Kistler-Morse KM L-Cell Bolt-On - Manual (Page 39)

Chapter 5. L-Cell Installation on Skirt-Supported Vessels
5-2
Note
If the vessel panels differ significantly from this industry standard or the
panel height is less than 6’ (1.8m), consult K-M for assistance in determin-
ing optimal mounting locations.
Example: The Application Data Form indicates a 12’ diameter bolted vessel.
From Figure 5-3, a 12’ bolted vessel has 8 panels around its circumference.
1. Locate an L-Cell set on panels 2, 4, 6, and 8 (skipping panel 1, which has a
door), for a total of 8 L-Cells (4 panels x 1 L-Cell set/panel x 2 L-Cells/set).
2. Locate junction boxes on panels 3 and 7. The junction boxes will be wired as
follows: panel 3 box to L-Cells (4) on panels 2 and 4, and panel 7 box to
L-Cells (4) on panels 6 and 8.
Welded, Skirt-Supported Vessels
See Figures 5-3 and 5-4. The placement of L-Cells and junction boxes for welded
vessels is similar to that for bolted. However, since there are no standardized
panels, the L-Cell placement is based on the nominal distance between L-Cells
shown in Figure 5-3.
Note
If the panel height is less than 6’ (1.8m), consult K-M for
assistance in determining optimal mounting locations.
Example 1: The Application Data Form indicates a 12’ diameter welded vessel.
1. From Figure 5-3, for a 12’ diameter vessel, the spacing between sensors is
approximately 9’-5”. Locate L-Cell sets at 9’-5” spacings around the vessel,
with the door centered between 2 L-Cell locations, for a total of 8 L-Cells
(4 locations x 1 L-Cell set/location x 2 L-Cells/set).
2. Locate junction boxes at 2 places, centered between the L-Cell locations. Two
junction boxes will each be wired to 4 adjacent L-Cells.
Example 2: The Application Data Form indicates a 14’ diameter welded vessel.
1. From Figure 5-3, for the next largest size (a 15’ diameter) vessel, there are 5 L-
Cell locations. Calculate the L-Cell spacing for a 14’ diameter vessel:
(p x diameter)/number of locations = spacing (p x 14’)/5 locations= 8.8’ = 8’-9”
spacing . Locate L-Cell sets at 8’-9” spacings around the vessel, with the door
centered between 2 L-Cell locations, for a total of 10 L-Cells (5 locations x
1 L-Cell set/location x 2 L-Cells/set). (Where p = # of panels)
2. Locate junction boxes at 3 places, centered between the L-Cell locations. Two
junction boxes will each be wired to 4 adjacent L-Cells and one junction box
will be wired to 2 adjacent L-Cells.