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

[Marco Mirazita]

Hi Tyler,
we have sensors from 1 to 4 that are out of the EPanel and they also 
read 0.
Anyhow thank you for looking at it.
Marco


Il 2022-12-02 17:07 Tyler Lemon ha scritto:
> 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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