YP3025A
Troubleshooting
91
2019-06-12
401-705M
Population Too High
Problem
Cause
Solution
Overall High
Population
Incorrect seed rate
Check seed rate charts
Two seeds per pocket on the disk (doubles),
due to excess meter pressurization
Methodically decrease the controlled air to the meter. See
Two seeds per pocket on the disk (doubles),
due to pockets too large for the seed
Select a disk with smaller pockets.
Air meter pressure too high due to pressure
sensor not zeroed properly.
Re-zero the air pressure with the fan off. Make sure the
displayed pressure reads 0.00.
Air pressure too high, false information driving
the DICKEY-john® software.
Compare the air pressure reported on the monitor console to
the mechanical gage. If they do not match:
•
Inspect the
1
/
4
inch sample lines from the row units
up to the sensor chamber for leaks.
•
Make sure all non-planting rows have blank disks.
•
Re-zero the air pressure with the fan off.
False alarms or actual seed rate errors due to
monitor setup with incorrect row count,
spacing or active rows
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).
Incorrect speed sensor constant
Perform speed calibration per DICKEY-john® monitor
manual. See page 175.
Doubles due to incorrect disk for crop or seed
size
Use recommended disk for crop and seed size.
Sticky seeds: excess seed treatment
Increase seed lubricant.
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
manual.
Overlapping passes
Check marker extension (page 174).
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 Related
Problem
Cause
Solution
Overall
Population
Alarms
False alarms or actual rate errors due to
monitor setup with incorrect [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
inch to
1
/
8
inch
(1.6-3.2 mm) 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 manual.
