DMTA-10055-01EN, Rev. A, February 2015
Chapter 9
152
Figure 9-5 Adjusting zero offset for the first delay line echo
6. Select Auto Cal > Type = Thickness.
7. Couple the transducer to the thin calibration block step. For this example, the
transducer is coupled to the 0.100 in. step.
8. Use the G1Start button (P5 key) to position gate 1 so that the first back-wall echo
from the known thickness step exceeds the gate threshold.
9. Press dB, and then adjust the gain value so that the echo amplitude is at
approximately 80 %.
The AUTO XX% feature automatically adjusts the gain to set the gated echo
amplitude to XX% of full screen height (the default XX value is 80 %). To activate this
feature, press 2
ND
F, (AUTO XX%).
A thickness measurement reading appears in large text above the A-scan (see
Figure 9-6 on page 153).
To Next Page
Loading...
