TeeJet TASC-6500 - Manual (Page 40)

6-2
98-0501
Rev- 1
CE & S
TANDARD
V
ERSION
TASC 6200/6500
B. Remove the fuse for the flow control valve at the cable disconnect. If the valve has failed in an open position, allowing
sufficient flow to pass to keep a good pattern at the nozzles, no further action is needed to adjust the valve. If the valve
has failed in a closed or nearly closed position, it will be necessary to remove the electric actuator assembly and manually
rotate the valve stem to an open position. BE CAREFUL. MARK THE VALVE POSITION TO START. TYPI-
CALLY FULL OPEN TO FULL CLOSE IS ONLY A 90
0 ROTATION. For machines that use Mid-Tech's EXR
hydraulic control valve to regulate the pump speed, loosen the locking collar at the base of the actuator, and rotate the
complete actuator until the desired boom pressure is achieved. Retighten the locking collar.
C. Turn ON the normal boom sections. Use a nozzle chart to determine the boom pressure that will give the desired
APPLICATION RATE at the target speed. Adjust the pump bypass valve (if one is provided) or manually turn the
control valve stem to generate the desired boom pressure. Turn all boom sections OFF.
D. Start the vehicle moving toward the swath to be covered. When the vehicle reaches the starting point of the desired
swath, turn on the appropriate boom switches and the sprayer will start to spray. At this point, the operator is enjoying
some monitoring functions of the TASC, but has no positive control of the flow control valve.
E. Monitor APPLICATION RATE. Actual APPLICATION RATE will be displayed. Adjust the ground speed to reach
the APPLICATION RATE desired.
F. The console cannot automatically adjust for changes in boom widths. If booms are shut off, pressure must be reset.
VOLUMES and AREAS will accumulate normally. SPEED will read correctly.
MIDWEST TECHNOLOGIES RECOMMENDS THIS PROCEDURE ONLY AS AN EMERGENCY, TEMPO-
RARY PROCEDURE. THE PROBLEM WITH THE FLOW CONTROL VALVE SHOULD BE RESOLVED AS
SOON AS PRACTICAL SO THAT FULL CONTROL OF THE SPRAYER CAN AGAIN BE ENJOYED.
6.3 FLOW METER FAILURE (LIQUID APPLICATOR)
Channels C, L (1, 2, 3 in Flow Mode only)
The procedure is very similar to operating without the flow control valve except , in this instance, the flow control valve is
cycled using a manual override procedure.
NOTE: If you are operating under GPS, first return the console to Local Control as described in the note in section 6.2.
A. Shut all boom sections OFF and stop the vehicle. Disconnect the flowmeter wiring harness at the sensor (3 pin
connector).
B. Set the application rate to 0.0 (see sect. 2.4) and return the Mode Selector to OPERATE. The Flow Control Valve will
now respond only to manually activated INC/DEC commands from the Control Console.
C. Turn ON the normal boom sections and allow spray. Use a nozzle chart to determine the boom pressure that will
give the desired APPLICATION RATE at the target speed. Adjust the boom pressure using the INC/DEC switch on the
Control Console. INC will open the Flow Control Valve and DEC will close the valve. Once the desired pressure is
attained, turn all boom sections OFF.
D. Start the vehicle moving toward the swath to be covered. When the vehicle reaches the starting point of the desired
swath, turn on the appropriate boom switches and the sprayer will start to spray. At this point, the operator is enjoying
some monitoring functions of the TASC 6500, but has no automatic control of the flow control valve.
E. Monitor SPEED. Adjust the ground speed to reach the target speed desired.
F. The console cannot automatically adjust for changes in boom widths. If booms are shut off, pressure must be reset
using the INC/DEC switch.
NOTE: The display selector must be turned to the APPLICATION RATE position in order for the INC/DEC switch to
control the valve. AREAS will accumulate normally and SPEED will read correctly.
MIDWEST TECHNOLOGIES RECOMMENDS THIS PROCEDURE ONLY AS AN EMERGENCY, TEMPO-
RARY PROCEDURE. THE PROBLEM WITH THE FLOW METER OR PRESSURE SENSOR SHOULD BE
RESOLVED AS SOON AS PRACTICAL SO THAT FULL CONTROL OF THE SPRAYER CAN AGAIN BE
ENJOYED.