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How to measure with the DGS
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.
Krautkramer USN 52R/USN 52L Option DGS
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.
Issue 02, 03/99
Introduction
DGS-7
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