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Previous by Date: Subject: Re: [DCHAS-L] Laser lab design - Vibration concerns Date: June 19, 2013 2:37:29 PM EDT Author: Harry Elston |
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Olivier,
It is best to have vibration-sensitive instruments in a basement but a poured concrete building is almost as stable.
Vibration measurements are done with a calibrated accelerometer and have units of velocity (microns/s) in the three Cartesian axes. The specifications are supplied by the equipment manufacturer, the maker of an atomic force microscope in our case.
The manufacturer's maximum building velocity was 3 microns/s p-p and the vibration frequency spectrum had to be less than the VC-D. standard. We also measured the acoustic noise against the manufacturer's standard of NC-45.
Scott Goode
--------------------------------------------------------
Scott Goode, Professor
Department of Chemistry and Biochemistry
University of South Carolina
631 Sumter Street
Columbia SC 29208
Email: Goode**At_Symbol_Here**sc.edu
Phone: 803-777-2601
Fax: 803-777-9521
-----Original Message-----
From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of Leogane Olivier
Sent: Tuesday, June 18, 2013 9:38 PM
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Subject: [DCHAS-L] Laser lab design - Vibration concerns
Hi all,
Any of you know the vibration criteria used in their building? Depending on the type of research, for example, if you are using laser or vibration sensitive equipment, which vibration criteria has been chosen?
And more importantly, why is this level have been chosen? Is it better, regarding you experience, to have a building with low-level of vibration or to buy a better optic table (cost vs effectiveness)
Best regards,
__________
Olivier Leogane, Ph.D.
EHS Officer, Chemical safety
University of Montre´al
Tel: 514-343-6111 ext 2824
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