Service - ABB LMS100 Series Operating Instructions Manual

6.0 Service

The LMS100 does not require any routine maintenance in normal
day to day operation.
CAUTION: If there is a need to take the switch out of service or
disconnect it for any reason, then make sure the circuit is de-
energized or that the area is known to be non-hazardous.
The LMS100's reed switch core assembly is field replace-
able. In the event of a failure, a replacement can be ordered
through an ABB sales representative by referencing part number
3KXL130100L0001.
Reed Switch Core Assembly Replacement Instructions
CAUTION!
De-energize all field wiring before servicing.
1) To remove the cover, first unlock the cover security bolt located
at the 5 o'clock position of the cover, by turning it clockwise
with an M2.5 hex key. When the bolt head no longer touches
the cover, grip the cover tightly and rotate it counterclockwise to
remove.
2) Remove the terminal plug and, if possible, associated field wir-
ing from the enclosure to ensure proper clearance.
3) Using a small precision Phillips screwdriver, loosen the two
screws shown in the figure below. When loose, grip the core as-
sembly with the thumb and index fingers. Pull outward to remove.
(see figure b)
OI/LMS100-EN Rev. A |
10 LMS100 Magnetic Level Gauge Switch
4) Place the included screws into the replacement core assem-
bly's mounting holes. Apply Loctite® 271 to each of the screws.
Align the core assembly screws with the threaded holes in the
enclosure as seen in the figure below. Tighten the screws with a
precision Phillips screwdriver.
NOTE: removing the switch from the chamber and placing
it on a flat surface as shown in the figure below will sim-
plify the replacement process. Be sure to note and mark
the exact mounting position of switch with respect to the
chamber before removal.