Fri, 1 Sep 2006 08:11:02 +0200
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Charlotte Lehmann a écrit :
> At Gilles and others suggestion, I checked to see if the amplifiers
> were zeroes with the source off. they were/are. I ran the amplifier
> test in the diagnostics program and came back with zeroes, but it was
> only finding one gas configuration (CO) not all of them (N2 and CO2
> being left out).
> Then I tried a mass calibration as Sergey suggested. The mass
> calibration cannot be completed because instead of shifting the mass
> 44 BDAC value to a lower magnet field (from start at 11637) as it is
> supposed to (and does for masses 12 and 28), it shifts to a higher
> magnet field (19595) after the second cycle and then cannot find the
> peak on the third cycle.
> We have a newly installed (in June and July) Delta V Advantage
> running with Isodat 2.5.
> Any more suggestions or do I need to call in the Thermo service
> engineer? It is under warranty afterall!
dear charlotte,
I don't know what the values of your resistance and capcities of your
amplifiers are. If thare are the same order try to swap them : 44 on
45 and 45 on 44 and look to your background. You can gently clean them
at the same time
Best regards
--
Dominique Blamart
LSCE/IPSL, Laboratoire CEA-CNRS-UVSQ
Domaine du CNRS
Bât. 12, Avenue de la Terrasse
91198 Gif sur Yvette
France
Tel nat : 01 69 82 43 25
Tel int : 33 1 69 82 43 25
Fax : 33 1 69 82 35 68
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