Great Plains 3N-3020P Material Rate - Manual (Page 34)

196-248B 12/1/2009
Great Plains Mfg., Inc.
34
Microband
Checking Application Rate
The Microband charts are based on ideal condi-
tions. Factors including, but not limited to,
changing chemical formulas, field conditions and
tire pressure will affect application rate. Set the
microband sprockets according to the desired
rate. Check the application rate, then readjust the
rate as necessary.
Refer to Figure 4
1. To avoid running the seed meters, take off the
range chains on both ends of the drill.
2. Record the weight of an empty container
large enough to hold chemical metered from
one hopper for one acre.
3. Place several pounds of chemical over the
chemical rotors in an outside hopper. Raise
drill off ground.
4. Remove hose ends from the openers of the
chemical outlets of the hopper being mea-
sured.
Refer to Figure 5
5. Turn contact wheel clockwise a few turns to fill
rotors with chemical and until chemical drops
to ground from all hoses being tested.
6. Place the weighed container under the hoses
to gather chemical as it is metered.
7. Turn contact wheel clockwise 420 revolutions.
Check the hopper to make sure chemical ro-
tors have plenty of chemical covering them.
8. Weigh measured chemical. Subtract initial
weight of empty container. Divide by two for a
two rotor hopper or three for a three rotor hop-
per, then multiply by the number of insecticide
hoses for the pounds-per-acre application
rate.
9. If application rate is different than desired:
• Check to be sure all chemical rotors being
measured are covered with chemical.
• Adjust sprocket combination to match desired
results.
10. When finished reconnect chemical hoses to
openers.
Note: It is not recommended to use chemical
which uses a corn cob base because of the ten-
dency of plugging, or sand base which causes
premature rotor wear.
Equations for calibrating volumetric rate:
measured chemical empty container –
(number of rotors measured)
---------------------------------------------------------------------------------------------------- pounds per rotor =
pounds per rotor number of insecticide hoses = × pounds per acre
Figure 4
Range Drive Chain
20034
Range Chain
19114
Figure 5
Contact Wheel (Turn Clockwise)