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October 2017

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Subject:
From:
Andrea Orlando <[log in to unmask]>
Reply To:
JEOL-Focused Probe Users List <[log in to unmask]>
Date:
Sun, 1 Oct 2017 15:17:17 +0000
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Thanks you very much foto tour suggestione Jens.
Andrea

Il 2017-09-30 07:42 Andersen, Jens ha scritto:
> I had issues like these some time ago on a Jeol 733. A simple
> re-soldering of the connecting cables resolved the problem. I would
> recommend a good check for loose connections and a clean of the
> contacts where the cables are connected to the spectrometers before
> trying anything more expensive. In my case the loose connections
> caused low counts because of intermittent signal, and electronic noise
> added to the background.
> 
> Best wishes, Jens
> 
>  ----------
> Jens C Andersen
> Camborne School of Mines
> University of Exeter
> Cornwall Campus
> Penryn TR10 9EZ
> 
>  On 30 Sep 2017, at 03:45, Joe Geller <[log in to unmask]>
> wrote:
> 
>> Andrea. We have some Noran PCS boxes but have no way is testing
>> them. Did you switch the boxes to different working spectrometers to
>> see if they work properly?
>> 
>> Regards
>> 
>> Joe Geller. Gellermicro.com [2]
>> 
>>> On September 29, 2017 at 4:10 AM Andrea Orlando wrote:
>>> 
>>> Dear all,
>>> our microprobe Jeol JXA-8600 has 4 preamplifiers
>>> (Noran-TracorNorthern Proportional counting System) and SamX
>>> control software. Two of preamplifiers have problems; in
>>> particular, counts on the background rised of one or two orders of
>>> magnitudes and at the same time the counts on peaks falled down.
>>> We performed several tests during these weeks and we confirmed
>>> that the problem should be in the preamplifier electronics. In the
>>> past, sometimes we had similar, sporadic and ephemeral problems,
>>> happening without an evident reason, but they solved suddenly. So,
>>> do you know if it is possible to find new pre-amplifiers in the
>>> market or get them repaired somewhere? Thank you very much for
>>> your suggestions.
>>> Andrea
>>> 
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> Microprobe Lab, University of Minnesota
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