17
Calibration
(cont.)
Entering Calibration Values
FLOW CAL:
This position is used to calibrate the flowmeter for
accurate NH3 mea-
surement. When this
position is selected,
the display will show the flowmeter
calibration value and the "CAL" icon will be
displayed. The flowmeter calibration value
is the number shown along with “CAL" and
“HOLD” on the display. Use the"+" and "-"
buttons to enter the number stamped on the
tag attached to the flowmeter. Every NH3 type flowmeter is
calibrated for “N” at the factory. However, the value should
be fine-tuned to ensure best accuracy in the system.
Please
refer to Fine-Tuning Flowmeter Calibration in Appendix C.
MIN FLOW:
The purpose of this calibration parameter is to
prevent the system from applying below the recommended
minimum rate for
the flowmeter. Enter
a value of 10.0 lbs./
min. (5.0kg/min.) for this calibra-
tion parameter. 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.
ADJUST RATE:
Enter the value for the desired amount of
change in pounds of actual “N” per acre (kg per hectare) to
be used for making on-the-go rate adjust-
ments when operating in AUTO. For example,
if a value “5.0”is
entered, you will be
able to increase and
decrease your appli-
cation rate in five-pound (kg) increments during operation
in AUTO. To disable this feature, simply enter “.0” for a value.
TOTAL NH3
(1) (2) (3)
FLOW
CAL
NH3 PER
MINUTE
MIN
FLOW
TANK (NH3)
ADJUST
RATE
TARGET RATE:
Enter the value for the desired target appli-
cation rate in pounds of actual “N” per acre (kg per hectare).
This is the application
rate that the control
console will lock onto
when operating in
AUTO.
RATE
ACTUAL “N”
TARGET
RATE
CAUTION: Nurse tank must NOT be connected during this
process below.
WIDTH CAL:
Use the "+" and "-" buttons to enter the effec-
tive working width, in inches (meters) for the tool bar;
See
“Working Width” on
the next page.
AREA
(1) (2) (3)
WIDTH
CAL
SPEED CAL:
This position is used to calibrate the speed
sensor for accurate speed and distance measurement. When
this position is selected, the display will show the SPEED CAL
value.
NOTE: The SPEED CAL value is in centimeters when
using metric units.
To fine-tune speed
calibration for optimal
accuracy, see Fine Tun-
ing Speed Calibration,
Appendix B.
DISTANCE
SPEED
CAL
FM750 N Flowmeter
P/N 10899
Micro-Trak liquid cal - 152
Micro-Trak NH3 cal - 34.9
Pulses per gallon - 76.0
Pulses per 10 gallons - 760
S/N 000000000
FM750 N Flowmeter
P/N 10899
Micro-Trak liquid cal - 152
Pulses per gallon - 76.0
Pulses per 10 gallons - 760
S/N 000000000
