Module 13: Rate-controller functions and settings

13.6: Display outputs

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Published 24 January 2025 | Last updated 20 January 2025

It is possible to have a lot of information displayed on the main screen, such as speed, litres per hectare, nozzle pressure, tank volume and hectares sprayed. But litres per minute and nozzle pressure are the most important pieces of information to have visible on the main screen while spraying.

All the above pieces of information are useful to check during or after a job is complete, but total litres per minute and nozzle pressure will alert the spray operator to whether the sprayer is working properly while they are spraying. Litres per hectare (L/ha) and speed (km/h) are a guide only.

Tips

  • If the flow rate (L/min) remains constant, but the pressure begins to increase, check filters for blockages.

  • If flow rate remains constant and pressure drops dramatically, stop and check for leaks or blown hoses or fittings.

  • If pressure appears correct but flow rate is less than anticipated, check all sections are fully engaged and the section control/valves are responding correctly.

  • Use the controller subtotals and totals at the end of a tank, paddock and day to make sure that everything is working out correctly. If the difference between sprayed hectares and paddock hectares is too great, double-check that the controller settings are correct. If they are, a decision may need to be made to change the sprayer technology or spraying practices.

  • Make use of the field litres, total litres and hectares. Zero all the screen totals before starting a day’s spraying. When the spray operator finishes a paddock, they should check and record the field litres and hectares.