Operating - Calibration 6. Calibrate sprayer a. Using a calibrated jug, measure the output from at least four nozzles or at least one from each boom section, and compare with the calculated nozzle output. b. if the output differs by a small amount from the calculated output, alter the pressure accordingly and repeat the calibration until you have established the correct pressure for the required application rate. c. If the output differs by a large amount, re-check calibration and calculations and change the nozzle size and/or forward speed if necessary.                                         < 22 >