[Sneap] Keithley Meters

[Chris Westerfeldt]

Hi Jim,
    I¹m not sure what your application is but I can tell you that I built
three electrometer boxes back in 1994 to replace our old and failing vacuum
tube based Keithley electrometers.  I use the Keithley 485 electrometer.  I
provided a ten position push-button switch on the front end to permit users
to select between different beam stops, collimators, etc.  The input to each
switch is protected by a SA15C.  To my knowledge, we have never had the
input to the Keithley damaged.  These are now the ³older generation²
electrometers, perhaps you are using a newer generation that is less
forgiving?
Regards,
- Chris
-- 

Chris R. Westerfeldt
Research Scientist / T.U.N.L. Radiation Safety Manager
Duke University Physics Department &
Triangle Universities Nuclear Laboratory
Science Drive, Box 90308
Durham, NC  27708-0308
Tel: (919) 660-2600
Fax: (919) 660-2634
Email: Cwest at Tunl.Duke.Edu



From: jim <starkj at execulink.com>
Reply-To: Symposium of Northeastern Accelerator Personnel
<sneap at tunl.duke.edu>
Date: Thu, 6 Mar 2008 20:51:29 -0500
To: Symposium of Northeastern Accelerator Personnel <sneap at tunl.duke.edu>
Subject: [Sneap] Kiethley Meters

  Hi All Has anyone a fix for the new Keithley's they seem to get knocked
off with even small sparks to the corona.
 Any new solutions appreciated.


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