SAFETY PRECAUTIONS
Step Two
About this Manual:
PLEASE READ THE ENTIRE MANUAL PRIOR TO INSTALLING OR USING THIS PRODUCT. This manual includes information on all models of the LVP-51 series Non- Intrusive RF Capacitance level switch from Omega. Please refer to the part number located on the switch label to verify the exact model which you have purchased.
User’s Responsibility for Safety:
Omega manufactures a wide range of liquid level sensors and tech- nologies. While each of these sensors is designed to operate in a wide variety of applications, it is the user’s responsibility to select a sensor model that is appropriate for the application, install it properly, per- form tests of the installed system, and maintain all components. The failure to do so could result in property damage or serious injury.
Proper Installation and Handling:
Because this is an electrically operated device, only properly- trained staff should install and/or repair this product. The adhesive on the fitting is for temporary installation only. For permanent installation, the fitting for the sensor should be welded, glassed or strapped to the tank itself using approved plastic welding tech- niques. Do not install the LVP-51 series sensor on a metal tank, or within 6" of any metal pipe or fitting.
Mounting Bracket:
The LVP-51 series sensor may be mounted in the PE bracket (poly- ethylene, colored white). Make sure that the fitting is compatible with the tank it will be applied to.
Material Compatibility:
The sensor itself is not designed to be immersed. It should be mounted in such a way that it does not normally come into contact with fluid. Its case is made out of Polysulfone (PSO). Refer to an industry reference to ensure that compounds that may splash onto the controller housing will not damage it. Such damage is not cov- ered by the warranty.
Wiring and Electrical:
The supply voltage used to power the LVP-51 series sensor should never exceed a maximum of 36 volts DC. Electrical wiring of the sensor should be performed in accordance with all applicable national, state, and local codes.
Flammable, Explosive and Hazardous Applications:
The LVP-51 series switch is not rated for use in hazardous loca- tions. Refer to the National Electric Code (NEC) for all applicable installation requirements in hazardous locations. DO NOT USE THE LVP-51 SERIES GENERAL PURPOSE SWITCH IN HAZ- ARDOUS LOCATIONS.
WARNING 
Do not install the LVP-51 series level switch on a metallic tank, or within 6" of any metallic object. Metal will adversely affect the dielectric sensitivity of the sensor.
OMEGA's LVP-51 series sensors are not recommended for use with electrically charged application liquids. For most reliable operation, the liquid being measured may need to be electrically grounded.
INTRODUCTION
Step Three
About Non-Intrusive RF Capacitance Technology:
OMEGA's LVP-51 series level switch generates a high radio frequen- cy signal from the capacitance electrode on the tank side of each sen- sor. 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 series 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.
