[Dsg-mvt] MVT gas mixing electronics/network equipment

[Matthew Marchlik]

Hi Marc,

I met with Walt Akers, Tim Minga and Paul Powers this morning to discuss installation of the system into 96B. The consensus is that there is not way to modify the shed for flammable gas service without spending significant time and money. Installing into 96C, hall C's gas shed, was also discussed but would not work out.

So, the mixing system and gas supply bottles will be installed on the gas pad. Could you please reply to this email and list the items/steps necessary for installation from DSG's standpoint we discussed yesterday?

Hall B will create a small insulated foam box to house the MFCs with a segment of directly controlled heat tape within to keep the temperature above 50F. It will have holes for the cables. Is there any need to regularly access the MFCs after commissioning?

The C4H10 line from the bottle to the MFCs will need to be wrapped with insulation and heat tape set to 90F, same as the bottle blanket. (George, can this be powered/controlled in series with the heater blanket?)

Hall B and I will update all of the PS documentation, drawings, models and P&IDs.

Thanks,
Matt


----- Original Message -----
From: "Marc McMullen" <mcmullen at jlab.org>
To: "Matthew Marchlik" <marchlik at jlab.org>, "Bob Miller" <rmiller at jlab.org>, dsg-mvt at jlab.org
Sent: Wednesday, September 6, 2017 3:53:29 PM
Subject: MVT gas mixing electronics/network equipment

Hi Matt and Bob,

Is there a firm plan on the location of the MVT mixing instrumentation, 
electronics, and network equipment. If the equipment cannot be located 
in the Hall, I understand that the gas pad may be the next logical 
choice. The instrumentation which will have to be at the gas panel are 
the MFCs, which are temperature sensitive. The MFCs communicate via the 
network, so under normal circumstances we would like to have a switch at 
the location. We would also like to put the power for the MFCs (a 
chassis containing a power supply) in that location if possible. To 
house all of these components, may require large enclosure, or rack 
which can be enclosed and climate controlled to keep all components 
running and in good shape for the long run. At any rate, please let us 
(DSG) know as soon as a decision is made, so that we can plan accordingly.


Thanks,

-- 
Marc McMullen
Detector Support Group
757-269-7738