<div dir="ltr"><div class="gmail_default" style="font-size:small"><p class="MsoNormal" style="margin:0cm;font-size:11pt;font-family:Calibri,sans-serif"><a name="_MailAutoSig">Long,</a></p><p class="MsoNormal" style="margin:0cm;font-size:11pt;font-family:Calibri,sans-serif"><a name="_MailAutoSig"><br></a></p><p class="MsoNormal" style="margin:0cm;font-size:11pt;font-family:Calibri,sans-serif"><a name="_MailAutoSig">It feels like your backing pump might have a problem if your backing pump has worked for a big number of hours. Put a gauge close to the rough pump inlet and check the pressure . You might want to check the cooling water for the turbo pump as well. As for the 14 years old penning gauge, I would have it changed.</a></p><p class="MsoNormal" style="margin:0cm;font-size:11pt;font-family:Calibri,sans-serif"><a name="_MailAutoSig"><br></a></p><p class="MsoNormal" style="margin:0cm;font-size:11pt;font-family:Calibri,sans-serif"><a name="_MailAutoSig">Thanks,</a></p>
<p class="MsoNormal" style="margin:0cm;font-size:11pt;font-family:Calibri,sans-serif"> </p>
<p class="MsoNormal" style="margin:0cm;font-size:11pt;font-family:Calibri,sans-serif"><i>Fubo Rao, Ph.D.,</i></p>
<p class="MsoNormal" style="margin:0cm;font-size:11pt;font-family:Calibri,sans-serif"><i><span style="color:rgb(68,114,196)">Nanofabrication Cleanroom Manager,</span></i></p>
<p class="MsoNormal" style="margin:0cm;font-size:11pt;font-family:Calibri,sans-serif"><i><span style="color:rgb(68,114,196)">Center for Nanoscale Materials,</span></i></p>
<p class="MsoNormal" style="margin:0cm;font-size:11pt;font-family:Calibri,sans-serif"><i><span style="color:rgb(68,114,196)">Argonne National Laboratory</span></i></p>
<p class="MsoNormal" style="margin:0cm;font-size:11pt;font-family:Calibri,sans-serif"><i><span style="color:rgb(68,114,196)">9700 S. Cass Ave, Lemont, IL 60439</span></i></p>
<p class="MsoNormal" style="margin:0cm;font-size:11pt;font-family:Calibri,sans-serif"><i><span style="color:rgb(68,114,196)">Phone: 630-252-5708</span></i></p>
<p class="MsoNormal" style="margin:0cm;font-size:11pt;font-family:Calibri,sans-serif"><i><span style="color:rgb(68,114,196)">Email: </span></i><a href="frao@anl.gov"><i><span style="color:rgb(68,114,196)">frao@anl.gov</span></i></a><i><span style="color:rgb(68,114,196)"></span></i></p></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jul 28, 2022 at 8:36 PM Chang, Long <<a href="mailto:lvchang@central.uh.edu">lvchang@central.uh.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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Hello,
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<div>The CM gauge is readying a random value from 0 to 100 mTorr. I am able to get it to work by unplugging power, tap it with screw driver, and plug in power. This CM gauge is less than a year old. The old gauge was replaced because of the same problem.
I have just contacted Oxford for their suggestions, but I also wanted to check if anyone has experienced this problem.</div>
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<div>While I’m at it, our penning gauge will read 1e-9 from time to time. This is easily fixed by replugging it. It’s been like this for many years. Anyone know what might be wrong here? This gauge is 14 years old, so perhaps it just needs to be cleaned?</div>
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<div>Thanks,<br>
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<div dir="auto" style="color:rgb(0,0,0);letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none">
Long</div>
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