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Never dive ENAX mixes unless you have the capability to check them yourself. See http://www.cisatlantic.com/trimix/trimix.html for more information. On 2/22/98 6:15 PM DavidP6418@ao*.co* wrote: >Dear List, > >I am a recent subscriber to the list and have a question that has been >bothering me for some time. >I am at the low tech end of tech diving. I was nitrox certified 2 1/2 years >ago, primarily for increased bottom time and an increased safety factor. I >do four 60-80 dives in a day and nitrox has been a God send. Unfortunately, >I have come to the realization that the limiting factor in spearfishing is >now >my out of shape ass. >Anyway, I was going to a local dive shop for my nitrox fills, never giving >them any consideration. He would mark the oxygen percentage on the tanks >with a magic marker written on a piece of tape. >Everything was great until two of my friends went to this dive shop to >themselves get nitrox certified. They sat through the theory part of the >class and towards the end of the evening, the instructor/dive shop owner >wanted to show the class how an oxygen analyzer works. The previously >filled >nitrox tanks were sitting along the side wall so he grabbed one of the tanks >to show the class. He measures the first tank and shows the class that it >has 33% oxygen. Unfortunately, the piece of tape on the tank says 32%. >The >next tank is also off by 1%. The next tank is off by 1.5%, the next by 2%. >The final tank was off by 5%! >His explanation was that he had someone else do the fills. The new person >did not wait long enough between the time the tank was filled to do the >oxygen >measuring. He says that the additional time is needed so the oxygen can >mix. >Has anyone ever heard of such a thing? >BTW, since this occurred, I felt I could no longer trust this guy. I have >four six foot oxygen tanks in my garage which I use to pump up our nearly >empty tanks to about 1000 lbs of oxygen I bring these tanks to the dive >shop >(with his knowledge of what I am doing) and have him fill them. Once >home, I >then measure the tanks myself for their oxygen content. >I would appreciate the list's comments. > >Thanks much, > >Dave P >Bonita Springs FL >-- >Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. >Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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