Great Plains 2525P Material Rate - Manual (Page 68)

118-960B 10/19/2010
Great Plains Mfg., Inc. 68
Microband
Checking Volumetric 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. Check the
application rate, then readjust the rate as
necessary.
1. Record the weight of an empty container
large enough to hold chemical metered from
one hopper for one acre.
2. Place several pounds of chemical over the
chemical rotors in an outside hopper. Raise
drill off ground.
3. Remove hose ends from the openers of the
chemical outlets of the hopper being mea-
sured.
4. Turn gauge wheel a few turns to fill rotors with
chemical and until chemical drops to ground
from all hoses being tested.
5. Place the weighed container under the hoses
to gather chemical as it is metered.
6. Turn drive gauge wheel 365 revolutions for a
15’ drill and 267 revolutions for a 20’ drill.
Check the hopper to make sure chemical ro-
tors have plenty of chemical covering them.
7. 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.
8. If application rate is different than desired:
• Check to be sure all chemical rotors being
tested are covered with chemical.
• Adjust sprocket combination to match desired
results.
9. 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 =
Use Diagram as reference for Microband
Sprocket Combinations
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