DMTA-10055-01EN, Rev. A, February 2015
Calibration
149
Figure 9-3 Example of a gated signal for velocity calibration
9. Couple the transducer to the thick calibration block step.
In this example, the transducer is coupled to the 0.500 in. step.
10. Use the GATES key to position gate 1 so that the first back-wall echo from the
known thickness step exceeds the gate threshold.
11. Press dB to adjust the gain setting so that the echo amplitude is at approximately
80 %.
A thickness measurement reading appears in large text above the A-scan.
12. Once a steady reading is achieved, choose Auto Cal > Cal-Vel.
The screen freezes and the Enter Value for Velocity Cal box appears (see
Figure 9-4 on page 150).
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