999-1512
TASC ROADSIDE SPRAYER SUPPLEMENT
5
R1
V 3.10
HANDGUN MODE, SPECIAL CONSIDERATIONS
:
A. Pump Calibrations: The speed of the injection pumps during calibration is determined by
the programmed test speed (gallons per minute) and the programmed chemical application
rate (ounces per 100 gallons or ratio: gal/gal). Set these numbers to your typical operating
conditions before doing the pump calibrations.
B. The injection pumps will operate at the speed necessary to apply the correct amount of
chemical according to the
programmed
carrier application rate, regardless of small variations
in the actual carrier flow rate. (Large varaitions in the actual flow rate lasting more than 5
seconds will cause an error shutdown of the sprayer). Thus, chemicals will always be applied
correctly, even if there is variation in the carrier output. (If the carrier rate is set to 0.0, see the
Manual Override of Flow Control Valve Section, page 4.)
C. Booms are not used in the handgun mode. If the TASC senses a boom "ON" condition it
will indicate an "Err" and will stop the injection pumps and close the flow control valve.
D. The initial response of the flow control valve to the selection of the handgun mode is to
open fully. Once application has started, the response of the flow control valve to the flow
switch "OFF" condition is to "HOLd" the valve in the partially open condition. The CLOSE
valve response is not selectable while operating in the handgun mode.
E. The values programmed into the TASC console while in either the Handgun or Normal
mode will remain in console memory, even when the opposite mode is selected.
F. Selecting TEST SPEED on the TASC console, while in the "OPERATE" mode, will cause
the flow control valve to adjust flow to the test rate selected and the injection pumps to control
to the programmed test rate.
HANDGUN MODE, TYPICAL OPERATION:
A. Set the Normal/Handgun switch to "Handgun", the Boom switch to "Auto", and the Ground
Speed Override Switch to "OFF".
B. Select "SET-UP" for the TASC console mode selector. Program the TASC console as
necessary (See SET-UP Mode, page 2).
C. Zero the accumulated rates and set the desired carrier flow rate as necessary.
D. Select "OPERATE" with the TASC console mode selector switch. The initial response of
the flow control valve is to drive fully open.
E. Turn "ON" the desired chemical injection pumps.
F. Close the valve leading to the spray boom.
