Setup Options -Setup

V1.98 21/06/06

 

 

Low Pressure Hold

Note: ‘Low Pressure Hold’ should be set to zero for boom testing and setup. When this is completed, a ‘Low Pressure Hold’ can be set. A Pressure sensor would be required to set the ‘Low Pressure Hold’. The ‘Low Pressure Hold’ is mainly designed for ‘Inline’ spraying systems, follow the procedures below to setup.

When using a ‘Regulator Bypass’ system you should not be required to set a ‘Low Pressure Hold’ value, therefore set at ‘0’.

The ‘Low Pressure Hold’ is normally set at the speed just above the point where the nozzles are at the bottom end of their range e.g.100kPa. To determine the ‘Low Pressure Hold’ value the speed of the sprayer would have to be determined when the nozzles reach 100kPa.

The idea is to maintain a spray pattern, even if the application rate is above the desired rate. If a value is set in this option, and the sprayer speed falls below the set value, the spray system switches to ‘Manual’ mode and locks the regulator valve. When the sprayer is in this mode, it is most likely the sprayer will be over applying the chemical.

When the sprayer speed goes above the set value the spray switches to ‘AUTO’ mode and the regulator valve will start controlling.

Select the ‘Calculator Icon’ next to the ‘Low Pressure Hold’ and enter the value (in km/h). Select ‘Enter’ to save the value and close the window.

Enable Speed Smoothing

By default ‘Enable Speed Smoothing’ is enabled. Under normal spraying operations this should not be changed.

If a need arises for faster response to vehicle acceleration and deceleration, then deselect the box.

The Rate displayed on the screen may fluctuate more when this option is disabled.

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Topcom X20 manual Low Pressure Hold