and Farm Supply, Inc.
Calibrating your sprayer is important for making sure you get the right amount of spray out on your crop. These instructions will tell you how to calibrate your sprayer to find out how many Gallons Per Acre (gpa) you will be spraying. The method that we are using is called the 128th of an acre method, it takes the amount of water put out of 1 tip over a certain distance at the same speed, RPM's, and pressure that will be used in the field.
1) The first thing you need to do is to measure the distance between the tips on the sprayer. It does not matter which 2 tips on the sprayer that you measure.
2) Find the distance on this chart and the number of feet that correspond with it is the number you need in step 3.
Inches Between Tips
Feet to Travel
3) Next you need to mark off a test strip. The number of feet you got in step 2 is the length The easiest way we have found to do it is with some orange marking paint. Mark your starting line then get a measuring wheel or long tape measure and spray another mark at the ending point.
4) Now you will take a bottle of some kind(a Gatorade bottle with the big lid works great) and tape it around one of your tips, once the bottle is secure you need to set your tractor exactly as you will run it in the field, same RPM's, pressure, gear on the tractor and speed. The best way to do this is get everything set and start your run then turn the sprayer on as you pass your starting line.
When you reach the end of your strip and shut your sprayer off you need to measure the the number of ounces that you caught in your bottle. Whatever the number is will be how many gallons of spray you will spray per acre. As with anything else if you have any questions please call us and we will help walk you thru it.
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