[Dsg-rich] RICH N2 panel flow test

Wed Jul 18 17:07:51 EDT 2018

Hi Tyler,

We will install this early next week.  

We disconnected some RICH cables to install the LTCCs, so we would like someone to check the RICH early next also to verify the proper cable connections.  I will let you know when the RICH cables are connected.

Regards,
Bob 

----- Original Message -----
From: "Tyler Lemon" <tlemon at jlab.org>
To: "dsg-rich" <dsg-rich at jlab.org>
Cc: "Denny Insley" <dinsley at jlab.org>, "David Kashy" <kashy at jlab.org>, "Bob Miller" <rmiller at jlab.org>
Sent: Wednesday, July 18, 2018 3:53:34 PM
Subject: Re: [Dsg-rich] RICH N2 panel flow test

Hello, 

As George mentioned in his email below from Monday, he completed the full-scale flow test for the upgraded RICH nitrogen panel. In the Hall B Gas Shed, he was able to achieve ~60 slm flow on both channels for a total of ~120 slm for the entire panel. By George's experience, he anticipates that the flow we will be able to get in Hall B on the forward carriage will be ~ 40 slm per channel (~80 slm total) because of the back pressure caused by the supply line between the dewar and hall. 

At this point, the panel is ready to be installed on the Forward Carriage. After it is moved into place, the old panel can be removed and the upgraded panel connected in its place in a few minutes to prevent any long stoppage of nitrogen flow. After the panel is installed, DSG will run a cable for the new pressure transducer on the panel and also make the required changes to the LabVIEW hardware interlock system. 

In addition to the upgraded panel, DSG has ready an easidew hygrometer to measure the water concentration of RICH's nitrogen volume. This sensor will be place on one of RICH's nitrogen exhaust lines. For its installation, DSG will run a cable from the hygrometer to the N2 Vol cRIO for monitoring. 

Best regards, 
Tyler 

From: "George Jacobs" <jacobsg at jlab.org> 
To: "Denny Insley" <dinsley at jlab.org>, "Tyler Lemon" <tlemon at jlab.org> 
Cc: "Dave Kashy" <kashy at jlab.org>, "Robert Miller" <rmiller at jlab.org>, "dsg-rich" <dsg-rich at jlab.org> 
Sent: Monday, July 16, 2018 10:20:39 AM 
Subject: Re: [Dsg-rich] RICH N2 panel flow test 

Hi All, 

The new RICH N2 purge supply panel was connected to the 96B gas shed N2 supply to verify proper gas flow. N2 gas supply pressure is 35 psi. 

Using both 0-60 slm capacity flow meters at the same time, flows > 60 slm per channel were achieved with the pressure regulator output as low as 5 psi. 

Thanks, 
George 

On 7/13/2018 1:01 PM, Denny Insley wrote: 

Good afternoon 

The panel is now in the gas shed. Contact 
Todd Ewing when your ready to start hooking it up. 

Thanks 
Denny 

Sent from my iPhone 

On Jul 13, 2018, at 12:01 PM, Tyler Lemon < tlemon at jlab.org > wrote: 

BQ_BEGIN

Hi Dave, 

Thank you for checking the panel. 

Once the panel is moved, DSG will set up the test, following your instruction to pipe the flow outside. 

Best regards, 
Tyler 

From: "Dave Kashy" < kashy at jlab.org > 
To: "Robert Miller" < rmiller at jlab.org >, "Denny Insley" < dinsley at jlab.org > 
Cc: "Tyler Lemon" < tlemon at jlab.org >, "dsg-rich" < dsg-rich at jlab.org >, "George Jacobs" < jacobsg at jlab.org > 
Sent: Friday, July 13, 2018 8:26:49 AM 
Subject: Re: [Dsg-rich] RICH gas system updates 

Hi Bob and Denny, 
George borrowed our gauge and tightened the fittings on the gas panel. This morning I checked them all and found 1 that I tigtened 1/4 turn more. They are all now properly set and verified proper compression using the Swagelock gage. Please transport the panel out to the gas shed. I think it should be put it inside. The DSG folks will then make some temporary connections to do the flow tests on it. They should pipe the exhaust out of the shed or have the overhead door full open while testing and remove all temporary tubing before closing the overhead door. 

Dave 

----- Original Message ----- 
From: "George Jacobs" < jacobsg at jlab.org > 
To: "kashy" < kashy at jlab.org >, "Tyler Lemon" < tlemon at jlab.org > 
Cc: "dsg-rich" < dsg-rich at jlab.org >, "Robert Miller" < rmiller at jlab.org > 
Sent: Wednesday, July 11, 2018 5:14:19 PM 
Subject: Re: [Dsg-rich] RICH gas system updates 

Hi Dave, 

I will pick up the gauge in the morning. 

Please find attached diagram of proposed N2 valve panel flow test configuration. This uses one of the N2 utility connections in 96B as the gas supply. 

Thanks, 
George 

On 7/11/2018 4:00 PM, Dave Kashy wrote: 

Tyler, 
In order to save time I have a fitting gage on my desk. 
You or someone else can come over to borrow it. Please return it upon finishing the work. 

Thanks 
Dave 

----- Original Message ----- 
From: "Tyler Lemon" < tlemon at jlab.org > To: "dsg-rich" < dsg-rich at jlab.org > , "kashy" < kashy at jlab.org > , "Robert Miller" < rmiller at jlab.org > Sent: Wednesday, July 11, 2018 3:57:37 PM 
Subject: RICH gas system updates 

Hello, 

In regards to the upgraded RICH N2 panel and the email this morning, George has ordered a Swagelok gauge for ensuring the fittings are properly tightened. Once he receives the gauge, we will check the panel and tighten the necessary connections. After the panel is checked, the panel will be moved over to the Hall B Gas Shed for the full-scale flow test. DSG will need assistance from Hall B Engineering to move the panel as we do not have the transportation equipment necessary. Before the full-scale flow test, George will generate a diagram showing the panel connected to the nitrogen supply line. 

DSG also has on hand a Easidew moisture transducer and fittings that will allow the transducer to be connected to RICH's nitrogen exhaust line. This moisture transducer is on RICH and is not part of the RICH pressure transducer. It is separate from the nitrogen panel upgrade. Installation of the moisture transducer would not take long. The plan is to get all parts ready, remove the existing gas line, and quickly install the moisture transducer to limit the chances moisture enters RICH. This sensor will be read by RICH's N2 cRIO and will only be monitored; no interlocks will be on the sensor. 

If there are any questions on the nitrogen panel upgrade or the Easidew moisture transducer, please let us know. 

Best regards, 
Tyler 
_______________________________________________ 
Dsg-rich mailing list Dsg-rich at jlab.org https://mailman.jlab.org/mailman/listinfo/dsg-rich 

-- 
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 

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