Near Intersection of I-35 & I-90 Southern Mn. | tedfarmer - 4/19/2014 14:29
That worked but what do I use for the cal, gallons or nh3 units
Now that you are out of granular mode, you can make the decision whether to use gallons or NH3 units. It CAN work fine either way. If you use the meter cal for gallons then your target rate will need to be entered in the "desired number of gallons of NH3/acre that you desire". The totals will be in gallons as well.
Most farmers prefer to think and work in terms of Pounds of Actual "N"/acre. If that fits you, then use the NH3 units number on the flowmeter. This is a calculated number to convert the gallons of NH3 going through the flowmeter into Pounds of Actual "N". This will allow you to set your target rate as Pounds of Actual "N"/acre in as the target value. The totals will be in pounds of Actual "N" rather than pounds of NH3. When comparing the Raven total against the scale ticket weight be certain to take 82% of the scale weight.
For example, if you desire to apply 150# of actual "N"/acre, use the NH3 meter cal and enter 150.0 as the target rate. When you switch tanks, write down the Volume number shown on the display. When the tank is weighed back at the supplier, take .82 times the scale ticket and compare it with the Raven total. They should roughly agree.
As you are probably aware, the 660 does not come with built in switches since it is commonly used in SP rigs that have their own. In can work fine for NH3 with a tractor but a Master switch needs to be added to a regular 440 console cable. Sometimes we would add a Master switch to the 660 for such purposes rather than modify the cable.
If you have not done this, one way is to connect a common switch to the Orange wire in the Raven console cable. This will be 12V whenever the Power switch is ON. Put a black wire on the other side of the switch and splice it to the black wire in the console cable harness. Be sure to splice rather than cut the black wire. The new black wire from the switch needs to connect to the existing black wire so that 12V can go "both ways".
With the Power Switch ON, this switch can then send 12V to the black wire which will open the NH3 valve and backfeed the 660 so that it "knows" that the section is ON.
Edited by tedbear 4/20/2014 07:46
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Raven 660 HELP
