calb list - Sprayer Calibration 1. Formula for Nozzle...

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Unformatted text preview: Sprayer Calibration 1. Formula for Nozzle Tip Selection and Calibration GPM (per nozzle) = GPA x MPH x W(in inches) 5940 Where: GPM = required output per nozzle in gallons per minute GPA = desired total carrier volume in gallons per acre MPH = desired ground speed in miles per hour W = space between nozzles in inches (or band width if making band applications) A. Nozzle tip size (orifice) selection: Select a nozzle that will give the required flow rate when the nozzle is operated within the recommended pressure range. B. Measuring ground speed: Time (seconds) required to travel 200 feet Speed in MPH Seconds MPH 45..................................3.0 39..................................3.5 34..................................4.0 30..................................4.5 27..................................5.0 23..................................6.0 19..................................7.0 18..................................7.5 17..................................8.0 15..................................9.0 14................................10.0 2. The 1/128th Acre Calibration for Row ­ and Boom ­Nozzle Sprayers (Baby bottle method) The 1/128th acre, baby bottle, method of calibration is based on spraying 1/128th acre. There are 128 ounces per gallon; therefore, ounces sprayed per 1/128th acre equal gallons sprayed per acre. 1. Determine nozzle spacing or swath width.* (Note: if you are making band applications and use nozzle spacing, you will figure the gallons of spray per planted acre.) 2. Refer to Table 1 below for length of calibration course and mark calibration course in the field. 3. Record time required to drive length of calibration course at gear, engine rpm, and implement settings to be used while spraying. 4. Park sprayer, maintain engine rpm used to drive course, and turn on sprayer. 5. Collect all spray from one nozzle for time equal to that required to drive the calibration course. 6. Measure the ounces caught. Ounces caught equal gallons per acre of spray applied. 7. Repeat Steps 5 and 6 for several other nozzles. * NOTE: If multiple nozzles are used per row, use the width of area treated by all nozzles as the swath width for step 1 and catch the flow from all nozzles directed to the row in step 5. TABLE 1. DISTANCE FOR EACH NOZZLE TO SPRAY 1/128 ACRE. Effective Swath Width (in) 6 8 10 12 14 16 18 20 22 24 30 36 38 40 Droplet Size Calibration: A New Approach to Effective Spraying http://www.ksre.ksu.edu/library/ageng2/mf2869.pdf Nozzle Types for Boom Sprayer Applications of Crop Protection Products http://www.ksre.ksu.edu/library/ageng2/mf2541.pdf Teejet Broadcast Spray Nozzles http://www.teejet.com/english/home/products/spray ­products/broadcast ­spray ­nozzles.aspx Technical Information http://www.teejet.com/media/328881/173 ­191_cat50a ­us.pdf 681 510 408 340 292 255 227 204 186 170 136 113 107 102 Course Distance (feet) ...
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This note was uploaded on 04/03/2011 for the course BTNY 304 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.

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