GREAT PLAINS 1205NT, Руководство оператора, Страница: 38 / 64

1205NT Table of Contents Index Adjustments 34
3/7/19 Table of Contents Index 150-131M
Fertilizer Meter Rate
Fertilizer application rates will vary with fertilizer type,
density and particle size. Relative humidity and field
conditions can also affect application rates. The chart on
page 35 is based on material with a density of 65 pounds
per cubic foot (1.04 kg/L) and average particle size.
Initially set rate according to the charts, then calibrate the
drill to your material as described below.
Note:
For drills built after October 1, 2005, calibrate
using gauge wheels or supplied calibration crank.
For drills built before October 1, 2005, calibrate
using gauge wheels or order calibration crank kit
available through your Great Plains Dealer.
1. To calibrate using gauge wheels, raise drill with
tractor hydraulics so drive wheels are off the ground.
To calibrate using supplied calibration crank, attach
crank to coupler on gauge wheel jackshaft with
retaining pin. Disengage lockout on the drive wheels.
2. Rotate drive wheels or calibration crank to see that
metering system is working properly and free from
foreign material.
3. From the chart on page 35, find the setting number
for your row spacing and desired application rate.
Rotate gate adjustment knob to the number obtained
from the chart.
The fertilizer rate chart is for granular fertilizer with a density
of 65 pounds per cubic foot (1.04 kg/L). If you are applying
fertilizer with a different density, use the density conversion
chart.
4. Check that gauge-wheel tires are the correct size
and properly inflated. Refer to “Tire Inflation Chart”,
page 54.
5. Record the weight of an empty container large
enough to hold fertilizer metered for one acre.
6. Place several pounds of fertilizer over three fertilizer
feed cups on outside end of drill box. Pull fertilizer
tubes off these three openers.
7. Turn gauge wheels or calibration crank a few turns to
fill feed cups with material. Continue to turn until
fertilizer drops to the ground from all three tubes.
Note: You can also rotate the gauge wheel jackshaft by
means of a wrench or socket. If rotating gauge
wheel jackshaft, disengage the lockout on the
drive wheel and use same number of rotations as
for rotating drive wheel.
8. Place a container under the three tubes to gather
metered fertilizer.
9. Turn gauge wheel or calibration crank for
approximately 346 rotations (one acre). Check that
the three feed cups have plenty of fertilizer coming
into them.
10. Weigh metered material. Subtract initial weight of the
empty container. Divide by three. Multiply by the
number of openers on your drill to determine total
pounds-per-acre metered. If this figure is different
than desired, reset adjustment knob accordingly.
Note: You may want to repeat the calibration procedure
if your results vary greatly from the chart.
11. When drilling, check the rate by noting acres drilled,
amount of fertilizer added to the drill and level of
material in drill box. If you are applying more or less
that desired, adjust the metering rate slightly to
compensate for field conditions.
Equations for calibrating seed rate:
measured seed - empty container
------------------------------------------------- = pounds per
seed cup
3 (number of seed cups measured)
and
pounds per seed cup x number of openers = pounds per
acre
1205NT Calibration Crank