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: 

Demonstrate knowledge of fans, fan measurements and performance 
SAQA US ID UNIT STANDARD TITLE
120322  Demonstrate knowledge of fans, fan measurements and performance 
ORIGINATOR
SGB Occupational Health and Safety 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 09 - Health Sciences and Social Services Preventive Health 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular-Fundamental  Level 4  NQF Level 04  5 
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 
Learners competent in this unit standard will be able to demonstrate knowledge of fans, fan measurements and performance, actual operating point, and to recommend appropriate remedial action. 

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
  • Communication at NQF Level 2
  • Mathematical Literacy at NQF Level 2 
    		•

    UNIT STANDARD RANGE 
    All the Specific Outcomes and Assessment Criteria are assessed in accordance with specified requirements and - where applicable - consequences to health and safety.

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

    Legal:
  • OHS Act and Regulations
  • Mine Health and Safety Act and Regulations
  • Guideline for mandatory Codes of Practice

    Site-specific:
  • Managerial instructions
  • Codes of Practice
  • Company Standards
  • Standard Task Procedures
  • Health Management Program
  • Risk Assessment Documentation
  • Working Guides
  • Manufacturers' specifications 
    		•

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Demonstrate knowledge of fan laws. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The units of measurement are explained. 

    ASSESSMENT CRITERION 2 
    The characteristics of fan performance curves are explained. 

    ASSESSMENT CRITERION 3 
    The features of a fan curve are explained. 

    ASSESSMENT CRITERION 4 
    The measurement of total, static and velocity pressures for various fan are explained. 

    ASSESSMENT CRITERION 5 
    The effects of changes in fan diameter, fan speed, operating density and changes to the fan's power requirements are explained. 

    SPECIFIC OUTCOME 2 
    Describe the specified requirements pertaining to a fan characteristic curve. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Fan characteristic curves are defined. 

    ASSESSMENT CRITERION 2 
    The fan performance is calculated and remedial actions recommendations are recommended when fan performance does not comply with specifications. 

    ASSESSMENT CRITERION 3 
    The importance of functional safety devices and requirements at fan installations are described. 

    ASSESSMENT CRITERION 4 
    The importance of fan performance test procedures are explained. 

    SPECIFIC OUTCOME 3 
    Demonstrate knowledge of fan performance calculations, curves and graph plotting. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The fan characteristic, input power and efficiency curves are drawn and compared with manufacturer's performance data. 

    ASSESSMENT CRITERION 2 
    The importance of establishing the performance of a fan is explained. 

    ASSESSMENT CRITERION 3 
    The system resistance curve is calculated and the actual operating point of the fan is determined. 

    ASSESSMENT CRITERION 4 
    The fan duty, corresponding input power and efficiency are determined. 

    SPECIFIC OUTCOME 4 
    Determine fan characteristic curve and operating point. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The air velocity is determined and recorded for each setting of the regulating device and the importance of determining the air velocity as prescribed is explained. 

    ASSESSMENT CRITERION 2 
    The volume flow rate for each required point on the fan characteristic curve is calculated and recorded by using measured data. 

    ASSESSMENT CRITERION 3 
    The measurement of fan differential pressure is explained and recorded for each setting of the regulating device. 

    ASSESSMENT CRITERION 4 
    The determination of fan electrical input data and the recording thereof for each setting of the regulating device is described. 

    ASSESSMENT CRITERION 5 
    The measurements and recording of psychrometric properties and fan speed are described. 

    ASSESSMENT CRITERION 6 
    The work is performed in a manner that fosters teamwork and avoids conflict. 


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

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    The following must be addressed:

    Types of fan:
  • Fan layouts
  • Components of fan
  • Blade arrangements
  • Direction of rotation
  • Application of fans

    Pressure-volume flow:
  • Rate curve
  • Efficiency curve
  • Input power curve
  • System resistance curve

    Stall zone and duty point 
    		•

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Solve problems related to the interpretation of pressure and flow rates and the determination of fan operating points. 

    UNIT STANDARD CCFO WORKING 
    Work effectively with others as a member of a team/group/organisation/community by accepting, interpreting and delegating instructions correctly, if and when required, in a context-appropriate manner. 

    UNIT STANDARD CCFO ORGANISING 
    Organise and manage themselves and their activities responsibly and effectively by meeting specified requirements, interpreting test results in specified formats, and recommending appropriate action where necessary. 

    UNIT STANDARD CCFO COLLECTING 
    Collect, organise and critically evaluate information to correct for conditions, environmental factors, and limitations that can influence readings, interpret information obtained, and recommend appropriate remedial action. 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively using visual, mathematics and language skills in the modes of oral and written presentations to record and report test results. 

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically (showing responsibility towards the environment and health of others) to select the appropriate methods and instruments for testing for fan pressures and volume flow rates. 

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems by recommending appropriate actions based on the evaluation of test results and reporting results to relevant designated persons, confirming that a specific observation, inference, action or decision can have an interrelated 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 
    N/A 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  79806   National Certificate: Occupational Hygiene and Safety  Level 3  NQF Level 03  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.
     
    1. MODIKWA MINING PERSONNEL SERVICES PTY L TD 
    2. Nokaneng Environmental Management Consulting 


    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.