X20 Sprayer Reference Manual
Problem 20
Rate goes up when slowing down
Information
This is an indication of the Regulator Valve not controlling and could be caused by a number of things. There are 3 minimum hold settings in the Configuration Options. The first is Nozzle Minimum Flow.
This would be set at the minimum flow rate recommended by the nozzle manufacturer for the nozzles fitted to the Sprayer. The second hold point is for the Flow Meter, and is set at the minimum flow rate for the Flow Meter. For example, the Polmac Flow Meter has a mini- mum flow of 20 l/min. The third hold is a Low Pressure Hold based on vehicle speed. Depending on the speed, application rate and active booms, different holds would become effective at different times. On the operating screen, the system will show as being in Manual with the red Bar in the flow rate button lit up.
Problem 23
Incorrect volumes
Information
Flow Meter Calibration figure is wrong. This calibration figure can change over time due to wear and pump dynamics. The FCAL supplied by the manufacturer is usually only accurate under certain conditions. The build and design of the Sprayer could effect the calibration of the Flow Meter, such as an elbow at the Flow Meter connection. This creates turbulence within the Flow Meter, which will change with the rate of flow throughout the Flow Meter. A Flow Meter calibration should be performed periodically to ensure contin- ued accuracy of the system.
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