Dear members,
I have just installed a FTS AD-80 air drier with FTS AF-6 flow
regulator in my lab. The dry air is passed through a regulator and
used as the input for the "supply" air for a Varian INOVA 500
console used for spinning, bearing and VT gas. The VT gas (both
high and low) is sent through an FTS chiller and temperature
controller (supplied by Varian). Every 30 seconds when the AD-80
air drier cycles between desicant columns, it make a loud hiss
(which is normal) however the 2H lock signal drops detectably every
time the unit cycles. This (of course) will adversly affect my NMR
measurements. I know that many of you have installed such
systems in your labs. Have you seen the same problem? Do I
have to install a buffer tank?
Here are pressures and flow rates I use:
Input to AD-80 = 80 psi
output from AF6 = 45 psi (as recommended by FTS)
output from regulator, input to "supply" = 30 psi
vt flow meter = 15 L/min
Glenn A. Facey, Ph.D.
NMR Facility Manager
University of Ottawa
mailto:gafacey_at_science.uottawa.ca
http://www.science.uottawa.ca/~nmr
Received on Thu Jun 24 2004 - 15:48:32 MST