micro-trak MT-3405F II, Справочное руководство

Страница: 20 / 62

20
Drive Shaft Speed Sensor Calibration
NOTE: If you have mounted the magnetic speed sen sor on
a wheel, skip this step and go on to Fine Tuning Speed/
Distance Calibration Values.
Because of the difference in wheel-to-drive shaft ra tios, it is
difficult to determine a calibration value for installation on
a drive shaft by measuring a wheel. You must start with an
estimated calibration value and then fine-tune the cal i bra tion.
Any number between 10 and 15 (255 mm to 380 mm) is a
good starting value.
NOTE: For fine-tuning the SPEED CAL value, see Appendix B
on page 44.
Illustration 15
To determine SPEED CAL, measure the distance of
one complete wheel revolution and divide by the
number of magnets installed.
For the console to calculate the correct speed and
measure distance accurately, the circumference of the
sensor-equipped wheel must be entered. Determine the
circumference of the sensor-mounted wheel to the nearest
tenth of an inch (tenth of a centimeter) with the fol low ing
method:
METHOD
Mark the tire with a piece of chalk and mea sure the distance
traveled on the ground for one com plete rev o lu tion. See
Illustration. For improved accuracy, it is recommended
that you perform this function in field conditions, measure
several revolutions, and take the average.
Divide the measured revolution by the number of magnets
installed to get your starting SPEED CAL calibration value.
Once calibration of the system is complete, this number
should be fine-tuned for optimum accuracy.
For fine-tuning the SPEED CAL value, see Appendix B on page 44.
TEST SPEED:
Test speed is a built-in ground speed simulator
that is used in performing pre-field checks. When a typical
operating speed is entered, the MT-3405F II will
respond as if you were actually driving that
speed. It allows you to simulate your spraying
application with water, while remaining
stationary, to make certain that all of the
equipment is operating
properly and that your
sprayer can actually
perform the intended
application. Test speed will not accumulate Distance or Area
measurements. (The CAL indicator flashes to remind the user
that TEST SPEED mode is active.) TEST SPEED is cancelled by
exiting CAL.
TEST
SPEED
SPEED
Calibration Factor Measurements Effected
Default Values
English Metric
TARGET RATE Application Rate in Auto 10.00 gallons/acre 100.00 liters/hectare
ADJUST RATE Amount of increase or decrease per +/- press (in auto) 1.00 gallons/acre 10.00 liters/hectare
WIDTH BOOMS 1-3* Area, Application Rate 240 inches 6.000 meters
SPEED CAL Distance, Area, App. Rate, Area/Hour 0.189 inches 4.44 centimeters
MINimum FLOw App. Rate, Lowest Allowable Flow Rate 0.0 gallons/minute 0.0 liters/minutes
FLOW CALibration Flow/App. Rats, Volume 145.0 pulses/gallon 145.0 pulses/gallon
INLINE/BYPASS Application Rate Bypass Bypass
TEST SPEED none 0.00 0.00
* BOOMS 4 AND 5 ARE SET TO 0.
Calibration
(cont)
Determining the SPEED CAL
Factory-Loaded Calibration Values
EXITING CALIBRATION:
Upon completion of the cal i bra-
tion process, exit calibration by pressing and holding the
CAL button until the RED warning light turns off (one sec-
ond). 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 Pre-Field System
Checkout to confirm cal i bra tion settings, nozzle se lec tion
and overall system per for mance. NOTE: You must exit CAL
to save any changes.