[Dsg-rich] RICH N2 interlock, compressor settings question for Bob Miller

[Valery Kubarovsky]

The N2 flow hardware interlock is disabled intentionally.
We don’t need to shut down the detector if the N2 flow is low.
We need only alarm

We are looking for the AIRPR1 behavior. For a moment the minor alarm was set to 55 psi.
The air flow and temperatures are OK.


From: Dsg-rich <dsg-rich-bounces at jlab.org> on behalf of Tyler Lemon <tlemon at jlab.org>
Date: Monday, January 6, 2020 at 9:13 AM
To: dsg-rich <dsg-rich at jlab.org>, Bob Miller <rmiller at jlab.org>
Subject: [Dsg-rich] RICH N2 interlock, compressor settings question for Bob Miller


Hello,

This morning when reviewing the RICH status we noticed that the N2 flow hardware interlock is disabled. Is this intentional?

There is still an alarm on the N2 flow so Hall B will still be notified on N2 flow loss, but the hardware interlock system will take no action.

We also noticed that the air pressure in the cooling tank is periodically giving a minor alarm. Were these alarm limits ever updated after the compressor optimization?


Bob,
Before the shutdown you were looking at the compressor on-off pressure settings. Were these settings returned to what Sandro and Dario set them at during the compressor optimization when the compressor was turned back on on Sunday?


Best regards,
Tyler
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