SAQA All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.
SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Overhaul a centrifuge 
SAQA US ID UNIT STANDARD TITLE
253393  Overhaul a centrifuge 
ORIGINATOR
SGB Generic Manufacturing, Engineering, Technology 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 06 - Manufacturing, Engineering and Technology Fabrication and Extraction 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 3  NQF Level 03  7 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Reregistered" 		 2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
This unit standard will be useful to people who are required to overhaul a centrifuge.

People credited with this unit standard are able to:
  • Explain the factors critical to overhauling a centrifuge.
  • Prepare to overhaul the centrifuge.
  • Overhaul the centrifug.
  • Test the centrifuge and prepare for operation and/or production. 
    		•

    LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    The credit calculation is based on the assumption that learners are already competent in terms of the following outcomes or areas of learning when starting to learn towards this unit standard:
  • Lift and move loads.
  • Use hand tools.
  • Use hand held power tools.
  • Use relevant measuring instruments.
  • Use oxy-acetylene equipment.
  • Use of multiplier torque wrench.
  • Lubricate mechanical equipment.
  • Replace bearings.
  • Replace V-Belts and Pulleys.
  • Use non destructive testing (NDT) equipment.
  • Use ultrasonic testing equipment.
  • Replace mechanical seals. 
    		•

    UNIT STANDARD RANGE 
  • Overhauling a Centrifuge can include any type used in the mining and minerals environment. The Centrifuge could be overhauled on site or in a workshop.
  • Specific range statements are provided in the body of the unit standard where they apply to particular specific outcomes or assessment criteria. 
    		•

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Explain the factors critical to overhauling a centrifuge. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The explanation of the principle of operation and function of a centrifuge is in accordance with specified requirements. 

    ASSESSMENT CRITERION 2 
    The explanation of the importance of overhauling a centrifuge to achieve healthy, safe production requirements is in accordance with specified requirements. 
    ASSESSMENT CRITERION RANGE 
    Explanation of the importance must include:
  • Injury to persons.
  • Damage to equipment.
  • Loss of production time through breakdowns.
  • Increased costs.
     
    		•

    ASSESSMENT CRITERION 3 
    The explanation lists the possible critical workplace hazards that may be encountered while overhauling a centrifuge in a particular context. The explanation also describes the risks associated with and the factors contributing to each workplace hazard. 

    ASSESSMENT CRITERION 4 
    The explanation lists the possible critical work related hazards that may be encountered while overhauling a centrifuge in a particular context. The explanation also describes the risks associated with and the factors contributing to each work-related hazard. 

    SPECIFIC OUTCOME 2 
    Prepare to overhaul the centrifuge. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Permission is obtained in accordance with specified requirements. 

    ASSESSMENT CRITERION 2 
    The required personal protective equipment is selected, examined and used in a way that is consistent with its purpose, design and specified requirements. Personal protective equipment is used to ensure the safety of persons and equipment. 

    ASSESSMENT CRITERION 3 
    Tools, material and equipment required are selected, examined and transported in accordance with specified requirements. 

    ASSESSMENT CRITERION 4 
    The workplace is examined in accordance with specified requirements. Workplace hazards are dealt with in accordance with specified requirements. 

    ASSESSMENT CRITERION 5 
    The centrifuge is made safe for overhauling purposes in accordance with specified requirements and current accepted best practice. 
    ASSESSMENT CRITERION RANGE 
    Making safe the centrifuge must include:
  • Identification.
  • Applying lock out procedures where applicable.
  • Positioning and securing where applicable.
     
    		•

    ASSESSMENT CRITERION 6 
    The consequences for health, safety and production of not preparing to overhaul the centrifuge in line with specified requirements, and current legislation are explained. 
    ASSESSMENT CRITERION RANGE 
    Consequences must include those for:
  • Permission/Safe work permit.
  • Personal protective equipment.
  • Tools, material and equipment.
  • Workplace examination.
  • Workplace hazards.
  • Making safe of the centrifuge.
     
    		•

    SPECIFIC OUTCOME 3 
    Overhaul the centrifuge. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The required personal protective equipment is used in a way that is consistent with its purpose, design and specified requirements. Personal protective equipment is used to ensure the safety of persons and equipment. 

    ASSESSMENT CRITERION 2 
    Work related hazards are dealt with in accordance with specified requirements. 

    ASSESSMENT CRITERION 3 
    The centrifuge is dismantled in line with specified requirements for sequence, and is consistent with accepted best practice. 

    ASSESSMENT CRITERION 4 
    The components are inspected, defects rectified and replacement components are selected in accordance with specified requirements. 

    ASSESSMENT CRITERION 5 
    The centrifuge is assembled in line with specified requirements for sequence, lubrication, tolerances and current accepted best practice. 

    ASSESSMENT CRITERION 6 
    Interpersonal interaction is positive, consistent with specified requirements, promotes effective teamwork, and avoids dysfunctional conflict. 

    ASSESSMENT CRITERION 7 
    The tools and equipment are used in accordance with manufacturers' design and without injury to self and others. 

    ASSESSMENT CRITERION 8 
    The consequences for health, safety and production of not overhauling the centrifuge in line with specified requirements, and current legislation are explained. 
    ASSESSMENT CRITERION RANGE 
    Consequences must include those for:
  • Personal protective equipment.
  • Work related hazards and associated risks.
  • Dismantling the centrifuge.
  • Inspecting the components, rectifying defects and selecting replacement components.
  • Assembling the centrifuge.
  • Interpersonal interaction.
  • Use of tools and equipment.
     
    		•

    SPECIFIC OUTCOME 4 
    Test the centrifuge and prepare for operation and/or production. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The centrifuge is prepared for testing purposes in accordance with specified requirements. 

    ASSESSMENT CRITERION 2 
    The centrifuge is tested to determine if it is functioning in accordance with specified requirements. 

    ASSESSMENT CRITERION 3 
    Tools, material and equipment selected are dealt with in accordance with specified requirements. 

    ASSESSMENT CRITERION 4 
    The workplace is cleaned and free from hazards in accordance with specified requirements and housekeeping practices. 

    ASSESSMENT CRITERION 5 
    The report on work performed complies with specified requirements for format, content, accuracy and distribution. The report is delivered within the agreed time. 

    ASSESSMENT CRITERION 6 
    The consequences for health, safety and production of not testing the centrifuge in line with specified requirements, and current legislation are explained. 
    ASSESSMENT CRITERION RANGE 
    Consequences must include those for:
  • Testing preparation.
  • Testing.
  • Tools, material and equipment.
  • Housekeeping.
  • Reporting.
     
    		•


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • Anyone assessing a learner against this unit standard must be registered as an assessor with the relevant ETQA.
  • Any institution offering learning that will enable achievement of this unit standard must be accredited as a provider through the relevant ETQA by SAQA.
  • Moderation of assessment will be overseen by the relevant ETQA according to the moderation guidelines and the agreed ETQA procedures. 
    		•

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    Essential embedded knowledge will be assessed through assessment of the specific outcomes in terms of the stipulated assessment criteria. Candidates are unlikely to achieve all the specific outcomes, to the standards described in the assessment criteria, without knowledge of the listed embedded knowledge. This means that for the most part, the possession or lack of the knowledge can be directly inferred from the quality of the candidate's performance. Where direct assessment of knowledge is required, assessment criteria have been included in the body of the unit standard.

    The following embedded knowledge is addressed in an integrated way in the unit standard:

    Learners can:
  • Understand and explain relevant health and safety requirements.
  • Apply report writing principles.
  • Understand and adhere to legal and site-specific requirements. 
    		•

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems and make decisions using critical and creative thinking.

    Note: The ability of the candidate to identify sub-standard and hazardous conditions, assess and take appropriate action. 

    UNIT STANDARD CCFO WORKING 
    Work effectively with others as members of a team, group, organisation or community.

    Note: The ability and willingness of the candidate to accept and interpret work instructions correctly. 

    UNIT STANDARD CCFO ORGANISING 
    Organise and manage themselves and their activities responsibly and effectively.

    Note: The ability of the candidate to indicate what methods, tools and personal protective equipment is required and communicate to fellow workers his/her intentions and assistance required. 

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information.

    Note: The ability of the candidate to reconcile the information from visual and physical examinations and constantly evaluate the changing situation. 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively, using visual, mathematical and/or language skills in the modes of oral and/or written presentations.

    Note: The appropriate communication with the relevant personnel with regard to the reporting of hazards and sub-standard conditions will indicate his/her proficiency in effective communication. 

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically showing responsibility towards the environment and health of others.

    Note: The use of science and technology is not relevant for this unit standard. 

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems by recognising that problem-solving contexts do not exist in isolation.

    Note: The ability of the candidate to identify and refer anomalous behaviour to a specialist confirms understanding that a specific observation, inference, action or decision can have a devastating effect. 

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    Terminology:

    Specified Requirements:

    Specified requirements include legal and site specific requirements and are contained in one or more of the following documents:

    Legal:
  • Relevant Legislation: e.g. Mine Health & Safety Act, 1996 (Act no 29/1996), Minerals Act and Regulations, 1991 (Act no 50/1991), and Occupational Health and Safety Act (Act 85/1993).
  • Mandatory Codes of Practice.
  • SANS and other relevant Standards.
  • Chief Inspector of Mines' Directives and instructions.

    Site Specific:
  • Hazard Identification and Risk Assessment (HIRA).
  • Occupational Health and Safety Risk Management Programme.
  • Managerial Instructions.
  • Mine Standard Procedures.
  • List of Recorded OH&S Risks.
  • Working Guide.
  • Equipment and Materials Specifications.

    Notes to Assessors:

    Assessors should keep the following principles in mind when designing and conducting assessments against this unit standard:
  • Focus the assessment activities on gathering evidence in terms of the main outcome expressed in the title to ensure assessment is integrated rather than fragmented. Remember we want to declare the person competent in terms of the title. Where assessment at title level is unmanageable, then focus assessment around each specific outcome, or groups of specific outcomes.
  • Make sure evidence is gathered across the entire range, wherever it applies. Assessment activities should be as close to the real performance as possible, and where simulations or role-plays are used, there should be supporting evidence to show the candidate is able to perform in the real situation.
  • Do not focus the assessment activities on each assessment criterion. Rather make sure the assessment activities focus on outcomes and are sufficient to enable evidence to be gathered around all the assessment criteria.
  • The assessment criteria provide the specifications against which assessment judgements should be made. In most cases, knowledge can be inferred from the quality of the performances, but in other cases, knowledge and understanding will have to be tested through questioning techniques. Where this is required, there will be assessment criteria to specify the standard required.
  • The task of the assessor is to gather sufficient evidence, of the prescribed type and quality, as specified in this unit standard, that the candidate can achieve the outcomes again and again and again. This means assessors will have to judge how many repeat performances are required before they believe the performance is reproducible.
  • All assessments should be conducted in line with the following well documented principles of assessment: appropriateness, fairness, manageability, integration into work or learning, validity, direct, authentic, sufficient, systematic, open and consistent.

    Unit Standard Justification:

    Level:

    Attribute; Level; Justification:
  • Skills; Level 3; The skills required have a significant variety and extend beyond the simple range.
  • Procedure; Level 3; In this case the procedures could differ and the candidate has to make the correct selection of procedure to apply. The choice however is limited.
  • Context; Level 2; Contexts are repeatedly applicable and known.
  • Knowledge; Level 4; The theoretical knowledge required is extended to theoretical concepts.
  • Information processing; Level 3; Information is available but interpretation as opposed to basic processing thereof is required.
  • Problem solving; Level 3; A range of known responses to familiar problems, base on limited discretion and judgment.
  • Orientation of activity; Level 3; Decisions are taken but require supervision.
  • Application of responsibility; Level 3; Output is quality checked randomly.
  • Orientation of scope of responsibility; Level 3; Responsible for completion (quantity) and function (quality).

    Average Level: = 27/9 = 3.
    Actual Level Assigned: = 3.

    Credits:

    Total hours required by the learner to achieve the required outcome:

    Activity; Hours:
  • Training Centre; 20 Hours.
  • On the job training; 50 Hours.
  • Other (specify); 0 Hours.

    Total = 70 Hours.

    Credits Achieved: = 70/10 = 7.00.
    Credits Assigned: = 7. 
    		•

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Elective  59709   Further Education and Training Certificate: Mechanical Engineering: Fitting  Level 4  NQF Level 04  Passed the End Date -
    Status was "Reregistered"     		 2023-06-30  As per Learning Programmes recorded against this Qual 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    NONE 


    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.