GE Inspection Technologies LP 7260H Manual De Usuario

3D Phase Measurement optical tips and probe capture a three-dimensional surface scan of the object. Measurements are 

then made directly on the surface and displayed on the image. Preliminary steps of matching cursors or marking shadow 

lines are not necessary.

The 3D Phase Measurement system will display a number on-screen after a measurement is complete. While taking the 

measurement, an MTD number will appear (see the upper left corner of the figure to the right). MTD stands for Maximum 

Target Distance and is the distance from the 3D Phase Measurement tip to the surface at the point of the active cursor. 

Unlike stereo measurements, 3D Phase Measurements do not use Accuracy Index.

As with other measurement types, Phase Measurement accuracy improves as tip-to-target distance is reduced. The range 

finder bar icon can be used to gauge the suitability of the current tip-to-target distance for a given measurement. When the 

surface is too far for measurement, a single bar is shown, and measurement should not be attempted. As the tip is moved 

closer to the surface, 

more bars are illuminated. Large length measurements may be performed with 

few bars illuminated, while still achieving good accuracy. In general, the best 

accuracy is achieved by getting as close to the surface as possible.

Accuracy is generally best when viewing a surface from approximately a 45° 

angle, especially on surfaces that are shiny or have a speckled appearance.

When measuring surfaces with steps or long, deep features, a side view tip will 

give better results if the feature or step is horizontal (as shown at right). A front 

view tip will give better results if the feature or step is vertical. This is due to the 

LED orientations in the tips.

 – Attach either a forward view or side view 3D Phase Measurement 

optical tip to the probe. Each measurement tip must be factory calibrated to 

a particular probe, and may be calibrated to more than one probe. To ensure 

measurement accuracy, verify the tip’s accuracy each time it is installed. Refer 

to 

for verification procedures.

– Verify that the Visual iQ system has automatically identified the 3DPM 

optical tip. The range finder appears near the upper right corner of the live image. 

 – Initiate the Image Capture sequence as described in the following 

section.