For a portable arm device, follow this procedure to measure a point on a top surface. Use the probe shaft for probe compensation:
Place the probe on the top surface with the probe shaft straight up from the point location (B), perpendicular to the surface. The point is compensated in the direction (A) of the probe shaft.
Correct Position (left) and Incorrect Position (right)
On the arm, press the Hit button.
On the arm, press the Done button. Notice that the measured point has been added to the Edit window.
With the point highlighted, press F9 to open the Measured Point dialog box.
Measured Point example that shows hit vector pointing up
Notice that the IJK values in the example generally point up (0,0,1). These values should generally coincide with the surface vector at the point's location.
When you probe single points, make sure that you hold the probe normal (perpendicular) to the surface.