Effect of Test Parameters on an eddy current test. скачать в хорошем качестве

Effect of Test Parameters on an eddy current test.

This video demonstrates the effects of changing essential variables (or test parameters) on an eddy current testing system. These test parameters can include but are not limited to: test frequency, coil type, operating mode, calibration standard, material type and dimensions, material permeability, coil drive voltage, gain settings, phase rotation settings, cable type and length, filters used, magnetic coupling efficiency and so on. If you want to have a repeatable test, you must use the same essential variables from test to test so a reasonable comparison can be made. If essential parameters are changed, "signal change" may be falsely attributed to flaw growth, when in fact perhaps only the test setup changed.