Omega LTU-101, LVF-210, LVU-150, LVC-100, LVC-152 warranty Safety Precautions, Introduction

SAFETY PRECAUTIONS

Step Three

About this Manual:

PLEASE READ THE ENTIRE MANUAL PRIOR TO INSTALLING OR USING THIS PRODUCT. This manual includes information on all models of Omega’s powered level switches: LTU-101 series, LVU-150 series, LVC-152 series, LVC- 100 series and LVF-210 series. 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, perform 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. Use a proper sealant with all installations. Never overtighten the sensor within the fitting, beyond a maximum of 80 inch-pounds torque. Always check for leaks prior to system start-up.

Material Compatibility:

The LVU-150, LVC-100 and LVF-210 series sensors are available in two different wetted materials. Models LVU-150/-152, LVC- 101/-103 and LVF-210/-212 are made of Polypropylene(PP). Models LVU-151/-153, LVC-102/-104 and LVF-211/-213 are made of Perfluoroalkoxy(PFA), also known by the trade name Teflon. The LTU-101 series is made of PP with the forks made of Ryton (40% glass filled) and the LVC-152 series is made of PP. Make sure that the model you have selected is compatible with the application liquid. To determine the chemical compatibility between the sensor and its application liquids, refer to an industry reference.

Wiring and Electrical:

The supply voltage used to power the 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:

DO NOT USE THE LTU-101, LVU-150, LVC-152, LVC-100 OR LVF-210 SERIES GENERAL PURPOSE SWITCH IN HAZ- ARDOUS LOCATIONS.

WARNING

The rating for the relay is 120 VAC/60 VDC @ 1A. For CE rated applications, the relay rating is 60 VAC/60 VDC @ 1A.

Omega’s powered level switches are not recommended for use with electrically charged application liquids. For most reliable operation, the liquid being measured may need to be electrical- ly grounded.

INTRODUCTION

Step Four

Vibration Switch:

The Tuning Fork vibration switch operates at a nominal frequency of 400 Hz. As the switch becomes immersed in a liquid or slurry, a cor- responding frequency shift occurs. When the measured frequency shift reaches the set point value, the switch changes state indicating the presence of a liquid or slurry medium.

Do not squeeze the forks together. Doing so could damage or break the sensor and void the warranty.

When powering up the LTU-101 series, the start-up procedure requires the switch to cycle through a wet condition for 1/2 second in order to determine an initial resonance.

Ultrasonic Switch:

The Ultrasonic level switch generates a 1.5 MHz ultrasonic wave from a miniature piezoelectric transducer located on one side of the gap in its sensing tip. Another piezo transducer located on the other side of the gap acts as a microphone, picking up the sound. When liq- uid enters the gap in the sensing tip, the audio level changes.

The sensor should be installed so that the liquid will drip out of the gap when the sensor becomes dry.

Optic Switch:

The Optic Leak Detector use principles of optical refraction to detect the presence or absence of fluid. A pulsed infrared light beam is inter- nally generated by a light emitting diode and aimed at the slanted optical tip of the sensor. If the tip is dry, the light beam bounces at a 90 degree angle to a receiving photo transistor, indicating a dry con- dition. If the tip is immersed in liquid, the light beam will refract out into the liquid instead of being reflected to the photo transistor, indi- cating a wet condition.

The Optic Leak Detector can not detect the presence or absence of specular application liquids that reflect light (such as milk), or viscous liquids (such as paint) that form a coating on the sensor tip.

SuperGuard Capacitance Switch:

The SuperGuard level switch generates a pulse-wave radio frequency signal from the capacitance electrode located in the sensing tip of each sensor. When liquid comes into contact with the sensing tip, the capacitance as measured by the sensor changes based on the dielec- tric constant of the liquid. The guard circuit rejects the negative effects of coating buildup on the probe by eliminating the coating sig- nal path between the active and reference electrodes.

Intrusive RF Capacitance Switch:

The Intrusive RF Capacitance level switch generates a 300 kHz pulse- wave radio frequency signal from the capacitance electrode located in the sensing tip of each sensor. When liquid comes into contact with the sensing tip, the capacitance as measured by the sensor changes based on the dielectric constant of the liquid.

The sensor’s operation may vary based on the dielectric prop- erties of various application liquids. The LVC-152 series & LVC-100 series sensor is factory-calibrated to be used with liq- uids with a dielectric value between 20 and 80.

Liquids with a dielectric constant less than 20 will not be detected by an LVC-152 series & LVC-100 series sen- sor, as factory calibrated.