Babbitt LS7000 Full-Featured Sensor User Manual
Page 10
Every LS7000 has a diagram inside the screw cover to serve as a reminder to those who have calibrated the
unit before. This shows the calibration adjustments and indicators. This diagram is reproduced below.
SPECIAL CALIBRATION NOTES:
For some products, the LS7000 can be calibrated with product touching the probe. To do this, turn the
sensitivity adjust pot CW until the red LED just comes on and continue CW for 1/8 to ¼ of a turn. Always
check to see if the unit resets in the absence of product.
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 LS7000 consists of three main sub-assemblies. These are the enclosure with the antenna probe, 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. Review the Installation and Calibration procedures in sections 3
and 4.
PROBLEM POSSIBLE
CAUSE
SOLUTION
RED LED cannot be adjusted to
turn on.
Antenna lead not connected.
No power to unit.
Blown on-board fuse.
Bad sensing card.
Plug antenna lead into probe.
Check for correct power to unit.
Replace fuse.
Repair or replace card.
RED LED remains on at all times
Antenna probe is shorted to case
or ground.
Bad sensing card.
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.
Repair or replace card.
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 4C.
Perform “dirty probe calibration”:
Recalibrate with built up material
on probe. See section 4C.
Revise mounting or use time
delay. See sec. 4A