<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<p>Yuri,</p>
<p>We have tested both flow meters, and noted inconsistencies in
flow using multiple configurations. During testing this morning
the "in" meter stopped working. We took the cover off and noted
not only a moisture on the display cover, but standing water in
the bottom of the enclosure. <br>
</p>
<p><img src="cid:part1.6B3C2F07.30F91772@jlab.org" alt=""
height="301" width="402"></p>
<p>The boards appear to be coated for moisture protection, however,
the connector has evidence of corrosion which has eaten away the
power connection. After further testing the meter still is
operational, however the connector needs to be replaced in order
for it to work. The power connection is corroded and broken at the
level of the base of the connection, so repair will be difficult
if at all possible. <br>
</p>
<p>That said, these meters are not designed to function where they
can accumulate more moisture than the internal desiccant can
absorb. The desiccant bags are completely saturated. While the
pcbs are coated to prevent damage, the power/data contacts were
only covered by heat shrink, <u>not potted to prevent actual
moisture damage</u>. Additionally, the connector is positioned
at the bottom of the enclosure and recessed, so it actually
collects fluid. <br>
</p>
<p><img src="cid:part2.C64F46CD.B58DBE6B@jlab.org" alt=""
height="373" width="498"> <img
src="cid:part3.56DF48FC.DC8FBC3F@jlab.org" alt="" height="385"
width="512"></p>
<p>When both meters were working the "in" meter measured "closer" to
the manual rotameter than the "out" meter. We hooked up each meter
individually, and in series. While in series, we noted that the
"out" meter only recorded flow when it was the first meter in the
series. <br>
</p>
<p><img src="cid:part4.07353B47.BF65B1CA@jlab.org" alt=""></p>
<table cellspacing="2" cellpadding="2" width="50%" border="1">
<tbody>
<tr>
<td valign="top">Rotameter gph (Lpm)<br>
</td>
<td valign="top">Out (Lpm)<br>
</td>
<td valign="top">In (Lpm)<br>
</td>
</tr>
<tr>
<td valign="top">10 (0.631)<br>
</td>
<td valign="top">0.00<br>
</td>
<td valign="top">0.96<br>
</td>
</tr>
<tr>
<td valign="top">14 (0.88)<br>
</td>
<td valign="top">1.641<br>
</td>
<td valign="top">1.638<br>
</td>
</tr>
<tr>
<td valign="top">16 (1.01)<br>
</td>
<td valign="top">1.725<br>
</td>
<td valign="top">1.654<br>
</td>
</tr>
<tr>
<td valign="top">18 (1.13)<br>
</td>
<td valign="top">2.15<br>
</td>
<td valign="top">1.804<br>
</td>
</tr>
</tbody>
</table>
<p><br>
</p>
<p>Hall B Engineering and you should evaluate the setup and
operation of the chiller to determine if this is the right
equipment for that particular setup. If not, you should consult
with Hall B engineering to select one that may be more
appropriate. I will put the the meters back in the hall before
lunch today.<br>
</p>
<p><br>
</p>
<p>Regards,</p>
<p>Marc<br>
</p>
<br>
<div class="moz-cite-prefix">On 7/16/2018 9:10 AM, Peter Bonneau
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:ff1df2bc-a518-b9ec-4bf9-d9ee55881a2f@jlab.org">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<p>FYI: The SVT flow meter was selected by Hall B engineering
(see email below).</p>
<p>DSG placed the order for the meters as requested by Hall B
engineering.</p>
<p>Hall B engineering should select a meter that meets SVT
requirements.<br>
</p>
<p><br>
</p>
<div class="moz-forward-container"><br>
<br>
-------- Forwarded Message --------
<table class="moz-email-headers-table" cellspacing="0"
cellpadding="0" border="0">
<tbody>
<tr>
<th nowrap="nowrap" valign="BASELINE" align="RIGHT">Subject:
</th>
<td>Re: Flow Meter for SVT</td>
</tr>
<tr>
<th nowrap="nowrap" valign="BASELINE" align="RIGHT">Date:
</th>
<td>Thu, 31 Jul 2014 14:44:09 -0400</td>
</tr>
<tr>
<th nowrap="nowrap" valign="BASELINE" align="RIGHT">From:
</th>
<td>Saptarshi Mandal <a class="moz-txt-link-rfc2396E"
href="mailto:mandal@jlab.org" moz-do-not-send="true"><mandal@jlab.org></a></td>
</tr>
<tr>
<th nowrap="nowrap" valign="BASELINE" align="RIGHT">To: </th>
<td>Peter Bonneau <a class="moz-txt-link-rfc2396E"
href="mailto:bonneau@jlab.org" moz-do-not-send="true"><bonneau@jlab.org></a></td>
</tr>
</tbody>
</table>
<br>
<br>
<pre>Hi Peter,
This one has bigger connections, so might be lesser pressure drop. Will
this work for you ? FLR6302D should work for us.
<a class="moz-txt-link-freetext" href="http://www.omega.com/pptst/FLR-D.html" moz-do-not-send="true">http://www.omega.com/pptst/FLR-D.html</a>
Saptarshi
On 7/31/2014 1:13 PM, Peter Bonneau wrote:
> Hi Saptarshi,
>
>
> I know we've talked about this before, but it needs to be ordered now.
>
> For an interface, we need a 0-5 V output.
>
>
> Thanks,
>
> Peter
</pre>
</div>
<br>
<div class="moz-cite-prefix">On 7/13/2018 12:39 PM, Yuri Gotra
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:14f68992-d459-1933-48d4-671dc06299c4@jlab.org">
<meta http-equiv="Content-Type" content="text/html;
charset=utf-8">
<p>Thank you Peter,</p>
<p>A comment on your statement on the flow meters. The models
and the number of the flow meters purchased (no spares) were
defined by the HBI group. I reported several times that this
model is not designed to work in magnetic field. The flow
meters failed the very first time the solenoid was turned ON.
Please select a model which would be compatible with
requirements of the detector and let me and Bob Miller know. <br>
</p>
<br>
<div class="moz-cite-prefix">On 7/13/18 11:56 AM, Peter Bonneau
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:b5366f68-0abd-f041-7a01-866b6745b392@jlab.org">
<meta http-equiv="Content-Type" content="text/html;
charset=utf-8">
<p><font color="#3333ff">DSG comments regarding these work
requests are in <b>blue.</b></font><br>
</p>
<div class="moz-cite-prefix">On 7/13/2018 9:55 AM, Yuri Gotra
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:183b7675-942a-bf77-0f76-e73846c1569f@jlab.org">For
testing the cooling system in preparation of the SVT for
beam operations it is critical to have measurements of the
coolant flow. Both flow meters observed issues with correct
reading of the flow. The flow meters have been disconnected
from the cooling lines (control lines are still connected).
Please test the flow meters asap. <br>
</blockquote>
<font color="#3333ff">DSG will schedule in this request in
with all the other work in Halls B, C, and D we are doing in
preparation for the upcoming run. <br>
Hall B SVT does not have cooling system repair components
(external to the chillers) which was first mentioned in our
email of 1/31/2017 (listed below).</font><br>
</blockquote>
<br>
</blockquote>
<br>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
dsg-svt mailing list
<a class="moz-txt-link-abbreviated" href="mailto:dsg-svt@jlab.org">dsg-svt@jlab.org</a>
<a class="moz-txt-link-freetext" href="https://mailman.jlab.org/mailman/listinfo/dsg-svt">https://mailman.jlab.org/mailman/listinfo/dsg-svt</a>
</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Marc McMullen
Detector Support Group
757-269-7738</pre>
</body>
</html>