Dear all,
I understand this had been discussed before. The problem is our
building compressed air incoming to the NMR lab is not 100% reliable.
There are several times in a year that the air is down. Although every
time the air is shut down for only 1 hour or even maybe just the
pressure is down for a short time, it still affects the cold probe and
the probe still has to warm up completely. (If without cold probe, it's
only a minor problem.) What do you think would be the best options to
avoid this problem?
We think to insert a 'T' shape pass between the incoming air and the
downstream that goes to the instruments and then use a N2 gas cylinder
to provide ~90 psi air that's needed. But how long can one cylinder
last to work like this? Is this a naive idea?
Maybe we should consider a small air compressor in the lab? But therre
is not much room in the lab, and also the building air is still up >90%
of the time, although not all the time, so I am not sure if it is
necessary.
Could you please share your thoughts and experience, especially when
you take care of cold/cryo probes. The more details, the better.
Thanks for your time. will post summary later.
Dejian
Received on Mon Apr 30 2012 - 04:20:38 MST