Hi, Matthais
I used RT diff probe for a few months, and it happened after I installed
cryoprobe as I did for many years. Nothing has changed for the cryoplatform.
I did plug and unplug the thin blue hose which connects to the probe vacuum
joint when the probe warmed without luck.
Thank you,
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<mailto:tiawang_at_utmb.edu>
(409)7476821 (O)
________________________________
From: main_at_ammrl.groups.io on behalf of Matthias Brandl via groups.io
Sent: Monday, January 5, 2026 11:30 AM
To: main_at_ammrl.groups.io
Subject: Re: [AMMRL] Emergency lift won't stop (AvIII)
Dear Tianzhi,
Did the problem "magically" appear, or did anyone change anything
physically in or around the cryoplatform?
Maybe the hoses for the probe vacuum joint control (which is pneumatic,
a very thin hose) and the emergency lift got swapped somehow. I wouldn't
know how (at least externally), because they are massively different in
size, but sometimes strange things happen...
Best,
Matthias
On 05/01/2026 18:21, Wang, Tianzhi via groups.io wrote:
> Dear All
>
> Thank you to everyone who responded to my question.
> This is a follow-up to my previous post. The problem is still present
> regardless of whether I re-cool the system, press the cooldown button,
> or take other similar actions.
> There are currently two possible solutions. One, suggested by Bruker and
> members of this community is to unplug the emergency tube on the
> cryoplatform. However, this carries a risk: the NMR tube could freeze in
> the event of a power outage, so I am using this option with caution.
> The second solution is to close the V15 valve, which is the vacuum
> valve. This behavior is very strange.
> 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 <mailto:tiawang_at_utmb.edu>
> (409)7476821 (O)
>
> ------------------------------------------------------------------------
> *From:* Wang, Tianzhi <tiawang_at_UTMB.EDU>
> *Sent:* Thursday, December 11, 2025 1:08 PM
> *To:* main <main_at_ammrl.groups.io>
> *Subject:* [AMMRL] Emergency lift won't stop (AvIII)
> Dear All
>
> I just cooled down my 750 cryoprobe. Everything appears to be
> functioning normally, except the emergency lift continues running even
> when the system is cold, and I’m unable to load a sample. I checked the
> emergency-lift valve and confirmed that it was closed. I also ran “cf”
> and rebooted the console, but neither resolved the issue. I would
> greatly appreciate it if anyone could share similar experiences or
> possible solutions.
>
> Best,
> Tianzhi
>
>
>
>
--
Dr. rer. nat. Matthias Brandl (he/him or they/them)
Technical University of Munich
TUM School of Natural Sciences - BNMRZ
Chair of Biomolecular NMR Spectroscopy (Prof. Sattler)
Lichtenbergstr. 4 (postal)
Ernst-Otto-Fischer-Str. 2 (physical)
85748 Garching b. Muenchen
Phone +49 89 289-52617
matthias.brandl_at_tum.de
https://www.sattlerlab.de/
https://www.bnmrz.org/
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Received on Mon Jan 05 2026 - 10:56:55 MST