JEOL Probe Users Listserver Moderator: Ellery Frahm, [log in to unmask], Electron Microprobe Lab, University of Minnesota Post a message: send your message to [log in to unmask] Unsubscribe: send "SIGNOFF PROBEUSERS" to [log in to unmask] On-line help and FAQ: http://probelab.geo.umn.edu/listserver.html * Anthony, Make sure that the pump itself can pull an appropriate vacuum without being attached to the system. Try removing the foreline trap if you have one as they can be an issue if not taken care of properly. It is also possible that there is actually a leak in the system. Primary suspect seals would be the specimen exchange area and the gun or any other area that has recently been taken apart. Check o-rings for fibers, cracks etc. John Hunt -----Original Message----- From: JEOL-Focused Probe Users List [mailto:[log in to unmask]] On Behalf Of Anthony J. Ruth Sent: Friday, July 01, 2011 11:50 AM To: [log in to unmask] Subject: [PROBE-USERS] disabling 30 minute timer JEOL Probe Users Listserver Moderator: Ellery Frahm, [log in to unmask], Electron Microprobe Lab, University of Minnesota Post a message: send your message to [log in to unmask] Unsubscribe: send "SIGNOFF PROBEUSERS" to [log in to unmask] On-line help and FAQ: http://probelab.geo.umn.edu/listserver.html * The superprobe I am working on is having vacuum trouble. We need to run the roughing pump for an extended period of time to reach low vacuum and turn on the diffusion pump, but there is a timer that turns off the system if high vacuum is not reached in 30 minutes. How can I disable the timer? I have tried adjusting the potentiometers on the manual pump control panel so that all three pressure meters report high vacuum, but it still did not disable the timer.