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Tobias,</div>
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We had a nasty and unusual problem with our OneView that caused us to put the camera back under service contract for a year or two while evaluating whether the issue had been resolved or not. It is still under contract, but I'm not sure that we will renew
it.<br>
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The issue was that our chilled water system for the instrument developed a nasty cyanobacterial infection that we have simply been unable to eliminate. We have been able to knock it down with periodic treatments of things like hydrogen peroxide (the best agent
we have found), but a low level of infection always returns. We think that the original contamination came from the OneView itself, but we couldn't prove that...<br>
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The only problem that we saw because of this was that the baffles in the water line of the OneView would clog with biofilm, causing the camera to overheat and shut down. Fixing this (cleaning the baffles and returning water flow to normal) was a huge investment
of facility time (multiple hours every time it occurred), and it happened frequently enough that in the end, it was worth paying the service contract so that Gatan had to deal with it (i.e., tear the camera apart and totally replace every piece of the water
cooling system with new and hopefully sterile parts). <br>
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We also ended up putting the OneView on a separate chilled water line, using what is effectively a large air-chilled PC cooling system. We have not seen any bacterial contamination in the separate system, and while the main chiller still has the original contamination,
we have yet to see any adverse effects on the microscope.</div>
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I guess the point of the story is we saw a chronic problem that was bad enough to return the camera to a service contract. It's unclear whether we would have saved money by simply paying Gatan to do the work they did and attaching the camera to the independent
chiller. That said, the service contract gave me enough peace of mind that it was worth the cost...<br>
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David Gene Morgan<br>
Electron Microscopy Center<br>
047E Simon Hall<br>
IU Bloomington<br>
812 856 1457 (office)<br>
812 856 3221 (3200)<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> 3dem <3dem-bounces@ncmir.ucsd.edu> on behalf of Tobias Furstenhaupt <furstenh@mpi-cbg.de><br>
<b>Sent:</b> Wednesday, March 30, 2022 9:33 AM<br>
<b>To:</b> 3dem@ncmir.ucsd.edu <3dem@ncmir.ucsd.edu><br>
<b>Subject:</b> [External] [3dem] your experiences with the Gatan Oneview?</font>
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Dear colleagues<br>
<br>
we have bought a new Gatan OneView that works fine and suits perfectly the scientific needs. But it will come out of warrenty soon and I am wondering if a service contract would be necessary.<br>
Therefore I was wondering what the experiences 'in the field' are: Do you have a maintenance contract and what problems did you have so far?<br>
Our worst problems so far were failing communications and this could be fixed by a simple restart of the controller...<br>
<br>
cheers <br>
Tobias <br>
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----------------------------------- <br>
Tobias Fürstenhaupt, PhD <br>
head of Electron Microscopy <br>
Max Planck Institute of Molecular Cell Biology and Genetics (MPI-CBG) <br>
Pfotenhauerstrasse 108 <br>
01307 Dresden, Germany <br>
<br>
mail: furstenh@mpi-cbg.de <br>
phone: (+49) (0)351 210-2690 <br>
cell: (+49) (0)176 / 44498706 (NEW!)<br>
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