Dear Gilles,
we purchased our mass spec in 1990 (a Finnigan MAT delta S) and in the
first year there was problem with the electric magnet. It worked, but
inproperly (the ion beam signal was unstable, supposedly the magnet coil
was broken) . We were told that problem with electric magnet is
extremely rare, but may happen. The Finnigan replaced the magnet with an
other one and it has been working fine for 14 years.
István Fórizs
Gilles Lepoint wrote:
>Dear All,
>We have a VG Optima mass spectrometer since July 1995 (dual inlet and
>coupled to EA (Carlo Erba)).
>Last week, we have experienced a shut off of electronic (filament, source,…)
>(except general power, pumping system and ion gauge).
>We have stopped the machine and verified fuses, filament and controller
>cards. As all seem OK, we have turned on the mass spect. It seems that this
>time electronic was ok (all light green, filament, source,…OK), and we have
>suspected it was a system controller crash which has caused the fault. But
>when we have loaded a tune file, the green light of magnet shut off and
>electromagnet does not work (all other stay Ok).
>We verified one more time fuse and EM controller card and all seem OK (no
>burns on card). Therefore, we think that electro magnet is responsible of
>trouble. Is it possible? Have you any idea of the origin (and solution) of
>this problem?
>Thank you very much for any suggestion.
>Sincerely yours
>Gilles Lepoint, Patrick Dauby
>
>Dr Gilles Lepoint, MARE center,
>Laboratory of Oceanology,
>e-mail: [log in to unmask]
>http://www.ulg.ac.be/oceanbio
>
>37th Ličge Colloquium on Ocean Dynamics
>GAS TRANSFER AT WATER SURFACES
>http://modb.oce.ulg.ac.be/colloquium/2005.html
>
>
>
>
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Dr. FÓRIZS István ......... Istvan FORIZS Ph.D.
Magyar Tudományos Akadémia, Geokémiai Kutatóintézet
Institute for Geochemical Research, Hungarian Academy of Sciences
Cím/Address: H-1112 Budapest, Budaörsi út 45. Hungary
Tel./Phone: (36-1)-309-2600/ mellék/extension 1151
Fax: (36-1)-319-3137
Http://www.geokemia.hu/people/forizs_hu.html
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