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Narbe,</div>
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Thanks for the information. I will discuss this with the DSG group. As far as alarms are concerned all of the monitored data from the transducers, RTDs, and flow controllers will be forwarded to the Hall B EPICS alarm handler (Nathan will take it from there). </div>
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I will get back to you shortly with an explanation of the software process, we should probably meet again right after I send you our proposed solution.</div>
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Hopefully, at that point Mohammad will have some target details and we can cover a lot of ground during the meeting. </div>
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Thanks,</div>
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Marc</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Narbe Kalantarians<br>
<b>Sent:</b> Thursday, February 14, 2019 11:12 AM<br>
<b>To:</b> Marc Mcmullen<br>
<b>Cc:</b> dsg-rtpc@jlab.org<br>
<b>Subject:</b> Re: RTPC Gas Controls Meeting Minutes</font>
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<div class="" style="word-wrap:break-word">Guess it got collapsed somehow.
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<div class="">I know that item 1 is already going to be take care of.<br class="">
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<div class="">1) Obviously we need to log all of the monitored quantities (temperatures, pressures and gas flows) in the CLAS12 data stream.<br class="">
<br class="">
2) There should be a feedback loop that regulates the gas flow to keep the pressure inside the RTPC at a fixed value (set by the operator from an EPICS screen)<br class="">
<br class="">
3) There should be programmable alarm levels (both hi and lo) on all pressures and the gas flow, including the supply pressure (e.g. when the bottle gets close to being empty)<br class="">
<br class="">
4) Drift gas should ONLY be shut off if there is a sudden increase in gas flow indicating a rupture somewhere<br class="">
<br class="">
5) In the case of 4) or if the gas flow / pressure sink BELOW an adjustable level, the HV should be shut down (not the gas flow). This is to prevent sparks if ambient air can enter due to a rupture or due to empty supply bottles<br class="">
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<div class=""><b class="">Narbe Kalantarians, Ph. D.</b></div>
<div class="">
<div class="">Assistant Professor of Physics</div>
<div class="">Virginia Union University, Dept. of Natural Sciences </div>
<div class="">+1-804-257-5617 (VUU)</div>
<div class="">+1-757-269-5566 (JLab)</div>
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<div class="">On Feb 14, 2019, at 11:10 AM, Marc Mcmullen <<a href="mailto:mcmullen@jlab.org" class="">mcmullen@jlab.org</a>> wrote:</div>
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Hi Narbe,</div>
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There was no attachment or information on your email.</div>
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Marc</div>
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<font face="Calibri, sans-serif" class="" style="font-size:11pt"><b class="">From:</b><span class="x_Apple-converted-space"> </span>Narbe Kalantarians<br class="">
<b class="">Sent:</b><span class="x_Apple-converted-space"> </span>Thursday, February 14, 2019 11:06 AM<br class="">
<b class="">To:</b><span class="x_Apple-converted-space"> </span>Marc Mcmullen<br class="">
<b class="">Cc:</b><span class="x_Apple-converted-space"> </span><a href="mailto:dsg-rtpc@jlab.org" class="">dsg-rtpc@jlab.org</a><br class="">
<b class="">Subject:</b><span class="x_Apple-converted-space"> </span>Fwd: RTPC Gas Controls Meeting Minutes</font>
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Hi Marc,
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<div class="">Please see below for input for alarms/interlocks re: drift gas system. The ODU group will give (further) input on alarm need for the drift monitoring system.</div>
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<div class="">Also; if Nathan Baltzell isn’t no this mailing list, can you add him?</div>
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<div class="">Thank you.</div>
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<div class="">
<div class=""><b class="">Narbe Kalantarians, Ph. D.</b></div>
<div class="">
<div class="">Assistant Professor of Physics</div>
<div class="">Virginia Union University, Dept. of Natural Sciences </div>
<div class="">+1-804-257-5617 (VUU)</div>
<div class="">+1-757-269-5566 (JLab)</div>
</div>
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<div class="">Begin forwarded message:</div>
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<div class="" style="margin:0px"><span class="" style=""><b class="">From:<span class="x_Apple-converted-space"> </span></b></span><span class="">"Kuhn, Sebastian E." <<a href="mailto:skuhn@odu.edu" class="">skuhn@odu.edu</a>><br class="">
</span></div>
<div class="" style="margin:0px"><span class="" style=""><b class="">Subject:<span class="x_Apple-converted-space"> </span></b></span><span class=""><b class="">Re: RTPC Gas Controls Meeting Minutes</b><br class="">
</span></div>
<div class="" style="margin:0px"><span class="" style=""><b class="">Date:<span class="x_Apple-converted-space"> </span></b></span><span class="">February 13, 2019 at 2:00:41 PM EST<br class="">
</span></div>
<div class="" style="margin:0px"><span class="" style=""><b class="">To:<span class="x_Apple-converted-space"> </span></b></span><span class="">Narbe Kalantarians <<a href="mailto:narbe@jlab.org" class="">narbe@jlab.org</a>><br class="">
</span></div>
<div class="" style="margin:0px"><span class="" style=""><b class="">Cc:<span class="x_Apple-converted-space"> </span></b></span><span class="">"<a href="mailto:christy@jlab.org" class="">christy@jlab.org</a>" <<a href="mailto:christy@jlab.org" class="">christy@jlab.org</a>>,
"Hattawy, Mohammad" <<a href="mailto:mhattawy@odu.edu" class="">mhattawy@odu.edu</a>>, Carlos Ayerbe Gayoso <<a href="mailto:gayoso@jlab.org" class="">gayoso@jlab.org</a>>, "Bueltmann, Stephen L." <<a href="mailto:SBueltma@odu.edu" class="">SBueltma@odu.edu</a>><br class="">
</span></div>
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<div class="">Here are my 5 cents on these questions:<br class="">
<br class="">
1) Obviously we need to log all of the monitored quantities (temperatures, pressures and gas flows) in the CLAS12 data stream.<br class="">
<br class="">
2) There should be a feedback loop that regulates the gas flow to keep the pressure inside the RTPC at a fixed value (set by the operator from an EPICS screen)<br class="">
<br class="">
3) There should be programmable alarm levels (both hi and lo) on all pressures and the gas flow, including the supply pressure (e.g. when the bottle gets close to being empty)<br class="">
<br class="">
4) Drift gas should ONLY be shut off if there is a sudden increase in gas flow indicating a rupture somewhere<br class="">
<br class="">
5) In the case of 4) or if the gas flow / pressure sink BELOW an adjustable level, the HV should be shut down (not the gas flow). This is to prevent sparks if ambient air can enter due to a rupture or due to empty supply bottles<br class="">
<br class="">
Anything else anyone can think of? - Sebastian<br class="">
<br class="">
<blockquote type="cite" class="">On Feb 13, 2019, at 1:06 PM, Narbe Kalantarians <<a href="mailto:narbe@jlab.org" class="">narbe@jlab.org</a>> wrote:<br class="">
<br class="">
Are there any particular details needed for the drift gas system, re: HV/LV failures, other than to shut off the drift gas system?<br class="">
<br class="">
From: Dsg-rtpc <<a href="mailto:dsg-rtpc-bounces@jlab.org" class="">dsg-rtpc-bounces@jlab.org</a>> on behalf of Marc Mcmullen <<a href="mailto:mcmullen@jlab.org" class="">mcmullen@jlab.org</a>><br class="">
Sent: Thursday, February 7, 2019 4:58 PM<br class="">
To:<span class="x_Apple-converted-space"> </span><a href="mailto:dsg-rtpc@jlab.org" class="">dsg-rtpc@jlab.org</a>; Mohammad Hattawy<br class="">
Subject: [Dsg-rtpc] RTPC Gas Controls Meeting Minutes<br class="">
<br class="">
Hi,<br class="">
<br class="">
Attached are the minutes/notes from the meeting with the RTPC/BONuS12 group. The information provided during the meeting has been added to the agenda is in italics.<span class="x_Apple-converted-space"> </span><br class="">
<br class="">
Thanks<br class="">
Marc<br class="">
<RTPC Gas Controls Meeting_020719.docx>_______________________________________________<br class="">
Dsg-rtpc mailing list<br class="">
<a href="mailto:Dsg-rtpc@jlab.org" class="">Dsg-rtpc@jlab.org</a><br class="">
<a href="https://mailman.jlab.org/mailman/listinfo/dsg-rtpc" class="">https://mailman.jlab.org/mailman/listinfo/dsg-rtpc</a></blockquote>
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