DMTA-10055-01EN, Rev. A, February 2015
Chapter 11
284
2.
Use the knob or arrow keys to change the
Status
parameter (P7) to
On
.
3.
The measurement box automatically changes to measure Gate 2 – Gate 1.
4.
Choose the
Rcvr
menu item (group 1/4).
5.
Use the knob or arrow keys to change the
Rect
parameter (P1) to
RF
so you can
view the positive and negative amplitude values.
Figure 11-42 Corrosion Module echo measurement
As a result of the roof angle of dual transducers, often a shear wave is also produced
in the inspection material when using a dual probe. Shear wave velocity is slower
than longitudinal wave, so the shear component is displayed after the first backwall
echo. If the shear wave component is significant enough to cross the measurement
threshold, it can trigger a false measurement from the gate 2 region in Echo-to-Echo
mode. This causes a measurement error (see Figure 11-43 on page 285).
Summary of Contents for EPOCH 650
Page 12: ...DMTA 10055 01EN Rev A February 2015 List of Abbreviations xii...
Page 30: ...DMTA 10055 01EN Rev A February 2015 Introduction 18...
Page 54: ...DMTA 10055 01EN Rev A February 2015 Chapter 1 42...
Page 84: ...DMTA 10055 01EN Rev A February 2015 Chapter 3 72...
Page 126: ...DMTA 10055 01EN Rev A February 2015 Chapter 5 114...
Page 148: ...DMTA 10055 01EN Rev A February 2015 Chapter 7 136...
Page 154: ...DMTA 10055 01EN Rev A February 2015 Chapter 8 142...
Page 236: ...DMTA 10055 01EN Rev A February 2015 Chapter 10 224...
Page 332: ...DMTA 10055 01EN Rev A February 2015 Appendix B 320...
Page 342: ...DMTA 10055 01EN Rev A February 2015 Appendix C 330...
Page 346: ...DMTA 10055 01EN Rev A February 2015 Appendix D 334...
Page 362: ...DMTA 10055 01EN Rev A February 2015 Index 350...
