Great Plains 2525P Material Rate - Manual (Page 42)

Great Plains Mfg., Inc.
40
118-231B 03/23/2010
Finger Meter Charts
The basic seed rate for finger meters is determined by:
• meter drive configuration, and
• the meter finger count (6 or 12).
Finger meters have two additional adjustments for opti-
mum results:
1. Meter brush (see page 42)
2. Twin row indexing (see page 58)(For all seed corn
types)
IMPORTANT !
Great Plains always recommends test stand calibra-
tion of the finger meter to the population and ground
speed desired.
IMPORTANT !
Recommended speed is 4 1 ⁄
2
to 5 miles per hour.
Excess speeds are known to deteriorate seed spacing
control and depth control.
Reading a Finger Meter Rate Chart
1. Consult the chart for your row spacing and meter
type.
2. Find the desired seed population or seed spacing.
3. Note the range of meter rpms suitable for that popu-
lation.
IMPORTANT !
The shaded rpms are the recommended rpms for
most consistent results. Use the recommended driving
speed if possible.
4. Each chart page shows the Range and Upper Drive
sprockets at the upper left.
5. The Transmission sprockets are in the table, found
to the left of the Population.
30" ROWS 2510-H
corn types)
6 Finger Meter
p
mbinations Seed Seed
Population Spacing Meter Meter Meter Met
er Driven (seeds/acre) (inches) (rpm) (rpm) (rpm) (rpm
28 8,794 23.8 52 48
27 9,119 22.9 54 50 46
Ground Speed
7 mph 6.5 mph 6 mph 5.5 mph 5 mph 4.5 m
Seed Seed
ulation Spacing Meter Meter Meter Meter Meter Me
ds/acre) (inches) (rpm) (rpm) (rpm) (rpm) (rpm) (rp
,794 23.8 52 48
,119 22.9 54 50 46 Not Recom
For Round Corn optimu
( Shaded & Non shade
Range Sprockets:
Driver =
60 For Flat Corn optimum
Driven = 20 (Shaded area)
Grou
Transmission 7 mph 6.5 mph 6
Combinations Seed Seed
Population Spacing Meter Meter
Driver Driven (seeds/acre) (inches) (rpm) (rpm)
17 28 8,794 23.8 52 48
17 27 9,119 22.9 54 50
17 26 9,470 22.1 56 52
19 28 9 828 21 3 58 54