Date: Wed, 25 Mar 2020 20:32:00 +0000
Hi Neal
we leave specially one kind running. The ones with the attached nitrogen liquifier. This allows a system to run unattended until the next helium fill.
For all other cryogenically cooled probes I see no reason to shut them down if the instruments are still used by remote operation.
If the systems are completely unused I would shut it down as run time counts towards your next cryoplatform (coldbay) service interval.
Regards and be well
Clemens
On 3/25/2020 8:27 AM, Stolowich,Neal J. wrote:
**EXTERNAL EMAIL**
And what about cold probes- is everyone going warm during a prolonged shutdown?
I’ve kept mine cold for the first 10 days of our campus research wind down period, but effective tomorrow, all non-essential research must cease, and no one will be allowed in the dept (except for moi 😊)
Hope every one continues to be well!
Neal
Neal J Stolowich, PhD
NMR Facilities Manager
Department of Chemistry
University of Louisville
(502) 852-7894
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From: Heather Schenck <hschenck_at_uwlax.edu><mailto:hschenck_at_uwlax.edu>
Sent: Sunday, March 22, 2020 5:50:49 PM
To: ammrl_at_ammrl.org<mailto:ammrl_at_ammrl.org> <ammrl_at_ammrl.org><mailto:ammrl_at_ammrl.org>
Subject: AMMRL: another facility shutdown question
Beyond cryogen fills, I'm wondering if systems can be left without shimming for up to several months, or if it may be wise to keep a sample locked in the magnet for field stability, etc.
Recently energized magnets especially might be prone to faster shim drift, but I wondered how long a stable system can be left before shims are too bad to recover using routine procedures.
Feedback welcome, and I will try to share results with the group (unless requested not to). Thanks.
Heather
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Bruker BioSpin NMR Applications & Training
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