Calibration Procedure

To Verify the Sprayer's Output:

1. Put clean water in the tank. Never perform tests with chemical or fertilizer solution in the tank.

2. Turn on the master spray and adjust the pressure to the desired level. The engine speed should be the same as it would be under field conditions.

3. Hold a graduated pitcher under a nozzle for a certain length of time. Use a stopwatch or other watch that shows seconds to know how long the pitcher was collecting solution. Calculate the tip's flow rate as follows. (Tip Flow Rate [Lpm] equals Volume Collected [L] over Time to Collect [sec] times 60.)

4. Compare the tip's actual flow rate with the required flow rate.

5. Repeat Steps 3-4 with a couple nozzles in each section of the boom. It is necessary to check several nozzles to get an average output. Even brand new nozzles will most likely not yield the exact flow rate expected.

6. Replace nozzles if necessary. If any nozzle varies from the required flow rate by more than 10%, replace it. If two or more nozzles fail to pass, replace all the nozzles.

7. Adjust the pressure if necessary, then repeat the entire procedure. If the average flow rate of the tips which were checked exceeds the required flow rate, reduce the pressure slightly. If the average flow rate was too low, increase the pressure slightly.

AG,OUO1011,354 -19-28APR99-1/1