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
DFX-7
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.
