[Dsg-rtpc] Gas panel Components

[mhattawy@odu.edu]

Dear DSG Group,
 The BONuS group has noticed this morning some changes to the gas panel
have been early this morning or late yasterday. To make our life easier for
all of us, we do document our work progress using a shared E-Logbook on
google. I would like to ask you to document your changes in the presence
and in the absence of our students and collaborators using the same
E-logbook (
https://urldefense.proofpoint.com/v2/url?u=https-3A__docs.google.com_spreadsheets_d_1c40coDW4xetSMUea-2DevkNKc-5FlsBrcOy-2DvebP8aZsFqw_edit-23gid-3D0&d=DwIFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=kRhlhZCB9qDkuU1aDzScieZNkArOqt3zjTsrztP9Zco&m=2A8MbsT1hZxNCafTBY5wnFSR8LaOhO0DzTusZzFv7PY&s=BtS0xfbu4MB-cApKwcn6GiStrE6S5U5ZxKYco_QUlcI&e= ),
so that we avoid sending you tons of emails asking what have changed or why
such changes.

Best regards,
Mohammad.

On Wed, Jun 12, 2019 at 10:33 AM Narbe Kalantarians <narbe at jlab.org> wrote:

> Hi Everyone,
>
> Madhu noticed this morning that the flow rate was set to 0. Brian noticed
> that the software for the drift gas system was reset. We got it back to
> bubbling at a rate of 250 sccm.
>
> When DSG replaces the next pressure sensor it would be to have Madhu,
> Raemaad, and Jiwan be there see it.
>
> *Narbe Kalantarians, Ph. D.*
> Assistant Professor of Physics
> Virginia Union University, Dept. of Natural Sciences
> +1-804-257-5617 (VUU)
> +1-757-269-5566 (JLab)
>
>
>
>
>
> On Jun 11, 2019, at 3:54 PM, George Jacobs <jacobsg at jlab.org> wrote:
>
> CV1 is a pressure bleed off valve. It's purpose is to limit pressure in
> the DMS gas volume to 1 psi in case of operator (human) error.
>
> The purpose of most, if not all, gas system componenets is covered in the
> attached document from Aug 2018.
>
> --
> George Jacobs
> Jefferson Lab (TJNAF)
> STE 12
> 12000 Jefferson Ave.
> Newport News, VA 23606
> (office) 757-269-7021
> (email) jacobsg at jlab.org
>
>
> ------------------------------
> *From:* Dsg-rtpc <dsg-rtpc-bounces at jlab.org> on behalf of Kuhn, Sebastian
> E. <skuhn at odu.edu>
> *Sent:* Tuesday, June 11, 2019 3:41 PM
> *To:* Carlos Ayerbe Gayoso
> *Cc:* Hattawy, Mohammad; dsg-rtpc at jlab.org; DZBENSKI, NATHAN M.; POUDEL,
> JIWAN; POKHREL, MADHUSUDHAN
> *Subject:* Re: [Dsg-rtpc] Gas panel
>
> Apparently mine olden eyes are going bad (in fact, I’ll have surgery in 2
> weeks!)
> I had overlooked PT3 - that’s exactly what I meant. So all is good. I
> still think that we need to find out what the purpose of CV1 is, and if we
> don’t need it (to maintain pressure vessel compliance), we should take it
> out. We can ask Bill Crahen.
>
> Other than that, I’m looking forward to a picture of just the gas panel
> (no need to include people ;-)
>
> - Sebastian
>
> BTW, I hope we can keep those “last minute addition” pressure meters as
> they will be VERY useful during the run…
>
> On Jun 11, 2019, at 3:36 PM, Carlos Ayerbe Gayoso <gayoso at jlab.org> wrote:
>
>
>    1. so you want to measure the pressure before and after the buffer
>    volume? because PT3 is supposed to measure the differential pressure
>    buffer/atmosphere (and it was your suggestion). PI2 is a pressure
>    indicator  before the flowmeter TO the buffer volume.
>
>
>
> <The RTPC Gas Supply System Layout.pdf>
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-- 
Best regards,
Mohammad Hattawy.
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