Hardi New NAVIGATOR 1100 Operator's Manual

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Hardi New NAVIGATOR 1100 Operator's Manual Manual pdf 28 page image

26 HARDI® New NAVIGATOR OPERATOR’S MANUALCalibrationCalibrationWARNING: ALWAYS CALIBRATE YOURSPRAYER WITH CLEAN WATER ONLY! INADDITION, WEAR PROTECTIVE CLOTHINGWHEN CALIBRATING YOUR SPRAYER!Why must you calibrate a sprayer?A nozzle selection chart will tell you what applicationrate you should expect. Variations due to nozzle wear,errors in pressure adjustment, and tractor speedom etercan result in a possible error in application rate.How do you calibrate a sprayer?Calibration kits are available from HARDI®, #818493 forUS gallons & #818492 for metric calibration.Following are some tips to remember when using thecalibration kit method:• When determining the length of time required todrive the recommended distance, drive in actual fieldconditions with a half-full tank.• Repeat the test several times, each time avoiding thetracks from the previous test. Take the average of thetimes recorded.• Calibration of the sprayer should be completed at thebeginning of the season and repeated after every 2to 3 full days of spraying, and every time you changevolume rate or use new nozzles.• Before you calibrate, check the flow of each nozzle.If it puts out more than 10% of its original volume,replace it.Select your calibration method- Ounce method orFormula method.Then follow the steps described below:Ounce Method1. Determine how long it takes you to cover the teststrip. Use the following chart to determine the lengthof your test strip. Row width for broadcast applicationis equal to your nozzle spacing. For your drop nozzleor band application, use row spacing.Row width or nozzle spacing (in.) Distance (ft.)40 10238 10736 11334 12032 12730 13628 14626 15724 170Row width or nozzle spacing (in.) Distance (ft.)22 18520 20418 22716 25514 2912. Measure the amount of time it takes you to travel thetest strip when throttle is set at spraying speed.3. In a container (with oz. measurements), catch thespray from one nozzle for that amount of time.For drop or band nozzles, catch the spray from allnozzles for the row.4. Read the ounces in the container. That is the actualU.S. GPA applied (ounces = GPA).Formula Method1. Check your spraying speed. Measure a test strip of atleast 200 feet (300 feet is ideal). Travel the distanceat the speed you plan on spraying and record thetime it takes to travel the distance. Read from thechart or use the formula to find your exact travelspeed.Travel Time (in seconds)Speed in MPH 200 ft. 300 ft.3.0 45 683.5 39 584.0 34 514.5 30 455.0 27 416.0 23 347.0 19 297.5 18 278.0 17 269.0 15 23Formula:distance (ft.) x 0.68 = MPHseconds2. Calculate the required nozzle output. Use either thenozzle wheel (if nozzle spacing is 20 inches), or thisformula:Formula: Formula:GPM = GPA x MPH x W (in.) GPM = 10 x 7 x 20 = .24 GPM5940 5940Note:W= • Nozzle spacing (in inches) for broadcastapplication.• Row spacing (in inches) divided by number ofnozzles per row for drop nozzle application.• Sprayed band width or swath width (in inches) forband application divided by number of nozzlesper band.• Note that on the nozzle wheel, W = 20 inches.