Measurement Of The Sound Velocity Of The Material - YUSHI YUT-28 Series Manual

YUSHI INSTRUMENTS
Figure 4-2
4. Set Gate A to lock the first echo. Press to make the highest echo reach 80% of the screen. The
sound path value is displayed on the screen. If the vertical sound path is not 25mm, press , then
press (up) or ((down) to select the probe zero submenu. Then press (left) or (right) to
adjust the value till the sound path value reaches 25mm. At this point, the probe zero is calibrated, as
shown in Figure 4-3.
Figure 4-3

4.2.3 Measurement of the Sound Velocity of the Material

1. Set the approximate sound velocity of the material on the sound velocity submenu under the
parameter menu;
2. Couple the probe to the known calibration position of the calibration block (the sound path is known),
open Gate A, adjust the start position of the gate to let Gate A catch the primary echo; open Gate B and
adjust the start position of the gate to let Gate B to catch the second echo.
3. On the gate menu, set the display as Sba, at this point, there appears a ba sign on the screen.
4. Increase or decrease the sound velocity value of the material till the ba value on the screen is equal to
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