The flowmeter's calibration should be checked at the beginning of each spray season. Follow the instructions in the controller
manual to check and fine tune the flowmeter's calibration. The GPS system should not need to be calibrated for speed and distance after the system has been initially installed.

Once the flowmeter and GPS have been fine tuned, no other calibration should be required. MTDC calibrated the ATV sprayer on a 1⁄8-acre (5,445- square feet) test grid using the method described in appendix A.

A quick application rate test was run using the Boominator boomless nozzle (table 3). The sprayer maintained a nearly constant rate of application in gallons per acre. At 2½ miles per hour the applied rate was 13.06 gallons per acre; at 4 miles per hour the applied rate was 13.25 gallons per acre.