Epson USN 52R, USN 52L manual DAC mode

Operation Echo evaluation with DAC/TCG

DAC mode

–Peak the echo of an assumed flaw and shift the gate so that the echo data are evaluated.

–You can read the sound path in the measurement line and, in addition with angle-beam probes, the (reduced) projection distance and the flaw depth. You can immediately see from the A-scan whether or not the echo has to be recorded.

The recording threshold violations in dB can also be easily determined:

–Adjust the gate threshold exactly to the point of intersection of the curve with the assumed flaw indication.

The enlarged reading in the A-scan indicates the amount of dB by which the flaw echo exceeds the curve, i.e. the amount by which the echo indication exceeds the reference echo.

5-32 Issue 05, 02/00 Krautkramer USN 52R/USN 52L