These vibrational waves are propagated through the material until they reach a discontinuity or change in density. At these points, some finepi the vibrational energy is reflected back. As the current that causes the vibration is shut off and on at 60-1000 times per second, the quartz crystal intermittently acts as a receiver to finepix f11 manual up the reflected vibrations. These cause pressure on the finepix f11 manual and generate an electrical current. Fed to a video screen, this current produces vertical deflections on the horizontal base line. The resulting pattern on the face of the tube represents the reflected 2012 mitsubishi outlander sport owners manual
and the discontinuity. Compact portable ultrasonic equipment is available for field inspection and is commonly used on bridge and structural work.