Babbitt - Model LS2100 - Two-Wire Level Switch - Manual

LLSS22110000 22--WWIIRREE LLEEVVEELL SSWWIITTCCHHOOWWNNEERRSS MMAANNUUAALLIINNSSTTAALLLLAATTIIOONN aanndd CCAALLIIBBRRAATTIIOONNDESCRIPTIONBABBITTINTERNATIONAL, INC.P.O. Box 70094Houston, Texas 77270 USA(713) 467-4438www.Babbittlevel.com General DescriptionThe LS2100 is a 2 –wire point level switch that detects the presence or absence of material in a bin silo, tank orother container. The basic unit is made up of a solid stainless steel probe attached to an explosion proofhousing. Inside the explosion proof housing are all calibration adjustments and sensing electronics.The unit is calibrated in the absence of material touching the probe and the milliamp signal on the 24VDC circuit changes when material is detected.THEORY OF OPERATIONThe LS2100 employs a radio frequency (RF) balanced impedence bridge circuit to detect if theprobe is in contact with the material that is to be sensed. When material is not in contact with the probe, thebridge is balanced by turning the adjustment pot to find the threshold where the red L.E.D. goes out. Whenmaterial is in contact with the probe, the bridge comes unbalanced and the comparing circuit realizes thechange. This causes a change in the milliamp load on the 24VDC circuit.INSTALLATION*CAUTION: ALL INSTALLATION AND WIRING MUST CONFORM TO NEC AND ALLOTHER LOCAL ELECTRICAL CODES. TAKE SPECIAL CARE IN OBSERVINGHAZARDOUS AREA SAFETY PROCEDURES. WE ASSUME NO LIABILITY FORIMPROPERLY INSTALLED OR WIRED UNITS.Inspection and OperationAfter unpacking the LS2100 visually inspect the unit for any damages. Please advise the factory or your localdistributor of any damage.Before installing the unit, a simple operational check can be performed.On the bench, hook up the appropriate power to the Positive and Negative terminals. The operating voltage ofthe LS2100 is 24VDC +/- 8 volts. The green LED should be lit when power is applied to LS2100 (green LEDshould always be on when there is power to LS2100). Hold the unit so that the probe is not in contact with any surfaceand touch the probe. The red LED should change state.1Physical Installation1) The LS2100 is installed into the vessel wall using a ¾” NPT process connection. This can be either a threadedcoupling or a tapped entry such as a flange.2) The insulator should always extend at least 2” through the vessel wall.3) Always check for physical room around the location you have chosen to allow for installation. Allow 3.75” turningradius to screw the probe in and clearance above for the length of the probe.4) CAUTION: Always take the necessary safety precautions when cutting or welding in the coupling for the LS2100.a) Tag and lock out the electrical power to the equipment that services the vessels.b) Check liquid or dry powders that create a gas in the vessel for oxygen as well as the explosion factor.(All dust will explode.)c) Vessels that are cross vented have to be isolated.5) Screw the LS2100 into the connection provided. In dry material applications, no sealant on threads is required. Onliquid, teflon or a good pipe thread sealant may be used.6) The LS2100 has a ¾” conduit entry. When wiring these units, conform to the National Electrical Code and anyother city or company codes.7) Always install the electrical connection into the ¾” conduit entry on the LS2100 so water will not follow theconnection routing into the threads of the conduit hub. To guarantee that condensation and water will stay outsidethe unit, install an EYSM unilet before each LS2100 and fill with explosion proof sealing cement.Removing the Electronics1) Disconnect supply power at main power source2) Disconnect wires from terminal strip3) Unplug blue antenna lead4) Remove green grounding screwTo reinstall, reverse the above procedure.3CALIBRATION INSTRUCTIONSPLEASE READ THE ENTIRE CALIBRATION PROCEDURE BEFORE CALIBRATINGA. Jumper SelectionThe jumper labeled J1 and located adjacent to the potentiometer is used to choose whether the output will be16mA when product is touching the probe or 16mA when product is not touching the probe.1. When the J1 jumper is in the Far Right position and LS2100 is properly calibrated the Red LED will be litand output will be 16mA when product is touching the probe.2. When J1 jumper is in far left position and LS2100 is properly calibrated the Red LED will be off and theoutput will be 8mA when product is touching the probe.3. Sensitivity Calibration (See next Step) should always be performed with J1 jumper in Far Rightposition.4. See Diagram BelowNOTE: Due to the wide variety of applications and possible control or alarm functions, the properjumper selection will depend on your circumstances. Please call your distributor or the factory if youneed assistance.B. Sensitivity CalibrationThe LS2100 should be calibrated when no material is touching the probe, when the unit is installed where it willbe used and the J1 jumper set in the far right (closest to Red LED) position. Needs different wording,unclear.1) Observe the red LED. If it is on, go to step 3.2) If the red LED is off, turn the sensitivity adjustment potentiometer clockwise (CW) until it comes on.3) Turn the sensitivity adjustment pot counter-clockwise (CCW) until the red LED just goes out. This sets theunit to its maximum sensitivity. If in your application this is too sensitive, you can turn the sensitivityadjustment pot further CCW; usually ¼ to ½ turn is sufficient to reduce the units sensitivity. Always bringthe product into contact with the probe after calibration to assure proper performance.6JohnText BoxFar Right Position JohnText BoxFar Left Position WARRANTYAll components of the LS2100 are warranted to be free from defects in material and workmanship for aperiod of two years from the date of purchase . This warranty applies to general purchaser and tocomponents installed, serviced and operated according to instructions.Babbitt International, Inc. will repair or replace, at its option, FOB at its plant or any other locationdesignated, any part which proves to be defective in manufacture or workmanship.All claims must be made in writing within the warranty period. No claims outside of the warranty periodwill be honored.Warranties are not applied to any components which have been damaged by improper installation, use,exposure to unusual atmospheric conditions or components which have been misused, abused, damagedby neglect or accident. This warranty shall not apply to any components which have been altered orrepaired without the prior written consent of Babbitt International, Inc.Babbitt International, Inc. assumes no responsibility or liability for any labor or material back charges,without written authorization. Any products returned must be with prior written authorization.THE FOREGOING IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED,INCLUDING ANY WARRANTIES OF MERCHANTABILITY AND/OR FOR FITNESS FORPARTICULAR PURPOSE, AND BABBITT INTERNATIONAL, INC. ASSUMES NO OTHERLIABILITIES EXPRESSED OR IMPLIED. BABBITT INTERNATIONAL, INC. SHALL NOT BELIABLE FOR NORMAL WEAR AND TEAR, NOR FOR DIRECT, INCIDENTIAL ORCONSEQUENTIAL DAMAGES. IN NO EVENT SHALL BABBITT INTERNATIONALINCORPORATED’S LIABILITY EXCEED THE PRICE OF ITS PRODUCT AT THE TIME OFPURCHASE.7