Date: Wed, 13 Oct 93 13:49:09 EDT
Subject: Re: SX50 User group
From: "Neil S. Summer"

Hi John,
Good luck with your new SX50. I'll be happy to participate in any user forum.

Here is my first contribution: This summer we had a corona discharge which our
grounding did not dissipate. After major expediture including our full service
agreement time, we are not entirely back up. SO make sure that your Probe lab
stays within Cameca environmetal spec...humidity <60%; temperature 70!(+-2). The
discharge was facilitated by high humidity and some questionable wiring (the
ground should be <3 Ohm). We depended on building air, now we are insisting on
our own indepedant air conditioning and a single instrument ground isolated from
the building grid.


Neil S. Summer
Department of Geological Sciences,
University of South Carolina,
Columbia, SC 29208

tel (803) 777-6300
fax (803) 777-6610

Summer@probe.geol.scarolina.edu