquid and one for non-conductive liquid. Both outputs are TTL/CMOS compatible.  
WARNING  
The nature of the sensor is that it is a non-voltage producing device, containing limited energy-storing components. However, since its  
primary use is in a hazardous location, an appropriate intrinsically safe interface device must be used and installed in strict accordance  
with the National Electrical Code and applicable OMEGA technical brochure and instruction bulletin. Failure to observe this warning could  
result in serious injury or damages.  
UNPACKING  
Remove the Packing List and verify that you have received all equipment. If you have any questions about the shipment, please call  
the OMEGA Customer Service Department at 1-800-622-2378 or (203) 359-1660.  
When you receive the shipment, inspect the container and equipment for any signs of damage. Note any evidence of rough handling  
in transit. Immediately report any damage to the shipping agent.  
NOTE  
The carrier will not honor any claims unless all shipping material is saved for their examination. After examining and removing  
contents, save packing material and carton in the event reshipment is necessary.  
INSTALLATION - Running of Field Wire  
A. The conductors of the intrinsically safe circuit should be sealed in a rigid metal conduit at the point where the wiring enters the  
hazardous area. The wiring and contacting device should be such that conductive dusts in the area will not close the circuit in  
place of the contacts.  
B. Hazardous area field wiring will store energy due to distributed capacitance and inductance in proportion to its length. The  
maximum run of cable has been defined at 750 feet between barrier and sensor.  
C. Shielded cable is not required, but if used in the application, the shield must be returned to ground. The shield must be con-  
nected to barrier earth ground.  
D. Intrinsically safe wiring must be installed in accordance with Article 504 of the NEC, ANSI/NFPA-70 or CEC Part 1, as applicable.  
All intrinsically safe wiring must have 0.01 inch minimum insulation thickness. Non-intrinsically safe wiring cannot be run in  
conduit or open raceways together with intrinsically safe wiring.  
U.L. Entity Parameters  
For CSA intrinsic safety approval,  
Vmax Voc (barrier)  
Terminal  
Imax  
38V 150mA .052µ  
150mA .052µ  
Ci  
Vmax  
Li  
0
the following barriers must be used:  
SBG111950 and SBG111954  
Red/Black  
Green/Black  
White/Black  
Imax Isc (barrier)  
C
C
38V  
0
Ci + cable < ( A barrier)  
L
L
38V 150mA .052µ  
0
Li + cable < ( A barrier)  
Zener Barrier Wiring Diagram  
Zener Barrier*  
+
Note  
DC  
Power  
Supply  
Source voltage not greater than  
250 VAC. Zener barriers must be  
installed in accordance with barrier  
manufacturer's instructions.  
Red  
_
GND  
Earth Ground  
Black  
Green  
Non-Conductive  
Liquid Output  
Zener Barrier**  
White  
Earth  
Ground  
*Use OMEGA P/N SBG111954  
for CSA approval.  
Conductive  
Liquid Output  
**Use OMEGA P/N SBG111950  
for CSA approval.  
Earth Ground  
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