Calibration - Hardi EAGLE 3PT Boom Operator's Manual

5.6 Calibration

WARNING: ALWAYS CALIBRATE YOUR SPRAYER WITH CLEAN
WATER ONLY! IN ADDITION, WEAR PROTECTIVE
CLOTHING WHEN CALIBRATING YOUR SPRAYER!
Why must you calibrate a sprayer?
A nozzle selection chart will tell you what application rate you should
expect. Variations due to nozzle wear, errors in pressure adjustment, and
tractor speedometer can result in a possible error in application rate.
How do you calibrate a sprayer?
Calibration kits are available from HARDI, #818103 for US gallons &
#818104 for metric calibration.
Following are some tips to remember when using the calibration kit
method:
• When determining the length of time required to drive the recommended
distance, drive in actual field conditions with a half-full tank.
• Repeat the test several times, each time avoiding the tracks from the
previous test. Take the average of the times recorded.
• Calibration of the sprayer should be completed at the beginning of the
season and repeated after every 2 to 3 full days of spraying, and every
time you change volume 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 or Formula method.
Then follow the steps described on the following pages:
HARDI ® EAGLE 3PT BOOM OPERATORS MANUAL 29