Epson USN 52L, USN 52R manual DGS-7

How to measure with the DGS Introduction

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.

Krautkramer USN 52R/USN 52L Option DGS Issue 02, 03/99 DGS-7