Appendix B
258 OmniSeed™ Viper Pro™ Installation & Operation Manual
2. Touch Next.
Note: The PWM Manual Cal and Auto Cal buttons will be displayed only if a PWM or PWM Close is the
selected valve type. See the Application and Control Valve Type(s) section on page 40 for more
information on the valve type selection.
3. Touch the PWM Manual Cal button. The Min PWM Calibration screen will be displayed.
The field computer will display the current monitored conditions at the node and the current minimum PWM
value set on the field computer. The field computer will also display the following information based on the
type of application system:
• For a liquid application system, the pressures at the transducer locations will be displayed.
• For a dry or granular system, the field computer will display the product rate and volume per
minute and the currently set minimum PWM value.
4. Use the up or down arrows at the bottom of the screen to adjust the displayed Current Min PWM value.
Adjust the minimum value so that:
a. either the minimum desired boom pressure is achieved or the required pressure to achieve spray
pattern is observed at the spray tips when controlling a liquid application.
Note: If an electronic pressure transducer is not installed, a manual gauge must be used to calibrate the
Min and Max PW.
b. either the belt just begins to move or just stops moving when controlling a granular application.
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