Omega Vehicle Security LVP-51 Series specifications Installation, Electrical

INSTALLATION

Step Four

OMEGA's LVP-51 series level switch may be installed anywhere on a tank wall using the supplied PE fitting that the switch slides into. The fitting comes with adhesive on the tank side that is sufficient to hold the sensor in position temporarily while the installation is tested, but for permanent installation the fitting must be welded, glassed or strapped to the tank. Extra fittings are available from Omega, so that the level switch may be moved to different locations on the tank by sliding it into other fittings.

Attach the fitting to the tank:

1.Determine the mounting location for the level switch. The point of actuation (where the sensor will send a “wet” signal) is most

often at the center of the sensor;
however the actual Point of
Actuation (POA) may differ	Weld
depending on the application liq-
	Fitting
uid and tank wall characteristics.
After positioning the fitting to
check clearances, etc., remove the
paper protective strips from the	Sensor
adhesive of the fitting.
2. Press the fitting into place. The	Screw
adhesive provides a seal between	1/2" NPT
the sensor and the tank wall, and	Connector
will hold it in place during testing
and installation.

ELECTRICAL

Step Five

Supply Voltage:

The supply voltage to the LVP-51 series level switch should never exceed a maximum of 36 VDC. Omega controllers have a built-in 13.5 VDC power supply which provides power to all of OMEGA's electri- cally powered sensors. Alternative controllers and power supplies, with a minimum output of 12 VDC up to a maximum output of 36 VDC, may also be used with the LVP-51 series level switch.

Required Cable Length:

Determine the length of cable required between the LVP-51 series level switch and its point of termination. Allow enough slack to ensure the easy installation, removal and/or maintenance of the sen- sor. The cable length may be extended up to a maximum of 1000 feet, using a well-insulated, 14 to 20 gauge shielded four conductor cable.

Wire Stripping:

Using a 10 gauge wire stripper, carefully remove the outer layer of insulation from the last 1-1/4" of the sensor's cable. Unwrap and dis- card the exposed foil shield from around the signal wires, leaving the drain wire attached if desired. With a 20 gauge wire stripper, remove the last 1/4" of the colored insulation from the signal wires.

Signal Outputs (Current sensing):

The standard method used by Omega controllers; this technology uses only two wires (Red and Black). The sensor draws 5 mA when it is dry, and 19 mA when wet. NC/NO status must be set by the controller. The Green and White wires are not used.

If desired, the sensor may be installed temporarily without weld- ing the fitting to the wall. If several different locations must be tried before permanent installation, use double-sided foam stick tape designed for PE, for example Arclad type PE-6024, CO#7331 (from Adhesive Research Inc., Glen Rock PA 17327) or equivalent.

Shield Ground

Red

+

24 VDC

- Power Supply

-

Multimeter

3. After the sensor has been tested to verify the POA, weld, glass or

strap the fitting to the tank using standard industrial plastic tech-

Black

+

(mA)

niques.

Special note for small round tanks:

The fitting may be attached to small, round tanks, as long as the majority of the fitting is firmly attached to the wall. However, extreme installations may effect the switches performance.

Mount the sensor in the fitting:

1.	Slide the sensor into the fitting.
2.	After trimming the sensor wire to length if needed by the installa-

Signal Outputs (Relay switching):

Allows the sensor to switch a small load on or off directly, using an internal 1 A relay (60 VAC/60 VDC). All models, LVP-51 series- _005, use the relay and features 4 wires (red, black, white and green) and a shield wire. The NO/NC status is set by the polarity of the volt- age feeding the Red and Black wires. The Green wire is the common for the relay and the White is the NO or NC, depending on the polar- ity of Red and Black.

tion, thread the sensor wire into a plastic flexible conduit with a

1/2" male fitting. Screw the conduit into the sensor, being careful

not to cross the threads. Do not over tighten the conduit in the

sensor as this may break the fitting. Such damage is not covered

by the warranty. Take care while pulling the wire through conduit

that no excessive tension is placed on the sensor end of the wire,

so that the wire is not broken from the sensor housing.

Normally Open Wiring:

	Red
	Black
Shield	White
Ground

+

24 VDC

- Power Supply

-

Multimeter

3. Connect the sensor wire to the controller following the instruc-

tions in its manual. See the following Wiring Section for detailed

Green

+

(Continuity)

wiring instructions.

Normally Open Wiring:

	Black
	Red
Shield	White
Ground

+

24 VDC

- Power Supply

-

Multimeter

Green

+

(Continuity)