Great Plains TM700 Operator Manual - Manual (Page 30)

Tractor Mount Sprayer
500-052M 5/13/2003
28
Adjustments
Sprayer Pre-Calibrations
1. Wear the proper protective clothing as indicated on
page 5 in "Personal Safety Equipment".
2. From the crop protectant label and field conditions,
select a spray application rate and an operating
speed.
3. Be familiar with the type of crop protectant you are
using. READ THE LABEL.
4. Have all equipment ready BEFORE starting your
sprayer calibrations.
5. Make sure all spray parts are free from foreign ma-
terial and are functioning properly. Carefully inspect
nozzles and internal parts for wear, defects, proper
size and type.
6. Fill spray tank with water at least one quarter full,
and preferably half full.
7. Use only water to calibrate the sprayer.
8. With the sprayer stationary, operate the pump at the
desired spraying pressure. Check for leaks and im-
proper spray patterns from the nozzles.
9. Read the following pages to determine which meth-
od of calibration you will use and have a clear under-
standing of how the procedure works.
10. Use Calibration kit provided with booms to calibrate.
Calibration Procedures
This method gives you the distance driven to cover
1/128 acre {because there are 128 ounces per gallon}.
The time required to drive that distance is measured
first, and the volume of spray in ounces caught in the
time you measured is your application rate in gallons per
acre. From the chart below, determine the distance to
drive in the field {three runs are suggested} to obtain
your average time in seconds. You will generally use 15,
20, or 30 inch nozzle spacing on standard booms.
1. Determine your nozzle size, spacing, and pressure
to achieve your desired rate from the application
guide.
2. Measure the nozzle spacing on your boom and de-
termine the distance to drive to calibrate your spray-
er.
3. Mark off the distance with two markers provided, tie
twine at distance needed for nozzle spacing {Table
#1} and time how many seconds it takes to drive this
distance at the speed you will be spraying at. Make
sure you are at spraying speed when you cross both
marks. Two or more runs are suggested with the
sprayer half full. Simulate your field conditions to
take into account wheel slippage.
Average
Nozzle
Spacing
{Inches}
Distance
{Feet}
Average
Nozzle
Spacing
{Inches}
Distance
{Feet}
6 681 22 186
8 510 24 170
10 408 30 136
12 340 36 113
14 292 38 107
15 272 40 102
16 255 42 97
18 227 48 85
20 204
Table 1: Distance for each nozzle to spray 1/128
acre {One ounce discharge per nozzle equals one
gallon per acre}