Great Plains NTA3007 Operator Manual - Manual (Page 95)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 91
2012-07-02 Table of Contents Index 166-371M
Refer to Figure 91 (which depicts an earlier version of the
meter without the gate handle extension and guards - do not
operate without guards installed)
7.
Since only one calibration bag is provided, remove
one of the final range gears
from the meter that is
NOT being tested, to disable it.
8. Open the calibration door of the meter being
calibrated (page 57). The calibration door is the
bottom door under the lower (flute) shaft.
Material Loss Risk:
Do not open clean-out door (the door under the
upper/agitator) shaft. Opening this door drains the hopper.
Once this door is open it is difficult to stop seed flow until the
hopper is empty, and it may be impossible to close with an
adequate air seal.
Refer to Figure 92
9.
Attach crank (page 69): Un-pin crank from storage
location, and place over hex shaft at cranking
location (jackshaft at left side of frame, ahead of
ladder, or either contact drive wheel).
10. Weigh bag: Obtain the calibration sample bag and
scale. Zero the scale and weigh the empty bag, or
(with the digital scale) set “tare” using the empty bag.
Note: The empty bag weighs 1.53 kg (3.36 pounds) as
shipped from the factory.
11. Wipe all material off the flanges around the meter
door.
Refer to Figure 93
12. Place container under open calibration door or below
exit end of collection chute. If using the calibration
bag, loop bag handles over the door handles and
hook the bag to the front of the meter.
13. On the seed monitor terminal,
set the monitor to Calibration mode .
enter [ 5 ] for the “# Meter Revs”, and
press the Start softkey .
This “# Meter Revs” parameter does not affect the
monitor calibration because the monitor counts
actual meter shaft revolutions and uses that count to
compute the Calibration Constant.
The “# Meter Revs” parameter is used for a progress
bar displayed during calibration.
For a manual gearbox, continue at step 14 on page 92.
For a servo (variable rate kit) gearbox, continue at
step 34 on page 95.
Figure 91
Calibration Door Open
26339
F
R
1
2
1
2
Figure 92
Wheel Cranking, Left Side
29417
Figure 93
Calibration Bag on ADC2350 Meter
26402