[PSUBS-MAILIST] At Home O2 Cleaning Process

Tue Jan 9 19:49:02 EST 2018

Can't get into my contacts page to send a new thread rite now (I hate
computers) so gonna tag this thread for something different, sorry...

I am getting ready to purchase my amp and volt meters for the 12V and 36V
banks and had a few questions. There are two ways that I know of to tap
into a line to measure current. One is a direct splice and the other is
using a meter that has a DROK/necklace that encircles the wire you want to
measure. Would like to know the best way to go on those types. It would be
a lot easier to use a necklace type to minimize the amount of splices that
I have to make and moisture proof but a friend of mine said that there is a
minute difference in readings if the wire is up against the side of the
necklace rather than in the middle and I also wounder if having the
necklace up against the steel hull would mess with the readings?  I also
assume that I should have a separate amp meter for each of my three
thrusters?
Thanks
Rick

On Mon, Jan 8, 2018 at 6:08 AM, Brian Cox via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Cliff,   I ordered those items !    I'm going to get another style flow
> meter as well .  How accurate is that acrylic flow meter?
>
> Brian
>
>
>
> --- personal_submersibles at psubs.org wrote:
>
> From: Cliff Redus via Personal_Submersibles <personal_submersibles at psubs.
> org>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.
> org>
> Subject: Re: [PSUBS-MAILIST] At Home O2 Cleaning Process
> Date: Sun, 7 Jan 2018 14:21:18 -0600
>
> Brian, in my (Air Monitoring, Oxygen Control) AMOC system, I use a Porter
> 201-FSVP mass controller.  Ebay has these units for sell all the time at
> pennies on the dollar. These unit will both measure the mass rate of the
> gas in SLPM and also control it. There are two 0-5VDC control signals for
> the unit.  For this partuclar unit which has a 0-10 SLPM span, if you give
> the controller pin 5V, then it will pass 10 SLPM if you give it 0V, it will
> pass zero SLPM.  The other singal is an analog voltage output signal again
> 5Vdc for full span, would be a measured 10 SLPM and a zero signal means it
> is reading zero mass flowrate of gas.  https://www.ebay.com/itm/
> Porter-201-AFASVPAA-Mass-Flow-Controller-10-SLPM-760-Torr-
> MFC/232159305887?hash=item360dc5e09f:g:BTAAAOSwmrlUrcG1 is a link to ebay
> for a unit very close to this.  Porter (Parker) make a ton of different
> controller for different rates and different gasses.  The controller as a 9
> pin blade style connector that is used widely in the medical industry.  The
> documentation on these meters is excellent and you can download it
> https://www.parker.com/literature/MFM%20&%20MFC%20(D-
> Conn.)%20(FM-898%20Rev.%20E).pdf .  The manual calls out the spec for the
> connector.  I use this unit with a PLC but single it is analog voltage
> signals, you could control with potentiometer off a 5VDC source.  Likewise
> you could use an analog display that would take a 0-5VDC signal if you
> wanted. I have found these units to be very reliable.  In my Life support
> system module, I use a Swagelok a Vernier needle valve model SS-SS4-VH as
> a bypass around this controller for manual O2 bleed control.  As a backup,
> I use a variable area meter like https://www.amazon.com/dp/
> B019YS4PSG/ref=asc_df_B019YS4PSG5328541/?tag=hyprod-20&creative=395033&
> creativeASIN=B019YS4PSG&linkCode=df0&hvadid=198097951144&hvpos=1o1&hvnetw=
> g&hvrand=6957636125906653374&hvpone=&hvptwo=&hvqmt=&hvdev=
> c&hvdvcmdl=&hvlocint=&hvlocphy=9027968&hvtargid=pla-542207540152 .
>
> Cliff
>
> On Sat, Jan 6, 2018 at 1:56 PM, Brian Cox via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> I just talked to my local dive shop and they will fill O2 no questions
> asked .  They say they do it all the time.  I'm thinking of getting set up
> with a package from DAN  Here:
>
>
> https://www.diversalertnetwork.org/dive-store/?catno=9
>
>
> It seems to be somewhat problematic getting the right all the components
> but getting one of these units from the DAN website might make things
> easier as far as getting bottles filled and so forth.  The delivery system
> on these units I don't think has enough fine tuning ability however.  Does
> anyone have a good flow meter to recommend?  Is there an analog type with a
> little ball that floats up and down?
>
>
>
> Brian
>
>
>
> --- personal_submersibles at psubs.org wrote:
>
> From: "Sean T. Stevenson via Personal_Submersibles" <
> personal_submersibles at psubs.org>
> To: personal_submersibles at psubs.org
> Subject: Re: [PSUBS-MAILIST] At Home O2 Cleaning Process
> Date: Sat, 06 Jan 2018 13:58:20 -0500
>
> I use dilute acetic acid to remove any existing corrosion, and then a
> non-solvent hydrocarbon-free detergent solution to clean, followed by a
> freshwater rinse, and possibly another cycle using a separate clean batch
> of detergent solution. Use dedicated brushes for each bin. A lint-free
> cloth should come back clean, and the cleaner solution and rinse water
> should both produce no fluorescence under UV (black light). Dry passively,
> or with filtered air or bottled nitrogen so as not to reintroduce any
> contaminants. Any subsequent lubrication or assembly with lubricated soft
> parts should be done with oxygen compatible lubricants (i.e. Christolube).
>
> Sean
>
> Sent from ProtonMail mobile
>
>
>
> -------- Original Message --------
> On Jan 6, 2018, 09:23, Steve McQueen via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>
> All, I am working on cleaning some parts/pieces for O2 service on my
> K-250. I am buying most items “pre-cleaned” such as: Tank w/Valve, First
> Stage Regulator, Thru Hull Isolation Valve, Flow Regulator.
>
> However, I will have some parts & pieces (mainly misc. adaptors and ¼ SS
> tubing) I may still need to clean.
>
> I know an “at home” process will fall short but looking to create/document
> a procedure anyway.
>
> ·        I am using ASTM G93, "Standard Practice for Cleaning Methods and
> Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched
> Environments" as the standard.
>
> ·
>
> ·        Maybe someone already has a procedure (or opinion) they want to
> share?
>
> Steve
>
>
>
> ·
>
>
> ·        I am using ASTM G93, "Standard Practice for Cleaning Methods and
> Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched
> Environments" as the standard.  I know an “at home” process will fall short
> but looking to create/document a procedure anyway.
>
> ·
>
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