eddy current results do not correlate
eddy current results do not correlate
(OP)
Had an eddy current test on our condenser SS tubes in 2001. Results indicated 20-49% wall loss. Rechecked same tubes last week and results indicated no wall loss. I am reasonably sure the metal did not grow back.
What factors could account for the disparity in results? Cleanliness? Moisture? Calibration? Any ideas would be helpful.





RE: eddy current results do not correlate
you would need to calibrate on similar material preferable a section of the same tube with a known defect
cleanliness important scale will cause odd results
operator competance?
RE: eddy current results do not correlate
Like aybee said above, make sure that you have a calibration tube.