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: 

Demonstrate knowledge of psychrometric charts and perform calculations 
SAQA US ID UNIT STANDARD TITLE
120328  Demonstrate knowledge of psychrometric charts and perform calculations 
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 3  NQF Level 03 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
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 found competent in this unit standard will be able to demonstrate knowledge of psychrometry and the use of psychrometric and density charts. Learners will be able to perform basic psychrometry calculations. 

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

  • UNIT STANDARD RANGE 
    All explanations and demonstrations are according to specified requirements.

    Specified requirements include relevant 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 and understanding of psychrometric fundamentals. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The need for establishing and maintaining thermal conditions that will ensure a safe, healthy and productive environment is correctly explained. 

    ASSESSMENT CRITERION 2 
    The units of psychrometry are correctly explained. 

    ASSESSMENT CRITERION 3 
    The gas laws pertaining to thermal conditions are defined. 

    ASSESSMENT CRITERION 4 
    The physical properties of an air-water vapour mixture are defined. 

    ASSESSMENT CRITERION 5 
    Heat transfer processes are explained. 

    SPECIFIC OUTCOME 2 
    Demonstrate understanding of psychrometric and density charts. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The values off psychrometric charts are correctly read. 

    ASSESSMENT CRITERION 2 
    Charts are used to demonstrate the interpretation of psychrometric processes. 

    ASSESSMENT CRITERION 3 
    The use and application of Lombard's' air density charts is correctly explained. 

    SPECIFIC OUTCOME 3 
    Perform basic psychrometry calculations. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The application of the gas laws is demonstrated by using values obtained from psychrometric charts. 

    ASSESSMENT CRITERION 2 
    The interpolation of psychrometric properties between charts for different barometric pressures is demonstrated. 

    ASSESSMENT CRITERION 3 
    End point values involving changes in heat and moisture content of air are calculated and plotted by using initial values obtained from psychrometric charts. 


    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 
    N/A 

    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 use and interpretation of psychrometric charts and by recommending remedial and preventive measures. 

    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, recording test results in specified formats, and taking 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 for working with psychrometric charts. 

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems by taking 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  Reregistered  2021-06-30  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. ANGLOGOLD ASHANTI LTD (V/R) 
    2. MODIKWA PLATINUM MINE 
    3. Technology Risk Solutions 



    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.