[Dsg-mvt] Request new manometer for Eel premix gas system + interlock

[Amrit Yegneswaran]

but why in the world would anyone install or agree to the installation of a 0psi to 4000 psi gauge to measure 200 psi max from the cylinder. might as well measure the volume of the mvt in pc**3 (parsec**3), and conclude it doesn't exist. problem solved. 



From: "Brian Eng" <beng at jlab.org> 
To: "Franck Sabatie" <sabatie at jlab.org> 
Cc: "guillaume christiaens" <guillaume.christiaens at cea.fr>, "Patrizia Rossi" <rossi at jlab.org>, "Maxime Defurne" <maxime.defurne at cea.fr>, "Nathan Baltzell" <baltzell at jlab.org>, "Wesley Moore" <wmoore at jlab.org>, "Burkert Volker" <burkert at jlab.org>, dsg-mvt at jlab.org 
Sent: Monday, June 12, 2017 12:40:37 PM 
Subject: Re: [Dsg-mvt] Request new manometer for Eel premix gas system + interlock 

Hi Franck, 

It could be nearly empty, but it is also just as likely to be that the pressure is to low for the gauge. 

Generally those are spec'd to a few percent but only in the range of 25-75% of the scale, since we already start way below that there's no way to really tell exactly what the pressure in the bottle is. Not to mention the first tick mark is 200 psi, which isn't much below what the bottle is filled to. 

Hopefully this will be improved when the 600 psi gauges that Matt approved are installed, which is currently in procurement with a buyer assigned. 

For the time being you guys can monitor the low pressure side for changes, when it can't maintain 15psi is when the bottle is almost empty. 

Is your Argon sniffer still at JLAB or did that go back to Saclay? 

> On Jun 12, 2017, at 11:48 AM, Franck Sabatie <sabatie at jlab.org> wrote: 
> 
> Dear Marc, 
> 
> It looks nearly empty (or am I reading this wrong?), which is odd : we only use 7l/h, a new bottle should last 5-7 days. Maybe there is a leak somewhere before or gas rack (we check input vs output flow). 
> 
> Franck 
> 
> Le lun. 12 juin 2017 à 17:45, Marc McMullen <mcmullen at jlab.org> a écrit : 
> Hi All, 
> 
> Attached is an updated photo of the MVT regulator from this morning (about 10:40am). This bottle was connected around 2pm on Friday. 
> 
> Thanks, 
> 
> Marc 

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