TASC ROADSIDE SPRAYER SUPPLEMENT
999-1512
6
R1
V 3.10
G. Be sure the carrier pump is operating. Turn on the handgun. As soon as the flow switch
senses flow, the console will begin to adjust the flow control valve (after a short delay to allow
flow to stabilize) to achieve the desired flow in gallons per minute. At the same time the
chemical injection pumps will be activated at the speed necessary to apply the desired rates
of ounces per hundred gallons, according to the programmed target carrier rate. There is no
delay to the control of the injection pumps.
(NOTE: the carrier flow rate is the sum of the
carrier and the injected chemicals.)
H. Turn off the handgun. The chemical injection pumps will stop immediately. The flow control
valve will hold its position so that flow will be immediately available at the proper rate when the
handgun is again activated.
I. Set the Normal/Handgun switch to "Normal" and the flow control valve will automatically go
closed. Open the valve leading to the spray boom. The TASC console will then be ready for
the previously programmed broadcast spraying operations.
HANDGUN MODE, MANUAL VALVE OVERRIDE:
The flow control valve can be set to a manual override condition, if needed. Put the TASC
console in "SET-UP" mode, with the display selector on "Carrier, Application Rate". Use the
INC/DEC switch to set the application rate to 0.0 gallons/minute. When the mode selector is
switched back to "OPERATE", the display will show "
Flow
Contl
OFF Auto, Handgun", and
the flow control valve is driven fully open.
When in the Manual override condition, and with the display selector in "Carrier, Application
Rate", the flow control valve responds only to operation of the INC/DEC switch on the con-
sole. Flow can be controlled, either by the INC/DEC switch setting, or by feathering the
handgun trigger. When flow is established with the handgun valve, the console will display
flow as
GAL/MIN
. Any injection pumps selected "ON" will be controlled to the proper rate per
hundred gallons, based on the actual flow rates measured by the flow meter (except in the
"TEST SPEED" position where the programmed test carrier rate is used to control injection
pump speed).
