3-3
98-05012
R3
ARC-6000
During normal spraying, the control console maintains
the application rate at 10.0 gallons per acre. However,
let’s suppose the operator is spraying an aqueous
fertilizer. A soil type change in the middle of the field
requires a 40% higher application rate in order to reach
desired fertility levels. As the sprayer crosses into the
new soil type, the operator selects “ % RATE” with the
Display Selector. The
display shows the
percent of the pro-
grammed application
rate currently being
applied, in this case
100%. Pushing the
INC/DEC switch up
twice increases the
application rate by 2 X
20% or 40%. The
display shows 140%.
The flow control valve
opens until the
flowmeter measures 14.0 gallons per acre. None of the
other control functions of the console are affected.
The new application rate is maintained until a further
movement of the INC/DEC switch commands addi-
tional change, or a different position is selected with
the Display Selector. When the Display Selector is
turned to any other position, the control console
resumes the 100% target rate established previously.
The "% RATE" setting remains at the last value so the
operator can switch back to the previous rate by just re-
selecting the "% RATE" position. There is an approxi-
mate two second delay in initial valve response after
the operator has switched to "% RATE" so the rates
don't change by mistake as the Display Selector is
turned through "% RATE" to another position.
Operation at a changed application rate is not a
normal condition. The control console controls at
the changed rate only as long as the Display Selector
is turned to "% RATE".
%Rate
DISPLAY SELECTOR
Speed
Field Area Impl.Width
Distance
Test
Speed
Prime
Total Applied
Application Rate
OFF SET- UP DEC.
ON OPERATE INC.
Scan
Total Area
Product Vol.
ARC-6000
Automatic
Rate Controller
MID-TECH
¨
MIDWEST TECHNOLOGIES, INC.
123456789
BOOMS
Flow
% RATE
Select % Rate
Select "INC." Twice
Fig. 3-2. Changing App.
Rate “ On The Go” .
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