Epson USN 52L User Manual

Page 182

Krautkramer USN 52R/USN 52L Option DGS

Issue 02, 03/99

DGS-7

The advantage of this method lies in the fact that you
can carry out reproducible evaluations of small
discontinuities. The reproducibility is especially impor-
tant if you want to carry out e.g. an acceptance test.

Besides the influencing factors already mentioned,
there are other factors that determine the curve shape:

• sound attenuation,

• transfer losses,

• amplitude correction value,

• probe.

The probe influences the curve shape by the following
parameters:

• element diameter,

• frequency,

• delay line length,

• material velocity in the delay line.

You can adjust all these parameters on the USN 52R/
USN 52L option DGS so that you are able to use the
DGS method with many different probes and on differ-
ent materials.

There are 13 frequently used probes with their corre-
sponding data already stored in the instrument; you can
enter data for 1 more probe. You should allocate one
data set to each probe.

How to measure with the DGS

Introduction