Great Plains 1007NT Material Rate - Manual (Page 31)

07/08/2009 150-290B
Great Plains Mfg., Inc.
29
18. The Small Seeds rate handle scale is a percentage
of meter opening, and its effect is linear near scale
center. Calculate a new scale setting based on the
test.
19. Set the Seed Rate Handle to the new scale setting.
20. You may want to repeat calibration procedure at the
new setting if your results varied greatly from the
Seed Rate Chart, or if you must operate near the
ends of the Seed Rate handle scale (0-20 or 90-
100).
21. With calibration complete, reinstall fertilizer chain (if
removed), reconnect seed hoses and move crank
handle back to storage.
When drilling, check seeding rate by noting acres drilled,
amount of seed added to drill and seed level in drill box.
If you are seeding more or less than desired, adjust rate
slightly to compensate for field conditions.
Small Seeds Row Shut-Off
If alternate row spacing is required for small seeds,
optional plugs (see Operator Manual: Options) are avail-
able to block flow inside the seed box tray.
1. Clean-out seed. The seed box must be empty prior
to inserting plugs. See “Small Seeds Box Clean-
Out” in Operator Manual.
2. Before installing plugs, inspect the seed boxes for
existing factory-installed plugs. These are blocking
extra unused seed ports. You may want to identify
these plugs with an indelible marker.
3. Insert one plug at each row to shut off. Verify the
seed hose path before inserting the plug, as some
hoses do not make a strictly vertical drop to their row
units.
4. Review seed rate settings prior to planting. Perform
calibration calculations with the actual active row
count.
When removing plugs to restore rows to operation, be
sure to not disturb a factory-installed plug.
For example:
the target rate was 12 lbs/ac,
the initial scale 60,
and the measured rate 10.9.
NewScale is:
66 = 60 x 12
÷ 10.9
NewScale PreviousScale
TargetRate
MeasuredRate
-------------------------------------- × =
Figure 11
Small Seeds Tube Plug
27407