Service manual

104
Adjusting the Off-center Load
If the weighing platform has only 1 load cell, the off-center load is not
adjusted in case of error. The load cell must be replaced.
The off-center load is adjusted only in weighing platforms that have 4 load
cells.
Mechanical asymmetries can result in off-center loading errors that exceed
permissible tolerance limits. Such errors must be compensated by soldering
resistors to the PCB in the junction box.
The 4 solder bridges for the resistors are short-circuited at the factory (see the
illustration on the left; note the 4 solder bridges and the sequence of the load
cells).
Note: Correct installation and precise adjustment of the load cells are essential for
accurate measured results, and determine to a great extent the reaction of the
equipment to off-center loads.
In the event of any off-center loading error, always check the installation and
adjustment of the load cell before taking any other steps.
To minimize the off-center loading error, use the load cell with the lowest
readout value as a reference. Then adjust the other load cells to this value by
adding resistors.
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