Dear all,
This is a question for all of you who run NMR facility in an academic institution and your air supply is not from your own air compressor located in your lab or in your building. The air must be from a campus wide loop that is shared by many buildings.
Our campus has cut down the compressed air pressure to save cost. Currently the pressure into the building is 90 psi, after the filter it drops to 80 psi, and after passing through the air dryer in the NMR lab the pressure drops to 70-75 psi. At this low pressure when the usage is high (such as running solid state NMR that requires some kHz spinning) the pressure often drops to below 60 psi, which is not sufficient and can trigger the cryo-probes to warm up.
Could you please let me know what the pressure is that your campus is currently providing? I would like to have two numbers, one is the pressure reading before entering your air dryer, the other is the reading after the air dryer and into the NMR equipment. With your help, we hope to be able to convince the campus to up the pressure by ~10 psi.
THANKS in advance!
Wei
Wei Wycoff
NMR Facility Manager
125 Chemistry Building
601 S. College Ave.
University of Missouri-Columbia
Columbia, MO 65211
Phone: (573) 884-7807 (office), (573) 882-3291 (lab)
Fax: (573) 882-2754
Email: WycoffW_at_missouri.edu
Received on Wed May 16 2012 - 12:25:22 MST