This unit applies to inspection, interpretation, classification and reporting of results of eddy current testing on fabrications, structures and components across a wide range of industries to Level 2 (AS 3669 and AS 3998) or equivalent. The work can relate to scheduled and unscheduled maintenance activities using general tools and specific testing eddy current testing tools and equipment as specified in maintenance documentation, testing procedures or operator instructions.

Actual and potential defects are considered, together with ongoing abnormalities in fabrications, components, structures and/or aircraft components. Eddy current tests are performed on critical component or structural zones, and may require re-assessment of competency at regular intervals in accordance with Australian standards and/or other relevant standards. All testing must be completed with particular attention to personal safety and OH&S regulations. Certification against Australian standards may be achieved where assessment in this unit of competency is carried out in conjunction with an examining authority as described in ISO 9712.

Materials and chemicals which are subject to codes and regulations - for example, chemicals, explosives, solvents, dangerous materials, acids, or noxious waste products - are subject to safe work habits and must be stored and used in accordance with safe work practices.

Where power tools are required, Unit MEM18002B (Use power tools/hand held operations) should also be selected.

Where tests require the interpretation of drawings, Unit MEM09002B (Interpret technical drawings) should also be selected.

Band:

This unit has dual status and is to be regarded as both a Specialisation band A unit and Specialisation band B unit for progression to C5 (AQF level V).

Unit Weight: 6

Path 1

MEM18001C

Use hand tools

MEM24012C

Apply metallurgy principles

ELEMENT

PERFORMANCE CRITERIA

1. Prepare inspection areas for eddy current testing

1.1. Inspection areas are identified, cleaned and prepared for testing using appropriate procedures and materials.

1.2. Preparation processes are carried out in accordance with the relevant procedures, statutory and OH&S requirements.

1.3. Inspection areas are visually assessed and obvious discontinuities are identified.

2. Perform eddy current testing

2.1. The most appropriate eddy current test for the material/application is selected.

2.2. Test equipment is selected and prepared in accordance with standards and/or procedures.

2.3. Eddy current test is carried out in accordance with relevant standards, specifications and OH&S requirements.

2.4. Eddy current test equipment is checked for defects, and maintained and stored in accordance with procedures, OH&S requirements and manufacturer instructions.

3. Interpret and report the results of eddy current tests

3.1. Indications are assessed and defects are detected and classified in accordance with national and international codes and standards.

3.2. Defects are confirmed in accordance with enterprise procedures and industry practices.

3.3. Test results are reported in accordance with enterprise procedures, accepted industry practices and customer service requirements.

Required skills

Look for evidence that confirms skills in:

interpreting and following procedures

identifying inspection areas

identifying discontinuities and defects

selecting appropriate testing techniques and procedures

reading, interpreting and applying relative testing standards

reading, interpreting and applying relative conformance standards

using calculations relating to eddy current testing

assessing risk

entering routine and familiar information onto proformas and standard workplace forms

Required knowledge

Look for evidence that confirms knowledge of:

cleaning and preparation processes

procedures and OH&S requirements in relation to the preparation process

established assessment procedures and techniques

types of discontinuities and their consequences

procedure for carrying out eddy current testing

tools, equipment, techniques and system verification checks necessary to carry out eddy current testing

basic principles of electricity, magnetism, electromagnetism and eddy current testing:

Reactance - field made by eddy current

Biot and Savant law - Definition, Practical (right hand) rules

Amperes law - Definition, Applications (toroid, infinite coil, flat coil)

Lenz law - Definition, Auto-induction factor, Mutual induction factor, Coupling factor

induced currents - short circuit coil, metallic mass, skin effect, reactance

cylindrical bars

theory of eddy currents

tubes

geometric defect characterisation

multiple defects

characteristics of eddy current probes

eddy current equipment:

transmission

reception

data presentation

equipment controls

types of equipment:

physical properties of materials

electrical conductivity

magnetic permeability

applications of eddy curry testing

influence of various parameters on eddy current measurement

defect position and orientation

compensation

structure and geometry of test part

coupling influence

relative speed

limitations of eddy current testing

hazards and safety precautions associated with eddy current testing

basic maintenance and storage procedures for testing equipment

common basic defects

methods/procedures for reporting test results

any applicable industry standards, national/Australian standards, NOHSC guides, State/Territory regulatory codes of practice/standards

use and application of personal protective equipment

safe work practices and procedures

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.

Overview of assessment

A person who demonstrates competency in this unit must be able to perform eddy current testing. Competency in this unit cannot be claimed until all prerequisites have been satisfied.

Critical aspects for assessment and evidence required to demonstrate competency in this unit

Assessors must be satisfied that the candidate can competently and consistently perform all elements of the unit as specified by the criteria, including required knowledge, and be capable of applying the competency in new and different situations and contexts.

Context of and specific resources for assessment

This unit may be assessed on the job, off the job or a combination of both on and off the job. Where assessment occurs off the job, that is the candidate is not in productive work, then an appropriate simulation must be used where the range of conditions reflects realistic workplace situations. The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team. The assessment environment should not disadvantage the candidate.

This unit could be assessed in conjunction with any other units addressing the safety, quality, communication, materials handling, recording and reporting associated with performing eddy current testing in a range of industrial applications, or other units requiring the exercise of the skills and knowledge covered by this unit.

Method of assessment

Assessors should gather a range of evidence that is valid, sufficient, current and authentic. Evidence can be gathered through a variety of ways including direct observation, supervisor's reports, project work, samples and questioning. Questioning techniques should not require language, literacy and numeracy skills beyond those required in this unit of competency. The candidate must have access to all tools, equipment, materials and documentation required. The candidate must be permitted to refer to any relevant workplace procedures, product and manufacturing specifications, codes, standards, manuals and reference materials.

Guidance information for assessment

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.

Preparation processes

Surface cleaning and drying

Obvious discontinuities

Observed changes in material homogeneity

Defects

Corrosion, metal fatigue, deformation in non-ferrous/ferrous alloys steels, fatigue cracks, stress corrosion cracking, heat damage, metal properties sorting, manufacturing defects, coating thickness measurement etc.

Unit sector

Non-destructive testing

This unit contains employability skills.