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JunctionBox
Rev B
05/21/18
3 Trimming Procedure
Trimming is a process of equalizing the output from multiple individual load cells. If
needed, load cell output can be individually trimmed with potentiometers.
Whenever a substantial amount of trim (more than 5% of normal output), seems
necessary to equalize output check for other possible problems. The best trim is
always the least amount of trim. When all errors except the cell mismatch and cable
extensions or reductions have been corrected, continue with the trimming.
3.1 Excitation Board Trimming Procedure
Use the following steps to properly trim the JB104SS junction box.
1. Determine the number of load cells needed.
2.
Make sure jumpers have been removed to enable trimming of the desired cells
corresponding to each load cell in use.
See Figure 3 for the location of jumpers
JP1, JP2, JP3 and JP4. Note that jumpers
must
be removed to enable trimming
on the excitation board.
3. Set all potentiometers fully clockwise to give maximum signal output from each
cell (see location of potentiometers below).
Figure 7: Excitation Main Board
