[Dsg-ltcc] LTCC gas flow

[Marc Mcmullen]

Hi Mauri,

It looks like Bob is filling the sectors, they were around 1.6 iwc earlier. He has the low set points set to 2.1 iwc, so it will fill to 2.2 because of the 0.1 iwc dead band.

Although the system is currently running, he only opens the manual valve which will allow gas to flow into the detectors during working hours. You should probably contact Bob for more details.  He can probably help out with determining the EPICS alarm set points.

-Marc
________________________________
From: Dsg-ltcc <dsg-ltcc-bounces at jlab.org> on behalf of Maurizio Ungaro <ungaro at jlab.org>
Sent: Monday, February 18, 2019 1:17 PM
To: Dsg-ltcc at jlab.org
Subject: [Dsg-ltcc] LTCC gas flow

Hi Marc,

Looks like we have a quite high gas flow in both sectors currently. Sector 5 has 1lpm that is also triggering a minor alarm.

I notice that the sector pressure is increasing overall. For sector 3, once it reached 2.149 wc the flow stopped. If this is normal and it will happen for s5 also, we may want to increase the alarm limit to 1.5lpm for s5 as well?

Thanks,

Mauri
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