DMTA-10004-01EN, Rev. D, November 2016
Custom Setups for Single Element Transducers
237
The initial gain parameter often helps reduce the interface echo amplitude and
permits the use of a shorter interface blank. Check the interface blank settings with
the transducer both coupled to and uncoupled from the test material.
Figure 13
‑
14 Examples of the interface blank in mode 2
In mode 3, the interface blank selects which pair of back-wall echoes are measured
(see Figure 13-15 on page 238). In most conditions, the interface blank would be set
just short of the first back-wall echo. However, as a practical matter, the first back-wall
echo from thin materials is often distorted or lost in the interface echo. With some
challenging geometries (such as tight radii), later pairs of back-wall echoes may be
cleaner than early ones. In these cases, set the interface blank to a length that ensures
detection of a clean and well-defined pair of back-wall echoes, even if echoes are not
the first two.
Gage reading trailing edge of the interface
echo
Interface blank set correctly
Summary of Contents for 38DL PLUS
Page 9: ...DMTA 10004 01EN Rev D November 2016 Table of Contents ix Index 297 ...
Page 10: ...DMTA 10004 01EN Rev D November 2016 Table of Contents x ...
Page 28: ...DMTA 10004 01EN Rev D November 2016 Important Information Please Read Before Use 16 ...
Page 30: ...DMTA 10004 01EN Rev D November 2016 Introduction 18 ...
Page 50: ...DMTA 10004 01EN Rev D November 2016 Chapter 2 38 ...
Page 60: ...DMTA 10004 01EN Rev D November 2016 Chapter 3 48 ...
Page 102: ...DMTA 10004 01EN Rev D November 2016 Chapter 6 90 ...
Page 222: ...DMTA 10004 01EN Rev D November 2016 Chapter 11 210 ...
Page 254: ...DMTA 10004 01EN Rev D November 2016 Chapter 13 242 ...
Page 274: ...DMTA 10004 01EN Rev D November 2016 Chapter 14 262 ...
Page 286: ...DMTA 10004 01EN Rev D November 2016 Chapter 15 274 ...
Page 294: ...DMTA 10004 01EN Rev D November 2016 Appendix A 282 ...
Page 300: ...DMTA 10004 01EN Rev D November 2016 Appendix C 288 ...
Page 306: ...DMTA 10004 01EN Rev D November 2016 List of Figures 294 ...
