Olympus Sonic 1200S/HR, Руководство пользователя

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98 Chapter 5
Figure 5-33
5.4 Shear Wave (Angle Beam) Testing
The primary method of testing welds is Angle Beam Shear Wave Ultrasonic Inspection. The
angle beam allows testing at the proper angle to detect flaws in the weld zone. This is
accomplished by using a Lucite wedge to convert the ultrasound into a shear wave at the
proper angle. This angle is usually specified in AWS and ASME Standards to obtain the best
results on a particular weld.
The following accessories are required for this setup procedure:
TRANSDUCER — A 2.25 MHz transducer with Lucite wedge is usually used, such as
the Spectrum
™
F2L , with a wedge at the desired angle. The transducer used will depend
on the material, surface condition, and thickness.
TRANSDUCER CABLE — Use a Sonic
®
BNC/Microdot (P/N #9102894) to match the
transducer.
COUPLANT — Use a couplant that “fills in” the surface. On smooth surfaces, use
thinner couplants (water, light oil, or mineral oil). For rough surfaces, Sonic
®
X30S
couplant (P/N #3317450) is more appropriate.