[Dsg-rtpc] [New Comment] MFC104 seems flaky

[Brian Eng]

I will start on setting up something that can from the same computer that has been used to control the target gas from. I'll need to login to test at some point, so if someone is logged in they'll temporarily be disconnected.

Note that because of the various orifices the flow rate even at 100% open will only be ~330 (with N2), so I don't think you'll see a factor of 2 decrease in time.
________________________________________
From: Sebastian Kuhn <kuhn at jlab.org>
Sent: Tuesday, March 17, 2020 11:07 AM
To: Brian Eng
Cc: dsg-rtpc at jlab.org; Bob Miller; Eric Christy; JIWAN POUDEL; Mohammad Hattawy; Patrizia Rossi; Amrit Yegneswaran; Marc Mcmullen
Subject: Re: [New Comment] MFC104 seems flaky

Dear all,

while I am still not convinced that MFC104 works properly, we may be able to create a work-around (and leave it in place as is) if Brian can give us detailed instructions how regular (BONuS12) users can change the valve setting on that MFC manually. In other words, if we can somehow force the valve to open 100% irrespective of the flow rate readback, we can speed up the filling by roughly a factor of 2. I am willing to write detailed operation instructions for the RTPC experts on duty to optimize the filling of the target once that information is available.