Rice Lake JB4SS TuffSeal Signal Trim Junction Box - Manual (Page 9)

4.2 Signal Board Trimming Procedure (JB4SS and JB4SP)
Use the following steps to properly trim the JB4SS and JB4SP junction boxes.
1. Determine the number of load cells needed.
2. Make sure jumpers are in place to enable trimming of the cells cor re -
spond ing to each load cell. See Figure 6 for the location of jumpers JP1,
JP2, JP3, and JP4. Note that you need to remove jumpers for any unused
cells.
3. Set all potentiometers fully clockwise to give maximum signal output
from each cell (see below for location of potentiometers).
4. Zero the indicator and place calibrated test weights over each load cell
in turn. The amount of test weights to be used will depend on the scale
confi guration; for specifi c recommendations, refer to Handbook 44 Field
Manual, published by the Institute for Weights and Measures. For a four-
cell platform, it's recommended using 25% of scale capacity.
Figure 6: Signal Trim Main Board
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