Great Plains 3S-5000HDF Material Rate - Manual (Page 20)

18 00/00HD Min-Till Folding Drill Table of Contents Main Box Rates Great Plains Manufacturing, Inc.
195-325B Table of Contents Main Box Rates 2012-06-04
14. Consult the chart for the chart rate used for your first
calibration run with this material. If the just-measured
result was low, add the [adjusted] variance to the
previously used chart rate. If the measured result
was high, subtract the [adjusted] variance from the
previous chart rate.
15. Reset the fertilizer Range and Final Drive based on
the settings at the new chart rate.
16. You may want to repeat calibration procedure if your
results varied greatly from the desired target rate.
17. With calibration complete, Reinstall seed chain (if
removed) or reset Seed Rate Handle, reconnect
hoses, and lower gauge wheel to ground.
18. Set the center and right drill sections to match the
now-calibrated left section.
When drilling, check metering rate by noting acres
drilled, amount of fertilizer added to drill and level of
material in drill box. If you are applying more or less
fertilizer than desired, adjust metering rate slightly to
compensate for field conditions.
For example:
Our measured rate was high, so we
subtract the variance (19)
from the chart rate (78)
to obtain a new chart rate (59).
This is halfway between two chart rows (56 and 62)
Use either new drive setup:
Chart Rate 56
Chart Rate 62
Low Range Low Range
20T Driving 21T Driven
21T Driving 20T Driven