DMTA-10084-01EN, Rev. 2, November 2018
Chapter 11
204
Figure 11-43 Echo-to-echo measurement
Shear wave errors in echo-to-echo mode
During a corrosion module inspection in echo-to-echo mode using a dual transducer,
an unwanted shear wave often occurs because of the dual transducer roof angle. Shear
wave velocity is slower than that of a longitudinal wave, so the shear component is
displayed after the first back wall echo. If the shear component crosses the
measurement threshold it can trigger a false measurement from the gate 2 region,
causing a measurement error (see Figure 11-44 on page 205).. You can eliminate a
shear wave error by adjusting the start position of the second back wall measurement.
Summary of Contents for EPOCH 6LT
Page 8: ...DMTA 10084 01EN Rev 2 November 2018 Table of Contents viii...
Page 10: ...DMTA 10084 01EN Rev 2 November 2018 List of Abbreviations x...
Page 16: ...DMTA 10084 01EN Rev 2 November 2018 Introduction 6...
Page 20: ...DMTA 10084 01EN Rev 2 November 2018 Chapter 1 10...
Page 26: ...DMTA 10084 01EN Rev 2 November 2018 Chapter 2 16...
Page 32: ...DMTA 10084 01EN Rev 2 November 2018 Chapter 3 22...
Page 68: ...DMTA 10084 01EN Rev 2 November 2018 Chapter 5 58 Figure 5 15 Diagnostic Test setup page...
Page 110: ...DMTA 10084 01EN Rev 2 November 2018 Chapter 8 100...
Page 154: ...DMTA 10084 01EN Rev 2 November 2018 Chapter 9 144...
Page 216: ...DMTA 10084 01EN Rev 2 November 2018 Chapter 11 206 Figure 11 45 Corrosion sidebar menu G2Start...
Page 220: ...DMTA 10084 01EN Rev 2 November 2018 Appendix 210...
Page 226: ...DMTA 10084 01EN Rev 2 November 2018 List of Tables 216...
Page 232: ...DMTA 10084 01EN Rev 2 November 2018 Index 222...
