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Valery,</div>
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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.</div>
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If we do this, RICH would need to be powered off.</div>
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Can you turn RICH off so this can be done?</div>
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It would need to be done as soon as possible since the hall is getting ready to get beam.
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Tyler<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Dsg-rich <dsg-rich-bounces@jlab.org> on behalf of Tyler Lemon <tlemon@jlab.org><br>
<b>Sent:</b> Tuesday, March 3, 2020 2:01 PM<br>
<b>To:</b> Marco Mirazita <Marco.Mirazita@lnf.infn.it>; Valery Kubarovsky <vpk@jlab.org>; Bob Miller <rmiller@jlab.org><br>
<b>Cc:</b> dsg-rich <dsg-rich@jlab.org><br>
<b>Subject:</b> Re: [Dsg-rich] [EXTERNAL] Re: AirFlow1 problem</font>
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<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">Hi Valery and Marco<br>
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<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">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.<br>
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<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">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.</div>
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<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">Best regards,</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt">Tyler<br>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Marco Mirazita <Marco.Mirazita@lnf.infn.it><br>
<b>Sent:</b> Tuesday, March 3, 2020 1:57 PM<br>
<b>To:</b> Valery Kubarovsky <vpk@jlab.org><br>
<b>Cc:</b> Tyler Lemon <tlemon@jlab.org>; dsg-rich <dsg-rich@jlab.org><br>
<b>Subject:</b> [EXTERNAL] Re: [Dsg-rich] AirFlow1 problem</font>
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<div class="x_PlainText">The average flow is reduced and the temperature of the FPGA is
<br>
increasing.<br>
This could be potentially dangerous, if the temperature keeps going up <br>
we could reach the interlock limit.<br>
Marco<br>
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<br>
Il 2020-03-03 13:41 Valery Kubarovsky ha scritto:<br>
> Hi Tyler,<br>
> <br>
> I got an alarm AirFlow1<br>
> <br>
> PV: B_DET_RICH_INTLK_AIRFLOW1 - Description: MINOR alarm:<br>
> B_DET_RICH_INTLK_AIRFLOW1 - Alarm Time: 2020/03/03 13:24:47.458 -<br>
> Current Severity: MINOR - Current Status: LOW_ALARM - Alarm Severity:<br>
> MAJOR - Alarm Status: LOLO_ALARM - Alarm Value: 394.37678458612845<br>
> <br>
> Could you please take a look?<br>
> Probably we have a problem with the airflow sensor.<br>
> <br>
> Thanks,<br>
> Valery<br>
> <br>
> <br>
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