Equalization and connection circuit up to 4 load cell in parallel.
The following figure represents the basic configuration, using four-wire (sense) load cells and z-sg as signal conditioning device (measurer). With 4-wire extension cables the load cell output should be connected to pairs od diagonally opposite wire.
Sometimes it is neessary to trim the output of each individual load cell to avoid corner load diferences, which are caused by:
- The parallel connection. Each load cell will be loaded with the resistance of the other load cells. As a result, the individual load cell output tolerances will be increased by the individual output resistance tolerance.
- Unequal load distribution.
All load cells should be placed on the same horizontal level. Check for mechanical unequal load conditions before trimming the load cells.