100
Chapter 7 Measuring Features and Defects
GE Inspection Technologies XLG3 VideoProbe System
To Take a Stereo Measurement
1.
Attach the stereo tip securely, and verify it.
See
“Verifying Measurement Tips”
on page 112.
2.
Position the probe tip for maximum accuracy.
See
“To Position the Probe Tip for a Stereo Measurement Image”
on page 98.
3.
Freeze the image.
4.
Select the measurement type and tip.
Press .
Select
Measure
>
Stereo
>
measurement type
>
tip.
5.
Place the cursors in the left half-screen, as described on the screen.
Measurement accuracy depends on all cursors being positioned accurately. For best
accuracy in cursor placement, press
to activate the zoom window for a close-up
view of the image around the active cursor.
To learn how to place cursors for specific measurement types, see
“Types of Stereo
Measurement”
on page 102.
As you move each cursor, the matching cursor in the right half-screen moves
accordingly.
6.
Inspect each matching cursor as soon as it appears.
Generally, you get the best results by leaving the matching cursors exactly where the
system places them. However, under certain circumstances, such as when a
repeating pattern exists, you may need to help the system find the correct match.
For details, see
“About the Matching Cursors”
on page 97.
7.
(Optional) Reposition the left-side cursors and the measurement result. Reinspect the
matching cursors.
8.
(Optional) Verify your measurement accuracy.
Move each left-side cursor a few pixels. If the matching cursors move identically, and if
the results change only a little, you have probably achieved accurate results. But if a
matching cursor’s movement is erratic, or if the results change significantly, your
results are unreliable. Capture a fresh image, following the guidelines under
“To
Position the Probe Tip for a Stereo Measurement Image”
on page 98.
Note
This step is especially useful if you have to use a low accuracy index (less
than 5) or low match strength (less than 3). For example, you might have to
use a low accuracy index if you are measuring a large object or if you have
limited access and cannot bring the tip close to the target. You might have to
use low match strength if the surface has few details.
Summary of Contents for Everest XLG3 VideoProbe
Page 4: ...iv GE Inspection Technologies XLG3 VideoProbe System ...
Page 8: ...viii GE Inspection Technologies XLG3 VideoProbe System ...
Page 34: ...26 Chapter 2 Safe Powering and Grounding GE Inspection Technologies XLG3 VideoProbe System ...
Page 54: ...46 Chapter 4 Setting Up the Software GE Inspection Technologies XLG3 VideoProbe System ...
Page 134: ...126 Chapter 8 Maintenance GE Inspection Technologies XLG3 VideoProbe System ...
Page 138: ...130 Chapter 9 Troubleshooting GE Inspection Technologies XLG3 VideoProbe System ...
Page 142: ...134 Appendix A Specifications GE Inspection Technologies XLG3 VideoProbe System ...
Page 146: ...138 Appendix C Chemical Compatibility GE Inspection Technologies XLG3 VideoProbe System ...
Page 148: ...140 Appendix D Warranty GE Inspection Technologies XLG3 VideoProbe System ...
Page 166: ...158 Index GE Inspection Technologies XLG3 VideoProbe System ...
