Babbitt LS8000/2 Multi-Point Sensor - Manual (Page 16)

5. MAINTENANCE AND TROUBLESHOOTING
No routine maintenance is required other than to keep the interior of the unit clean and free of dirt, moisture and
other contaminants.
The LS8000/2 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 power to unit.
Replace fuse.
Repair/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 module and position it so
that the bare end is not touching
anything. Turn calibration pot 25
turns CCW. LED should go out.
If so, repair, replace or clean
antenna probe.
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.
Contact factory or dist.
See section 4C.
Perform “dirty probe calibration”:
Recalibrate with built up material
on probe. 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 section 4.
Plug transmitter module into
probe.
Recalibrate without anything
touching probe.
Unit will not stay in calibration. Poor grounding of transmitter
housing to vessel. Provide secure ground connection.
Fluid must be grounded to
mounting nipple of probe.
Grounding rod may be necessary
for non-metallic or rubber lined
tanks.
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 as necessary.
Replace relay or return for repair.
PLEASE CONTACT THE FACTORY OR YOUR LOCAL DISTRIBUTOR IF YOU
HAVE ANY QUESTIONS OR NEED ASSISTANCE.
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