Dear Ammrl,
I would like to thank Frederick Morin, Jerry Hirschinger, Edwin Rivera, Stephen Lynch, Mark Swanson, Gray Strahan, Heather Schenck, Martha Norton, Juergen Schulte, Jeffrey Walton, Tom Pratum, Sara Kunz, Kunt Mehr, Malveau Cedric, George Furst, and Ivan Keresztes. Currently, we have no cyropobe. I really like the idea of getting a dedicated compressor and dryer for the air supply. I will highly consider this option if we get cryoprobe in the future. The labs renovation will take a few months (things are very slow at Western), and faculty do not like down time. Having only one 100 psi line in the building is not enough either. So we have requested to put in another 100 psi pipe first. To be honest, I would like 2-3 lines in each floor. The estimated downtime should be one day.
In summary, here are the steps to shut down spectrometer when there is no air supply - before the air is off, turn off VT heater, all RT shim currents, lock power, remove sample, bring the legs down, then turn off air, turn off console, turn off VT.
To get another source for air - use cryogenic N2, or N2 gas cylinder, need regulator, buy/or rent air compressor and dryer (a quiet ones from Bruker). This cost more than putting a separate air pipe.
Things to look out for before you turn the air back on - disconnect main supply line at the wall, purge the air line, no oily residue, dust, water in pneumatic lines, and clog filters. Be sure to route the air somewhere other than the instrument for a period of time before you connect. Then repressurized everything.
I am well educated with the air supply now, thanks to all of you and AMMRL.
Cheers,
Hla Win-Piazza, Ph.D.
Organic Chemistry Lab Coordinator
Western Washington University
Department of Chemistry
Received on Wed Jul 22 2015 - 13:26:46 MST