INTRODUCTION

This course enables the successful candidate to engage in the preparation of high quality scuba gases.
 
COURSE OBJECTIVES

The objective of this course is to train candidates in the proper procedures needed for the preparation and blending of high quality gases.

QUALIFICATION OF GRADUATES

Upon successful completion of this course candidates will be able to prepare high quality scuba gases

WHO MAY TEACH

Any active TDI Advanced Gas Blending Instructor may teach this course.

STUDENT INSTRUCTOR RATIO

Classroom
Unlimited so long as adequate facility, supplies and additional time are provided to insure comprehensive and complete training.

STUDENT PRE-REQUISITES

A. Minimum age 18
B. Minimum certification of Nitrox Diver
C. Certification of TDI Nitrox Gas Blender

REQUIRED COURSE MINIMUMS

Classroom Hours - 6
Candidates must successfully blend and analyze a minimum of 5 ylinders of nitrox and 3 cylinders of Trimix

REQUIRED SUBJECT AREAS

The following topics must be covered during this course. 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.

A. The Responsibility of the Gas Blender

B. Gases of Diving
1. Oxygen
2. Nitrogen
3. Helium
4. Other gases

C. Oxygen Handling
1. Oxygen hazards
2. Causes and prevention of oxygen fire
3. Oxygen system design
4. Local regulations for gas blending and handling
5. Oxygen compatible systems components

D. Gas Production Equipment
1. Compressors
2. Cylinders
3. Filtration systems
4. Gauges

E. Mixing Techniques
1. General considerations
2. Continuous blending systems
3. Membrane separation systems
4. Pre-mix systems
5. Partial pressure blending
a. Mathematics of partial pressure
b. Mixing by weight (optional)

F. Oxygen analysis
1. Procedures
2. Oxygen analyzers

G. Cylinder Handling & Sign Out

GRADUATION REQUIREMENTS

In order to complete this course, students must:
A. Satisfactorily completes the TDI Advanced Gas Blender written examination.
B. Demonstrate proficiency in blending and analysis of nitrox and Trimix gases.

SUPPORT MATERIALS

A. TDI Student Record Folder
B. TDI Advanced Gas Blender Manual
C. TDI Overheads / Power Point Presentation