Mike,
We have the NMR Case autosampler, and also experienced this problem. Upon
liaison with Bruker, I was directed to check out the "Max air flow" value
(from the spin lift control board in BSMS) and ensure that this value was
changed from the default value (750) to 1000. In addition, the "Air Flow"
value should be 850 (I forget what the default was).
In case you need it, the keystrokes (in a unix shell box) were: bsms <ret>
y (to confirm you're getting into a debug tool) <ret> a (Board Function
SLCB) <ret> 5 (air flow) <ret> r (read the value) <ret>
This value should be set to 850 if it isn't there already. Do so by typing
"w" instead of "r"
6 (Max air flow) <ret>
r (read the value) <ret>
This value should be set to 1000 if it isn't there already. Do so by typing
"w" instead of "r"
Then you can quit the bsms.
All of this came about (we think) because of a power failure. The equipment
had been set up by the installation engineer, but evidently the default
values had not been changed, only temporary values. If I'm not mistaken,
this procedure is redefining the default values. In any case (pun not
intended!), we have not had any further problems with the autosampler,
though we have had numerous power outages since.
I hope that this helps!!
Brad Norwood
Director of Instrument Facilities
University of Richmond
Department of Chemistry
28 Westhampton Way
Richmond, VA 23173
(804) 287-6328
bnorwood@richmond.edu
-----Original Message-----
From: Mike Lumsden [mailto:lumsden@chem3.chem.dal.ca]
Sent: Thursday, November 13, 2003 10:57 AM
To: BUM
Subject: CASE autosampler eject problems
Hi Everyone,
We have experienced a problem with our Bruker NMR CASE 24
autosampler recently. Last week, we were doing a run overnight
when one of the samples did not completely eject but rather only
made it to the top of the BST and not to the top of the autosampler
adapter collar. Therefore, when the autosampler rotated, it broke
the partially ejected tube and then dropped the next sample down
on top of this broken tube. Luckily, damage was minimal but we are
unsure as to what has gone wrong after only 3 months of trouble- free use.
We have 90 psi going into the console with the console regulator
set at ~70 psi. Furthermore, the eject air can be controlled from the
BSMS keyboard and we have this maxed out at 750. We have
removed the autosampler base plate from the adapter collar and
done a realignment with the alignment tool Bruker supplies. This
did not help. We have also played a bit with the set screws the
troubleshooting manual suggests playing with. Specifically, it
suggests turning screws 1, 2, 5, and 6 a full turn counter-clockwise
which we did...no luck.
I should also mention that we have the newer black interface tube
inside the adapter collar rather than the older brown plastic ones.
Anybody have a fresh idea or two for me?
Thanks,
Mike
---------------------------------------------
Michael D. Lumsden, Ph.D.
NMR Facility Manager
Atlantic Region Magnetic Resonance Centre
Room 428, Department of Chemistry, Dalhousie University Halifax, Nova
Scotia, Canada, B3H 4J3
phone:(902)494-1635
FAX: (902)494-1310
email: mike.lumsden@dal.ca
This archive was generated by hypermail 2b29 : Tue Dec 30 2003 - 01:04:22 PST