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The type of installation, the structure of the tank supports, and the strength of the mounting
surface govern the method of locating, attaching and installing the load cell assembly.
Carefully consider three areas that commonly cause accuracy problems:
• Are the supporting legs adequately braced so they will not spread when the system is
fully loaded?
• Does the supporting structure have the necessary strength to prevent flexing when the
system is fully loaded?
• Is there attached equipment such as skirting, venting, or piping that is likely to cause
binding or lack of flexibility?
1. Determine where to position the load cell assembly, as well as in which direction it should
be orientated.
2. Make necessary preparations for the mounting surfaces.
3. Lift and block the vessel to the same height as the load cell assembly.
4. Lift one corner or side of the vessel enough to slide the load cell assembly into place.
5. If the load cell assembly is being fitted under the leg of the vessel, verify that the leg's
centerline passes through the center of the top plate (through the center of the load cell's
load hole).
6. Attach the top plate by bolting. Do not fully tighten because shimming may be necessary
to level.
7. Repeat steps 4, 5, and 6 for the remaining load cell assemblies. The vessel should now
be supported on the load cell assemblies alone.
8. If necessary, move the vessel to its final position. Verify that there is no initial
misalignment between the base plate and top plate by lifting the vessel slightly at each
support point in turn. This will also indicate if the load is evenly distributed on all load cell
assemblies. If the load is not evenly distributed, adjust the four leveling screws up or down
as necessary to evenly distribute the load on the load cell assemblies.
9. Verify that the base plate is no more than ±0.5 degrees out of level. If necessary, adjust
the four leveling screws up or down to level the base plate, then attach the base plate to
the foundation using anchor bolts for concrete, or by bolting or welding to a steel
structure.
10. Check that the top plates are no more than ±0.5 degrees out of level. Install shims
between the leg of the vessel and the top plate if necessary and fully tighten the bolts.
11. The load distribution can be more accurately checked by connecting each load cell to the
junction box and indicator and measuring the output with a voltmeter. To verify wiring,
check the load cell and junction box wiring section of this manual. The variation in the load
among the cells should be no more than 20%. Repeat steps 8, 9, and 10 if necessary.
INSTALLATION
3500-0418-0M Rev A • DB-SP Load Cell Kits
7
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