Good morning,
Driven supports are a really really bad idea. We had construction right beside our facility and the contractor had to go with screw/drilled supports instead. A test piling was shut down after only a few strokes, with the electron microscope people beating me to the work site to shut them down.
So it was not only us, but also other equipment in the neighbouring buildings that was drastically effected. The back filling/pounding of the foundation was also some of the worst, taking down every computer hard drive (back before SSDs) we had in the building. I had pens vibrating across my desk.
Depending on your instruments, shielding, and distances involved heavy equipment moving in proximity to magnetic fields can also distort spectra.
Contact your equipment manufacturer for recommended vibration levels and equipment on how to monitor.
We used lock changes (both during active lock and unlocked monitoring) to follow what was happening.
All the best,
Ryan
---------------------------------------------------------------------------------
Ryan T. McKay, Ph.D.
NMR Facility Supervisor
Room E3-17A Email: ryan.mckay_at_ualberta.ca <mailto:ryan_at_nanuc.ca>
Department of Chemistry Phone: 780.492.9950
University of Alberta Cell: 780.920.8871
Edmonton, Alberta
Canada T6G 2G2
Website: uab.ca/nmr
> On Jan 3, 2018, at 8:18 PM, Jensen, Dell <delljensen_at_augustana.edu> wrote:
>
> I am very interested also in this topic. We will have an addition to our building which will require support driven into the ground a few hundred feet from the room on the ground floor with our shielded Oxford 400Mhz magnet. Any suggestions short of deenergizing?
>
> Dell Jensen
> Augustana College
> Rock Island IL, USA
>
> On Jan 3, 2018 3:58 PM, "Karel Klika" <karkli_at_utu.fi <mailto:karkli_at_utu.fi>> wrote:
> Dear AMMRL,
>
> The annex to our building right below where our NMRs are located will be demolished and a new one built in its place. Any advice and recommendations on how to deal with the issues would be most welcome. Will post a summary in due course.
>
> Many thanks,
> K. Klika
Received on Fri Jan 05 2018 - 08:41:06 MST