910-269-EN, Rev. B, June 2011
Calibrating the EPOCH 1000 Series (Phased Array Mode) 297
The A-scan on the left side of the screen is replaced by a new view representing
the thickness reading (yellow line) for the gated indication across all focal laws.
Ideally, this thickness reading line should be a straight line, indicating that the
instrument is making the same thickness measurement from the same reflector at
each focal law. A dotted-line through the center of this small window represents
the user-defined known value of the actual thickness measurement. In this
example, the uncalibrated line should look like the one shown in
Figure 17-20 on
page 297.
Figure 17-20 The Wedge Delay acquisition screen
10. Move the probe forward and backward to acquire uncalibrated thickness
measurement data across all focal laws.
To acquire the most accurate curve, move the probe slowly. Use a guide when
possible to avoid probe skew. Make multiple passes over the reflector.
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