[Dsg-rich] [EXTERNAL] Re: AirFlow1 problem

[Bob Miller]

Hi All,


While the hall was open, I did an inspection in the hall and noticed the 
RICH air flow was high.  I adjusted the pressure regulators to return to 
450 lpm, and 270 lpm.


I will go back to the Hall and check them again.


Regards,

Bob



On 3/3/2020 2:10 PM, Tyler Lemon wrote:
> Valery,
>
> If we temporarily stop all airflow to RICH and let pressure in the 
> tank build to where it stops, and then restart flow, it might return 
> the flow to normal.
>
> If we do this, RICH would need to be powered off.
>
> Can you turn RICH off so this can be done?
>
> It would need to be done as soon as possible since the hall is getting 
> ready to get beam.
>
> Tyler
> ------------------------------------------------------------------------
> *From:* Dsg-rich <dsg-rich-bounces at jlab.org> on behalf of Tyler Lemon 
> <tlemon at jlab.org>
> *Sent:* Tuesday, March 3, 2020 2:01 PM
> *To:* Marco Mirazita <Marco.Mirazita at lnf.infn.it>; Valery Kubarovsky 
> <vpk at jlab.org>; Bob Miller <rmiller at jlab.org>
> *Cc:* dsg-rich <dsg-rich at jlab.org>
> *Subject:* Re: [Dsg-rich] [EXTERNAL] Re: AirFlow1 problem
> Hi Valery and Marco
>
> It looks like right before the lower airflow 1 reading, the buffer 
> tank pressure did not reach the same upper pressure and also went to a 
> lower pressure than usual. This is in the red box in the attachment. 
> The drop in air flow is probably due to the system trying to catch up 
> and get back to the normal operating pressure.
>
> What is the status of the other RICH compressor that was removed from 
> the hall? Last I heard Hall B Engineering was looking into repairing it.
>
> Best regards,
> Tyler
>
>
> ------------------------------------------------------------------------
> *From:* Marco Mirazita <Marco.Mirazita at lnf.infn.it>
> *Sent:* Tuesday, March 3, 2020 1:57 PM
> *To:* Valery Kubarovsky <vpk at jlab.org>
> *Cc:* Tyler Lemon <tlemon at jlab.org>; dsg-rich <dsg-rich at jlab.org>
> *Subject:* [EXTERNAL] Re: [Dsg-rich] AirFlow1 problem
> The average flow is reduced and the temperature of the FPGA is
> increasing.
> This could be potentially dangerous, if the temperature keeps going up
> we could reach the interlock limit.
> Marco
>
>
> Il 2020-03-03 13:41 Valery Kubarovsky ha scritto:
> > Hi Tyler,
> >
> >  I got an alarm AirFlow1
> >
> >  PV: B_DET_RICH_INTLK_AIRFLOW1 - Description: MINOR alarm:
> > B_DET_RICH_INTLK_AIRFLOW1 - Alarm Time: 2020/03/03 13:24:47.458 -
> > Current Severity: MINOR - Current Status: LOW_ALARM - Alarm Severity:
> > MAJOR - Alarm Status: LOLO_ALARM - Alarm Value: 394.37678458612845
> >
> >  Could you please take a look?
> >  Probably we have a problem with the airflow sensor.
> >
> >  Thanks,
> >  Valery
> >
> >
> > _______________________________________________
> > Dsg-rich mailing list
> > Dsg-rich at jlab.org
> > https://mailman.jlab.org/mailman/listinfo/dsg-rich

-- 
Bob Miller
Hall B Lead Engineer
Jefferson Lab
757 822-9586

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