Error from grade values do not match on iGrade and T3RRA software.

Symptoms:

When stationary, or at very low speeds, the value for error from grade reads 0 on the iGrade display. The error from grade value in the T3RRA software is non-zero and at the expected error value. As soon as you start moving the error value on iGrade returns to expected levels.

Cause:

At low speeds (below iGrade’s activation speed) T3RRA software stops sending iGrade true target elevations. Rather, the T3RRA software returns the current blade height to iGrade. This is done as a safety measure to ensure that the blade will not move, as well as to keep the remote connection alive.

Solutions:

This is a software issue that is being investigated for alternative solutions. Ignore the error value on iGrade when stationary. Make sure your are updated to the latest software version as this problem may have been solved.