ASTM E317 Test Block Figure 6 (Inch Version) Special Alloy
E317 resolution block, Figure 6 is used for evaluating the resolution
characteristics of ultrasonic pulse-echo systems. ASTM E317 Figure 6. Using this block, adjust the
instrument controls to set the system sensitivity to the specified level
without excessive loss of resolution. To obtain optimum sensitivity/resolution
performance, adjustment of pulse length as well as one or more gain controls
will frequently be necessary. If an immersion test, make certain that the
search unit is positioned laterally for maximum hole-signal amplitude and
aligned for interface perpendicularity. Except for interface peaking, no lower
gain may be used thereafter, although higher may be required as described.
Resolution, either entry or far surface, is determined as follows. Using the established sensitivity, reposition the search unit over each specified hole in
turn to optimize the indication, again making certain that the interface signal
is maximized by alignment of the search unit
Geometry: Six Ø3/64" diameter flat-bottom holes.
Dimensions: 2.00" (W) x 1.00/3.30" (T) x 8.00" (L) Inch
Material: Special Alloy.