Rice Lake TradeRoute HL Series - Low Profile Installation and Setup for Models from 2011 and Older 128406 - Manual (Page 32)

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16.1 Balancing Procedure
When loading test weights on the scale (for balancing or calibration), it is important to
position the weights correctly. Imagine lines connecting the load cell positions (see
Figure 20). Keep the weights inside the area defined by the lines connecting the load cell
positions.
Note: Temporary racks may be required on the container to place the weights on
during testing. All modules have provisions for hanging test weights below the truck
frame.
Figure 20 - Loading Area
Before the scale can be calibrated, all load cells must be balanced and responding to
loading equally by adjusting the balance trimmers. The balance trimmers are located on
the main circuit board, inside the control panel (see Figure 19). They are initially set to
2-Ohm resistance. Use the following procedure to balance the load cells.
1. Use the following balancing weights to ensure proper balancing. Use a minimum of
¼ of the net capacity of the scale for balancing. I.e. for a 10,000-lb net capacity, use
at least 2500 lbs. for balancing.
2. Ensure the load cells are all loose when in the transport mode. The lockdown bolts
may have to be adjusted if the load cell is binding. Raise and lower the scale several
times to ensure the scale is hanging free.
3. Raise the scale. "Dead load" the test rack by following the Calibration Procedure
page 33. Load weights on the rack to the full capacity of the scale: then, unload all
the weights. This process “exercises” the load cells.
4. Press the zero key to obtain a good center of zero. Load one cell by placing the
balancing weights on that corner of the tank (inside the triangle noted above). Keep
the weights as close to the cell as possible directly above the cell being preferred.
Record the weight on the M2000. The weight reading should be close to the actual
weight applied at this point in the procedure; however it does not need to be exact.