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.