What is ACFM Testing?
Alternating Current Field Measurement or ACFM is an electromagnetic inspection technique that introduces an alternating current into the surface of the component to detect surface-breaking cracks.
The presence of a crack disturbs the electromagnetic field and the return signal is instantaneously converted by advanced mathematical techniques, so that the operator is alerted to the presence of a defect. Immediate defect sizing and recording is a major benefit compared to alternative NDT methods.
What are the responsibilities of a individual who is certified to ACFM Level 1?
An individual certified to ACFM Level 1 has to demonstrate competence to carry out NDT according to written instructions and under the supervision of Level 2 or Level 3 personnel. Within the scope of the competence defined on the certificate, ACFM Level 1 personnel may be authorised by the employer to perform the following in accordance with NDT instructions:
- Set up ACFM testing equipment
- Perform the ACFM inspection tests
- Record and classify the results of the tests according to written criteria
- Report the results
Level 1 certified personnel shall neither be responsible for the choice of test method or technique to be used, nor for the interpretation of test results.