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PRINCIPLES OF OPERATION

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                                        For Ultrasonic Point Level Switches 

The Level switches operates using ultrasonic sound wave propagation.  Ultrasonic

sound waves are greatly attenuated when transmitted through air.  Conversely,

when liquid is present, transmission of the sound waves is greatly enhanced.  The

electronic control unit, either integral or remote to the sensor, generates electrical

signals that are converted to bursts of ultrasonic energy at the sensor.  The ultra-

sonic bursts are transmitted across the liquid sensing gap of the sensor.  Upon

receipt of a valid signal at the receiver, the solid state electronics generate a “data

enable” condition indicating liquid is present.  This signal energizes a relay and\or

provides an output condition.

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INSTALLATION

GENERAL

All units are easy to install.  A sensor with an integral electronic control unit or a
sensor with a remote control unit can be mounted in any position or orientation
desired.

Make sure that all wiring, conduit and electrical fittings conform to local electrical
codes for the location selected.  

VISUAL INSPECTION

Unpack the control unit and sensor assemblies.  Visually inspect them for any
damage.  Advise Cosense immediately if either assembly is damaged.

PRELIMINARY OPERATIONAL CHECK

Before installing the unit, a simple operational checkout should be performed as
follows:

WARNING: In a hazardous environment never open the housing cover or con-
nect the power leads without first disconnecting the electrical power at its
source.

1. Fill a container with liquid.
2. Open the control unit housing cover and connect the power to the control unit

(see appropriate wiring diagram for your unit).

3. Apply power from the source.
4. Place the sensor in the liquid.  The relay should energize, or output will switch

to 20.0±1.0mA.

5. Remove the sensor from the liquid.  The relay will de-energize or output will

switch back to 4.0±1.0mA indicating that the system is functioning properly.
If you do not experience the results indicated in Steps 4 and 5, contact
Cosense immediately.

6. Disconnect the power to the control unit.
7. Proceed to final installation.

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Содержание LVU-230

Страница 1: ...omega com e mail info omega com For latest product manuals omegamanual info LVUC10 Ultrasonic Point Level Switches Shop online at User sGuide LL 100 Series LVU 260 LVU 230 ...

Страница 2: ...nce TEL 33 0 1 61 37 2900 FAX 33 0 1 30 57 5427 Toll Free in France 0800 466 342 e mail sales omega fr Germany Austria Daimlerstrasse 26 D 75392 Deckenpfronn Germany TEL 49 0 7056 9398 0 FAX 49 0 7056 9398 29 Toll Free in Germany 0800 639 7678 e mail info omega de United Kingdom One Omega Drive River Bend Technology Centre ISO 9002 Certified Northbank Irlam Manchester M44 5BD United Kingdom TEL 44...

Страница 3: ...questions about the shipment please call the Omega Customer Service Department When you receive the shipment inspect the container and equipment for 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 damage claims unless all shipping material is saved for inspection After examining and removing contents...

Страница 4: ...nic Point Level Switches Page Chapter 1 Point Level Model Description 4 Chapter 2 Principles of Operation 5 Chapter 3 Installation 5 7 Chapter 4 System Wiring Diagram 8 10 Chapter 5 Dimensional Drawings 11 12 Chapter 6 Maintenance 13 ...

Страница 5: ...nt allows the monitoring of percentage solids in the contents of the liquid Its small size standard 3 4 NPT mounting fitting and ability to be installed vertically or horizontally makes it the perfect choice for new or existing applications MODEL FUNCTION TYPE INPUT OUTPUT AGENCY APPROVAL LVU 230 Standard Point Integral 115VAC 230VAC 10A DPDT CE Level Gap Sensor Remote 24VDC 12VDC LVU 260 Loop Pow...

Страница 6: ...e that all wiring conduit and electrical fittings conform to local electrical codes for the location selected VISUAL INSPECTION Unpack the control unit and sensor assemblies Visually inspect them for any damage Advise Cosense immediately if either assembly is damaged PRELIMINARY OPERATIONAL CHECK Before installing the unit a simple operational checkout should be performed as follows WARNING In a h...

Страница 7: ...e there is adequate clearance for wiring 2 Remove the PC board by removing the screws Drill a suitable size hole in the control unit housing for a conduit fitting if so required 3 Remove the cover from housing To complete wiring either leave or remove the electronics printed circuit board in the housing on remote units and remove the encapsulate electronics in integral units CAUTION Never remove u...

Страница 8: ...energized or output will switch to 20 0 1 0 mA Turn the potentiometer one more turn clockwise 5 Allow the liquid or sludge to fall below the sensing point relay should be de energized or output will switch back to 4 0 1 0 mA If not turn the poten tiometer counter clockwise until the relay is de energized Turn the poten tiometer counter clockwise one half turn 6 Repeat Steps 4 and 5 for a final adj...

Страница 9: ...SYSTEM WIRING DIAGRAM 8 For Ultrasonic Point Level Switches 4 ...

Страница 10: ...SYSTEM WIRING DIAGRAM 9 For Ultrasonic Point Level Switches 4 ...

Страница 11: ...SYSTEM WIRING DIAGRAM 10 For Ultrasonic Point Level Switches 4 ...

Страница 12: ...DIMENSIONAL DRAWINGS 11 For Ultrasonic Point Level Switches 5 ...

Страница 13: ...DIMENSIONAL DRAWINGS 12 For Ultrasonic Point Level Switches 5 ...

Страница 14: ...e sensor No other maintenance is required CLEANING If the pipe or vessel to which the unit is mounted is to be steam cleaned or cleaned with abrasive detergents remove the entire unit before cleaning by 1 Disconnecting the power at the source 2 Opening the housing cover 3 Removing the power and control wiring cable 4 Unthreading the sensor To reinstall follow the installation procedures SYSTEM MAL...

Страница 15: ...otherwise shall not exceed the purchase price of the component upon which liability is based In no event shall OMEGA be liable for consequential incidental or special damages CONDITIONS Equipment sold by OMEGA is not intended to be used nor shall it be used 1 as a Basic Component under 10 CFR 21 NRC used in or with any nuclear installation or activity or 2 in medical applications or used on humans...

Страница 16: ...tors 䡺 Turbine Paddlewheel Systems 䡺 Totalizers Batch Controllers pH CONDUCTIVITY 䡺 pH Electrodes Testers Accessories 䡺 Benchtop Laboratory Meters 䡺 Controllers Calibrators Simulators Pumps 䡺 Industrial pH Conductivity Equipment DATA ACQUISITION 䡺 Data Acquisition Engineering Software 䡺 Communications Based Acquisition Systems 䡺 Plug in Cards for Apple IBM Compatibles 䡺 Datalogging Systems 䡺 Recor...

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