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<p class="MsoNormal">Dear Aguang,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">At our facility we never let the tanks to go completely empty, so we have avoided this issue. We usually keep the 230L tank attached to the scope for one week and then replace it with the full one. We use the remaining nitrogen for the
daily needs (clipping, loading, freezing etc). This means we always have 2 LN tanks per scope at the facility.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We also monitor the amount of nitrogen in the tank using the industrial scale. LN tank sits on top of the scale when it’s attached to the scope. In this way we know exactly how much LN we have left.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hope this helps.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sincerely,<o:p></o:p></p>
<p class="MsoNormal">Misha<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> --<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:8.0pt">Mykhailo (Misha) Kopylov, Ph.D.<br>
Scientist, Simons Electron Microscopy Center<br>
New York Structural Biology Center<br>
89 Convent Ave, New York, NY 10027<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt"><a href="http://semc.nysbc.org/"><span style="color:#0563C1">semc.nysbc.org</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt">(212) 939-0660 <br>
<a href="mailto:mkopylov@nysbc.org"><span style="color:#0563C1">mkopylov@nysbc.org</span></a></span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">3dem <3dem-bounces@ncmir.ucsd.edu> on behalf of Daniel Dai <dawaylong@hotmail.com><br>
<b>Date: </b>Friday, March 2, 2018 at 10:20 AM<br>
<b>To: </b>"3dem@ncmir.ucsd.edu" <3dem@ncmir.ucsd.edu><br>
<b>Subject: </b>[3dem] Help about ice condensation on LN2 tank mounted to Titan Krios<o:p></o:p></span></p>
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<p><a name="_MailOriginalBody"><span style="font-size:12.0pt;color:black">Hello 3DEMers<o:p></o:p></span></a></p>
<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></span></p>
<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:12.0pt;color:black">We put a 230L lN2 tank in Krios room to cool Autoloader and scope.<o:p></o:p></span></span></p>
<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:12.0pt;color:black">The valves of gas/liquid are always open to make sure auto-refilling work.<o:p></o:p></span></span></p>
<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:12.0pt;color:black">Unfortunately, because the temperate of the valves area is much colder than the room temperature, the water molecule in the room condenses onto the valve area, a dense
ice growing on top.<o:p></o:p></span></span></p>
<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:12.0pt;color:black">This ice melts into water and flows to the ground when the tank is close to emptiness, which bugs me a lot since there are nearby pipes/pumps.<o:p></o:p></span></span></p>
<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:12.0pt;color:black">It's almost impossible to remove the tank immediately every time when the tank is almost empty, since the gauge is not that accurate to know the liquid level.<o:p></o:p></span></span></p>
<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:12.0pt;color:black">I'm wondering how your facility deal with this issue.<o:p></o:p></span></span></p>
<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:12.0pt;color:black">Any suggestion would be greatly appreciated.<o:p></o:p></span></span></p>
<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:12.0pt;color:black">Thanks.<o:p></o:p></span></span></p>
<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></span></p>
<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:12.0pt;color:black">Best regards,<o:p></o:p></span></span></p>
<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:12.0pt;color:black">Aguang at UT Austin<o:p></o:p></span></span></p>
<p><span style="mso-bookmark:_MailOriginalBody"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></span></p>
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