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Elements and Performance Criteria

1. Prepare HVAC/R system to determine noise and vibration encountered in application
   • Work health and safety (WHS)/occupational health and safety (OHS) requirements and workplace procedures for a given work area are obtained and applied
2. WHS/OHS risk control work preparation measures and workplace procedures are followed
3. Nature of the problem is obtained from documentation or from work supervisor to determine the scope of work to be undertaken
4. Advice is sought from the work supervisor to ensure the work is coordinated effectively with others
5. Sources of equipment and products required for HVAC/R work are established in accordance with workplace procedures
6. Tools, equipment and testing devices needed to carry out HVAC/R work are obtained and checked for correct operation and safety
7. Determine HVAC/R application noise and vibration measurements
   • WHS/OHS risk control work measures and workplace procedures are followed
8. Need to test or measure active HVAC/R systems is determined in accordance with WHS/OHS requirements and conducted in accordance with workplace safety procedures
9. HVAC/R systems are checked and isolated in accordance with WHS/OHS requirements and workplace procedures
10. Relevant technique or process methods are used to determine noise and vibration measurement encountered in HVAC/R application
11. Unexpected situations are dealt with safely in accordance with workplace procedures and with the approval of authorised person/s in a manner that minimises risk to personnel and equipment
12. Measurements are taken without damage to HVAC/R apparatus, circuits, the surrounding environment or services using sustainable energy practices with minimum waste and re-work
13. Document HVAC/R application noise and vibration measurements and calculations
    • WHS/OHS work completion risk control measures and workplace procedures are followed
14. Worksite is cleaned and made safe in accordance with workplace procedures
15. Justification for alternative approach to determine noise and vibrationmeasurements is documented and appropriate person/s notified in accordance with workplace procedures
16. Work completion is documented and appropriate person/s notified in accordance with workplace procedures

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment. Non-essential conditions may be found in the UEE Electrotechnology Training Package Companion Volume Implementation Guide.
Providing sound, noise and vibration measurements must include at least the following:	two HVAC/R applications

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Performance Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions on at least one occasion and include:

identifying the dynamic characteristics of systems/materials and the effects due to different operating parameters using established measurement methods taking relevant measurements accurately interpreting measured values appropriately providing correct interpretation of data taken from measurements and calculations dealing with unplanned events applying problem solving procedures including using appropriate theorems applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements and workplace procedures and practices, including using risk control measures applying sustainable energy principles and practices determining noise and vibration encountered in heating, ventilation and air conditioning/refrigeration (HVAC/R) applications.

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Knowledge Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions and include knowledge of:

noise and vibration fundamentals, safe working practices and relevant standards, codes and regulations, including: fundamentals of sound: properties of sound: wavelength, amplitude, frequency, period, velocity, sound (intensity, pressure and power) and decibels sound pressure level sound power level addition of sound levels loudness and weighting networks sound spectrum and octave bands single value representation of sound spectrum noise rating (NR) curves sound meters fundamentals of vibration: terminology: spring-mass system, spring in series and/or parallel, stiffness, effective stiffness, viscous frictional coefficient, mass, period, frequency (angular, natural, damped and forced), amplitude, static deflection, damping ratio, damping factor and frequency ratio simple harmonic motion (SHM) damped vibration forced vibration maximum amplitude and resonance transmissibility and isolation efficiency vibration isolators relevant HVAC/R manufacturer specifications relevant job safety assessments or risk mitigation processes relevant techniques, processes or measurement methods to obtain sound, noise and vibration data, including problem-solving procedures and appropriate theorems relevant WHS/OHS legislated requirements relevant workplace documentation relevant workplace policies and procedures.

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