Multi Pro 5800 Page 8 − 7 GeoLink Spray System
GeoLink Spray System Operation
GeoLink operation information can be found in the
GeoLink Operator’s Manual, Installation Instructions,
Quick Start Guide and Interactive Manuals.
The optional GeoLink spray system utilizes Global Posi-
tioning Satellites (GPS) technology to determine exactly
where you are and where you’ve sprayed. The system
can automatically turn spray nozzles ON and OFF
based on your exact location and any area previously
sprayed areas. The system is designed to help prevent
gaps and overlaps in spray product application, there-
fore avoiding costly chemical waste. In addition, the Ge-
oLink system monitors vehicle speed and spray product
flow to adjust the spray product output (flow rate) in real
time.
Sprayer Positioning
GeoLink equipped machines use one of the following
positioning systems: Wide Area Augmentation System
(WAAS) or Real Time Kinematic (RTK). WAAS systems
use only a signal from Global Positioning Satellites
(GPS) and are accurate to approximately 3 meters.
WAAS generated coordinates tend to move over time,
therefore, machines using WAAS systems will need to
define the boundary (spray zone) prior to each spray ap-
plication. GPS position data is collected through the
AGI−4 GPS antenna attached to the vehicle ROPS.
Units with RTK system correction use both a GPS signal
and a cellular signal, improving system accuracy to ap-
proximately 0.01 meters (1 cm). RTK generated coordi-
nates remain stationary, therefore, boundaries (spray
zones) defined using RTK equipped machines need on-
ly be mapped once. GPS position data is collected
through the AGI−4 GPS antenna, while the RTK correc-
tion signal is collected through a short vertical cellular
antenna mounted alongside the GPS antenna. Both an-
tennas are attached to the vehicle ROPS. A modem and
IMU is installed in the GPS antenna housing on units
with RTK correction.
NOTE: The system compass must be calibrated to allow
the positioning feature of the system to function accu-
rately (see Compass Calibration in this chapter).
Automatic Section Control (ASC)
Allows the system to turn spray nozzles ON when enter-
ing new areas, and turn nozzles OFF when passing over
previously sprayed areas. When engaged, the ASC fea-
ture is used to prevent pass−to−pass overlapping cover-
age (boundary limit − Unlimited). The feature can also
be set too control the spray nozzles to operate only in a
previously defined boundary (boundary limit − Field Lim-
it).
Automatic Rate Control
The GeoLink system controls application rate by in-
creasing/decreasing the hydraulic flow to the spray
pump (increasing/decreasing pump speed and there-
fore output/pressure) based on input from:
Operator programming (application rate)
Ground speed
Product flow (flow meter reading greater than 2 GPM
(7.6 lpm))
Spray system pressure (flow meter reading less than
2 GPM (7.6 lpm))
NOTE: The system flow meter must be calibrated to al-
low the automatic rate feature of the system to function
accurately (see Flow Meter Calibration in this chapter).
Unlike other spray systems, the ground speed input of
the application rate feature is constantly checked via
GPS and does not require calibration.
Spraying Methods
The spray system can be easily set to operate using the
following combinations of features:
Spraying with Field Boundary: system controls noz-
zles with boundary (spray zone) control and pass−to−
pass (overlap) control, the system also controls the
application rate
Spraying with Unlimited Boundary: boundary (spray
zone) control is OFF, the system controls nozzles with
pass−to−pass (overlap) control only, the system also
controls the application rate
Spraying with Rate Control Only: operator controls
the boom sections while the system controls application
rate only
Spraying Manually: operator controls the boom sec-
tions and the application rate
GeoLink
Spray System
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