Percent Timer Setting Calculations
Percent Setting By Depth
Percent Setting by Desired Completion Time
Percent Setting By 1" Application
The Equations
These calculators use these formulas to determine the percent timer setting to achieve a specified application depth or completion time.
Percent Setting By Depth
Where:
= The new pivot percent timer setting to achieve desired depth (as a %)
= The pivot percent timer setting to achieve known application depth (as a %)
= Known application depth (in)
= Desired new application depth (in)
Percent Setting By Desired Completion Time
Where:
= The new pivot percent timer setting to achieve desired completion time (as a %)
= The pivot percent timer setting to at known completion time (as a %)
= Known completion time (hrs)
= Desired completion time (hrs)
Percent Setting By 1" Application
Where:
= The new pivot percent setting to achieve desired depth (as a %)
= Pivot full rotation time at 100% (hrs)
= Pivot full rotation time to apply 1 inch (hrs)
= Desired application depth (in)
Reference: Washington State University