18.104.22.168 NDI Equipment Settings.
Make the following initial settings on the Eddy Current Inspection Unit, NORTEC-19eII
- 200 KHz
Refer to Eddy Current Method, paragraph 1.4.11. Set up on test block as follows:
Null probe on test block.
Adjust phase as required to obtain horizontal lift-off.
Move probe over all three notches in test block. Adjust gain to obtain a three block vertical signal when
probe is passed over 0.040-inch notch in test block. (See the standard instrument display shown in Figure 1-7.)
22.214.171.124 Inspection Procedure. Refer to Eddy Current Method, paragraph 1.4.11 and Figure 3-13.
The main transmission contains a higher conductivity magnesium which will require the use of the
aluminum test block when performing inspections in these areas, refer to paragraph 126.96.36.199, Sorting
Metal Using Eddy Current, to determine what test block is best suited for this inspection.
Place probe on a good area in the inspection location and null. Adjust phase as required to obtain horizontal
Inspect the part.
Any signal similar to the notches in the test block is cause for rejection.
Either probe identified in paragraph 188.8.131.52 may be used depending primarily on the ease
of accessibility and user friendliness. If the probes are changed, steps 184.108.40.206 b. (1), (2),
and (3) shall be repeated each time a change is made.
220.127.116.11 Marking and Recording of Inspection Results. Mark and record the inspection results as required by paragraph