[PSUBS-MAILIST] CO2

Mon Jun 2 21:24:56 EDT 2025

That's great news Hugh.
All the best with the testing.
I bought my sofa lime from Global Dive years ago. Presume they are still selling it.
Alan

Yahoo Mail: Search, organise, conquer 

  On Tue, 3 Jun 2025 at 10:57 am, via Personal_Submersibles<personal_submersibles at psubs.org> wrote:   I am finally getting near to a pool test after 15 years.  Weeks now not
months.
I have been plagued with CANBUS issues and now trying to get an HMI
interface working for all the sensors, batteries, etc. 
Just a couple of questions for the practical people.

1. What is the accepted 3 day quantity of sofnolime for 2 people.  
2. What size is recommended for the scrubbers?
3. Where is the bet place to buy it.

Regards,
Hugh

-----Original Message-----
From: Personal_Submersibles <personal_submersibles-bounces at psubs.org> On
Behalf Of via Personal_Submersibles
Sent: Tuesday, 3 June 2025 4:56 AM
To: personal_submersibles at psubs.org
Subject: Personal_Submersibles Digest, Vol 138, Issue 1

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Today's Topics:

  1. Re: CO2 (Jon Wallace via Personal_Submersibles)
  2. Re: CO2 (Rick Patton via Personal_Submersibles)
  3. Re: CO2 (Alan James via Personal_Submersibles)
  4. buffing (Rick Patton via Personal_Submersibles)
  5. Re: buffing (Jon Wallace via Personal_Submersibles)

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Message: 1
Date: Sat, 31 May 2025 15:11:29 +0000 (UTC)
From: Jon Wallace via Personal_Submersibles
    <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion
    <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] CO2
Message-ID: <11643796.3454108.1748704289349 at mail.yahoo.com>
Content-Type: text/plain; charset="utf-8"

 Alan will like this, ChatGPT says 0.0523 kg CO2 within 1217 liters (approx
volume of K350) converts to 21,891 ppm.? That corresponds closely to the
empirical results Steve McQueen got with his K-250.
Jon

    On Saturday, May 31, 2025 at 12:28:47 AM EDT, Sean T. Stevenson via
Personal_Submersibles <personal_submersibles at psubs.org> wrote:  

Per the ABS RULES FOR BUILDING AND CLASSING UNDERWATER VEHICLES, SYSTEMS AND
HYPERBARIC FACILITIES (2024):

Section 8
Life Support and Environmental Control Systems

8.5
Design Principles

8.5.5
Standard Person (2013)

Carbon Dioxide (CO2) Produced:
0.0523 (0.115) kg (lbs) per hour at 1 atm.

Sean

-------- Original Message --------
On 2025-05-30 20:46, irox via Personal_Submersibles wrote:

One consideration. CO2 is heavier than Nitrogen, so it may sink to the
floor, if the meter is near the floor the reading may not be representative
of the actual cabin CO2 level. Also if the meter is somewhere than CO2 can
'pool' around it reading may be higher.

?

Moving around will also help mix up gases which may help give a more
accurate CO2 reading.

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Message: 2
Date: Sat, 31 May 2025 07:42:49 -1000
From: Rick Patton via Personal_Submersibles
    <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion
    <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] CO2
Message-ID:
    <CAODkcU-b8z_4ycqM0vf=Jo4qAnEeP0OR4fSnCFEVDMLOAmXcXw at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

I had the monitor in the middle of the hull so it would give an accurate
reading. I know that Co2 is heavy but what confuses me is the fact that it
rose so fast when lying down and then started dropping when I sat up?? I
have a fan installed in the back for atmosphere circulation while submerged
but it is noisier than I would like but really moves the air around but
might end up using a computer fan, just concerned that I will get the proper
movement of air.

Rick

On Sat, May 31, 2025 at 5:01?AM Jon Wallace via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Rick,
>
> If you haven't already I would install some fans to help circulate the 
> air.  I have two 4inch computer fans, one fore, one aft, that work 
> pretty good for this purpose and they draw negligible power.
>
> Jon
>
>
>
> On Friday, May 30, 2025 at 11:47:24 PM EDT, irox via 
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> One consideration. CO2 is heavier than Nitrogen, so it may sink to the 
> floor, if the meter is near the floor the reading may not be 
> representative of the actual cabin CO2 level. Also if the meter is 
> somewhere than CO2 can 'pool' around it reading may be higher.
>
>
>
> Moving around will also help mix up gases which may help give a more 
> accurate CO2 reading.
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
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Message: 3
Date: Sat, 31 May 2025 21:12:05 +0000 (UTC)
From: Alan James via Personal_Submersibles
    <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion
    <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] CO2
Message-ID: <1475430295.3543034.1748725926000 at mail.yahoo.com>
Content-Type: text/plain; charset="utf-8"

Jon,
I get mixed results with chat GPT.
I have the paid version & was advised by an expert to select the 03 variant
that is a lot slower & more thorough, but requires you to be more specific
in your requests.
I asked it to design a scrubber for me but the result was pretty
disappointing. 
It is very good at calculations.
Some times it comes up with amazing results, other times you need to correct
it several times. 
Alan

Yahoo Mail: Search, organise, conquer 

  On Sun, 1 Jun 2025 at 1:12 am, Jon Wallace via
Personal_Submersibles<personal_submersibles at psubs.org> wrote:
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Message: 4
Date: Sun, 1 Jun 2025 09:33:15 -1000
From: Rick Patton via Personal_Submersibles
    <personal_submersibles at psubs.org>
To: psubs chat room <personal_submersibles at psubs.org>
Subject: [PSUBS-MAILIST] buffing
Message-ID:
    <CAODkcU8rXbDj_0wnVXb1n41VtczeX2o2Zh4oReE48TYAcrjT6w at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Jon, the Novus compound that I ordered for cleaning up a viewport should be
here in a couple of days and was wondering if there was a certain type of
buffing pad you used and should I be concerned about the RPM I use?

Rick
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Message: 5
Date: Mon, 2 Jun 2025 16:55:16 +0000 (UTC)
From: Jon Wallace via Personal_Submersibles
    <personal_submersibles at psubs.org>
To: psubs chat room <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] buffing
Message-ID: <321358833.4029036.1748883316841 at mail.yahoo.com>
Content-Type: text/plain; charset="utf-8"

 Rick,?
I don't think the pad actually matters all that much but see link for pads I
purchased.? Don't mix the compound and pads, use only one compound with each
pad.? I used the green pad for the coarse polish and yellow pad for the fine
polish.? Speed also doesn't matter in my opinion, I think I used medium
speed.? Beware of your surroundings however, a motorized buffer with throw
some of the polish around and it's difficult to get off when it dries.? Use
a drop cloth or plastic to protect anything in the vicinity that you don't
want to get polish on.? As well, the polish will get all over your buffer so
will require some cleanup when you are done.
Amazon.com

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Amazon.com

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    On Sunday, June 1, 2025 at 03:35:02 PM EDT, Rick Patton via
Personal_Submersibles <personal_submersibles at psubs.org> wrote:  

 Jon, the Novus compound?that I ordered for cleaning up a viewport should be
here in a couple of days and was wondering if there was a certain?type of
buffing pad you used and should I be concerned about the RPM I use??
Rick_______________________________________________
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