Dear All
Dear all,
I’m having a vacuum issue with my 20-year-old Oxford 800 MHz pump magnet.
Recently, the fridge pressure suddenly increased from 15 to 21 and stayed
21 for more than 1 year, although it’s still within the specified range
(9.2–25). I also replaced the pump without any change of the pressure.
I’ve tried to locate the source of the vacuum leak but haven’t had any
luck so far.
Has anyone experienced a similar issue or can offer suggestions on how to
diagnose or address this type of vacuum leak?
Alternatively, could anyone recommend a qualified engineer or service provider
familiar with Oxford pumped magnet systems who could take a look at it?
Thank you very much for your time and help.
Best,
Tianzhi
-------------------------------------------------------------------
Tianzhi Wang, Ph. D.
NMR Manager
Sealy center for Structural Biology & Molecular Biophysics
University of Texas Medical Branch,
301 University Bvld, NMR dockside building, Rom 1.104
Galveston, TX 77555-1157
Email: tiawang_at_utmb.edu
(409)7476821 (O)
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Received on Wed Oct 15 2025 - 11:10:29 MST