Near Intersection of I-35 & I-90 Southern Mn. | The problem with some of the Hardi sprayers is the positive displacement pump. Since the flow from a positive displacement pump must go "somewhere". If a boom section is shut off, it's flow which would normally go to the ground is routed back to the tank. That's fine but that flow would have passed through the flow meter and would have been "counted".
This makes it difficult to install a flow meter that only measures what is getting to the ground. Raven and Ag Leader address this situation with a setup that Ag Leader refers to as Calculated Reflow. With this arrangement, the system notes which booms are actually ON. If all the boom sections are on, it uses the total flow value from the flow meter.
If some sections are ON and others OFF, it computes the Percentage of the boom sections that are actually ON. It uses this value to factor or reduce the flow reading from the flow meter in an attempt to correctly measure what is getting to the ground. This assumes the back pressure through the return path is equal to the back pressure for that boom section. If the back pressure returning to the tank from a valve that is not spraying is less than if it were spraying, the calculated reflow would be incorrect.
I don't know if the Deere Rate Controllers have that capability. |
Hardi CM1200 to Greenstar Rate Controller?
