Angle Beam Point of Incidence (Miniature Angle Beam Block)

Figure 1-16. Straight Beam Distance with Miniature Angle Beam Block

Figure 1-19. Angle Determination with IIW Block

TM-1-1500-335-23 Nondestructive Inspection Methods Manual
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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

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