[Dsg-ft] Nitrogen pipes

[Morgan Cook]

Hey George,

Do you have an extra rotameter in this range?  The one we're using isn't working properly.  The steel ball sticks inside the tube and is currently stuck at the top on the scale.  The transducer reads 330 sccm no matter how small I open the rotameter.  

Thanks,
Morgan

----- Original Message -----

In order for the flow transducer to perform it's purpose, it must be downstream of the rotameter. Just move the transducer to the rotameter location. It has a pretty long cable. 

On 7/17/2017 7:12 PM, Raffaella De Vita wrote: 


Hi George, 
we have re-discussed the positioning of the different components of the FTCal gas system with Bob and Morgan, who is helping us with the installation. Their suggestion was to possibly keep everything on the subway, pacing the rotometer close to the other ones already installed and the bubbler in the bubbler tray with the other ones. Could we move the flowmeter upstairs as well: I thought that was not going to be possible but we check the cable from the cRio to the device and that looks long enough. 
If you are available we could meet to discuss it: we will be in the Hall most of the day tomorrow working on cabling. 
Best regards, 
Raffaella 

Raffaella De Vita wrote: 

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Hi George, 
thanks for pointing out that the rotometer has to be upstream. I guess this was not considered when the new configuration was discussed and the idea of moving rotometer and bubbler on the subway was just for convenience. However we can go back to the original idea of having everything close to the compact rio. We will revisit the plan and get back to you on Monday. 
Regards, 
Raffaella 

George Jacobs wrote: 

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The flow control rotameter should be upstream of the transducer if your concerened with accurate transducer readback. It could be right next to it, The flow control rotometer must be in the vertical position. Have you discussed these changes with the DA? 

George 

On 07/14/2017 02:54 PM, Raffaella De Vita wrote: 

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Hi George, 
plans about the panel have changed a bit: it was decided to install rotometer and bubbler close to the detector on the subway, leaving the flowmeter close the compact rio since I believe it gets power from the compact rio. 
Thanks, 
Raffaella 

George Jacobs wrote: 

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I can hook it up and make a temporary mount of some sort. I thought the FT group was working on a N2 panel? 

On 7/14/2017 9:07 AM, Amanda Hoebel wrote: 

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Hi George,

Could you connect and mount the FT flow meter today?

Thanks,
Amanda

----- Original Message -----
From: "raffaella devita" <Raffaella.Devita at ge.infn.it> To: "Amanda Hoebel" <amandah at jlab.org> Cc: "dsg-ft" <dsg-ft at jlab.org> Sent: Friday, July 14, 2017 8:54:23 AM
Subject: Nitrogen pipes

Hi Amanda,
We have installed the nitrogen lines for the ftcal purge. The still have to be connected to the main line in the hall but they are ready to be connected to the flow meter. Will you take care of that?
Also, the flow meter is now sitting on the floor but it would be nice to have a small panel to attach it to the rack . Would that be possible?
Thanks ,
Raffaella 



-- 
George Jacobs
Jefferson Lab (TJNAF)
STE 12
12000 Jefferson Ave.
Newport News, VA 23606

(office) 757-269-7115

(cell)   757-876-0480

(email) jacobsg at jlab.org (website) https://userweb.jlab.org/~jacobsg 


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-- 
George Jacobs
Physics Detector Support Group
Jefferson Lab (TJNAF)
STE 12
12000 Jefferson Ave.
Newport News, VA 23606

(office) 757-269-7115

(cell)   757-876-0480

(email) jacobsg at jlab.org (website) https://userweb.jlab.org/~jacobsg 

BQ_END


BQ_END


BQ_END

-- 
George Jacobs
Jefferson Lab (TJNAF)
STE 12
12000 Jefferson Ave.
Newport News, VA 23606

(office) 757-269-7115

(cell)   757-876-0480

(email) jacobsg at jlab.org (website) https://userweb.jlab.org/~jacobsg