[dsg-hallb_rich] [EXTERNAL] Re: RICH Humidity sensors

[Tyler Lemon]

What all of the sensors are reading are consistent with how they've behaved in the past.

I am confident that the humidity in the both S1 and S4 nitrogen volumes are essentially 0% RH. Both sectors are flowing ~40 slm nitrogen and are over-pressured slightly.

>From what I remember, the S4 electronic panel is not well sealed between the electronic panel volume and nitrogen volume, so there is leakage between the two areas. Since the airflow is not on, "over-pressuring" from the airflow in the electronic panel with respect to the nitrogen volume is not happening and nitrogen can essentially flow from the N2 volume in to the electronic panel. This will lower bring the humidity in the electronic panel down.

But with that, I'll still check the S4 electronic panel humidity sensor to verify.

-Tyler

________________________________
From: Marco Mirazita <Marco.Mirazita at lnf.infn.it>
Sent: Friday, December 2, 2022 10:48 AM
To: Tyler Lemon <tlemon at jlab.org>
Cc: Valery Kubarovsky <vpk at jlab.org>; dsg-hallb_rich at jlab.org <dsg-hallb_rich at jlab.org>
Subject: [EXTERNAL] Re: [dsg-hallb_rich] RICH Humidity sensors

Hi Tyler,
in principle it is ok to have zero RH inside the detector.
But with the compressor off the humidity inside the electronic panel
cannot be zero because that volume is basically open to the outside air.
I would expect to see values well above few percent, like for the other
module.
And the fact that the sensors read zero in the electronic panel makes
suspicious also the zero readout inside the detector.
Could you please check what is going on?
Thank you,
Marco


Il 2022-12-01 18:45 Tyler Lemon via dsg-hallb_rich ha scritto:
> Valery,
>
>  The humidity in both RICH sectors in the electronic panel and
> nitrogen panel is consistent with what it's been in the past.
>
>  The humidity in the detectors is so low, the sensors cannot read
> anything. This is why most of them are 0% RH or very close to zero.
>
>  -Tyler
>
> -------------------------
>
> From: Valery Kubarovsky <vpk at jlab.org>
> Sent: Thursday, December 1, 2022 12:31 PM
> To: Tyler Lemon <tlemon at jlab.org>
> Cc: Valery Kubarovsky <vpk at jlab.org>
> Subject: RICH Humidity sensors
>
> Hi Tyler,
>
> The RICH detector is off now due to the compressor maintenance.
> Could you please take a look to the humidity sensors in sector 4
> (electronic panel)
> and sector 1 (nitrogen volume)?
>
> Thanks,
> Valery
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> dsg-hallb_rich at jlab.org
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