A-scan

9.44  A-scan. In ultrasonic testing, method of data presentation utilizing a horizontal base line that indicates distance or time and a vertical deflection from the base line which indicates...

base line

9.43  base line. In ultrasonic testing, the distance trace (i.e., horizontal) across the...

penetration

9.42  penetration. In ultrasonics, the maximum depth in a material from which useful ultrasonic back reflections can be...

dead zone

9.41  dead zone. Distance from the surface of the test object to the nearest depth that can be inspected.

control echo

9.40  control echo. Reference signal from a constant reflecting surface such as a back...

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