Report

1 of 40 Wisconsin Pesticide Applicator Training Program University of Wisconsin Extension Calibration 2014 Purpose of Calibration To deliver the correct rate of pesticide AND Apply it uniformly over the target area 2 of 40 Calibration 2014 Photo source: Syngenta Purpose of Calibration 3 of 40 Errors can lead to crop injury or loss of money Calibration 2014 Mini-Sprayers and Pattern Each nozzle is a “mini-sprayer” 1. Nozzle/boom height 4 of 40 Calibration 2014 2. Nozzle angle 3. Nozzle spacing Spray Rate 1.Nozzle flow rate 2.Speed of travel 5 of 40 Calibration 2014 Spray Rate – Nozzle Flow Rate 1.Nozzle flow rate 2.Speed of travel Pressure 6 of 40 Calibration 2014 OK for small adjustments Have to increase 4x to double output Spray Rate – Nozzle Flow Rate 1.Nozzle flow rate 2.Speed of travel For larger changes in output, consider changing the nozzle Gallons per minute - GPM 7 of 40 XR 80 03 Calibration 2014 80 degree angle 0.3 GPM at 40 psi Spray Rate – Speed of Travel 1.Nozzle flow rate 2.Speed of travel 8 of 40 Calibration 2014 • One to one • Speed up put less out • Easy way to make changes Spray Rate – Speed of Travel 1.Nozzle flow rate 2.Speed of travel 9 of 40 Calibration 2014 Speed (MPH) = distance in feet x 0.68 time in seconds The 4 steps to Calibration 1. Determine Required Flow Rate 10 of 40 Calibration 2014 The 4 steps to Calibration 1. Determine Required Flow Rate 2. Actual Flow Rate – Uniformity of Flow Rate 11 of 40 Calibration 2014 The 4 steps to Calibration 1. Determine Required Flow Rate 2. Actual Flow Rate – Uniformity of Flow Rate 3. Adjust to Flow Rate 12 of 40 Calibration 2014 The 4 steps to Calibration 1. Determine Required Flow Rate 2. Actual Flow Rate – Uniformity of Flow Rate 3. Adjust to Flow Rate 4. Determine how much pesticide and water to add to the tank Calibration 2014 1st Step – Determine Flow Rate MPH - Decide speed GPA - Gallons per Acre are given by label W - Nozzle spacing in inches 14 of 40 Calibration 2014 GPM = MPH x GPA x W 5940 1st Step – Determine Flow Rate Example: Wish to spray Whoop-IT. The label says to apply at 1 pt/A in 15 to 20 GPA. You wish to travel at 8 MPH GPM = MPH x GPA x W 5940 15 of 40 Calibration 2014 GPM = 8 MPH x 15 GPA x 15 5940 GPM = 0.3 This is your “required” flow rate 2nd Step – Actual Flow Rate Required flow rate is 0.3 GPM If all your nozzles are within 5% error of 12.8 fl oz in 20 seconds . . . 16 of 40 Calibration 2014 2nd Step – Actual Flow Rate Required flow rate is 0.3 GPM But if you are NOT within 5% of your required flow rate then . . . 17 of 40 You actually collect 8.5 fl oz in 20 sec 0.2 GPM Calibration 2014 3nd Step – Adjust Flow Rate 1. Speed GPM = 18 of 40 Calibration 2014 MPH x GPA x W 5940 3nd Step – Adjust Flow Rate 1. Speed MPH = 19 of 40 Calibration 2014 5940 x GPM W x GPA 3nd Step – Adjust Flow Rate 1. Speed MPH = 20 of 40 5.3 MPH Calibration 2014 5940 x 0.2 GPM 15 inches x 15 GPA 3nd Step – Adjust Flow rate 1. Speed 2. GPA GPM = 21 of 40 Calibration 2014 MPH x GPA x W 5940 3nd Step – Adjust Flow rate 1. Speed 2. GPA GPA = 22 of 40 5940 x 0.2 GPM 15 inches x 8 MPH 10 GPA This is below the label 15 to 20 GPA rate range Calibration 2014 4th Step – Amount to Add You must know: • The product rate • The required spray rate (GPA) • Tank capacity of or field size 23 of 40 Calibration 2014 4th Step – Amount to Add • 500-gallon tank • Sprayer is calibrated at 20 GPA • 32 fl oz Glyphosate 41 per acre 24 of 40 Calibration 2014 4th Step – Amount to Add • Step 1: how many acres will each tankful spray Acres per = 500-gal tank = 25 acres tank 20 GPA 25 of 40 Calibration 2014 4th Step – Amount to Add to a Full Tank • Step 2: how much Glyphosate 41 to add to each tank? Product per tank 26 of 40 Calibration 2014 = 25 acres x 32 fl oz/A = 800 fl oz 6 gal + 2 pt 4th Step – Amount to Add to a Partial Tank • 15-acre field • Sprayer is calibrated at 20 GPA • 12 fl oz/A of Headline fungicide 27 of 40 Calibration 2014 4th Step – Amount to Add Partial Tank • Step 1: how much water to add to the tank? 28 of 40 Calibration 2014 Water per = 15 acres x 20 GPA tank = 300 gals of mix 4th Step – Amount to Add to a Partial Tank • Step 1: how much Headline? Product per = 15 acres x 12 fl oz per acre tank 29 of 40 Calibration 2014 = 180 fl oz 1 gal + 3.2 pt 4th Step – Adjuvant Rates • Rate expressed as product per Acre Amount needed = product rate x acres = 2 pts crop oil x 16 acres = 32 pts (4 gals) • Rate expressed as a percentage Amount needed 30 of 40 Calibration 2014 = percentage x gals spray mix = 0.25% x 250 gals 100 = 0.625 gals adjuvant 5 pts 31 of 40 Calibration 2014 Granular Applications – Ounces per 1000 ft of row 30” row 2.5 ft 43560 ft2 = 17,424 ft long 2.5 ft for an acre 32 of 40 2.5’ 17,424 ft Calibration 2014 Granular Applications – Ounces per 1000 ft of row 1000 ft x 33 of 40 8.8 lbs = 0.5 lb 8 ozs per 17, 424 ft 1000 ft 2.5’ 17,424 ft Calibration 2014 Granular Applications – Ounces per 1000 ft of row 34 of 40 Calibration 2014 • Step 1: Mark a distance of 1,000 feet in the field • Step 2: Adjust each hopper unit to recommended settings • Step 3: Ready the hopper units for measuring output • Step 4: Drive the measured distance Granular Applications – Ounces per 1000 ft of row • Step 5: Weigh material from each unit 35 of 40 Calibration 2014 Unit 1 2 3 4 5 6 7 8 Weight (ounces) 8.2 8.4 7.6 7.9 8.1 8.2 8.6 6.0 Granular Applications – Ounces per 1000 ft of row • Step 6: Adjust units not within 5% of the recommended rate of 8 oz Five percent of 8 ounces is: 8 ounces x .05 36 of 40 Calibration 2014 Recalibrate units whose output is: less than 7.6 ounces or greater than 8.4 ounces Granular Applications – Ounces per 1000 ft of row • Step 5: Weigh material from each unit 37 of 40 Calibration 2014 Unit 1 2 3 4 5 6 7 8 Weight (ounces) 8.2 8.4 7.6 7.9 8.1 8.2 8.6 X 6.0 X Why calibrate, I have one of these? 38 of 40 Calibration 2014 Why calibrate I have one of these? It is always a good idea to check: 39 of 40 Calibration 2014 • Equipment wears out • Equipment can be off • Constants in the computer may be wrong • Slippage can lead to the wrong speed • And . . . Why not make sure it is working? What DID you do Father!?! 40 of 40 Calibration 2014 The gizmo said to turn RIGHT! Main Menu Calibration 2014