SueMermaid
Guest
Always. Always. Always. Always. And I repeat: Always. Analyze, then stick a label on your tank with the analysis. What dive shop would not require that?
Do you check tanks for pressure and contents before you leave the shop?
- Thread starter dabigcat
- Start date
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Dectek
Guest
You mean to tell me that everyone here Analyzes air...NOT EANS...but good old 21%air?
I find that hard to swallow.
I find that hard to swallow.
I've only used nitrox a little, but with air a drop of 200 psi or so is normal. If the tank got warm when filling it will increase the pressure, then when it cools the pressure drops. I pride myself in exact 3000 psi when the tanks are cool, but some other people don't care and let it get hot.
The gas is hot because it's been compressed, it has nothing to do with an O2 tank.
You would have to wait a number of hours to have a fully stabilized air temp, then it would change as soon as you went outside or got in the water. Just make sure the fill is what you want when you get it. Recheck the pressure and Po2 before you dive, and don't worry about it.
MD
Ahh, but how do you KNOW its 21%.
If the air is hard to swallow, it probably has oil in it.
MD
The Chairman
Chairman of the Board
at the request of dabigcat, who has their PM turned off, so I can't tell them that I honored their request off-thread. :tease:
The Chairman
Chairman of the Board
compression. The O2 had nothing to do with it. I never pick up or analyse a hot mix... I plan ahead to avoid that. I don't have to "worry about it" as I don't let the temperature be a variable. IF the air tank you are using as a cal gas were to be the same temp, then there would be no issue. Many divers go so far as to not even use a compressed air cylinder to calibrate but rely on the unit to calibrate to atmospheric air. That's their choice... I take my diving seriously enough to do it correctly. :tease:
SueMermaid
Guest
No, you big silly, just mixes.
ut:Ziggys_Friend
Guest
Actually this exact topic came up last weekend at our DIR-F class and the answer given was - "no, but they sure should." Bottom line, if YOU are going to dive a tank, YOU are responsible for knowing what's; in it and you simply can't if you don't analyze it. It's that simple really.
Real world, lot of people don't, but that doesn't change what's best. For me, I'm now a believer and as soon as I can I'm getting my own analyzer and in the near future, EVERY tank I breathe, mix or not, I'll be analyzing.
~<//><
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