Can AT's count primary-secondary turns?
it is very difficult to provide exact turns counting on an unknown part without comparing the parts to a known transformer. The TR test for the AT3600 and AT is very sensitive to the turn count, a missing turn on the primary or secondary is usually detected in this test.
To check TR sensitivity a “good” and “bad” transformer is tested, the “bad” transformer having a turn removed from primary and/or secondary. The good and bad transformers are then tested with a TR test to confirm that a missing turn has been detected.
TR tests may be either by comparing primary/secondary Inductance or Voltage. TR by inductance is recommended where the magnetic coupling between primary and secondary is poor.
It is recommended that the winding with the highest number of turns is used for the energized winding.
It is certainly possible to count turns using AT's as long as the fixture is carefully designed and appropriate test conditions are chosen.