<DIV style="font-family:Arial, sans-serif; font-size:10pt;"><DIV>Alan, It's a long list ! What I need to do is make a check list of things I have wrong ;-) and then "things I have wrong but can maybe slide on" ! One question, right of the bat, with that O2 not being able to fill the cabin space more than one atmosphere, I'm not understanding the terminology , how can it be possible to release a volume of air from a bottle WITHOUT raising the pressure above one atm if your are already at one atm ?</DIV><DIV> </DIV><DIV>I should go around my sub with a video camera inside and out and you could really get an idea of what I need ! For instance I know I need an additional ballast tank HP cylinder. </DIV><DIV> </DIV><DIV>Brian </DIV><DIV> </DIV><DIV><BR><BR>--- personal_submersibles@psubs.org wrote:<BR><BR>From: Alan via Personal_Submersibles <personal_submersibles@psubs.org><BR>To: Personal Submersibles General Discussion <personal_submersibles@psubs.org><BR>Subject: Re: [PSUBS-MAILIST] Commercial Grade O2 vs. Medical<BR>Date: Thu, 4 Jan 2018 13:52:57 +1300<BR><BR></DIV><DIV>Brian,</DIV><DIV>fire away; there are a few people on psubs that are familiar with GL & or</DIV><DIV>ABS. </DIV><DIV>Alan<BR><BR>Sent from my iPad</DIV><DIV><BR>On 4/01/2018, at 1:37 PM, Brian Cox via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:<BR><BR></DIV><BLOCKQUOTE><DIV><DIV style="font-family: Arial, sans-serif; font-size: 10pt;"><DIV>Great info Alan ! BTW I need to pick your brain on some of the Lloyd's or ABS regs or equivalent.</DIV><DIV> </DIV><DIV>Brian</DIV><DIV> </DIV><DIV> <BR><BR>--- <A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A> wrote:<BR><BR>From: Alan via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>><BR>To: Personal Submersibles General Discussion <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>><BR>Subject: Re: [PSUBS-MAILIST] Commercial Grade O2 vs. Medical<BR>Date: Thu, 4 Jan 2018 13:22:59 +1300<BR><BR></DIV><DIV>Brian, </DIV><DIV>here is a link with some info.</DIV><DIV><A href="https://www.padi.com/padi-courses/emergency-oxygen-provider">https://www.padi.com/padi-courses/emergency-oxygen-provider</A></DIV><DIV>The best way about it is to enquire at your local dive shop as they will </DIV><DIV>probably run a course if they have a few interested people.</DIV><DIV>Alan</DIV><DIV><BR><BR>Sent from my iPad</DIV><DIV><BR>On 4/01/2018, at 1:04 PM, Alan via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:<BR><BR></DIV><BLOCKQUOTE><DIV><DIV>Brian,</DIV><DIV>I did an Emergency O2 providers course at a dive shop that sold O2.</DIV><DIV>Now have a card with my face on it.</DIV><DIV>I don't know if there are any regulations, but I get on well with the manager</DIV><DIV>& this is what he was happy with me doing before he would fill O2.</DIV><DIV>This was the easiest option, cheap & Only a couple of nights. </DIV><DIV>I think if I went to any dive shop in the World & pulled out my Padi O2 card</DIV><DIV>they would be happy to fill. Also we are carrying O2 so are able to provide it</DIV><DIV>in a diving emergency, so thats an advantage to divers.</DIV><DIV>Medical O2 providers may also be convinced to fill for you if you have the card.</DIV><DIV>The other option for me was to do a mixed gas diving course which is much</DIV><DIV>more expensive & intense.</DIV><DIV>Cheers Alan</DIV><DIV> </DIV><DIV><BR>Sent from my iPad</DIV><DIV><BR>On 4/01/2018, at 12:16 PM, Brian Cox via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:<BR><BR></DIV><BLOCKQUOTE><DIV><DIV style="font-family: Arial, sans-serif; font-size: 10pt;"><DIV>Alan, What's involved with getting a O2 cert for administering O2 ?</DIV><DIV> </DIV><DIV>Brian<BR><BR>--- <A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A> wrote:<BR><BR>From: Alan via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>><BR>To: Personal Submersibles General Discussion <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>><BR>Subject: Re: [PSUBS-MAILIST] Commercial Grade O2 vs. Medical<BR>Date: Thu, 4 Jan 2018 11:21:46 +1300<BR><BR></DIV><DIV>Steve,</DIV><DIV>not the most experienced but this is what I'm doing.</DIV><DIV>I have 2 steel O2 cleaned tanks. ( 2 tanks as per GL for redundancy)</DIV><DIV>I have O2 cleaned scuba regulators & get my tanks filled at a dive shop.</DIV><DIV>Had to have an emergency O2 provider cert first.</DIV><DIV>I believe Nuytco were using composite tanks at one stage.</DIV><DIV>O2 tank options & fitting options here. (EMT medical)</DIV><DIV><A href="http://www.emtmedicalco.com/OXYGEN-CYLINDERS-ALUMINUM-STEEL-COMPOSITE_c64.htm">http://www.emtmedicalco.com/OXYGEN-CYLINDERS-ALUMINUM-STEEL-COMPOSITE_c64.htm</A></DIV><DIV>You will need a tank fitting suitable for where you intend filling i.e. dive shop</DIV><DIV>or medical O2 supplier. Then you will need a compatible regulator . If you were </DIV><DIV>heading across country for a few dives maybe have interchangeable fittings or </DIV><DIV>spare tanks with different fittings if you need to switch between medical & dive</DIV><DIV>suppliers. ( I haven't heard this discussed before) </DIV><DIV>I have heard people say that medical & commercial O2 tank swap people don't</DIV><DIV>like the idea of their tanks going under the water. They also may require some</DIV><DIV>sort of certificate from you before they fill.</DIV><DIV>Have read of deaths from people using commercial rather than medical O2, but</DIV><DIV>this would be 100% O2 inhaled straight in to the lungs.</DIV><DIV>Phil offered to sell his O2 add system to Psubbers.</DIV><DIV>I am using a paediatric flow meter set at a minimal flow & are topping up via</DIV><DIV>3 x O2 sensors wired to my PLC & operating a solenoid valve on the low pressure </DIV><DIV>O2 line. The PLC will be comparing the 3 readings & going with the average of</DIV><DIV>the 2 readings closest to each other. The PLC will notify me when the range of</DIV><DIV>one O2 sensor is out relative to the other 2 or the reading of the nearest 2 differ </DIV><DIV>by a certain amount & may need replacing. I think the life of a sensor is only</DIV><DIV>a year or so depending on the heat it is stored at. Being a small one person sub</DIV><DIV>I need to be a lot more careful as the O2 % can change a lot more quickly.</DIV><DIV>Cheers Alan</DIV><DIV><BR></DIV><DIV><BR></DIV><DIV><BR><BR><DIV>Sent from my iPad</DIV></DIV><DIV><BR>On 4/01/2018, at 7:10 AM, Steve McQueen via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:<BR><BR></DIV><BLOCKQUOTE><DIV><SPAN>I tried to search the archives but it wasn't very friendly. Sorry to again ask about something I know has probably been discussed.</SPAN><BR><SPAN></SPAN><BR><SPAN>I wanted to double ck. my O2 strategy. After some investigation it seems I will buy a new steel high pressure oxygen tank for external mounting. My plan is to have it refilled with "commercial grade" O2 vs. medical grade 02. As long as I keep my "personal" tank and not allow the filler to swap tanks I should create a "chain of custody" that will help me feel good about not having contamination.</SPAN><BR><SPAN></SPAN><BR><SPAN>I am wondering how others are managing.</SPAN><BR><SPAN></SPAN><BR><SPAN>Thanks,</SPAN><BR><SPAN>Steve</SPAN><BR><SPAN>_______________________________________________</SPAN><BR><SPAN>Personal_Submersibles mailing list</SPAN><BR><SPAN><A href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</A></SPAN><BR><SPAN><A href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</A></SPAN><BR></DIV></BLOCKQUOTE>_______________________________________________
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