Owner's manual

Appendix D
208 Seed Hawk™ Viper Pro™ Installation & Operation Manual
Valve Speed Digit
This value controls the response time of the control valve motor. If you set the valve speed too fast, the valve
will over correct and the system can start to oscillate. The following valves have specific values:
• Standard Control Valve: This valve has a range of values from 1 to 9, with 1 being slow and 9 being fast.
• Fast and Fast Close Control Valve: These valves have a range of values from 0 to 9, with 0 for fast and 9
for slow.
Brake Point Digit
The Brake Point digit sets the percent away from the target rate at which the control valve starts to turn at a
slower rate so that it does not overshoot the target rate. The values range from 0 to 9, where 0 is a 5% rate, 1
is a 10% rate, and 90 is a 90% rate.
Dead Band Digit
The Dead Band digit is the allowable difference between the target rate and the actual application rate. The
values range from 1 to 9, where 1 equals 1% difference and 9 equals 9% of the difference.
Verifying Flow Rate Limits
The flow rate of application of a liquid product must be within the range of that specified for the flow meter. The
following table displays the flow meter, range, and average calibration number.
Calculating Meter Calibrations
The flow meter calibration value is stamped on the tag that is attached to each flow meter. Use this number
when programming Viper for the calibration.
Flow Meter Model Flow Range
Average Meter Cal
Value
RFM 5 0.05 to 5 GPM 5500
RFM 15 F 0.3 to 15 GPM 1750
RFM 60P/S 1 to 60 GPM 720
RFM 100 3 to 100 GPM 700
RFM 200/200 Poly 15 to 200 GPM 164
RFM 400 25 to 400 GPM 80