The position of the probe, relative to a universal coordinate system, must be specified. In our case, it is -12mm (the flaw will be located at 0mm). Enter this value into the second edit-box control, labeled "Z position," which is found in the "Probe Position" group box.
Scanning the probe over the flaw is achieved by "ranging" over the probe's position. In order to activate ranging, we press the speed-button to the right of the Z-position edit-box, which will result in a red indication, and reveal the "Range" form, shown below.
Select the "Enable Ranging" check box. You may now specify the number of Z-positions by entering the value of 49 into the "Number of Range Points" spin-edit. In order to specify these points, enter 0.5 into the "Increment" edit-box, and then click the "Linear" button. Note that this immediately updates the "Current Range Values" list. You are now set to scan the probe from -12mm to +12mm in 0.5mm steps.
Finally, we must specify the bobbin transmit coil. Return to the Edit Probe form, and choose the "Circular Transmit Coil," which corresponds to the top left speed button in the "Add" group of the "Probe Components" box. The parameters of this coil can be specified by pressing "Edit," which reveals the "Edit Coil" form. Enter 64 into the "Turns" box, and leave the "Coil Position in Probe" values set to 0 for "Azimuth," "Z position," and "R position." This implies that the center of the coil coincides with the probe origin. Remember that we have previously placed the probe origin at -12 mm in the global coordinate system. We must also orient our coil into the "bobbin" orientation. Enter 90 degrees for both Phi and Theta in the "Probe Orientation" group box, which rotates the coil relative to the probe coordinate axes, and leaves it coaxial with the cylindrical workpiece Z axis. Finally, we set "Coil Shape Parameters," namely "Inner Radius," "Outer Radius," and "Height," to be the same as those given in the original problem configuration.
Our completed probe form should look like the figure below.
