Omega Vehicle Security LVP-51 Series - Manual (Page 3)

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INTRODUCTION Step One
About Non‐Intrusive RF Capacitance Technology: OMEGA ENGINEERING's LVP‐51‐R level switch generates a
high radio frequency signal from the capacitance electrode on the tank side of each sensor. Depending on the
thickness of the tank wall and the material of which it is made, there is a particular minimum dielectric value
the electrode measures when there is no liquid on the other side of the tank wall from the sensor. When liquid
is on the other side of the wall, the dielectric value rises.
As part of installation, a two‐step calibration procedure ensures that the threshold between wet and dry is set
at the ideal point for your particular tank and application fluid, without the use of any external test
equipment. The sensor’s operation and point of actuation may vary based on the dielectric properties of
various application liquids, tank materials and thicknesses. The LVP‐51‐R sensor is intended to be used with
liquids with a dielectric value between 20 and 80. Due to its user calibration capability it may be able to detect
liquids below a dielectric constant of 20 under certain conditions, but this must be verified by
experimentation.
Table of Contents
Specifications & Dimensions: ................................................................................................................................. 4
Safety Precautions: ................................................................................................................................................ 5
Make a Fail‐Safe System: ........................................................................................................................... 6
Components: .............................................................................................................................................. 6
Installation: ............................................................................................................................................................ 7
Attach fitting to Tank: ................................................................................................................................ 7
Mount Sensor in Fitting: ............................................................................................................................ 7
Electrical: ................................................................................................................................................................ 8
Signal Output (current sensing): ................................................................................................................ 8
Signal Output (relay switching): ................................................................................................................. 9
Wiring: .................................................................................................................................................................. 10
Wiring to a OMEGA ENGINEERING Controller: ........................................................................................ 10
Switching Inductive Loads: ....................................................................................................................... 10
Wiring the Relay Output: ......................................................................................................................... 11
Wiring as a P‐Channel or N‐Channel Output: .......................................................................................... 12
Calibration: ........................................................................................................................................................... 13
Maintenance: ....................................................................................................................................................... 14
Checking Point of Actuation: ................................................................................................................................... 14
Testing the Sensor: .................................................................................................................................................. 14
Maintenance: .......................................................................................................................................................... 14