Seed Hawk Raven 2012 - Manual (Page 254)

Appendix C
242 Seed Hawk® Viper Pro™ Installation & Operation Manual
4. Adjust the Min PW to the minimum value by:
a. For liquid systems, use the up or down arrows to adjust the valve until either pressure is observed or
the minimum desired pressure is achieved.
b. For granular systems, use the up or down arrows to adjust the belt speed until either the belt just
begins to move or just stops.
Note:
Increase or decrease the step sizes for the up arrow and down arrow buttons by either selecting 1
or 10 for the step size.
If an electronic pressure transducer is not installed, a manual gauge must be used to calibrate the
Min and Max PW.
5. Press the Set Min PW to enter the minimum PW setting.
Note:
The calculated value for the Min PW setting will be reduced by 10.
6. Press the Next button. The Max PWM Calibration screen will display.
7. Adjust the Max PW to the maximum value by:
a. For liquid systems, use the up or down arrows to adjust the valve until the maximum desired pressure
is observed on the pressure indicator.
b. For granular systems, use the up or down arrows to adjust the belt speed until the maximum desired
belt speed is observed.
Note:
Increase or decrease the step sizes for the up arrow and down arrow buttons by either selecting 1
or 10 for the step size.
8. Press the Set Max PW button to enter the maximum PW settings.
9. Press OK to complete the PWM calibration procedure. A screen will display showing the current PWM
settings and the new PWM minimum and maximum values.