Great Plains YP3025A Operator Manual User Manual
Page 92
88
YP3025A
Great Plains Manufacturing, Inc.
401-705M
02/16/2012
Metadata: End of “Population Too High“
Null4.aac:
Overall High
Population,
cont.
Speed sensor angle.
With planter lowered, check radar speed sensor angle per
DICKEY-john® recommendations.
Incorrect speed sensor constant
Perform speed calibration per DICKEY-john® monitor man-
ual.
Overlapping passes
Check marker extension (page 166).
For GPS, check planter size programmed.
Actual field size is different
Population may be correct, and calculations are not.
High
Population,
Single Row
Excess meter pressurization causing
doubles
Check shutter.
Worn seed-drop brush and/or strip
brushes allowing excess seed to
pass
Replace worn brushes.
Incorrect seed disk with higher cell
count.
Install correct disk.
Population Too High
Problem
Cause
Solution
Population Related
Problem
Cause
Solution
Overall
Population
Alarms
False alarms or actual rate errors
due to monitor setup with incor-
rect [active] row count or spacing
When troubleshooting population issues, always first rule out
seed monitor setup. Review planter configuration and monitor
setup.
Incorrect cell count
Replace seed disks with correct disks, or reset rate for current
disks (if within range).
Improper gap on speed sensor.
Check speed sensor on planter for
1
⁄
16
in to
1
⁄
8
in (1.6-3.2mm)
gap from wheel. Improper gap can cause erratic speed signal
causing monitor to falsely report improper planting rate.
Incorrect speed sensor constant
Perform speed calibration per DICKEY-john® monitor man-
ual.
Mismatch
Between
Reported and
Furrow
Population
Small seeds (example milo) are
not reliably sensed in the seed
tube
Run with rain covers in place to minimize ambient light intru-
sion. Use the population adjustment factor in the Dickey John
monitor system to compensate for missed seeds. For exam-
ple, change the DICKEY-john® Population Adjustment values
from 100% to 130% or 140% as needed. Remember to set
this back to 100% for large seeds.
Seed tube sensor is not counting
all seeds
Clean the seed tube of graphite and dust buildup with long
narrow seed tube brush. Replace sensors that malfunction.
Seeds / revolution value in the
DICKEY-john® setup does not
match the disk cell count.
Correct the value in a setup screen or install the correct cell
count disc.
Excessive
Seed
Cracking
Incorrect seed pocket size
Use correct disk for seed.
Damaged, old or dried-out seed
Use new seed.
Unclean seed
Use clean seed.