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Commissioning
6.3 Adjustment and initial commissioning
6.3.2
Initial commissioning
1. Align the load cell site horizontally and level over the complete area.
2. Clean the load cell site and load cell base until both are absolutely clean.
3. Grease the contact surfaces of the force transfer elements with bearing grease.
4. Adjust the overload protection, if used, to ensure that it can still reliably sense transfer of the
required load. The overload protection must permit a rise in weight unhindered until the
setpoint weight is reached.
5. Ensure dirt and ice cannot build up on the overload protection.
6.3.3
Corner load adjustment
6.3.3.1
When is corner load adjustment necessary?
General
SIWAREX load cells, with the exception of the WL250 and WL260 series, are current-calibrated
as standard. Corner load adjustment is not necessary in the case of current-calibrated load cells.
Corner load adjustment is only necessary in the case of load cells that are not current-calibrated
or load cells that are not synchronized.
This may not apply to load cells that are available outside the standardized delivery spectrum.
For these load cell types, the relevant technical specifications apply.
Recommendation
Note
Carrying out a corner load adjustment
If you can apply the mass center of the product at different positions, it is possible that different
weights are displayed in each case. This reaction can occur in particular with the following types
of scale:
• Platform scales
• Hopper scales where the filling with solid matter forms cones
We recommend that you carry out a corner load adjustment in such cases.
6.3.3.2
General procedure for corner load adjustment
The load cells are passive sensors: You should therefore follow the instructions in the manual for
the weighing module primarily. When they are installed in hazardous areas, the instructions for
the Ex i interface or for the Ex barrier must also be followed.
When the corner load for a scale has to be checked, impermissibly large deviations in the weight
indication can occur in the case of load cells that are not current-calibrated.
38
Operating Instructions, 04/2021, A5E02199611B-12
SIWAREX WL200
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