2019-03-19
411-198M
YP4025A-48TR20
Troubleshooting
100
Overall High
Population
(cont.)
Incorrect speed sensor constant
Perform speed calibration per DICKEY-john
®
monitor manual. See
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 implement name 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 168).
For GPS, check implement name 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 incorrect [active]
row count or spacing
When troubleshooting population issues, always first rule out seed
monitor setup. Review product 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 product 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.
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 intrusion. Use
the population adjustment factor in the Dickey John monitor system
to compensate for missed seeds. For example, 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
disk.
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.
