micro-trak MT-3405 M, Reference Manual

Page: 28 / 56

MIN FLOw/PRESSURE:
The pur pose of this calibration
parameter is to set the minimum
recommended flow rate for the spray boom
and the minimum recommended pressure
for the nozzles. Once set, the system will
prevent the actual flow rate
and pressure from going
below the recommended
minimum rating.
CALCULATINg MINIMUM FLOw vALUE
Determine from your tip chart what your nozzle’s minimum
gallon per rating is at their minimum recommended
pressure. Do not use the gallon per minute rating of your
actual application rate. For example, if the minimum flow
rate per nozzle is .22 GPM at their minimum pressure and
your spray boom has 20 nozzles (all sections), the minimum
flow calibration value is 4.4 (.22 x 20 = 4.4). The system will
not apply at a rate lower than this value when spraying in
AUTO.
ENTERINg MINIMUM FLOw ANd PRESSURE vALUES
The “CAL” button is used to toggle between minimum flow
and minimum pressure. While in minimum flow, the console
indicator will read “CAL”. While in minimum pressure, the
console indicator will NOT read “CAL”.
FLOw RATE
MIN
FLOw/
PRESSURE
28
Calibration
(cont)
Entering Calibration Values
(cont)
NOTE: Entering these values will determine system control
type (flow/pressure/hybrid). See Control chart at right.
To enter minimum flow, use the “+” or “-” button to adjust the
displayed value to the calculated minimum flow rate value
for the nozzles used (rotary dial in “FLOW RATE” position).
To enter minimum pressure, use the “+” or “-” button to
adjust the displayed value to the recommended minimum
pressure for the nozzles used.
APPLICATION NOTE: In certain situations, your ground
speed may be slow enough to result in over-application. In
other words, based on ground speed, the actual flow rate
has dropped to the calibrated minimum flow rate.
If you are using a pressure sensor, you must null the pressure
offset. For details, see “Pressure Offset”, page 38.
CONTROL TyPE
The following chart shows which values must be entered for
each of the three control types offered in the MT-3405M.
CONTROL TyPE FLOw CAL MIN FLOw MIN PRES
Flow Y N/A N
Pressure N Y Y
Hybrid Y Y Y
y = Must be entered; N = Must not be entered
AdjUST RATE:
Enter the value for the desired amount of
change in gallons per acre to be used for making on-the-go
rate adjustments when op er at ing in AUTO.
For example, if a value “1.0” is entered, you
will be able to increase and decrease your
application rate in one- increments
during operation in AUTO.
To disable this feature,
simply enter “.0” for a val ue.
AdjUST
RATE
PRESSURE
TARgET RATE:
Enter the value for the desired
target application rate in gallons per acre+.
This is the appli ca tion rate that the control
console will lock onto when
operating in AUTO.
TARgET
RATE
APP. RATE
TEST SPEEd:
Enter the value to be used for simulating
speed for perform ing Pre-
Field System Checkout. The
console will use this speed
for simulating spraying
operations. The test speed value is only used
while in calibration mode. Once CAL is exited,
the Test Speed value is reset to zero.
dO
NOT ENTER A TEST SPEEd UNTIL ALL OThER vALUES
ARE PROPERLy AdjUSTEd. Please refer to Pre­Field System
checkout for details.
TEST
SPEEd
SPEEd
UNITS OF MEASURE ChART
ENgLISh METRIC TURF
AREA Acres hectares 1000 Sq Ft
vOLUME
Gallons liters Gallons
SPEEd
Miles/Hr kilometers/Hr MIles/Hr
dISTANCE Feet meters Feet
PRESSURE Lbs/Sq In bar Lbs/Sq In
FLOw RATE
Gallons/Min liters/Min Gallons/Min
SPRAy RATE
Gallons/Acre liters/hectare Gal/1000 Sq Ft
ExITINg CALIBRATION:
Upon completion of the calibra-
tion process, exit calibration by pressing and holding the CAL
button until the RED warning light stops flashing (ap prox-
i mate ly three sec onds). Basic cal i bra tion is now com plete.
BEFORE beginning application, confirm that the system is set
up to do the job that you want it to. Please refer to Pre­Field
System checkout on pages 35 ­ 36 to confirm cal i bra tion
settings, nozzle selec tion and overall system per for mance.