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844E Sprayer Control
CONDITION POSSIBLE CAUSE SOLUTION
6 Application Rate Units (GPA, G/1000
ft
2
I/Ha) continually fl ash on/off
A Speed sensor not calibrated correctly
Recalibrate the magnetic or radar speed
pulses in the Calibrate Speed section of
the System Setup Mode on page 18-19
of the 844 Installation Manual
B Incorrect nozzle spacing
Check the Nozzle Spacing section in the
System Setup Mode on page 15 of the
844 Installation Manual to ensure the
correct nozzle spacing has been entered.
This number should refl ect the distance
between nozzles in inches or (cm) on the
boom.
If banding, enter the band width as your
spacing.
If directed spraying enter the row spacing
divided by the number of nozzles per row.
C Incorrect capacity nozzles
The Nozzle Selection section in the
Application Setup Mode on page 24 of
the 844 Installation Manual does not
match closely enough to the tips on the
boom. Compare the value in this section
with the fl ow rate of the nozzles being
used at 40 psi (2 bar).
D Flow meter pulses incorrect
In the System Setup mode, move to the
Flow meter Pulses section on page 14
of the 844 Installation manual. Enter the
factory fl ow meter pulse rate located on
the tag accompanying the fl ow meter.
It might be necessary to recalibrate
the fl ow meter. Follow the fl ow meter
calibration procedure(s) on page 35 and
36 of this manual.
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