T.O. 33B-1-1
Figure 1-17.
Point of Incidence Determination with IIW Block
1.8.2.6.2
Angle Beam Point of Incidence (Miniature Angle Beam Block).
NOTE
The point-of-incidence as determined in accordance with these procedures
may not correspond with the point-of-incidence placed on the search unit by
the search unit manufacturer.
a.
Move the search unit back and forth from the curved surface at R-2 (see Figure 1-18) the peak signal
from R-2 is obtained.
b.
The search unit point-of-incidence now coincides with the line marked ‘‘0’’ on the block. Mark the
point-of-incidence on the side of the search unit.
Figure 1-18.
Determination of Point of Incidence with Miniature Angle Beam Block
Change 3
1-65
