During an inspection, calibration is usually performed on Side Drilled Holes (SDH) or Flat Bottom Holes (TFP).
Side Drilled Holes (SDH) are used:
- For probe calibration
- As reflectors for the reference amplitude
Flat Bottom Holes (FBH) are often used:
- For probe calibration
- As reflectors for the reference amplitude
- To determine the effective diameter of a beam
- To calculate the DGS (Distance Gain Size) curves