Verifying The Refracted Angle; Figure 9-17 Using The Peak Memory Feature To Find The Bip - Olympus EPOCH 650 User Manual

Figure 9-17 Using the Peak Memory feature to find the BIP

5. Hold the probe stationary once the signal is peaked up and mark the side of the
transducer wedge directly over the 0 mark on the block.
This is the BIP, the point at which the sound leaves the wedge and enters the
material with maximum energy.
9.8.2

Verifying the Refracted Angle

The expected refracted angle of the probe should already have been entered in the
EPOCH 650 in the initial steps of the calibration procedure. Although the wedge may
be marked 45°, for example, the actual refracted angle could be slightly different due
to the properties of the test material or the amount of wear on the wedge. It is
necessary to verify the actual angle. This ensures that the EPOCH 650 sound path
calculations are accurate.
To verify the refracted angle
1. Position the probe over the appropriate angle mark on the block (45° in this
example).
DMTA-10055-01EN, Rev. A, February 2015
Calibration 167