AIM
To introduce divers, compressor operators and dive equipment technicians to the skills and requirements needed to blend a variety of diving gases in a safe and controlled manner.
DURATION
One day.

ENTRY GRADE No qualification required

APPROVAL
Skill Development Course Approval Procedure applies.

INSTRUCTORS
This course must be provided through BSAC approved gas blending centres and led by an Approved Gas Blending Instructor, assisted either by other Approved Gas Blending Instructors or NQIs seeking such approval - see Note 4. A register of Approved Gas Blending Centres and Instructors is maintained by the Chief Examiner/BSAC HQ.

FACILITIES As an approved BSAC centre the facilities will include a suitable classroom with teaching aids for formal presentations, a fully equipped gas blending workshop and equipment to the specifications laid down in the instructor's gas blending manual.

QUALIFICATION
Course Certification will be issued by BSAC HQ after the event.

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SYLLABUS
Instructor briefing

Assemble, Introductions, Administration. - 10 mins

1. Theory Lesson - Diving Gases and their uses - 45 minutes Course aims
   * Oxygen, Nitrogen and Helium
   * Argon, Neon and Hydrogen
   * Air, Nitrox and Trimix
   * Heliox and Heliair
   
    
2. Theory Lesson - Gas Laws - 23 mins
   * Kinetic Theory of gases
   * Pressure
   * Boyles' Law
   * Dalton's Law
   
    
3. Theory Lesson- Methods of Blending & Gas Analysing - 45mns
   * Pre-mix decanting
   * Continuous Blending
   * Gas Separation
   * Partial Pressure
   * Air Testing Methodology
   * Gas Analysing
    
4. Theory Lesson - Systems Equipment - 30 mins
   * Oxygen Service
   * The Fire Triangle
   * The Compressor system
   * The Filtration system
   * HP Pipework and Hoses
   * Gauges
   * Oxygen Booster Pump
    
5. Theory Lesson - Safe Storage and handling of cylinders & Workshop procedures - 30 mins
   * Hazardous properties of Oxygen
   * Storage gas cylinders
   * Handling & use of gas cylinders
   * Storage facilities
   * Transportation of cylinders
   * Gas Log sheets
    
6. Theory Lesson - Gas Mixing Calculations - 20 mins
   * Nitrox Calculations
   * Nitrox Look-up Table
   * BSAC Gas Calculator use for
   * Nitrox
   * Trimix
   * Heliair
   * Air Tops
    
7. Practical Lesson - Practical Gas Blending and assessment - 180 mins
   * Nitrox blending
   * Trimix blending
   * Heliair Blending
   * Air Top recalculations