BABBITT LS8500, Owner'S Manual

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www.babbittinternational.com Reference Manual
2021
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5. 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 LS8500 consists of three main sub-assemblies. These are the enclosure with the
flange sensor, the transmitter module and the receiver card. The following troubleshooting guide will assist in
determining how to correct most of the problems which may occur in the field. Review the Installation and
Calibration procedures in sections 3 and 4.
PROBLEM POSSIBLE CAUSE SOLUTION
RED LIGHT cannot be Transmitter module not connected Plug transmitter into flange.
adjusted to turn on. to flange.
No power to unit. Check for correct power.
Blown on-board fuse. Replace fuse.
Bad receiver card. Repair or replace card.
RED LED remains on at all Flange is shorted to ground. Unplug banana plug and position
times. it so that the bare end is not
touching anything. Turn calibration
Pot 20 turns CCW. LED should go
out. If it does, repair, replace or
clean flange. If LED does not go out,
replace electronics.
Check shielded cable for proper
connection.
Check shielded cable for shorts or
open circuits.
Unit triggers when material Improper mounting of flange. Contact factory or distributor.
touches sensing element, Improper calibration procedure. See Section 4.1 or 4.2
but will not reset when Excessive material build-up on
Perform “dirty pipe calibration”;
material recedes from sensing element. recalibrate with built up material
sensing element / unit and on sensing element. See section 4.1
gives false alarm. or 4.2
Unit will not detect material. Improper calibration. See calibration instructions,
Section 4.
Transmitter module not plugged Plug transmitter module into probe.
into probe. Be sure material is not touching
Unit was calibrated with material sensing element and recalibrate.
touching sensing element.
Unit will not stay in Poor grounding of transmitter Provide secure ground connection.
calibration housing to vessel.
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