Posted 7/12/2019 05:40 (#7610069 - in reply to #7609772) Subject: RE: Raven 440 flowmeter
Southern Minnesota Between Freeborn & Wells
In order for the Raven to show a rate, it must have information about the flow, the speed and be programmed correctly. It must be informed as to which booms are ON, this is called boom sense.
Check the programmed values for the boom width, speed cal, meter cal, etc. They may have inadvertently gotten changes.
On the bottom row of buttons, notice there is a button for Vol/min and another for Area/hr. Using these buttons should allow you to determine if the problem is with speed/area or flow.
While spraying and moving, push the button for Area/hr and observe the reading. The Area/hr should show how much land would be covered if you sprayed for an hour. This number is dependent on the booms that are ON and the speed you are moving. If it is zero, the problem is with the speed sensor, its cabling, the speed cal, the boom cal or the internal circuitry called boom sense that informs the 440 as to which booms are ON.
Next while spraying and moving, push the button for Vol/min and observe the reading. This value should show the amount of spray passing through the flow meter. If it is zero, this indicates a problem with the flow meter itself, its cabling or the meter cal. The flow meter may have some debris lodged in it preventing it from turning. The cable may have gotten damaged etc.