GE Everest XLG3 VideoProbe, Operating Manual

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User Manual Chapter 7 Measuring Features and Defects 95
Indication of Non-Measurable Area
When working with a 3D phase measurement image, certain parts of the image may not
be measurable. These parts may be too far away, or be too dark, or obscured by light
reflections if the surface is highly reflective. The 3D Phase Measurement system will
display a red colored zone in those areas. To enhance measurement accuracy, the system
will not allow an operator to place cursors in a red colored area.
The 3D Phase Measurement system will display a yellow colored zone in those areas
where accuracy is reduced. Cursor placement in a yellow colored area should be avoided
if possible.
Area The surface area contained
within multiple cursors placed
around a feature or defect. Place three or more cursors (up
to 24) around the edge of the
area you want to measure.
When finished, press
twice. The area closes.
Multi-
segment
line The length of a nonlinear
feature or defect. Place two or more
measurement cursors (up to
24) to create line segments
along the feature.
When finished, press
twice. The line is finalized.
Depth Profile A profile of the perpendicular
distances from an area of
interest to a specified surface. Place two measurement
cursors on a flat surface
adjacent to the area of interest
to create a reference plane
When finished, press and
hold
to display the depth
profile view.
Type (cont.) Example (cont.) Description (cont.) Cursor Placement (cont.)