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<p style="margin-top:0; margin-bottom:0">Thanks a lot for your input.</p>
<p style="margin-top:0; margin-bottom:0">We have this problem with the LN2 tanks from outside gas vendor and our newly purchased tanks (brand-new).</p>
<p style="margin-top:0; margin-bottom:0">Since there are used and new tanks, I would like to guess it may be not because of LN2 tanks.</p>
<p style="margin-top:0; margin-bottom:0">For the filling lines/pipes/tubes leakage, I'm not sure now and need to talk to FEI engineers about this possibility.
<br>
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<p style="margin-top:0; margin-bottom:0">About the suggestion to remove the tank before emptiness, I'm thinking about that too, some remaining issues:</p>
<p style="margin-top:0; margin-bottom:0">1) Dense ice on top of the tank, the gause could be hidden under ice. A industrial scale could be the solution.</p>
<p style="margin-top:0; margin-bottom:0">2) The timing of a full tank on our Krios varies much, from 3 days to 6 days, so a scheduler might be not very useful here.</p>
<p style="margin-top:0; margin-bottom:0">Anyway, thanks a lot for the info that you don't have this issue, then I can talk to FEI about it.</p>
<p style="margin-top:0; margin-bottom:0">Have a good weekend!</p>
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<p style="margin-top:0; margin-bottom:0">Best regards,</p>
<p style="margin-top:0; margin-bottom:0">Aguang at UT Austin<br>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> Jaime Martín-Benito Romero <jmartinb@cnb.csic.es><br>
<b>Sent:</b> Friday, March 2, 2018 7:24:27 PM<br>
<b>To:</b> Daniel Dai<br>
<b>Subject:</b> Re: [3dem] Help about ice condensation on LN2 tank mounted to Titan Krios</font>
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<div class="PlainText">Dear Daniel,<br>
<br>
I'm sure there's a problem with your tank. We have two 180 litre tanks <br>
and we have never observed condensation/ice in the valves of the tanks <br>
(we also always keep the valves open for refilling)<br>
<br>
Best regards,<br>
<br>
Jaime<br>
<br>
<br>
At Fri, 2 Mar 2018 15:20:30 +0000 Daniel Dai <dawaylong@hotmail.com> wrote:<br>
<br>
> Hello 3DEMers<br>
><br>
><br>
> We put a 230L lN2 tank in Krios room to cool Autoloader and scope.<br>
><br>
> The valves of gas/liquid are always open to make sure auto-refilling work.<br>
><br>
> Unfortunately, because the temperate of the valves area is much <br>
> colder than the room temperature, the water molecule in the room <br>
> condenses onto the valve area, a dense ice growing on top.<br>
><br>
> This ice melts into water and flows to the ground when the tank is <br>
> close to emptiness, which bugs me a lot since there are nearby <br>
> pipes/pumps.<br>
><br>
> It's almost impossible to remove the tank immediately every time <br>
> when the tank is almost empty, since the gauge is not that accurate <br>
> to know the liquid level.<br>
><br>
> I'm wondering how your facility deal with this issue.<br>
><br>
> Any suggestion would be greatly appreciated.<br>
><br>
> Thanks.<br>
><br>
><br>
> Best regards,<br>
><br>
> Aguang at UT Austin<br>
<br>
<br>
<br>
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