Nozzle Flow Check

Nozzle flow check is a procedure to check your application rate at a desired speed. The following items can be determined:

• If the true application rate can meet the target application rate at a given speed.
• The true flow rate in L/min (gal/min) out of the spray boom.
• Whether the nozzles are worn.
• The pressure at the spray control valves given a desired speed and application rate.
• If there is a pressure drop between the spray boom section shutoff valves and nozzles.

  IMPORTANT: Always fill the solution tank with clean water to do a proper nozzle flow check.

1. Select the Menu button.

   
   BM011391-UN-05APR17

   Menu Button → Sprayer Application Button → Diagnostics Menu Softkey → Tests Tab

   
   N94041-UN-16NOV16

   
   BM002494-UN-11JAN17

   A - Diagnostics Menu Softkey

   B - Tests Tab

   C - Nozzle Flow Check Button

   D - Test Speed Input Box

   E - Target Application Rates

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2. Select the Sprayer Application button.

3. Select the Diagnostics Menu softkey (A).

4. Select the Tests tab (B).

5. Select the Nozzle Flow Check button (C).

6. Select the test speed input box (D).

7. Enter a speed value to be tested using the popup keypad.

8. Select the Accept button to accept the new value.

9. Turn the rate select switch to the target application rate to be tested (1, 2, or 3).

   NOTE: Current target application rate (E) is shown on the screen.

10. Place a calibration container under a nozzle.

11. Move the hand throttle lever to full throttle position.

12. Turn on the solution pump switch.

13. Turn on the spray system master switch.

14. Note the flow value displayed on the screen.

15. Wait 1 min and turn off the spray system master switch and solution pump switch.

16. Move the hand throttle lever to low idle position.

17. Measure the collected amount in the calibration container.

18. Multiply the measured volume by the number of nozzles in spray boom. The result should be equal to the value shown on screen. If not:

    • If the volume is higher than expected and pressure is lower than expected, nozzle tips could be worn.
    • If the pressure is higher than expected for the given output, nozzle tips could be partially plugged. Also a pressure drop can occur from the spray boom section shutoff valves to nozzle tips (normally only associated with high flow rates.)