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</style><article id="node-697995" class="node node-logentry contextual-links-region article ia-n clearfix" role="article"><header class="node-header"><h1 class="node-title">
<a href="https://logbooks.jlab.org/entry/3625102" rel="bookmark">Follow-up Re: Follow-up Re: Internal flow meter testing</a>
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</header><div class="contextual-links-wrapper"><ul class="contextual-links"><li><a href="https://logbooks.jlab.org/entry/3625102/edit?destination=email/send">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/3625102/delete?destination=email/send">Delete</a></li></ul></div>
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Lognumber <a href="https://logbooks.jlab.org/entry/3625102" class="lognumber" data-lognumber="3625102">3625102</a>. Submitted by <a href="https://logbooks.jlab.org/user/sandoval">sandoval</a> on <time datetime="2018-11-12T14:50:14-0500" pubdate="pubdate"><a href="https://logbooks.jlab.org/entries?start_date=1542048614&end_date=1542055814&book=HBSOLENOID&book=HBTORUS">Mon, 11/12/2018 - 14:50</a></time>. </p>
<p class="last-update">
Last updated on <time datetime="2018-11-12T14:51:27-0500" pubdate="pubdate">Mon, 11/12/2018 - 14:51</time></p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><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/3622406">3622406 - Follow-up Re: Internal flow meter testing</a></td></tr></table></div>
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<p>After I had completed my testing last week some not in use equipment was valved off the LCW loops. </p>
<p>Today we rechecked for another baseline. Internal flow circuits 1-3 improved by approx 10%, circuits 4-5 unaffected </p>
<p>We also performed two supply valve throttle tests:</p>
<p>1) With the MPS valve throttled to 95PSI inlet pressure FSW1&3 were tripping(transistor banks)</p>
<p>2) We repeated the throttle test to go through all (5) internal flow interlocks:</p>
<p>FSW1 tripped at ~97PSI transistor bank<br />
FSW3 tripped at ~95PSI transistor bank<br />
FSW2 tripped at ~60PSI Rect/thyristor<br />
FSW2&4 tripped at ~42 PSI transformer/transformer</p>
<p>The actual trip thresholds for each circuit were adjusted and confirmed:</p>
<p>FSW1 256 divide by ratio, approx 42l/min trip point*<br />
FSW2 64 divide by ratio, approx 4.6l/min trip point**<br />
FSW3 256 divide by ratio, approx 35.5l/min trip point*<br />
FSW4 1 divide by ratio, approx .35l/min trip point<br />
FSW5 1 divide by ratio, approx .32l/min trip point***</p>
<p>*returned to original settings as found 11/6/2018<br />
**did not trip as installed, even with valve full closed<br />
***circuits 4&5 we had no control over the valve settings(due to the low flow settings) need a finer adjustment to get true trip threshold. valve closed test result</p>
<p>Tests carried out by: Bob, Dave, Denny, Probir, Ruben and I.<br />
Results: M:\hallb_eng\CLAS12\Magnets\Operations\Fall 2018 Run\HB_TORSOL_Waterflow</p>
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