In systems with cells in tension the upper and lower attachment must not be subject to twisting (rotation) and should be as far as possible aligned with the force to be measured. In systems with compression load cells the supporting base serves to give the reaction and rigidity to the applied force, while the upper plate compensates within certain limits (approximately 1 mm/meter) any non-verticality of the load and/or differences of parallelism between the two upper and lower plates.
For compression load cells the best way is to have a perfect verticality of the load in order to achieve a perfect parallelism and horizontality between the ground plane of the load cell and weighing surface structure
Mounting of Compression load cell:The supporting plane the load cell must be perfectly horizontal and coplanar. The structure must be sufficiently rigid to maintain the horizontality of assembling plane