47
WIDTH
CAL
FLOW
CAL
MIN
FLOW
ADJUST
RATE
TARGET
RATE
SPEED
CAL
INLINE
BYPASS
TEST
SPEED
VOLUME /
MINUTE
DISTANCE
AREA /
HOUR
VOLUME
(1) (2) (3)
RATE
SPEED
AREA
(1) (2) (3)
ON
OFF
1
2
3
4
5
B O O M S
RUN
HOLD
CAL
AUTO
MAN
RESET
ON / OFF
____
APPLICATION RATE
TANK
___
MANAUTO
CAL
HOLD
This procedure is used to verify the speed/distance
calibration. In order to achieve accurate measurements,
each step in this fine tuning procedure should be
performed as precisely as possible.
CAUTION: Do not perform this procedure with the nurse
tank connected to the system.
PREPARATION
•
Once the system is fully installed and calibrated, se lect
a straight tract of ground that is similar to your ac tu al
field conditions and as level as pos si ble.
NOTE: Us ing a course with a different ground sur-
face, such as a hard-surface road, will re sult in dif fer-
ent read ings than exact field con di tions.
•
Measure a distance of 1000 feet (500 meters).
Clear ly mark the beginning and end points with
flags or some thing highly visible to the operator.
PROCEDURE
1. With the console turned ON, place the Run/Hold switch
in the HOLD position. The HOLD icon will be displayed.
Turn the rotary dial to the “DISTANCE” position. Be sure
the display shows 0. If not, reset the distance counter
by pressing and holding “RESET” until the display
returns to 0 (approximately one second). The word
CLEAr
will be displayed when reset is pressed.
2. You are now ready to drive the measured course. Pick
a location on the vehicle to use as a marker for starting
and stopping the distance counting function (door
handle, mirror, step, etc.). You should begin driving the
course well ahead of the starting flag and drive past the
ending flag, using the Run/Hold switch to start and stop
the counting function. It is not recommended to start
from a dead stop at the starting flag and stop at the
ending flag.
3. Place the Run/Hold switch in RUN when the marker
on the vehicle passes the starting flag to activate
the distance counting function. The console display
numbers will increase, adding to the distance total as
you drive. Drive the pre-measured course and place
the Run/Hold switch in HOLD, when the marker on the
vehicle passes the ending flag, to stop the distance
counting function. The console display should read
“HOLD”.
See Illustration.
Stop the vehicle in a level
and safe area and continue with this procedure.
4. With the rotary dial still at DISTANCE (SPEED CAL), press
and hold the “CAL” key for one second. Once the con-
sole is in “CAL,” CAL and the speed calibration value
will be displayed. Momentarily press CAL and the word
CAL will begin to flash and the distance travelled will be
displayed.
5. When the display shows distance (“CAL” is flashing),
ver i fy wheth er the number displayed is the ex act dis-
tance you drove (with in +/- 1 - 2 %). If not, press the
“+” or “-” key to ad just the fig ure to match the dis tance
you ac tu al ly drove. If the display reads too high, use the
“-” key to lower the dis played value. If the display reads
too low, use the “+” key to raise the displayed value.
6. When the number shown on the display match es (as
close ly as possible) the ac tu al dis tance driv en, you
have ar rived at the cor rect cal i bra tion val ue. If you
can not adjust the displayed distance to exactly match
the actual dis tance driven, adjust the figure as close
as possible to the actual distance. You may check the
calibration number by momentarily pressing CAL. The
word CAL and the SPEED CAL number will appear. Exit
“CAL” by pressing “CAL” for one second.
The speed sen sor is now calibrated. To verify proper
calibration, repeat the procedure a sec ond time. Write
down the new speed calibration number and keep it in a
safe place. If the cal i bra tion values are ever accidentally
changed, you can simply re-en ter this num ber.
Appendix E
(cont)
Fine Tuning Speed/Distance Calibration Val ue - NH3 Systems
