<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">yes, I agree with Amrit.<div class="">Thank you Tyler for the excellent analysis!<br class=""><div apple-content-edited="true" class="">
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<br class=""><div><blockquote type="cite" class=""><div class="">On 18/set/2018, at 14:22, Amrit Yegneswaran <<a href="mailto:yeg@jlab.org" class="">yeg@jlab.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class=""><div style="font-family: tahoma,new york,times,serif; font-size: 14pt; color: #009900" class=""><div class="">thanks for the excellent analysis tyler.<br class=""></div><div class="">this helps us set a baseline and endorses the fact that prior to scheduled work, we have to take appropriate action.<br data-mce-bogus="1" class=""></div><div class="">for instance, the rich detector <span style="text-decoration: underline;" data-mce-style="text-decoration: underline;" class=""><em class="">must have emergency nitrogen in the hall</em></span> to switch to prior to scheduled work.<br data-mce-bogus="1" class=""></div><div class=""><br data-mce-bogus="1" class=""></div><div class="">detectors are like trust,<br data-mce-bogus="1" class=""></div><div class="">takes years to build , seconds to destroy, and forever to repair.<br data-mce-bogus="1" class=""></div><div class=""><br data-mce-bogus="1" class=""></div><div class=""><br data-mce-bogus="1" class=""></div><hr id="zwchr" data-marker="__DIVIDER__" class=""><div data-marker="__HEADERS__" class=""><b class="">From: </b>"Tyler Lemon" <<a href="mailto:tlemon@jlab.org" class="">tlemon@jlab.org</a>><br class=""><b class="">To: </b>"Mirazita Marco" <<a href="mailto:Marco.Mirazita@lnf.infn.it" class="">Marco.Mirazita@lnf.infn.it</a>>, "dsg-rich" <<a href="mailto:dsg-rich@jlab.org" class="">dsg-rich@jlab.org</a>><br class=""><b class="">Cc: </b>"Robert Miller" <<a href="mailto:rmiller@jlab.org" class="">rmiller@jlab.org</a>>, "Denny Insley" <<a href="mailto:dinsley@jlab.org" class="">dinsley@jlab.org</a>><br class=""><b class="">Sent: </b>Tuesday, September 18, 2018 2:09:09 PM<br class=""><b class="">Subject: </b>Re: [Dsg-rich] URGENT: RICH alarm<br class=""></div><div class=""><br class=""></div><div data-marker="__QUOTED_TEXT__" class=""><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;" data-mce-style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000;" class=""><div class="">Hello,<br class=""></div><br class=""><div class="">In addition to the relative humidity sensors, we have the moisture transducer measuring the water concentration at the N2 Exhaust line.<br class=""></div><br class=""><div class="">When N2 flow stopped there was 41.77 ppm of H2O.<br class=""></div><div class="">When N2 flow restarted, water concentration had increased to 46.72 ppm (4.95 ppm, or 11.86% overall, increase).<br class=""></div><div class="">One hour later, water concentration dropped to 44.17 ppm (2.55 ppm, or 5.46% overall, decrease).<br class=""></div><br class=""><div class="">Attached is an updated table with the moisture transducer added in the last row in blue. Also attached is a plot during this time period for the moisture transducer.<br class=""></div><br class=""><div class="">Best regards,<br class=""></div><div class="">Tyler<br class=""></div><hr id="zwchr" class=""><div class=""><b class="">From: </b>"Tyler Lemon" <<a href="mailto:tlemon@jlab.org" class="">tlemon@jlab.org</a>><br class=""><b class="">To: </b>"Mirazita Marco" <<a href="mailto:Marco.Mirazita@lnf.infn.it" class="">Marco.Mirazita@lnf.infn.it</a>>, "dsg-rich" <<a href="mailto:dsg-rich@jlab.org" class="">dsg-rich@jlab.org</a>><br class=""><b class="">Cc: </b>"Robert Miller" <<a href="mailto:rmiller@jlab.org" class="">rmiller@jlab.org</a>>, "Denny Insley" <<a href="mailto:dinsley@jlab.org" class="">dinsley@jlab.org</a>><br class=""><b class="">Sent: </b>Tuesday, September 18, 2018 1:44:49 PM<br class=""><b class="">Subject: </b>Re: [Dsg-rich] URGENT: RICH alarm<br class=""></div><br class=""><div class=""><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;" data-mce-style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000;" class=""><div class=""><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;" data-mce-style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000;" class=""><div class="">Hello,<br class=""></div><br class=""><div class="">From the attached plot and table, it looks like during the time with no N2 flow, humidity increased by 0.28% RH (~ 30% overall increase from before flow loss).</div><br class=""><div class="">After flow had been restored for one hour, the humidity had decreased by 0.18% RH (~ 16% overall decrease from when flow was restored).<br class=""></div><br class=""><div class="">Best regards,<br class=""></div><div class="">Tyler<br class=""></div><br class=""><hr id="zwchr" class=""><div class=""><b class="">From: </b>"Amrit Yegneswaran" <<a href="mailto:yeg@jlab.org" class="">yeg@jlab.org</a>><br class=""><b class="">To: </b>"Mirazita Marco" <<a href="mailto:Marco.Mirazita@lnf.infn.it" class="">Marco.Mirazita@lnf.infn.it</a>><br class=""><b class="">Cc: </b>"dsg-rich" <<a href="mailto:dsg-rich@jlab.org" class="">dsg-rich@jlab.org</a>>, "Robert Miller" <<a href="mailto:rmiller@jlab.org" class="">rmiller@jlab.org</a>>, "Denny Insley" <<a href="mailto:dinsley@jlab.org" class="">dinsley@jlab.org</a>><br class=""><b class="">Sent: </b>Tuesday, September 18, 2018 11:02:43 AM<br class=""><b class="">Subject: </b>Re: [Dsg-rich] URGENT: RICH alarm<br class=""></div><br class=""><div class=""><div style="font-family: tahoma,new york,times,serif; font-size: 14pt; color: #009900" data-mce-style="font-family: tahoma,new york,times,serif; font-size: 14pt; color: #009900;" class=""><div class="">denny, bob <br class=""></div><div class="">in future, for scheduled work please let the RICH group know before hand.<br class=""></div><div class="">amrit<br class=""></div><br class=""><hr id="zwchr" class=""><div class=""><b class="">From: </b>"Marco Mirazita" <<a href="mailto:Marco.Mirazita@lnf.infn.it" class="">Marco.Mirazita@lnf.infn.it</a>><br class=""><b class="">To: </b>"Robert Miller" <<a href="mailto:rmiller@jlab.org" class="">rmiller@jlab.org</a>><br class=""><b class="">Cc: </b>"dsg-rich" <<a href="mailto:dsg-rich@jlab.org" class="">dsg-rich@jlab.org</a>>, "Denny Insley" <<a href="mailto:dinsley@jlab.org" class="">dinsley@jlab.org</a>><br class=""><b class="">Sent: </b>Tuesday, September 18, 2018 10:56:28 AM<br class=""><b class="">Subject: </b>Re: [Dsg-rich] URGENT: RICH alarm<br class=""></div><br class=""><div class="">Hi all,<br class="">it is back now.<br class="">Marco<br class=""><br class=""><br class="">Il 2018-09-18 16:54 Robert Miller ha scritto:<br class="">> Hi Tyler,<br class="">> <br class="">> The N2 was stopped to add a valve; it will be back within the next 10<br class="">> minutes.<br class="">> <br class="">> Bob<br class="">> <br class="">> Sent from my iPhone<br class="">> <br class="">> On Sep 18, 2018, at 10:51 AM, Tyler Lemon <<a href="mailto:tlemon@jlab.org" class="">tlemon@jlab.org</a>> wrote:<br class="">> <br class="">>> Hello Bob and Denny,<br class="">>> <br class="">>> Is there any work being done on the forward carriage nitrogen supply<br class="">>> line?<br class="">>> <br class="">>> RICH lost N2 flow and the aerogel needs to stay constantly purged by<br class="">>> N2 to stay dry.<br class="">>> <br class="">>> Tyler<br class="">>> <br class="">>> -------------------------<br class="">>> <br class="">>> FROM: "Mirazita Marco" <<a href="mailto:Marco.Mirazita@lnf.infn.it" class="">Marco.Mirazita@lnf.infn.it</a>><br class="">>> TO: <a href="mailto:rich@jlab.org" class="">rich@jlab.org</a>, "dsg-rich" <<a href="mailto:dsg-rich@jlab.org" class="">dsg-rich@jlab.org</a>><br class="">>> SENT: Tuesday, September 18, 2018 10:39:21 AM<br class="">>> SUBJECT: [Dsg-rich] URGENT: RICH alarm<br class="">>> <br class="">>> Hi all,<br class="">>> it seems that few minutes ago the N2 flow dropped to 0.<br class="">>> Can someone please check what is going on?<br class="">>> Thank you<br class="">>> Marco<br class="">>> <br class="">>> _______________________________________________<br class="">>> Dsg-rich mailing list<br class="">>> <a href="mailto:Dsg-rich@jlab.org" class="">Dsg-rich@jlab.org</a><br class="">>> <a href="https://mailman.jlab.org/mailman/listinfo/dsg-rich" class="">https://mailman.jlab.org/mailman/listinfo/dsg-rich</a> [1]<br class="">> <br class="">>> <n2flow.png><br class="">> <br class="">> <br class="">> Links:<br class="">> ------<br class="">> [1] <a href="https://mailman.jlab.org/mailman/listinfo/dsg-rich" class="">https://mailman.jlab.org/mailman/listinfo/dsg-rich</a><br class="">> <br class="">> _______________________________________________<br class="">> Dsg-rich mailing list<br class="">> <a href="mailto:Dsg-rich@jlab.org" class="">Dsg-rich@jlab.org</a><br class="">> <a href="https://mailman.jlab.org/mailman/listinfo/dsg-rich" class="">https://mailman.jlab.org/mailman/listinfo/dsg-rich</a><br class="">_______________________________________________<br class="">Dsg-rich mailing list<br class=""><a href="mailto:Dsg-rich@jlab.org" class="">Dsg-rich@jlab.org</a><br class="">https://mailman.jlab.org/mailman/listinfo/dsg-rich<br class=""></div></div><br class="">_______________________________________________<br class="">Dsg-rich mailing list<br class=""><a href="mailto:Dsg-rich@jlab.org" class="">Dsg-rich@jlab.org</a><br class="">https://mailman.jlab.org/mailman/listinfo/dsg-rich</div></div><br class=""></div></div><br class="">_______________________________________________<br class="">Dsg-rich mailing list<br class=""><a href="mailto:Dsg-rich@jlab.org" class="">Dsg-rich@jlab.org</a><br class="">https://mailman.jlab.org/mailman/listinfo/dsg-rich<br class=""></div></div><br class="">_______________________________________________<br class="">Dsg-rich mailing list<br class=""><a href="mailto:Dsg-rich@jlab.org" class="">Dsg-rich@jlab.org</a><br class="">https://mailman.jlab.org/mailman/listinfo/dsg-rich<br class=""></div></div></div>_______________________________________________<br class="">Dsg-rich mailing list<br class=""><a href="mailto:Dsg-rich@jlab.org" class="">Dsg-rich@jlab.org</a><br class="">https://mailman.jlab.org/mailman/listinfo/dsg-rich<br class=""></div></blockquote></div><br class=""></div></body></html>