Rice Lake RoughDeck FXB, Installation Manual

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RoughDeck FXB
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3.0 Calibration and Adjustments
The following sections describe how to calibrate the RoughDeck FXB.
3.1 Calibration
Use the following steps to calibrate the RoughDeck FXB.
1. Zero balance the digital weight indicator. Refer to your manufactures’ operating manual for instructions.
2. Place test weights equal to 70 - 80% of the scale’s capacity on the weigh platform and adjust the weight indicator span
for the correct reading.
3. Remove the test weights and check zero.
4. Repeat steps 1-3 if the weight indicator does not return to zero.
3.2 Mechanical Adjustments
The corners of the scale base are preset. If the corners have extreme differences, check for bent flexures, broken welds, or
foreign objects in the corners.
1. Apply test weights equal to 25% of the scale’s capacity to each corner in sequence and observe the indicator. Record
these weights for reference.
2. If the corner shift reading is within tolerance, do not make any mechanical adjustments. If it is not within tolerance,
proceed to step 3.
3. Remove the deck plate and weigh platform frame.
4. Loosen all check link mounting bolts (
Figure 1-1 on page 2 ).
5. Loosen the top and bottom load flexure gripper plate bolts on the corner to be changed ( Figure 1-1 on page 2 ). Bolts
do not need to be completely removed.
6. Use Figure 1-1 on page 2 and the exercise below as a guide and perform one of the following:
Add shims to increase the fulcrum to the load distance which increases weight readings for the corner being adjusted.
Remove shims to decrease fulcrum to the load distance which decrease weight readings for the corner being adjusted.
For example, if:
Load error = 3 lbs
Load arm distance = 4"
Load on platform = 1000 lbs
Then your shim would be.012.
Shims are available in .010" and .030" thickness. Weight readings change in a linear way proportional to shim
thickness. For example, if adding a .010" shim increases weight reading 2 lbs on that corner, a .030" shim will increase
it 6 lbs.
7. Tighten all check link bolts.
8. Reinstall weigh platform and deck plate.
9. Recheck corners per step 1.
10. Recalibrate the scale as described in
Section 3.1 .
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