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To quote George Irvine in the Wakulla VIDEO, "You should never dive a tank you did not analyze yourself." Maybe in the near future we can have everyone equipped with low cost O2 analyzers, and make it a standard/universal practice to analyze gas before use. With the upcoming mass penetration of nitrox, I think it is going to become necessary and life saving. Charles bdcy36a@pr*.co* Uninformed divers are DEAD divers, spread the TRUTH! << Start of Forwarded message via prodigy (R) mail >> From: Scott Cherf Subject: Re: Nitrox Stickers Date: 11/13 Time: 12:37 PM Date: Mon, 13 Nov 1995 09:20:43 -0700 From: Scott Cherf [cherf@ci*.co*] Subject: Re: Nitrox Stickers At 11:41 AM 11/12/95, RatDiver wrote: >I see a "big deal" in putting *air*, hydrocarbon free or otherwise into a tank >marked for nitrox. > >Mis-use is a mislabeled tank with regard to its contents, not the purity of its >contents. It's mis-use if the tank is filled with *non* hydrocarbon- free >nitrox >or hydrocarbon free air. I do not see the problem as "what could happen" >or how >dangerous is this... The tank should contain what its identification says. >That only makes sense. > >The fact that someone can create a scenario showing how 21% in a nitrox tank >might not hurt anyone is specious to the labeing argument. We can create >scenarios going both ways all day long. We dont bend rules simply because no >one might get hurt. We adhere to the rules for the unforseen and the >unexpected. > >What can the reasonable person expect to find inside, based on what the outside >says or doesn't say? I'd say that a person could reasonably expect to find air in an unmarked tank, and some unknown mixture of gasses in a marked tank. The key part of the definition is 'unknown'. A marked tank must be analyzed prior to use. If the analysis reveals 21% O2, and the tank is marked 'nitrox' it may be reasonable to assume the balance of the gas is N2, but I'm not too sure about this. My nitrox tanks have a content sticker with entries for %O2, %N2 and %He, which kind of implies that they might contain trimix. I think the purpose of the marking is to alert the user that no assumptions should be made about the gas content of the tank; it's not a guarantee of the tank content, at best it's a reminder for the owner. My $0.2, Scott. -- Send mail for the `techdiver' mailing list to `techdiver@terra.net'. Send subscription/archive requests to `techdiver-request@terra.net'. -------- Original message header follows -------- From owner-techdiver@terra.net Mon Nov 13 12:37:25 1995 [PIM 3.2- 342.56] Received: from bighorn.terra.net (root@bi*.te*.ne* [199.103.128. 2]) by pimaia1w.prodigy.com (8.6.10/8.6.9) with ESMTP id MAA41682; Mon, 13 Nov 1995 12:37:34 -0500 Received: (daemon@lo*) by bighorn.terra.net (8.7/jr2.10) id MAA23137; Mon, 13 Nov 1995 12:20:14 -0500 Precedence: bulk Errors-To: owner-techdiver@terra.net Received: from airedale.cisco.com (airedale.cisco.com [171.69.1.135]) by bighorn.terra.net (8.7/jr2.10) with SMTP id MAA23098; Mon, 13 Nov 1995 12:20:11 -0500 Received: from [171.69.126.155] (sl-chanty-01.cisco.com [171.69.126. 155]) by airedale.cisco.com (8.6.8+c/8.6.5) with SMTP id JAA24636; Mon, 13 Nov 1995 09:19:50 -0800 X-Sender: cherf@ai*.ci*.co* Message-Id: <accd1ded040210034c4b@[171.69.126.155]> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Mon, 13 Nov 1995 09:20:43 -0700 To: RatDiver <75363.767@co*.co*> From: cherf@ci*.co* (Scott Cherf) Subject: Re: Nitrox Stickers Cc: techdiver <techdiver@terra.net> -------------- End of message --------------- << End of Forwarded message >>
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