Nitrox: How to calibrate/analyze

[Web Monkey]

The shop I use here (National Aquatic Service) has each person analyze their own tanks.

A shop I used in Tobermory, Ontario has an employee do it, which made me a little uncomfortable, since her calibration method involved letting the sensor hose hang in the air, unattached to a tank and crank the adjust knob until it read about 21.

I'd have a better chance getting an accurate reading by calling the Psychic Friends Network, since she was actually calibrating it against whatever was left around the sensor from the last reading.

My first choice would be to do it myself, however I don't mind if someone else does it, as long as I can see that they're doing it right.

Terry

I'm a little confused now--when you rent a nitrox tank do you get to do the analysis yourself with the shop's analyzer or does the shop worker do the analysis for you? thanks

 

[SDAnderson]

I'm a little confused now--when you rent a nitrox tank do you get to do the analysis yourself with the shop's analyzer or does the shop worker do the analysis for you? thanks

The answer should be: both. The shop should analyze the mix and so should you, it's okay if you do it together but don't cut any corners. Both of you should log the analysis and you should complete and attach a contents/MOD label to your tank.

This has been an interesting (if somewhat technical) discussion of some of the finer points of analysis, the most important thing to remember is that you should ALWAYS analyze your own gas. The shop should analyse your gas and maybe so should your buddy but YOU are your own first line of defense.