10-003591-01EN [Q7780031], Rev. 4, January 2020
Inspection
41
Figure 4-4 Probe element marks on the wedge
3.
On the OmniScan, press the Play key (
) to set the encoder position to zero.
4.
Make your scan motion, and observe the instrument display to make sure that all
data has been captured.
5.
After completing the first scan, press the indexing button.
6.
Slide the scanner over, align it on the next scan zero position, and align the
element 1 mark on the wedge with the element 64 mark on the pipe.
7.
Make your next mark at element 64, and then press the indexing button again and
wait at least one second after having pressed the button before moving (to avoid
the risk of overwriting your data).
8.
Repeat the above steps 4–7 until you complete all necessary inspection scans.
4.3
Correction Factors
The probe’s concave shape, its distance away from the inspection surface, and the
number of elements in its beam affect the effective probe beam width and observed
defect size in the following ways:
•
The effective width covered by the probe beam on the inspection surface is
smaller than the width of the probe’s active aperture.
•
The length of a defect (along the index axis) appears to be longer than it is in
reality.
•
As the inspection surface radius (pipe diameter) decreases, the above effects
increase in magnitude.
To compensate for these effects, correction factors need to be applied.
1
64
Summary of Contents for FlexoFORM
Page 6: ...Table of Contents vi 10 003591 01EN Q7780031 Rev 4 January 2020 ...
Page 8: ...10 003591 01EN Q7780031 Rev 4 January 2020 List of Abbreviations viii ...
Page 12: ...10 003591 01EN Q7780031 Rev 4 January 2020 Labels and Symbols 4 ...
Page 24: ...10 003591 01EN Q7780031 Rev 4 January 2020 Important Information Please Read Before Use 16 ...
Page 26: ...10 003591 01EN Q7780031 Rev 4 January 2020 Introduction 18 ...
Page 30: ...10 003591 01EN Q7780031 Rev 4 January 2020 Chapter 1 22 ...
Page 44: ...10 003591 01EN Q7780031 Rev 4 January 2020 Chapter 3 36 ...
Page 82: ...10 003591 01EN Q7780031 Rev 4 January 2020 Chapter 7 74 ...
Page 86: ...10 003591 01EN Q7780031 Rev 4 January 2020 Appendix B 78 ...
Page 90: ...10 003591 01EN Q7780031 Rev 4 January 2020 List of Tables 82 ...
Page 94: ...10 003591 01EN Q7780031 Rev 4 January 2020 Index 86 ...
