[3dem] Gatan 655/626 Maintenance

[James Streetley]

Hi Bradley,

As per Patricia and Tobias, we have had good results just cleaning the gauge. The most recent time, cleaning didn’t seem to be enough, so I looked for more information. At least on our pumping station, the gauge is some derivative of a Pfeiffer IKR 251 so you can get a specific manual for it; eg: https://urldefense.com/v3/__https://assets.thermofisher.com/TFS-Assets/CMD/manuals/Cold-Cathode.pdf__;!!Mih3wA!GrDSZcBJbwbx8K83GS4_yRnMQ5SFG9gdHHFCryQHeKPRz1hbWES_O0pE16RtQGDDYapF35w7kQ8h3Z6WFU-CiO1QZxTj1zRmaHw$ 

Unfortunately, I don’t have a satisfactory conclusion – I ordered and fitted a new ignition aid and mounting tool directly from Pfeiffer but it didn’t work first time and I didn’t go back to troubleshoot it again yet, but hopefully the manual gives you some idea of where to look and some confidence disassembling it.

Good luck,
James

Dr James Streetley

SCMI Facility Manager
Scottish Centre for Macromolecular Imaging
Sir Michael Stoker Building
464 Bearsden Road
Glasgow
G61 1QH
United Kingdom

+44 141 330 2161 (office, note new extension)
+44 141 330 7495 (microscope suite)
https://urldefense.com/v3/__https://www.gla.ac.uk/researchinstitutes/iii/cvr/facilities/scmi/__;!!Mih3wA!GrDSZcBJbwbx8K83GS4_yRnMQ5SFG9gdHHFCryQHeKPRz1hbWES_O0pE16RtQGDDYapF35w7kQ8h3Z6WFU-CiO1QZxTjLf7B5Og$ 

From: 3dem <3dem-bounces at ncmir.ucsd.edu> on behalf of Guilliams,Bradley <Bradley.Guilliams at colostate.edu>
Date: Monday, 18 December 2023 at 17:44
To: 3dem at ncmir.ucsd.edu <3dem at ncmir.ucsd.edu>
Subject: [3dem] Gatan 655/626 Maintenance
Hi Everyone,

We have a Gatan 655 Turbo Pumping Station and 626 Cryo Transfer Holder that have sat unused for a number of years. The pumping station has been ‘on’ consistently pulling vacuum on the 626 holder, but the gauge is not working. I was hoping the community had a lead on replacement kits for the Diaphragm pump and the MDP (originally Kit #10546 and #05577, respectively) as no maintenance has been done on the pumping station for at least 3-4 years. The instruction manual that I have for the 655 has instructions to ‘service the Cold Cathode Gauge Tube’ which essentially entails blowing it out with compressed air—how often does this actually fix the gauge when it the needle is reading/stuck to the far-right of the gauge?

Any advice here or leads on replacement parts would be much appreciated.

Cheers,
Bradley

Bradley F. Guilliams (he/him)
PhD Candidate
Ackerson Research Group
Department of Chemistry
Colorado State University

Biological Electron Microscopy GRA
Imaging & Surface Science
Analytical Resources Core (ARC-ISS)
Office of the Vice President for Research<https://urldefense.com/v3/__https://www.research.colostate.edu/__;!!Mih3wA!BjQ6PWi3xXc2hlOQOcv4oCe-KDd-L1Nb9odfOS-Eu045ggYrwYFccF4jSKeFJBlwVf18yOq1iITH_Wh0c2qfCrwOOArXAdw8KWs$>

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