Viper 2.08 Specifications download pdf (Page 320)

Viper Installation and Operators Manual 2.08

310

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.

To ensure that you are delivering the proper amount of product to the fields, you

must calibrate the rates for each product applied.

Use the following information to determine which spray nozzle(s) to use to apply the

product:

 Nominal Application Pressure (PSI)

 Target Application Rate (GPA)

 Target Speed (MPH)

 Nozzle Spacing (Inches)

NOTE: Using the above information, you can calculate the gallons per minute

(GPM), per nozzle using the following equation:

GPM = (GPA x MPH x Inches)/5940

For Example:

GPA = 20

MPH = 5.2

Inches = 20

.35 = (20 x 5.2 x 20)/5940

Target PSI = 30

Therefore, you must select a tip that outputs a pressure of 30 PSI and 0.35 GPM.

See the following chart for tips and configuration.

Calculating

Rate

Calibrations

for Liquid

Applications

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Viper 2.08 Specifications Page 320