40
.....Z method
FIGURES 4.4-D THROUGH 4.4-I (LEFT TO RIGHT, TOP TO BOTTOM)
10. Draw a horizontal line along the pipe from the centerline of the 3 o’clock transducer position. Refer to
Figure 4.4-J (below), and use a level to ensure that the line is level with the top of the pipe. The line
should be at least 3 inches (76 millimeters) longer than the transducer spacing calculated by
UltraScan. For example, if UltraScan calculates the spacing as 14 inches (356 millimeters), draw a line
17 inches (432 millimeters) long.
11. Measure the spacing from the inside edge of the 3 o’clock transducer, and mark this on the pipe
Figure 4.4-K, below).
FIGURES 4.4-J (LEFT) & 4.4-K (RIGHT)
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