TeeJet ARC-6000 - Manual (Page 24)

98-05017
Rev.- 1
3-2
ARC 6000
CE & S
TANDARD
V
ERSION
3.3. CHANGING APPLICATION RATE
The operator has chosen a desired application rate and entered this value into the control console using the procedure
outlined in Section 2.2. of this manual. Anticipating the need to increase or decrease the application rate, the operator has
also established a % rate change using the procedure described in Section 2.4. of the manual. As an example, assume the
control console has been set up to apply 10.0 gallons per acre with a % rate change set at 20%
During normal spraying, the control console will maintain 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 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 will show the percentage of the programmed application rate, in this case
100%. Pushing the INC/DEC switch up twice will increase the application rate by 2 X 20% or 40%. The display will show
140. The flow control valve will open until the flowmeter records 14.0 gallons per acre. None of the other control functions
of the console will be affected.
The new application rate will be maintained until a further movement of the INC/DEC switch commands additional change,
or a different position is selected with the Display Selector. When the Display Selector is turned to any other normal
position, the control console will control application rate according to the target rate established by the procedure in Section
2.3. of the manual. The % RATE will remain at the last setting so that the operator can switch back to % RATE and change
to the previously set changed rate without holding the INC/DEC switch. There is an approximate 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.
Operation at a changed application rate is not a normal condition. The control console will only control at the
changed rate as long as the Display Selector is turned to % RATE.
3.4. PRIMING THE MAIN PUMP AND BOOM (LIQUID APPLICATION)
Use the following procedure to PRIME the main pump and boom lines prior to spraying (instructions unique to Pressure
Based operation are so noted).
A. Set the console switches to the following positions:
Power ON
Mode Selector OPERATE
Display Selector PRIME
B. A series of five dashes (- - - - - ) will appear on the display. If in Pressure Based mode the display will read "PSi" and
the current operating pressure.
C. Hold the INC/DEC switch up for about three seconds. The main control valve will open and remain in this position.
While operating in this mode, there will be no accumulation of area, distance or carrier.
D. The main pump can be run, with the booms or handgun open, to prime the sprayer. ARC will not try to shut down the
sprayer because it doesn't see any flow. The control valve will remain open.
E. Select any normal position of the Display Selector switch and the ARC system is ready to begin normal spraying. If in
Pressure Based mode, hold the DECREASE switch down for three to five seconds. The display should read "CLOSE"
and the valve will return to the position it was in before it was driven open. The console will resume reading "PSi".