10 Operation
RATE
When RATE is selected, target and actual gallons
per acre or pounds of Nitrogen per acre being ap-
plied are displayed.
% ERROR
The purpose of % ERROR is to make it very easy
for the operator to see how close the actual ap-
plication rate is to the desired or target application
rate.
This function computes and displays the percent
error. Therefore, if the actual rate is exactly equal
to the desired rate, it will display 0% error. If, for
example, the actual rate was high by 5% then it
would d5%. If the actual rate was low by
7% then it would display -7% (note the negative
sign).
A quick glance at the display using this mode will
let you know that it is working. Under normal con-
ditions the error will stay less than 10% (positive
or negative) which should be considered accept-
able. Quick speed changes such as shifting gears
on a hillside will obviously cause a significant error.
However, the 8605 will immediately start correct-
ing and the “% ERROR” display will show this.
The 8605 will start making flow adjustments as
soon as the error reaches plus or minus 1%. If the
error exceeds 10% the alarm indicator will flash
and the audible alarm will sound.
The 8605 will then start driving the Servo Valve
at a much faster rate and will soon have the er-
ror less than 10% again. The alarm light will
stop flashing and the audible alarm will stop
“beeping” when the error is less than 10%.
ALARM INDICATOR
1
2
ERROR
MENU
ENTER
O
5
O
RATE
3
4
HOLD
5
RUN
AREA
FIELD
FIELD
VOL.
AREA
TOTAL
TIME
DATE
SPEED
DIST.
TOTAL
VOL
HINIKER
I
O
8605
RATE
RATE
MANUAL
2
1
6
7
8
0
1
2
3
4
9
VPM
DWG. NO. 3135A
This is a handy feature since the operator can
“see” and “hear” when the error exceeds 10% and
“see” and “hear” when the 8605 automatically cor-
rects it.
The 8605 performs the Error (% Error) calcula-
tion very quickly. Therefore, it is normal to see this
mode fluctuate, especially in rough ground condi-
tions where the speed naturally makes many small
changes. For example, a change of 1/4 MPH above
or below 5 MPH would be detected and correctly
computed as a 5% error. When the speed makes
these small changes, the % error display will usual-
ly show 1 or 2 positive error readings followed by 1
or 2 negative readings. It is easy to see that the av-
erage error is 0% and the intermediate fluctuating
readings should not be considered alarming. Both
the applicator and the 8605 are operating properly.
DATA STORAGE
The 8605 has the capability to store 1584 different
applications. These are divided into 99 fields with
16 chemicals per field. Field Area, Field Volume,
Time and Date are saved for each Field/Chemical
combination.
Field and Chemical numbers can be selected in
Change Field & Chemical # (Menu selection 1) or
in Calibration mode (Menu selection 2). The Field/
Chemical application record will be stamped with
the current date and time when Field Volume is
cleared to indicate when the new application record
was started. It will also be tagged as an NH3 re-
cord if Field Volume is cleared while in NH3 mode.
The print out of NH3 application records show the
field volume as pounds of actual nitrogen rather
than as gallons of liquid. To view information on the
current Field/Chemical record, press Field Area or
Field Volume.
