TeeJet TASC-6600 - Manual (Page 30)

3-2
TASC-6000, 6300, 6600 98-05010
Rev. - 1
3.4. CHANGING THE APPLICATION RATE “ON THE GO”
TASC allows the operator to change the Application Rate of the main carrier, or the rates of individual injected chemi-
cals, “ON THE GO”, using the INC/DEC switch. The amount of change caused by each actuation of the INC/DEC
switch is predetermined in the SET-UP Mode, (see Section 2.4).
We will use an illustration to demonstrate the ability to change application rates "On The Go".
3.4.1. CHANGING APPLICATION RATE OF THE MAIN CARRIER
The operator has chosen a desired application rate for the main carrier and entered this value into the TASC Control
Console using the procedure outlined in Section 2.3.1 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 TASC Control Console has been set up to apply 10.0 gallons per acre of carrier with
a % rate change set at 20%.
During normal spraying, the TASC Control Console maintains the application rate of the carrier at 10.0 gallons per acre.
However, let’s suppose the operator is spraying an aqueous fertilizer as the carrier. A soil type change in the middle of
the field requires a 40% higher application of fertilizer (carrier) in order to reach desired fertility levels. As the sprayer
crosses into the new soil type, the operator selects CARRIER, APPL. RATE with the Display Selector. The display
shows the current application rate of the carrier, in this case 10.0 Gal./Ac. Cycling the INC/DEC switch up twice
increases the application rate by 2 X 20% or 40%. The flow control valve opens until the flow meter measures 14.0
gallons per acre.
None of the other TASC control functions are affected. Thus, a TASC-6300 or 6600 still controls the injected chemical
at the preset application rate, regardless of changes to the carrier application rate. The new carrier application rate is
maintained until a further movement of the INC/DEC switch calls for additional change, or a movement of the Display
Selector away from the CARRIER, APPL. RATE position cancels the rate change. When the rate change command has
been cancelled, TASC resumes controlling the carrier application rate according to the target rate established by the
procedure in Section 2.3.1 of the manual.
NOTE: It is not recommended that the carrier rate be changed "on the go", while doing chemical injection, as
momentary dramatic changes in chemical application rate can result.
Operation at a changed carrier application rate is not a normal condition. TASC continuously alerts the operator that an
abnormal rate function is selected. The alert is both visual (a flashing “% RATE” on the LCD display ) and audible (a
periodic “beeping” of the alarm).
3.4.2. CHANGING APPLICATION RATE OF THE INJECTED CHEMICALS (TASC 6300/6600 ONLY)
The operator has chosen a desired standard and alternate application rate for each injected chemical and entered these
values into the TASC Control Console using the procedure outlined in Section 2.3.2 and 2.3.3 of this manual. Anticipat-
ing the need to simultaneously increase or decrease all injected chemical application rates, the operator has also estab-
lished a % rate change of the chemical injection pumps, using the procedure described in Section 2.4 of the manual.
3.4.2.1. CHANGING ALL INJECTION RATES SIMULTANEOUSLY
The application rates of all active injection pumps can be changed simultaneously by selecting the CHEMICALS, %
RATE function with the Display Selector and cycling the INC/DEC switch up or down to effect the change. The actual
application rates of all the active injection pumps are changed by the predetermined percent. Changing the injection rates
of the active injection pumps do not affect the application rate of the main carrier. Thus, a TASC-6300 or 6600 still
controls the carrier application rate at the preset rate, regardless of changes to the injection application rate. The new
injection rate is maintained until a further movement of the INC/DEC switch calls for additional change, or a movement
of the Display Selector away from the CHEMICALS, % RATE position cancels the rate change. When the rate change