User manual WTS Ver.1.16
Seite 5 von 52
3 RECOMMENDATIONS FOR CORRECT INSTALLATION OF THE LOAD CELLS
SIZING OF LOAD CELLS CAPACITY
For safety reasons, in case of static weighing, it is advisable to use the load cells at a
maximum of 70-80% of its nominal capacity (assuming that the load is uniformly distributed
over the entire weighed structure); depending on the handling mode of the load to weigh,
consider to further reduce the % of load with respect to the nominal capacity (ex.: forklifts
handling, bridge cranes, etc.).
In case of weighing with dynamic loads, the installer has to estimate the thrust speed, the
acceleration, the frequency, etc.
INSTALLING LOAD CELLS
The load cells must be placed on rigid, stable in-line structures; it is important to use the
mounting modules for load cells to compensate for misalignment of the support surfaces.
PROTECTION OF THE CELL CABLE
Use water-proof sheaths 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
Connect several cells in parallel by using - if necessary - a watertight junction box with
terminal box. The cell connection extension cables must be shielded, led individually into
their piping or conduit and laid as far as possible from the power cables (in case of 4-wire
connections, use cables with 4x1 mm
2
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.
WINDY CONDITIONS - KNOCKS – VIBRATIONS
The use of weigh modules is strongly recommended for all load cells to compensate for
misalignment of the support surfaces. The system designer must ensure that the plant is
protected against lateral shifting and tipping relating to: shocks and vibration; windy
conditions; seismic conditions in the installation setting; stability of the support structure.
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