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Great Plains YP3025A Operator Manual User Manual

Page 92

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88

YP3025A

Table of Contents

Index

Great Plains Manufacturing, Inc.

401-705M

Table of Contents

Index

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.