I searched the Archives and scanned a few years, but have found nothing on this subject.
Both TMC and Fabrika legs have an adjustment for the piston and active control.
I cannot recall every piston height of the many NMR's I've seen and am wondering if there is any thought or consensus on what the ideal height should be. In the documentation for both TMC and Fabrika, one is instructed to make adjustments such that the leveling arm is approximately 1mm lower on the piston side relative to the valve side. This seems pretty well represented in what I have seen. The piston height recommendations are for about 10mm, which I think I have rarely seen if ever. The documentation explains that the piston should be about half way into its working range to provide the best vibration isolation. Most of the magnets I recall were set lower than by from 1mm to 5mm.
Since I have to replace the pads on the adjustment screws on my systems anyway, I thought I would ask what others, with perhaps more experience than me, have made a best practice.
Thanks in advance for your replies!
Scott
Scott K. Smith Ph.D.
SERC-NMR Manager
Department of Chemistry
University of Houston
Office: SERC-5025
Lab: SERC-W5009
Phone: 832-842-8862
Received on Wed Sep 27 2017 - 06:27:38 MST