Here are the recommendations for the correct installation of the load cells:
INSTALLING LOAD CELLS : The load cells must be placed on rigid and stable structures; it is important to use the mounting kits for load cells to compensate for misalignment of the support plates.
PROTECTION OF THE CABLE OF THE CELLS: Use water-proof sheathes and joints in order to protect the cables of the cells.
MECHANICAL RESTRAINTS (pipes, etc.) : When pipes are present, we recommend the use of hoses and flexible couplings with open mouthpieces with rubber protection; in case of hard pipes, place the pipe support or anchor bracket as far as possible from the weighed structure (at a distance at least 40 times the diameter of the pipe).
CONNECTING SEVERAL CELLS IN PARALLEL: Carry out the parallel connection of the cells by using a water-proof junction box with terminal box. The junction boxes are provided with up to 8 cable glands plus one cable gland for cable exit. The extension cables, connected to the load cells, must be shielded, led alone into the piping or trough and laid as far as possible from the power cables (in case of 4-wire connections: use cables with 4 x 1 sq.mm minimum cross-section).
WELDING : Avoid welding with the load cells already installed. If this cannot be avoided, place the welder ground clamp close to the required welding point to prevent sending current through the load cell body.
WIND - KNOCKS - VIBRATIONS : The use of mounting kits is strongly recommended to compensate for misalignment of the support plates and especially to achieve optimal accuracy and reliability. To ensure the stability of the structure the system designer must consider further contrivances according to the following conditions: Knocks and vibrations; Seismic conditions; Hardness of support structure; Wind effect.
EARTHING THE WEIGHING SYSTEM : By means of a copper wire with suitable cross-section, connect the cell upper support plate with the lower support plate, then connect all the lower plates to the earthing system. Electrostatic charges accumulated because of the product rubbing against the pipes and the weighed container walls are discharged to the ground without going through or damaging the load cells. Failure to implement a proper earthing system might not affect the operation of the weighing system; this, however, does not rule out the possibility that the cells and connected instrument may become damaged in the future. It is forbidden to ensure earthing system continuity by using metal parts contained in the weighed structure.