Dickey john nh3 conversions, Conversion formulas, Nh3 c – Ag Leader InSight Ver.8.0 Users Manual User Manual
Page 294: Ickey, Onversions, Onversion, Ormulas
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• PWM Gain
- Default Value: 20
- This setting determines how aggressively the control valve responds when making rate change
adjustments. The higher the value the more aggressive the response is.
• Zero RPM Offset
- Default Value: 30
- This setting represents the maximum duty cycle that is sent to the control valve without producing any
hydraulic flow from the PWM valve. Using too high of a Zero RPM Offset value can cause the product
control system to not properly shut off. See PWM valve manufacturer information for recommended
settings.
• Allowable Error
- Default Value: 2%
- 2% - 3% is the normal dead band setting range.
Too low of a setting value can cause the product control system to continually hunt for the target
application rate.
Too high of a setting will cause excessive product application error.
• Auto Control Check Box
- Default is unchecked
- Checking the Auto Control check box allows you to control the spinner speed.
D
ICKEY
J
OHN
NH3 C
ONVERSIONS
C
ONVERSION
F
ORMULAS
The following formulas can be used to convert the Dickey John flow sensor constant to a value that
represents pulses/gallon of anhydrous ammonia for use by the display.
Note: The flow sensor constant is tagged on the Dickey-John flow meter. The density setting comes from a
chart in the Dickey-John documentation and is not provided in this manual.
Conversion Formula
Formula for flow meter calibration for Dickey John reading pounds of anhydrous
Flow sensor constant (pulses/in
3
) X 1728 (in
3
/ft
3
) X 5.11 (lbs of anhydrous/gal)
Density (lbs. of anhydrous/ft
3
)
Formula for flow meter calibration for Dickey John reading pounds of Nitrogen
Flow sensor constant (pulses/in
3
) X 1728 (in
3
/ft
3
) X 4.22 (lbs of N/gal)
Density (lbs. of N/ft
3
)