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</style><article id="node-600830" class="node node-logentry article ia-n clearfix" role="article"><header class="node-header"><h1 class="node-title">
<a href="https://logbooks.jlab.org/entry/3527955" rel="bookmark">Follow-up Re: Buffer Dewar Controls</a>
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<p class="author-datetime">
Lognumber <a href="https://logbooks.jlab.org/entry/3527955" class="lognumber" data-lognumber="3527955">3527955</a>. Submitted by <a href="https://logbooks.jlab.org/user/kashy">kashy</a> on <time datetime="2018-02-06T06:45:50-0500" pubdate="pubdate">Tue, 02/06/2018 - 06:45</time>. </p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/hblog">HBLOG</a> <a href="https://logbooks.jlab.org/book/hbsolenoid">HBSOLENOID</a> <a href="https://logbooks.jlab.org/book/hbtorus">HBTORUS</a></td></tr><tr><th>References: </th><td><a href="https://logbooks.jlab.org/entry/3527568">3527568 - Buffer Dewar Controls</a></td></tr></table></div>
<div class="logentry node-content">
<p>The tune seems to be faily robust. Even with empty target the magnet inlet temperatures are varying between 0.05 and 0.15K during the batch filling of the target. The dewar is slightly over filled at 63% with the setpoint at 60 so I lowered the min position of the PID EV8210A from 37 to 36.5</p>
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<div class="image-wrapper"><img view_mode="elog_email" class="image-style-plentybig" src="cid:bc033411196701980a6e733a820a6611@logbooks.jlab.org" width="960" height="454" alt="" title="Temperature bumps on the inlets to the magnets" /></div> <div class="image-wrapper"><img view_mode="elog_email" class="image-style-plentybig" src="cid:38bed0176f8098360a8db492f6af4e43@logbooks.jlab.org" width="881" height="764" alt="" title="EV8210A min change" /></div> <div class="image-wrapper"><img view_mode="elog_email" class="image-style-plentybig" src="cid:07d2cb260c18bf4ac3198c1a03bf41bc@logbooks.jlab.org" width="960" height="269" alt="" title="Dewar Helium Level, Pressure and Valve positions" /></div> <div class="image-wrapper"><img view_mode="elog_email" class="image-style-plentybig" src="cid:d3f1fdcf57332b00dc9982fd11bf92f1@logbooks.jlab.org" width="960" height="365" alt="" title="Target Level, fill valve positions, and dewar return temperature" /></div> </div>
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