Re: [PSUBS-MAILIST] Barometers

[MerlinSub@t-online.de]

You should eliminate all "larger variations in pressure" 
reason during your thousands of garage test dives.. 

A "larger variations in pressure" in a sub is a defcon 2 level... 
Special if you 02 raise up.. 

vbe carsten

"Alan James" <alanjames@xtra.co.nz> schrieb:
> Carsten,
> was that your experience with SGT Peppers?
> I am also making a small sub & Having a small internal volume 
> it would be more likely to have larger variations in pressure.
> Alan
> 
> ----- Original Message ----- 
> From: <MerlinSub@t-online.de>
> To: <personal_submersibles@psubs.org>
> Sent: Thursday, December 30, 2010 5:17 AM
> Subject: Re: [PSUBS-MAILIST] Barometers
> 
> 
> A standard barometer is just fine. 
> Read it during closing the hatch - and adjust the "stay" arrow to the number. 
> Means bring both indicators to the same figure.
> If during the dive the barometer indicator increase this means you have a gas leak in your sub..
> To much oxygen flow or a leak in the compress air system. 
> 
> vbr carsten
> 
> "Alan James" <alanjames@xtra.co.nz> schrieb:
> > Hi,
> > I've just started looking at barometers.
> > The standard range for a barometer seems to be round 960 - 1060 milli bars.
> > This is a range of 1.47 psi. This seems small considering pressure changes
> > due to cold or hot conditions & fluctuations due to O2 consumption & response times of the life support
> > system to adjust for this. Can anyone comment on wether a standard barometer stays within it's scale, 
> > or wether I'd be better off buying something electronic with a wider range.
> > Regards Alan
> > 
> 
> 
> 
> 
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