YUSHI INSTRUMENTS
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hollows of R100mm reaches its highest level. The sound path value will be displayed at the top left
corner on the screen, if the value isn't 100mm, press to enter the probe menu, press (up) or
(down) to select the probe zero submenu, then press (left) or (right) to set the value as
100mm. or direct press
to calibrate the probe zero automatically.As shown in Figure 4-6, the
probe zero calibration is finished.
5. Calibrate the probe K value (angle): couple the probe to the CSK-IA test block and move it back and
forth, as shown in Figure 4-7, till the reflection echo of the circle of φ50mm reaches the highest level,
use a steel ruler to measure L, and calculate K value according to k=(L+X-35)/30. As shown in Figure
4-9, press to enter the probe menu, press (up) or (down) to select the probe K
value submenu, then press (left) or (right) to set the value as the K value calculated. As
shown in Figure 4-9, or direct press
to calibrate the K value automatically.
Note: this method is adopted if a probe beyond K2 is used, if a probe below K2 is used, the other side
should be adopted, as shown in Figure 4-8, the method is same, and the computing formula is
k=(L+K-35)/70. L is the length from the front end of the probe to the test block boundary, X is the front
edge value of the probe.
Figure 4-6