Rice Lake BCi Belt Scale - Installation and Operation Manual Version 2.03 - Manual (Page 17)

Installation and Operation Manual - Introduction and Overview 11
Figure 1-10. Convex Curved Conveyor
1.4.6 Concave Curves
Conveyors that have concave curves should be avoided or the scale should be located in a section of the conveyor
that is not affected by the curve. If there is a curve, the belt must remain in contact with the idler rollers at all
times for at least 20 feet (6m).
Figure 1-11. Concave Curved Conveyor
1.4.7 Trippers
Tripper belts, mechanical sweep samplers, training idlers, feed points, skirt boards and other device that also
affect belt tension should be located away from the scale carriage.
If the scale must be installed on a conveyor with a tripper, then the same rules apply as for an installation in a
concave conveyor.
Table 1-3 offers basic guidelines for minimum distances and applies to both horizontal and incline conveyors.
Table 1-3. Distance Points from Conveyor to Scale Carriage
Type of Conveyor Distance from Scale Carriage
End of skirt boards or feed point 15’ or 4 idler spaces whichever is greater
Training idler or sweep sampler
30’ or 8 idler spaces, whichever is greater
Tripper or concave curve 40’ from the first idler affected by the curve
Convex curve or head pulley 20’ or 5 idler spaces
1.4.8 Speed Sensor or Magnetic Shaft Encoder Mounting Location - (Optional items)
The optional speed sensor location is not as critical as scale carriage location, however improper installation of
the speed sensor will significantly affect the performance of the scale system. The speed sensor must give an
accurate representation of the speed of the material and travel of the belt.