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<p>Hi All,</p>
<p><br>
</p>
<p>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.</p>
<p><br>
</p>
<p>I will go back to the Hall and check them again.</p>
<p><br>
</p>
<p>Regards,</p>
<p>Bob</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 3/3/2020 2:10 PM, Tyler Lemon wrote:<br>
</div>
<blockquote type="cite"
cite="mid:MN2PR09MB3582275C67118C9C27D36E85BAE40@MN2PR09MB3582.namprd09.prod.outlook.com">
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Valery,</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
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<br>
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<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);">
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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<br>
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<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
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If we do this, RICH would need to be powered off.</div>
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<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
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Can you turn RICH off so this can be done?</div>
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<br>
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It would need to be done as soon as possible since the hall is
getting ready to get beam.
<br>
</div>
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<br>
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<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);">
Tyler<br>
</div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
face="Calibri, sans-serif" color="#000000"><b>From:</b>
Dsg-rich <a class="moz-txt-link-rfc2396E" href="mailto:dsg-rich-bounces@jlab.org"><dsg-rich-bounces@jlab.org></a> on behalf of Tyler
Lemon <a class="moz-txt-link-rfc2396E" href="mailto:tlemon@jlab.org"><tlemon@jlab.org></a><br>
<b>Sent:</b> Tuesday, March 3, 2020 2:01 PM<br>
<b>To:</b> Marco Mirazita <a class="moz-txt-link-rfc2396E" href="mailto:Marco.Mirazita@lnf.infn.it"><Marco.Mirazita@lnf.infn.it></a>;
Valery Kubarovsky <a class="moz-txt-link-rfc2396E" href="mailto:vpk@jlab.org"><vpk@jlab.org></a>; Bob Miller
<a class="moz-txt-link-rfc2396E" href="mailto:rmiller@jlab.org"><rmiller@jlab.org></a><br>
<b>Cc:</b> dsg-rich <a class="moz-txt-link-rfc2396E" href="mailto:dsg-rich@jlab.org"><dsg-rich@jlab.org></a><br>
<b>Subject:</b> Re: [Dsg-rich] [EXTERNAL] Re: AirFlow1 problem</font>
<div> </div>
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<div style="font-family:Calibri,Arial,Helvetica,sans-serif;
font-size:12pt">Hi Valery and Marco<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;
font-size:12pt"><br>
</div>
<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>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;
font-size:12pt"><br>
</div>
<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>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;
font-size:12pt"><br>
</div>
<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>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;
font-size:12pt"><br>
</div>
<br>
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<hr tabindex="-1" style="display:inline-block; width:98%">
<div id="x_divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
face="Calibri, sans-serif" color="#000000"><b>From:</b>
Marco Mirazita <a class="moz-txt-link-rfc2396E" href="mailto:Marco.Mirazita@lnf.infn.it"><Marco.Mirazita@lnf.infn.it></a><br>
<b>Sent:</b> Tuesday, March 3, 2020 1:57 PM<br>
<b>To:</b> Valery Kubarovsky <a class="moz-txt-link-rfc2396E" href="mailto:vpk@jlab.org"><vpk@jlab.org></a><br>
<b>Cc:</b> Tyler Lemon <a class="moz-txt-link-rfc2396E" href="mailto:tlemon@jlab.org"><tlemon@jlab.org></a>; dsg-rich
<a class="moz-txt-link-rfc2396E" href="mailto:dsg-rich@jlab.org"><dsg-rich@jlab.org></a><br>
<b>Subject:</b> [EXTERNAL] Re: [Dsg-rich] AirFlow1 problem</font>
<div> </div>
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<div class="x_BodyFragment"><font size="2"><span
style="font-size:11pt">
<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>
<br>
<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>
> _______________________________________________<br>
> Dsg-rich mailing list<br>
> <a class="moz-txt-link-abbreviated" href="mailto:Dsg-rich@jlab.org">Dsg-rich@jlab.org</a><br>
> <a
href="https://mailman.jlab.org/mailman/listinfo/dsg-rich"
moz-do-not-send="true">https://mailman.jlab.org/mailman/listinfo/dsg-rich</a></div>
</span></font></div>
</div>
</blockquote>
<pre class="moz-signature" cols="72">--
Bob Miller
Hall B Lead Engineer
Jefferson Lab
757 822-9586
</pre>
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