[PSUBS-MAILIST] CO in cabin

[James Frankland via Personal_Submersibles]

Hi Emile,

Yes, there was condensation when I was being towed out.  (I think I was
breathing hard as it was a horrible tow).  The alarm was sounding then.

Hopefully that is the problem.   I just cant think where any CO would come
from.

I will do a test and see.

Thanks
james

On 2 October 2015 at 16:12, Emile van Essen via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> James,
>
>
>
> I saw some condensation on de vid.. You quickly have 95 %
>
> Never read somewhere that CO was a issue in a electric sub
>
>
>
> Regards, Emile
>
>
> ------------------------------
>
> *Van:* Personal_Submersibles [mailto:
> personal_submersibles-bounces at psubs.org] *Namens *James Frankland via
> Personal_Submersibles
> *Verzonden:* vrijdag 2 oktober 2015 17:05
> *Aan:* Personal Submersibles General Discussion
> *Onderwerp:* Re: [PSUBS-MAILIST] CO in cabin
>
>
>
> Hi Antoine.
>
>
> I have got a humidity meter, but I wasn't really looking at it.  It wasn't
> that high.  It was on the tow out, but for the dives I wasn't really
> steamed up or anything inside.  However, it could be something like that.
> Maybe I will do a dry dive and test it.
>
>
> Thanks
>
> James
>
>
>
> On 2 October 2015 at 15:43, Antoine Delafargue via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Hi James,
> I am no specialist but when I searched for meters for Pilot Fish, I
> was told that
> these type of meters based on electrochemical cells are not be rated
> for near 100% humidity, since they can misidentify water vapor or
> droplets as CO2 (CO I don t know but could be similar effect)
> Did you record humidity level?
>
> regards
> Antoine
>
> On 10/2/15, James Frankland via Personal_Submersibles
> <personal_submersibles at psubs.org> wrote:
> > Hi All
> >
> > Last dive at the weekend I was using an MSA Orion plus, multi gas meter.
> > This came from my uncle who is a safety officer at a UK coal mine.  Its
> all
> > in current calibration etc.
> >
> > Anyway, I am using it really for the O2 sensor, however, it also has 3
> > other sensors for use in the mine.  Carbon Monoxide, Methane and
> Hydrogen.
> > (pity it doesn't have the CO2 sensor instead).
> >
> > After about 10 mins of diving, I was getting an alarm of 30ppm CO.  This
> is
> > the level deemed safe for an 8 hour exposure to CO.  (Time weighted
> > average).
> >
> > So, I wasn't particularly worried, but I am mystified where the CO is
> > coming from, even a small amount.  Battery pods are sealed shut.  Could
> it
> > be the scrubber?  The absorbent is calcium hydroxide and lime.
> >
> > Any ideas anyone?
> > Thanks
> > James
> >
> >
> > ​
> >
>
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