[dsg-hallb_rich] RICH cRio sector 1 disconnected

[Valery Kubarovsky]

Hi Tyler,
Do you have any indications that the we have network problem in the Hall?
The situation with the RICH interlock is still the same.
Best regards,
Valery
________________________________
From: Tyler Lemon <tlemon at jlab.org>
Sent: Friday, December 12, 2025 12:01
To: Valery Kubarovsky <vpk at jlab.org>; tlemon--- via dsg-hallb_rich <dsg-hallb_rich at jlab.org>
Subject: Re: RICH cRio sector 1 disconnected

Hi Valery,

Everything with the crios in the hall are okay and I see that both RICH sectors are getting about 40slm of nitrogen flow still.

It looks like the disconnect problem is an overall network problem.
Hopefully when they’re done with the work effecting the network, everything will come back as normal.

-Tyler

________________________________
From: dsg-hallb_rich <dsg-hallb_rich-bounces at jlab.org> on behalf of Tyler Lemon via dsg-hallb_rich <dsg-hallb_rich at jlab.org>
Sent: Friday, December 12, 2025 10:33:29 AM
To: Valery Kubarovsky <vpk at jlab.org>; tlemon--- via dsg-hallb_rich <dsg-hallb_rich at jlab.org>
Subject: Re: [dsg-hallb_rich] RICH cRio sector 1 disconnected

Hi Valery,

If I had to guess, it looks like there might be a network problem in the hall.

I cannot connect to any RICH cRIOs and there's also been a similar problem with some of the Hall B gas system cRIOs.

I'll go down to the hall today and verify that the cRIOs are still running okay and it's not something else.

-Tyler
________________________________
From: Valery Kubarovsky <vpk at jlab.org>
Sent: Friday, December 12, 2025 9:50 AM
To: Tyler Lemon <tlemon at jlab.org>; tlemon--- via dsg-hallb_rich <dsg-hallb_rich at jlab.org>
Cc: Valery Kubarovsky <vpk at jlab.org>
Subject: RICH cRio sector 1 disconnected

Hi Tyler,
RICH cRio sector 1 is disconnected. Could you please take a look and let me know what is going on?
Thank you,
Valery
________________________________
From: Tyler Lemon <tlemon at jlab.org>
Sent: Friday, November 14, 2025 11:54
To: tlemon--- via dsg-hallb_rich <dsg-hallb_rich at jlab.org>
Cc: Valery Kubarovsky <vpk at jlab.org>; Patrizia Rossi <rossi at jlab.org>
Subject: RICH S1 hardware interlocks rebooted - all normal

Hi Valery,

I went down to Hall B and rebooted the RICH S1 hardware interlock cRIO.
Upon reboot, the N2 flow reading was restored and is operational.
Please check that all of the interlock limits are correct.


I also took a photo of the RICH nitrogen panel (attached). In the photo, you can clearly see that both sectors are getting about 40 liters per minute of N2 flow.
You can also see in the photo that the panel has several white, tags attached to the valves and rotameters.
These are administrative lock out tags that Bob Miller placed on the panel stating to not operate the item. This even more reinforcement that RICH detector N2 flow not remotely controllable and will only be stopped if someone purposefully ignores the administrative lockout tags to turn off flow.

Also, while down in the hall, I swapped read out ports for humidity sensor 1 & 2 (EP sensors) with humidity sensor 25 & 26 (N2 volume sensors).
When I did this, the reading for H1 & H2 moved to H25 & H26 and vice versa.
This shows that the zero humidity readings in the N2 volume are because the humidity is so low that it is below the sensor's measurement range, not that the sensor or readout channels are not working.
If needed, I can meet you in the hall one day next week so you can see this for yourself.

-Tyler


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