For example – Seed Hawk Raven 2011 User Manual

Page 104

Chapter 4

Seed Hawk™ Viper Pro™ Installation & Operation Manual

Note:

If the prescription map contains zero rate zones for products 4 or 5, the system must have either a
PWM or Fast Valve controlling product. You must also program the valve type to C-PC (PWM
Close) or C-FC (Fast Close) mode, depending upon which valve is installed in the system.

If the system contains a fast valve, the valve must be plumbed into the main product line. You
cannot plumb the valve into a bypass line.

Accessing the Rx Map Menu

Select Menu, then Setup, Maps, and Rx Map. The Rx Map menu appears.

Rx Look-Ahead

The Rx Look-Ahead setting is the number of seconds (determined by vehicle speed) the Viper Pro is allowed to
scan in front of the vehicle’s current position to find rate changes on a prescription map. This feature may help
to compensate for the time it takes a valve to fully adjust to a different rate.

Note:

The Rx Look Ahead setting only affects products controlled in reference to a prescription map

For Example:

If the control valve takes four seconds to adjust to a rate change, setting an Rx Look Ahead value of 2 seconds
will allow Viper to begin adjusting the valve prior to the vehicle entering the new rate zone.

Setting the Look-Ahead Value

Select Menu, then Setup, Maps, Rx Map, and Look Ahead. The Look-Ahead Seconds screen displays.

Using the screen keyboard, enter the look ahead value in the Look-Ahead field.

Press OK. Viper saves the setting and returns to the main screen.