Duikteam

12. TDI – Advanced Gas Blender Course

12.1     Introduction
                This course enables the succesful candidate to engage in the blending of oxygen and helium
                based gasses. The opjective of this course is to train condidates in the proper procedures
                needed for the preparation and blending of high quality Nitrox and Trimix gases for use in
                technical diving.

12.2     Qualifications of Gradutes
                Upon succesful completion of this course candidates will be able to prepare high quality
                scuba gases.

12.3     Who May Teach
                Who may tech this course:
                4. Any active TDI Advanced Gas Blending Instructor may teach this course.

12.4     Student – Instructor Ratio
                Academic:
                1.            Unlimited, so long as adequate facility, supplies and time are provided to insure
                               comprehensive and complete training.
                Confined Water (Swimming Pool-like conditions):
                1.            N/A
                Open Water (Ocean, lake, quarry, spring, river or estuary)
                1.            N/A

12.5     Student Pre-Requisites
The student must:
                1.            Be a minimum age of eighteen (18).
                2.            Show proof of certification of TDI Nitrox Gas Blender or equevalent.

12.6     Course Structure and Duration
Open Water Execution:
                1.            N/A
                Course Structure:
                1.            TDI allows instructors to structure courses according to the number of students
                               participating and their skill level.
                Duration:
                1.            The minimum number of class room and briefing hours is six (6).

12.7     Administrative Requirements
The following is the administrative tasks:
                1.            Collect the course fees from all the students.
                2.            Ensure that the dtudents have the required equipment.
                3.            Communicate the training schedule to the students.
                4.            Have the students complete the Liability Release and Medical history forms.
                5.            The instructor must review the Liability Release and Medical Forms before starting on
                               the course.
                Upon succesful completion of the course the Instructor must:
                1.            Complete the Student Registration Form and send the Registration Form to TDI HQ.
                2.            Award card.

12.8     Training Material
Required material
                1.            TDI Advanced Gas Blender Manual.
                Operational Material

12.9     Required Equipment
                The following are required for this course:
                1.            Access to a helium analyzer.

12.10   Required Subject Areas
The TDI Advanced Gas Blender Manual is mandatory for use during this course but
instructors may use any additional text or materials that they feel help present these topics.
                The following topics must be coverd during this course:
                1.            The Responsibility of the Gas Blender.
                2.            Gases of Diving
                               A.           Oxygen.
                               B.            Nitrogen.
                               C.            Helium.
                               D.           Other gases.
                3.            Oxygen Handling
                               A.           Oxygen hazards.
                               B.            Causes and prevention of oxygen fire.
                               C.            Oxygen system design.
                               D.           Local regulations for gas blending and handling.
                               E.            Oxygen compatible systems components.
                4.            Gas Production Equipment
                               A.           Compressors.
                               B.            Cylinders.
                               C.            Filtration systems.
                               D.           Gauges
                5.            Mixing Techniques
                               A.           General considerations.
                               B.            Continuous blending systems.
                               C.            Membrane separation systems.
                               D.           Pre-mix systems.
                               E.            Partipal pressure blending
                                               1.            Mathematics of partial pressure.
                                               2.            Mixing by Weight (optional).
                6.            Oxygen analysis
                               A.           Procedures.
                               B.            Oxygen analyzers.
                7.            Cylinder Handling and Sign Out

12.11   Required Skill Perfomance And Graduation Requirements
                In  order to complete this course, students must:
                1.            Candidates must succesfully blend and analyze a minimum of five (5)
                               cylinders of Nitrox ans three (3) cylindersof Trimix.
                2.            Satisfactorily completes the TDI Advanced Gas Blender written examination.
                3.            Demonstrate profinciency in blending and analysis of Nitrox and Trimix gases.