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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

)