We have also had problems with beam focus behaviour.  When the instrument
has been off and the KV comes on the focus will go to zero regardless of
what it is set at.  In order to get the focus to stay at say 80 it has been
be adjusted manually.  However, once it is at 80 it will change when the KV
is switched.

At 04:31 PM 01/18/2001 -0500, you wrote:
>Hello all. I'm using a Europa 20/20 and am having problems with the beam
>focus. Here is a description of the problem:
>
>- In all of the following situations the beam focus was set to 87%.
>
>When the HT is set to 4000V, the beam focus goes to 30%.
>When the HT is set to 3000V, the beam focus goes to 54%.
>When the HT is set to 2000V, the beam focus goes to 65-67%.
>When the HT is set to 1000V, the beam focus goes to 86%.
>When the HT is set to 0V, the beam focus goes to 50%.
>
>I am hoping that somebody out there has had this problem before and knows
>of a quick fix so that I don't have to wait until tomorrow to get help from
>tech support.
>
>Thanks!
>
>Anthony
>
>
-----------------------------------------
Peter K. Swart
Professor
RSMAS
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Miami FL 33149

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Stable Isotope Laboratory
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