Great Plains NTA2007 Operator Manual - Manual (Page 88)

84 NTA607 or NTA2007 Table of Contents Index Great Plains Manufacturing, Inc.
166-372M Table of Contents Index 2012-01-05
37. Wipe all the material off the flanges around the
meter doors, on the chute, and capture that material
in the calibration bag.
38. Accurately weigh the calibration bag plus material. If
you set a “tare” on the scale, the reading is the
sample net weight, so skip step 39.
39. Subtract the empty container weight to determine
the application rate for
1 ⁄
10
hectare (or
1 ⁄
10
acre).
40. Press the Stop softkey on the monitor
and enter the sample net weight (SampleWeight).
The monitor responds with a Calibration Constant.
Push the Save softkey to accept this
value.
Calibration Close-Out
41. Wipe the calibration door seals. Close the calibration
door(s). Raise and latch the chute. See page 50.
42. Re-install any removed final Range gears.
43. Remove and store the calibration crank.
Servo Seeding Example; Net Weight (step 39):
TotalWeight is 20.96 kg
for bag plus sample
BagWeight is 0.91 kg
SampleWeight is 20.96 - 0.91, which is:
20.96 kg
SampleWeight TotalWeight BagWeight – =