910-269-EN, Rev. B, June 2011
330 Appendix B
Through
transmission
A test method in which the vibrations emitted by one
transducer are directed toward, and received by, another
transducer. The ratio between quantity of vibration sent
and received is a measure of the integrity, or quality of the
material being tested.
Time-varied gain
(TVG)
Circuit that automatically adjusts the gain so that the echo
amplitude of a given size reflector is displayed at a
constant data display height regardless of the distance to
that given size reflector.
Transducer A device that transforms one form of energy into another.
Transmitter Circuit of the flaw detector that sends the initial pulse
voltage to both the transducer and receiver.
Ultrasonic Of or relating to frequencies above the human audible
range; for example, above 20,000 cycles/s (20 kHz).
V-path The angular distance sound travels, measured from the
top surface of the material to the bottom, and reflecting
back up to the top surface.
Vertical B The larger length (if rectangular) of the actual crystal. The
software computes the “effective length” automatically.
Wavelength The distance between similar points on successive wave
fronts; such as the distance between any two successive
particles of the oscillating medium that are in the same
phase. It is denoted by the Greek letter λ (lambda).
Table 37 Glossary (continued)
Term Definition
Downloaded from ManualsNet.com search engine
To Next Page
Loading...
