Eish has some tips for ET:
Know the limitations of each probe configuration regarding frequencies and depth of penetration.
Use your calibration block or test piece frequently during inspections especially when permeability changes cause the constant change of position of the graticle.
Know the limitations of each technique that you employ.
The use of non-conductive guides is helpful especially when scanning around boltholes and edges.
Perform coating thickness measurements especially when moving from one inspection location to another.
