Near Intersection of I-35 & I-90 Southern Mn. | Gary - Since you are using a 750, there is a module on the pump itself that is referred to as a "motor control".
It's purpose in life is to Start/Stop the pump motor and run it at the appropriate speed to deliver the proper amount product at any given time.
The motor control uses a Pulse Width Modulated scheme to run the motor and thus the pump at varying speeds. The motor control does this by switching the Ground On/Off to the motor. If the Ground is constantly connected, the motor will run at maximum speed. If the Ground is not connected, the motor stops. If the Ground is connected/disconnected quickly, the motor will run at some speed between Stop and Maximum. The Raven console senses the speed of the pump, calculates the amount applied and compares it to the target rate desired. If the rate is not in close agreement with the target rate, a corrective pulse is sent down the Green/Yellow pair of wires. This pulse tells the motor control to increase/decrease the motor speed.
The wires that connect to the motor control have the following purposes: 2 or 3 red wires for +12V from the battery to the module, 2 or 3 white wires which are for Ground from the battery to the module, a gray wire that signals the motor control to Start/Stop the pump and a Green and Yellow Pair that tells the motor control to Speed Up/Slow Down the pump.
You want to splice onto the gray wire somewhere along its path from Pin AN (for Product 3) in the console to the motor control. You do not want to tap on to the Green or Yellow wire since they will only be "hot" if a speed change is needed.
Edited by tedbear 7/27/2006 07:06
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Logging/mapping Raven 750 Product 3 w/SiteMate
