Hi Penny, could you send me a scan, showing the behaviour of m2 and m3 during on/off? Since I don't have isodat here, you'd have to make a screenshot (Ctrl+Print Scrn, then paste clipboard into an image editing software). Please zip it and name it screenshot_niwa.zip in order to get through our mailfilter. Cheers Peter On Friday 02 December 2005 07:01, Penny Higgins wrote: > Arrrgh! > > I am trying to run some H2 standard on-offs with our Delta plus XP (I'm > running water dD with the Gas Bench). Alas, I seem to have cup 5 (mass 3) > maxed out at 50 mV and I can't seem to un-max it. I've tried shutting off > the source, restarting the computer, starting a sequence, peak centering, > and jumping to different masses. It's just stuck at 50 mV. I didn't just > lose my cup, did I? > > Does anyone have a quick and painless solution to this wee problem? > > Thanks, > > ~Penny > > ******************************************************************* > Dr. Pennilyn Higgins > Research Associate > > "SIREAL" > Stable Isotope Ratios in the Environment Analytical Laboratory > > Department of Earth and Environmental Sciences > University of Rochester > 227 Hutchison Hall > Rochester, NY 14627 > > [log in to unmask] > > Office: 209b Hutchison Hall Lab: 209 Hutchison Hall > Voice : (585) 275-0601 Outer lab: (585) 273-1405 > FAX : (585) 244-5689 Inner lab: (585) 273-1397 > > http://www.earth.rochester.edu/SIREAL/index.html > ******************************************************************* -- ============================================================ Dr Peter Franz National Institute for Water and Atmospheric Research (NIWA) 301 Evans Bay Pde Private Bag 14901 Kilbirnie Wellington New Zealand Ph : ++64-(0)4-386-0506 Fax: ++64-(0)4-386-2153 Mobile: ++64-(0)211-109304 Email: [log in to unmask] Website: www.niwa.co.nz ============================================================