<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Hi Tyler,</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
The RICH compressor #2 is set at 58-80 psi on the compressor. The normal pressure in the tank is 55-70 psi.</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Regards, <br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Bob<br>
</div>
<div id="appendonsend"></div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Valery Kubarovsky <vpk@jlab.org><br>
<b>Sent:</b> Monday, January 6, 2020 9:18 AM<br>
<b>To:</b> Tyler Lemon <tlemon@jlab.org>; dsg-rich <dsg-rich@jlab.org>; Bob Miller <rmiller@jlab.org><br>
<b>Subject:</b> Re: [Dsg-rich] RICH N2 interlock, compressor settings question for Bob Miller</font>
<div> </div>
</div>
<style>
<!--
@font-face
{font-family:"Cambria Math"}
@font-face
{font-family:Calibri}
p.x_MsoNormal, li.x_MsoNormal, div.x_MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif}
a:link, span.x_MsoHyperlink
{color:#0563C1;
text-decoration:underline}
a:visited, span.x_MsoHyperlinkFollowed
{color:#954F72;
text-decoration:underline}
p.x_msonormal0, li.x_msonormal0, div.x_msonormal0
{margin-right:0in;
margin-left:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif}
span.x_EmailStyle18
{font-family:"Calibri",sans-serif;
color:windowtext}
.x_MsoChpDefault
{font-size:10.0pt}
@page WordSection1
{margin:1.0in 1.0in 1.0in 1.0in}
div.x_WordSection1
{}
-->
</style>
<div lang="EN-US" link="#0563C1" vlink="#954F72">
<div class="x_WordSection1">
<p class="x_MsoNormal">The N2 flow hardware interlock is disabled intentionally.</p>
<p class="x_MsoNormal">We don’t need to shut down the detector if the N2 flow is low.</p>
<p class="x_MsoNormal">We need only alarm</p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal">We are looking for the AIRPR1 behavior. For a moment the minor alarm was set to 55 psi.</p>
<p class="x_MsoNormal">The air flow and temperatures are OK. </p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal"> </p>
<div style="border:none; border-top:solid #B5C4DF 1.0pt; padding:3.0pt 0in 0in 0in">
<p class="x_MsoNormal"><b><span style="font-size:12.0pt; color:black">From: </span>
</b><span style="font-size:12.0pt; color:black">Dsg-rich <dsg-rich-bounces@jlab.org> on behalf of Tyler Lemon <tlemon@jlab.org><br>
<b>Date: </b>Monday, January 6, 2020 at 9:13 AM<br>
<b>To: </b>dsg-rich <dsg-rich@jlab.org>, Bob Miller <rmiller@jlab.org><br>
<b>Subject: </b>[Dsg-rich] RICH N2 interlock, compressor settings question for Bob Miller</span></p>
</div>
<div>
<p class="x_MsoNormal"> </p>
</div>
<div>
<p class="x_MsoNormal" style="background:white"><span style="color:black"> </span></p>
<p class="x_MsoNormal">Hello,</p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal">This morning when reviewing the RICH status we noticed that the N2 flow hardware interlock is disabled. Is this intentional?</p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal">There is still an alarm on the N2 flow so Hall B will still be notified on N2 flow loss, but the hardware interlock system will take no action. </p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal">We also noticed that the air pressure in the cooling tank is periodically giving a minor alarm. Were these alarm limits ever updated after the compressor optimization?</p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal">Bob,</p>
<p class="x_MsoNormal">Before the shutdown you were looking at the compressor on-off pressure settings. Were these settings returned to what Sandro and Dario set them at during the compressor optimization when the compressor was turned back on on Sunday?</p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal">Best regards, </p>
<p class="x_MsoNormal">Tyler</p>
</div>
</div>
</div>
</body>
</html>