Great Plains NTA2007 Operator Manual - Manual (Page 73)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 69
2012-01-05 Table of Contents Index 166-372M
Setting Material Rates
Rate setting details are covered in the Seed Rate Chart
Manual 167-085B, which also contains seed and
fertilizer rate charts. The topic is covered only in
summary form in the present manual.
The NTA607 or NTA2007 is a volumetric implement. For
a given metering setup, rates vary for materials with
different density and granularity. The charts provide a
starting point, but calibration is essential for accurate
application (even using both meters for the same
material at the same rate). Material rates are set
independently for each meter. The seed monitor reports,
and can optionally control, seed and dry fertilizer rates.
Liquid fertilizer rates are set at the pump. The monitor
console does not report or control liquid rates.
Check Contact Tires
Reliable material rates are only achieved if the ground
drive system is working properly. The transport tires and
contact drive tire must be the correct size, and must be
inflated to factory specifications. Check tire pressures,
particularly the contact tire pressure, whenever loading
seed or fertilizer. See page 152. Always replace worn
tires with the correct size.
Check Flute Shaft Type
For some unusual very high rate applications and some
small seeds, Great Plains offers alternate meter flute
shafts (page 145) that change rates to 150%, 200% or
~25% vs. the factory standard shaft.
Refer to Figure 57 (which depicts a single flute “star” with its
halves, a single star mated, two stars staggered, and a filler)
Know your “stars” setup. If your drill is unchanged from
factory standard, you have standard meter flute shafts
with 2 “stars” (4 halves) per outlet. The number and type
of “stars” determines the rate chart to use.
Refer to Figure 58 (depicting an inspection from below meter)
If the configuration is not known, inspect the flute shaft
from the hopper lid (if hopper empty), or from below the
meter, with the calibration door fully open. It is not
necessary to remove the shaft. Inspect the flutes
(
or ), and filler rings at active outlets.
On a standard “2 star” shaft, each seed drop outlet
contains two standard flute sets (4 halves
), each pair
staggered slightly from the next. Unused outlets are fully
blocked by filler rings
.
On a “3 star” shaft, each outlet contains 3 flute sets.
On a “4 star” shaft, each outlet contains 4 flute sets,
with no fillers between adjacent drops.
On a small seed shaft, each outlet contains one set of
shallow flutes
.
See also “Changing Meter Flutes” on page 168.
Figure 57
Standard / Small Stars and Filler
32400
1
3
2
Figure 58
Checking Flute Shafts
26426
4 1 3
1 2 3
1
4
1
1
2