Babbitt LS8000 Full-Featured Sensor - Manual (Page 13)

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 LS8000 consists of three main sub-assemblies. These are the enclosure with the antenna probe, 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 LED cannot be adjusted to
turn on. Transmitter module not connected
to probe.
No power to unit.
Blown on-board fuse
Bad receiver card. Plug transmitter into probe.
Check for correct power.
Replace fuse.
Repair or replace card.
RED LED remains on at all times Antenna probe is shorted to case
or ground.
Shielded cable not correctly
hooked up.
Shielded cable broken or shorted. Unplug banana plug and position
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 antenna
probe. 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
touches probe, but will not reset
when material recedes from probe
or unit and gives false alarm. Improper mount of probe.
Improper calibration procedure.
Excessive material build-up on
probe.
Probe is mounted in flow of
material. Contact factory or dist.
See section 4 C.
Perform “dirty probe calibration”:
Recalibrate with built up material
on probe. See section 4C.
Revise mounting or use time
delay. See section 4C.
Unit will not detect material. Improper calibration.
Transmitter module not plugged
into probe.
Unit was calibrated with material
touching probe. See calibration instructions,
section 4.
Plug transmitter module into
probe.
Be sure material is not touching
probe and recalibrate.
Unit will not stay in calibration. Poor grounding of transmitter
housing to vessel. Provide secure ground connection.
Relay operates properly, but no
signal at terminals. Burned or broken lands on
receiver printed circuit board.
Bad relay contacts. Turn off power. Remove module
from housing and inspect lands on
printed circuit for damage.
Replace if necessary.
Replace relay or return for repair.
PLEASE CONTACT THE FACTORY OR YOUR DISTRIBUTOR IF YOU HAVE ANY
QUESTIONS OR NEED ASSISTANCE.
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