...
- (a) be portable (easily carried and handled by a single person), (b) operate on standing trees, and (c) provide readings without substantially damaging the trees tested.
*The devise must provide a determination within 10 minutes, including the time to set up a test and interpret the measurements.
*The devise should estimate the degradation of strength to within 10% of the competent wood strength with a 90% confidence.
*Supporting algorithms (formulae) and/or software must be provided and documented.
*The device should cost no more than $500.
...