[Dsg-halla_gem] [EXTERNAL] Re: Prototype gas distribution system

Tue Jan 26 12:29:35 EST 2021

Hi Marc,

That specific low meter is very bumpy. The ball jumps up and down a lot and
it's difficult to set it to smaller values. But  67 is fine with us I think.

George: Thanks for letting us know. We were actually reading out the values
from the center of the ball so far. Maybe it's not clear in the picture. We
had it at 250 when we were purging the system.

Best
Anu

On Tue, Jan 26, 2021 at 11:49 AM Marc Mcmullen <mcmullen at jlab.org> wrote:

> Is there a reason Ch3 is 67 vs mid 80s for the other three channels?
>
>
>
> Sent from Mail <https://urldefense.proofpoint.com/v2/url?u=https-3A__go.microsoft.com_fwlink_-3FLinkId-3D550986&d=DwIFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=ChpQznS87yxlRqzuJWHUrVvZvZ9aFu8GaVbYMOIWtqM&m=fs7CTswxXeDD4p93X0eLMnsT1M9ZOio1rhwjJzbREvg&s=x9TNQmBj73rl-TcccVF_AhrlzcL4DrVidWOij1_Dyno&e= > for
> Windows 10
>
>
>
> *From: *Anuruddha Rathnayake <adr4zs at virginia.edu>
> *Sent: *Tuesday, January 26, 2021 11:13 AM
> *To: *Marc Mcmullen <mcmullen at jlab.org>
> *Cc: *Liyanage, Nilanga K (nl8n) <nl8n at virginia.edu>;
> dsg-halla_gem at jlab.org; Jeffas, Sean (sj9ry) <sj9ry at virginia.edu>
> *Subject: *Re: [Dsg-halla_gem] [EXTERNAL] Re: Prototype gas distribution
> system
>
>
>
> Hi Marc,
>
>
>
> I just looked and it works.
>
> It seems like the readback is reading out a little less (~230) than what
> is says in thr flo meters (~250).
>
>
>
> Best
>
> Anu
>
>
>
> On Tue, 26 Jan 2021, 11:08 Marc Mcmullen, <mcmullen at jlab.org> wrote:
>
> It doesn’t matter. Please just leave it.
>
>
>
> Sent from Mail
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__go.microsoft.com_fwlink_-3FLinkId-3D550986&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=hQJSuIbzwxGOX7LZbVne0gHeC6U5hlDu99LTH_I02ZM&m=KZk0W2gpGyKzyzyiAbgaQrF2HlUfb3KR-zZ0tDs9BjE&s=iSH9gpwoQuzZ6-mez4WBRpqn-VhrI72rUDFH0oif1BU&e=>
> for Windows 10
>
>
>
> *From: *Anuruddha Rathnayake <adr4zs at virginia.edu>
> *Sent: *Tuesday, January 26, 2021 11:07 AM
> *To: *Marc Mcmullen <mcmullen at jlab.org>
> *Cc: *Liyanage, Nilanga K (nl8n) <nl8n at virginia.edu>;
> dsg-halla_gem at jlab.org; Jeffas, Sean (sj9ry) <sj9ry at virginia.edu>
> *Subject: *Re: [Dsg-halla_gem] [EXTERNAL] Re: Prototype gas distribution
> system
>
>
>
> Hi Marc,
>
>
>
> Also, chuck pulled the network cable out when qe tried to re-orient the
> setup a little bit but didn't realize to which port (input/putput) the
> cable was plugged in.
>
>
>
> Could you tell us it whether it's the input or the output?
>
> Right now it's plugged into the output.
>
>
>
> Best
>
> Anu
>
>
>
> On Tue, 26 Jan 2021, 10:57 Anuruddha Rathnayake, <adr4zs at virginia.edu>
> wrote:
>
> Hi Marc,
>
>
>
> Chuck and I started flowing N2 gas through the lines labeled as 1,2,3, and
> 4.
>
> We are purging the system with each flow meter set to 250 cc/min.
>
>
>
> I'll be here until noon if you want to test the system or I can be back
> aroun 2:30 pm to test the readback.
>
>
>
> Best
>
> Anu
>
>
>
> On Mon, 25 Jan 2021, 13:20 Marc Mcmullen, <mcmullen at jlab.org> wrote:
>
> Thanks Anu,
>
>
>
> After everything is connected and gas is flowing please send an email to
> the  dsg-halla_gem at jlab.org  mailing list. Once we can verify that
> everything is flowing, I would like to test readback, by changing the flow
> meter settings in steps. I'll send you some step values when you are
> available to run some tests.
>
>
>
> Regards,
>
> Marc
>
> *From:* Anuruddha Rathnayake <adr4zs at virginia.edu>
> *Sent:* Monday, January 25, 2021 1:12 PM
> *To:* Liyanage, Nilanga K (nl8n) <nl8n at virginia.edu>
> *Cc:* Marc Mcmullen <mcmullen at jlab.org>; dsg-halla_gem at jlab.org <
> dsg-halla_gem at jlab.org>; Jeffas, Sean (sj9ry) <sj9ry at virginia.edu>
> *Subject:* Re: [Dsg-halla_gem] [EXTERNAL] Re: Prototype gas distribution
> system
>
>
>
> Hi Marc and Nilanga,
>
> Thank you very much. I'll get it connected asap.
>
> Best
>
> Anu
>
>
>
>
>
> On Mon, Jan 25, 2021 at 12:56 PM Liyanage, Nilanga K (nl8n) <
> nl8n at virginia.edu> wrote:
>
> Hi Marc
>
>
>
> Thanks for taking care of the issues in the gas system.
>
>
>
> Anu: I suggest that you (with help from Chuck as needed) reconnect the GEM
> layer to the prototype panel.
>
>
>
> Best
>
>
>
> Nilanga
>
> *From:* Dsg-halla_gem <dsg-halla_gem-bounces at jlab.org> on behalf of Marc
> Mcmullen <mcmullen at jlab.org>
> *Sent:* Monday, January 25, 2021 12:31 PM
> *To:* dsg-halla_gem at jlab.org <dsg-halla_gem at jlab.org>
> *Subject:* [Dsg-halla_gem] Prototype gas distribution system
>
>
>
> Hi Chuck, Anu, and Jack
>
>
>
> George has returned the regulator panel to the TEDF and connected the four
> channels not currently in use. He has replaced the faulty regulator, and
> all the gas lines are now polyethylene.  Would it be possible to connect
> the system back up as designed. This would require:
>
>    - The four channels supplying the UVA GEM should be disconnected from
>    the output of the four 500 sccm flow meters and connected to the standard
>    flow channels of the gas flow sensor chassis, on the back of the rack
>    (chassis front), these channels are labeled "Std Flow" (1 to 4)
>
>
>
>    - Four 1/4"  gas lines should be connected from the manifold on the
>    DSG designed regulator panel to connect to the input of the four 500 sccm
>    flow meter, and the supply line from the gas bottle should be connected to
>    the input fitting on the regulator panel.
>
>
>
>
>
>    - The output of the 500 sccm flow meters should be connected to the
>    corresponding inputs on the back of the Gas Flow Sensor chassis input (back
>    of the chassis), these are labeled "Std Flow" (1 to 4)
>
>
>
> Once connected and flow has been reestablished, remote monitoring can be
> done by using this link:
>
>
>
> Prototype GEM WEDM page
> <https://epicsweb.jlab.org/wedm/screen?edl=%2fcs%2fopshome%2fedm%2fdsg%2fGEM_text.edl>
>
>
>
> Using this link only requires your jlab username and cue password, it can
> even be viewed from a smartphone. Please let me know when you are able
> reconnect the system, I will ensure the monitoring software is on.
> Currently, it is running.
>
>
>
> Regards,
>
> Marc
>
>
>
>
>
>
>
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