Related Manuals for BABBITT LS7500
Summary of Contents for BABBITT LS7500
- Page 1 Reference Manual 2020 Rev.2 LS7500 Presence/Absence Switch OWNERS MANUAL ♦ INSTALLATION ♦ CALIBRATION ♦ TROUBLESHOOTING ♦ WARRANTY P.O. Box 70094 Houston, TX 77270 (713) 467-4438...
- Page 2 High voltage that may be present on leads could cause electrical shock. Make sure the main power to the Babbitt LS7500 Presence/Absence switch is off and the lines to any other external power source are disconnected or not powered while wiring the instrument.
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Page 3: Table Of Contents
A. Inspection and Operation Check ------------------------------- 3 B. Physical Installation ----------------------------------------------3 C. Removing Electronics -------------------------------------------- 4 D. Typical Applications and Wiring Diagrams -------------------4 1) LS7500 Terminal Layout --------------------------------4 2) Ladder Diagrams -------------------------------------- 6-7 4. Calibration -------------------------------------------------------------------8 A. Setting the Time Delay ------------------------------------------ 8 B. -
Page 4: Description
A. General Description The LS7500 is a level switch that detects the presence or absence of material in a pipe. The basic unit is made up of a solid stainless steel flange attached to an explosion proof housing. Inside the explosion proof housing are all calibration adjustments and sensing electronics. - Page 5 www.babbittinternational.com Reference Manual 2020 Rev.2...
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Page 6: Theory Of Operation
APPLICATION. (See calibration instructions, section 4, A) On the bench, hook up the appropriate power to L1 and L2. The operating voltage of the LS7500 is marked on the power supply board. Hold the unit so that the probe is not touching any surface and press the test switch. -
Page 7: Removing Electronics
D. Typical Applications and Wiring Diagrams LS7500 TERMINAL LAYOUT *NOTE: EACH LS7500 POWER SUPPLY IS INTENDED FOR ONLY ONE SUPPLY VOLTAGE. THIS VOLTAGE IS PRINTED ON THE POWER SUPPLY BOARD. FOR 115 VAC OR 230 VAC UNITS, HOOK UP THE HOT LEAD TO L1 AND THE NEUTRAL TO L2, WITH APPROPRIATE GROUND. - Page 8 Reference Manual 2020 Rev.2 NOTE: LS7000 AND LS7500 ELECTRONIC COMPONENTS ARE INTERCHANGABLE.
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Page 9: Ladder Diagrams
www.babbittinternational.com Reference Manual 2020 Rev.2... - Page 10 www.babbittinternational.com Reference Manual 2020 Rev.2...
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Page 11: Calibration
2020 Rev.2 4. CALIBRATION PLEASE READ THE ENTIRE CALIBRATION PROCEDURE BEFORE CALIBRATING THE LS7500. If no time delay is required, turn the time adjustment pot completely CCW and set S1 down, S2 up. The potentiometer has 18 turns and freewheels at the end of its travel without damage. You may hear “clicks” at the end of travel. -
Page 12: Sensitivity Calibration
2020 Rev.2 C. Sensitivity Calibration The LS7500 should be calibrated when no material is touching the sensing element and when the unit is installed where it will be used. NOTE: Dirty pipe calibration – DO NOT CLEAN SENSING ELEMENT – simply follow the same procedure below with the buildup in place. -
Page 13: Maintenance And Troubleshooting
No routine maintenance is required other than keeping the interior of the unit clean and free of dirt, dust and other contaminants. The LS7500 consists of three main sub-assemblies. These are the enclosure with the flange assembly, the power supply board and the sensing card. The following troubleshooting guide will assist in determining how to correct most of the problems which may occur in the field. -
Page 14: Warranty
2020 Rev.2 6. WARRANTY All components of the LS7500 are warranted to be free from defects in material and workmanship for a period of two years from the date of purchase . This warranty applies to general purchaser and to components installed, serviced and operated according to instructions.
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