[dsg-hallb_rich] Hardware interlock problem

[Valery Kubarovsky]

Hi Tyler,
Please plan to fix the RICH hardware interlock issue this coming Wednesday.I will inform you if there is a chance to complete this task earlier.
Thank you,
Valery

________________________________
From: Tyler Lemon <tlemon at jlab.org>
Sent: Monday, June 2, 2025 09:53
To: Valery Kubarovsky via dsg-hallb_rich <dsg-hallb_rich at jlab.org>; Valery Kubarovsky <vpk at jlab.org>
Cc: Nathan Baltzell <baltzell at jlab.org>; Christopher Dilks <dilks at jlab.org>
Subject: Re: Hardware interlock problem

Hi,

Following up on the S4 humidity sensors:

It turns out I'm not able to connect to the expert LabVIEW cRIO user interface for some reason, so I can't say for certain the cause of the humidity sensor read out problem or what the solution would be.

Since through EPICS, everything else besides the humidity sensors are working correctly, the two most likely causes are the 5 V power supply for the humidity sensors failed or the cRIO module reading the humidity sensors failed.

In either case, the solution is swapping in a new power supply or module.
The accelerator whiteboard shows a maintenance day on Wednesday 6/4, so I will plan to go down to the hall and take a look in person then.

-Tyler
________________________________
From: Tyler Lemon <tlemon at jlab.org>
Sent: Sunday, June 1, 2025 7:38 PM
To: Valery Kubarovsky via dsg-hallb_rich <dsg-hallb_rich at jlab.org>; Valery Kubarovsky <vpk at jlab.org>; Tyler Lemon <tlemon at jlab.org>
Cc: Nathan Baltzell <baltzell at jlab.org>; Christopher Dilks <dilks at jlab.org>
Subject: Re: Hardware interlock problem


Besides the S4 humidity sensors, everything else looks fine.
I am confident that the detector is still getting N2 flow based on the readings from the nitrogen flow meter and nitrogen supply panel pressures (circled in blue on attached).

Since it's just the humidity sensors that stopped suddenly, I suspect that the 5 V power supply in the cRIO chassis powering the humidity sensors died. I'm not able to connect to the monitoring screen to verify this (LabVIEW is loading really slowly) but will try again from my office tomorrow morning.

Since everything else with that cRIO looks fine, it can probably wait until the next maintenance day to replace the power supply or investigate further in the hall if needed.

-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: Sunday, June 1, 2025 6:58 PM
To: Valery Kubarovsky via dsg-hallb_rich <dsg-hallb_rich at jlab.org>; Valery Kubarovsky <vpk at jlab.org>
Cc: Nathan Baltzell <baltzell at jlab.org>; Christopher Dilks <dilks at jlab.org>
Subject: Re: [dsg-hallb_rich] Hardware interlock problem

I'll take a look.
-Tyler


________________________________
From: dsg-hallb_rich <dsg-hallb_rich-bounces at jlab.org> on behalf of Valery Kubarovsky via dsg-hallb_rich <dsg-hallb_rich at jlab.org>
Sent: Sunday, June 1, 2025 6:53 PM
To: Valery Kubarovsky via dsg-hallb_rich <dsg-hallb_rich at jlab.org>
Cc: Nathan Baltzell <baltzell at jlab.org>; Christopher Dilks <dilks at jlab.org>
Subject: [dsg-hallb_rich] Hardware interlock problem

Hi Tyler,
We got a problem with the humidity sensors in the N2 volume of sector 4:
https://logbooks.jlab.org/entry/4388414
Please take a look as soon as possible and let us know how to fix this problem.
Regards,
Valery

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