We had to send our probe back to Bruker. One of the tuning arms broke/ fell
off.
________________________________
From: main_at_ammrl.groups.io <main_at_ammrl.groups.io> on behalf of Zdenėk To=
šner via groups.io <zdenek.tosner=natur.cuni.cz_at_groups.io>
Sent: Sunday, July 23, 2023 4:00:12 PM
To: main_at_ammrl.groups.io <main_at_ammrl.groups.io>
Subject: [AMMRL] tuning range shifts on BBFO probe
Dear AMMRL,
I would like to ask for opinions on our recent problem on Bruker Avance III
HD 400MHz with a BBFO probe and a sample changer. It is our workhorse for
routine chemical characterization and runs under icon automation. The system
has been running nicely for almost 7 years. Recently, atma fails regularly
to tune the probe - the optimum tuning shifted towards the "left" border
of the tuning range. Two weeks ago, only chloroform samples had the optimum
tuning out of the range while water samples could still be tuned.. It seems
the tuning range continues to drift and most solvents cannot be tuned now.
What could be the cause? (Resetting the probe files / atma self-re-calibration
does not help)
Best regards,
Zdenėk
--
RNDr. Zdenėk Tošner, Ph.D.
Tel.: +420 221 95 1323
E-mail: zdenek.tosner_at_natur.cuni.cz<mailto:zdenek.tosner_at_natur.cuni.cz>
Laboratory of NMR Spectroscopy
Charles University in Prague
Faculty of Science
Albertov 6, 128 43 Praha 2
http://www.natur.cuni.cz/en
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Received on Sun Jul 23 2023 - 18:43:39 MST