Hi Monique!

 

There are many reasons alarms should have a customized instruction section.

 

For example, some constant volume low volume systems are set up at an 18" sash position and 60 FPM. When sash is raised all the way, the velocity alarm may go off as velocities for CV systems go down as sashes are raised. The relationship between face velocity and sash position is not intuitively obvious to many researchers and students.

 

Our fume hood instruction / safety PowerPoint can easily be appended with any slides explaining a unique exhaust system.

 

 

 

Thanks Bob!

 

We luckily, also found this out before our remodel.  Our faculty thought our previous hoods alarmed for low velocity when in actuality there were only high flow alarms.  However, I was not aware that you could get videos and such.  I will keep that in mind for the future.

 

Best,

 

 

Hi Monique!

 

If university departments have a policy on fume hood velocity alarms, most fume hood companies have instructional videos, PowerPoints, or manuals, into which these policies can be integrated before new hoods and accompanying operating literature are delivered. In the digital age, this requirement is not difficult for manufacturers to meet.

 

However, when fume hoods are delivered to a large project based on general specifications that do not include a requirement to provide specified safety and operation procedures, confusion by end users to alarm situations becomes inevitable.

 

 

 

Alarming when opened at the incorrect sash height or somehow not being used properly is to be left in alarm until they correct the situation.  Any fume hood not functioning properly, including alarms, are tagged out of service until the issue is resolved. 

 

Monique Wilhelm

Laboratory Manager

Department of Chemistry & Biochemistry

University of Michigan - Flint

 

From: ACS Division of Chemical Health and Safety [mailto:DCHAS-L**At_Symbol_Here**PRINCETON.EDU] On Behalf Of Penny Manisco
Sent: Wednesday, February 14, 2018 6:28 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: [DCHAS-L] Policy for Alarming Fume Hood

 

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