Dakota Ultrasonics CMX DL plus - Manual (Page 124)

Dakota Ultrasonics
120
1) Press the MENU key once to activate the menu items tab. Press the MENU
key multiple times to tab right, and the ESC key multiple times to tab left,
until the TUNE menu is highlighted and displaying the submenu items.
2) Use the UP and DOWN arrow keys to scroll through the sub menu items
until DAMPING is highlighted.
3) Use the LEFT and RIGHT arrow keys to scroll through the DAMPING values
until the correct value is displayed to the right of the DAMPING menu item.
4) Finally, press the MEAS key to return to the measurement screen and begin
taking readings.
10.9 Introduction to Flaw Mode
The Flaw Mode feature was added to the CMX
DL+
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.