Great Plains ADC2350BE Operator Manual - Manual (Page 68)

64 ADC2350/E and ADC2350B/BE Table of Contents Index Great Plains Manufacturing, Inc.
167-085M Table of Contents Index 2012-08-01
11. Turn the calibration crank counterclockwise for the
number of turns to simulate
1 ⁄
10 acre (or
1 ⁄
10 hectare).
Note: It is important to turn the calibration crank rapidly.
(About 2 to 2
1 ⁄
2 revolutions per second is the
proper speed to simulate 5 to 6 mph planting
speed.)
See chart below for the correct number of turns for
your implement.
Note: A longer calibration is always more accurate,
especially for low rates and small seeds.
1 ⁄
10 acre is
easy to calculate and is a minimum calibration run.
12. Wipe all the material off the flanges around the
meter doors and capture that material in the
calibration container.
The right column contains an example for the following
steps.
13. Accurately weigh the container plus material.
Subtract the empty container weight to determine
the application rate for
1 ⁄
10 acre (or
1 ⁄
10 hectare).
14. 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.
15. Multiply the sample size by 10 to determine
application rate per acre (hectare) at the current
variable rate gearbox setting.
If the calibrated rate matches the target rate, skip to
step 21. Otherwise…
Drill Model
Clutch Shaft (Crank) Revs for…
1/10 Acre 1/10 Hectare
CTA4000 30
1 ⁄
2
75
1 ⁄
2
CTA4000HD 30
1 ⁄
2 75
1 ⁄
2
NTA3010 41
1 ⁄
4 102
NTA3510 31
1 ⁄
4
77
3N-4010HDA 31 76
1 ⁄
2
Example: Wheat, High Rate, 2 Stars
Target Seed Rate: 67.6 pounds per acre
Initial Variable Rate Gearbox setting: 38
Example:
MeasuredWeight is 10.92 pounds
SampleWeight = 10.92 - 3.36,
which is: 7.56 pounds
SampleWeight MeasuredWeight ContainerWeight – =
Example:
CalibratedRate = 7.56
× 10,
which is: 75.6 lbs/ac
This is higher than our target rate of 67.6 lbs/ac.
CalibratedRate SampleWeight 10 Ч
=