Date: Fri, 20 Nov 2009 10:54:04 -0500
Reply-To: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: Joseph Passante <Joe**At_Symbol_Here**EHRS.UPENN.EDU>
Subject: Re: Hoods
In-Reply-To: <4B056E830200002900015FD1**At_Symbol_Here**mail2.salisbury.edu>

Hood alarms do need calibration and many fail after a few years.  Have  
you taken face velocities on the hoods?

Joseph R. Passante, CIH, CHO
Associate Director
Chemical Hygiene Officer
Environmental Health & Radiation Safety
University of Pennsylvania
215.746.6550



On Nov 19, 2009, at 4:12 PM, Edward Senkbeil wrote:

> The hoods (about 5 years old) in all our undergraduate chemistry  
> labs are equipped with alarms which supposedly should go off with  
> improper air flow.  However many will continually alarm if the sash  
> is pulled up by more than one third the way (below where sash has a  
> normal catch about half way up).
>
> Is there any law / regulation which states that we must have the  
> alarms working if they are part of the original equipment?  All the  
> hoods have flow gauges on them which are functioning, but we have  
> been unable to get all the alarms to work properly.  We are told it  
> would be very expensive to get them all functioning.  They become a  
> problem in large student labs since they continually go off, and are  
> distracting both faculty and students.
>
> We have considered disarming the alarm, but are concerned about any  
> regulations we might be violating.
> Students are beginning to not pay attention to the flow gauges, but  
> just automatically hit the mute button on the alarms.  We believe  
> the flow gauges are a more accurate reflection of any problems.
>
> Any comments or suggestions welcome.
>
> Ed Senkbeil, Ph.D.
> Chemistry Department
> Salisbury University

Previous post   |  Top of Page   |   Next post



The content of this page reflects the personal opinion(s) of the author(s) only, not the American Chemical Society, ILPI, Safety Emporium, or any other party. Use of any information on this page is at the reader's own risk. Unauthorized reproduction of these materials is prohibited. Send questions/comments about the archive to secretary@dchas.org.
The maintenance and hosting of the DCHAS-L archive is provided through the generous support of Safety Emporium.