Distance amplitude correction (DAC) provides a means of establishing a graphic ‘reference level sensitivity' as a function of sweep distance on the A-scan display. The use of DAC allows signals reflected from similar discontinuities to be evaluated where signal attenuation as a function of depth has been correlated. A Distance Amplitude Correction (DAC) curve is used to plot the variation in amplitude between reflectors of the same size at varying distances from the transducer.
Used for establishment of primary reference response for UT examination of welds.
⦁Block contains three side-drilled holes at 1.5" deep minimum at different diameter holes such as 3/32", 1/8” and 3/16” diameter.
⦁Hole locations through the thickness are ¼, ½, and ¾T.
⦁Materials available: A516-70 Steel, 7075-T6 Aluminium, 304 Stainless Steel or as per customer need.