DCHAS-L Discussion List Archive
Date: Thu, 19 Nov 2009 16:12:51 -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: Edward Senkbeil <egsenkbeil**At_Symbol_Here**SALISBURY.EDU>
Subject: Hoods
In-Reply-To: <114A3B4A298A4626867825B647FEA486**At_Symbol_Here**chemical6df00a>
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
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