Seed Hawk Raven 2012 - Manual (Page 246)

Appendix C
234 Seed Hawk® Viper Pro™ Installation & Operation Manual
6. Record the distance from the field computer Tally Registers screen.
If the distance display on the Tally Registers screen matches the measured test distance, the calculated
speed cal is correct. If the distance display does not match, repeat the Using the Calibration Assistance
section on page 231 to recalculate the speed cal automatically or use the Speed Cal Formulas section on
page 234 to manually calculate the speed cal value.
Note:
If a test distance of one mile [1 km] is used, the distance value displayed on the Tally Registers
screen should be 5280 feet [1000]. If the value displayed in the Feet [Meters] field is between
5260 [980] and 5300 [1020], the current speed cal value is correct.
Speed Cal Formulas
Perform the following calculation to determine the speed calibration
where OSC = the Old Speed Cal value, D = the Viper Pro odometer reading, and CSC = the Corrected Speed
Cal.
For Example:
Using the default Speed Cal of 598 [152], and a Viper Pro odometer reading of 5000 feet [980 meters]:
in English Units:
the Corrected Speed Cal is 631.
in Metric units:
Therefore, the Corrected Speed Cal is 155.
7. Enter the corrected speed cal of 631 [155].
8. Confirm that the new Speed Cal is correct by repeating the procedure in the Verification of the Speed Cal
Value section on page 233.
OSC 5280 ×
D
------------------------------ CSC =
598 5280 Ч
5000
--------------------------- 631 =
152 1000 Ч
980
--------------------------- 155 =