Dakota Ultrasonics MVX - Manual (Page 111)

MVX High Performance Thickness Gauge
CHAPTER TWELVE
USING THE FLAW MODE FEATURE
12.1 Introduction to Flaw Mode
The Flaw Mode feature was added to the MVX to provide inspectors with a basic
prove-up flaw detection mode using an angle beam transducer. This mode enables
inspectors to locate porosity, defects, inclusions, and cracks in a variety of test
materials. Angle beam transducers, are transducers attached to a delay line wedge
at specific angles. Some of the more common angles are 45°, 60°, and 70°. The
sound wave is introduced into the test material at a specific angle, and converted
from a longitudinal wave into a shear wave. The introduction at specific angles
enables inspectors to steer the sound wave in a specific direction according to the
position and location of specific types of defects.
Angle Beam Transducer Weld Inspection