From edmyers at stanford.edu  Mon Jan 21 13:06:50 2008
From: edmyers at stanford.edu (Ed Myers)
Date: Mon, 21 Jan 2008 13:06:50 -0800
Subject: No HBr
Message-ID: <6.2.5.6.2.20080121130428.01e39710@stanford.edu>

All,

I found the HBr cabinet shut down after the toxic gas alarm.  It 
would not reset, so the HBr will be down until the staff can look in 
to the problem on Tuesday.

Regards,
Ed



From shott at snf.stanford.edu  Mon Jan 21 17:14:33 2008
From: shott at snf.stanford.edu (John Shott)
Date: Mon, 21 Jan 2008 17:14:33 -0800
Subject: No HBr
In-Reply-To: <6.2.5.6.2.20080121130428.01e39710@stanford.edu>
References: <6.2.5.6.2.20080121130428.01e39710@stanford.edu>
Message-ID: <47954379.7040406@snf.stanford.edu>

Ed:

I've got a sneaking suspicion that this wasn't caused by the alarm 
today.  I think that earlier in the weekend there was a report from 
someone that they were seeing a "Low or No" HBr flow on one of the 
machines .... I think that it was lampoly but it may have been pquest, I 
suppose.  If that is, in fact, correct, I think that it would argue that 
this problem occurred prior to the PH3-induced shutdown.  However,  the 
Cl2/HBr cabinet, there was an excess flow sensor on one of those bottles 
that was screwed up several months ago.  I recussitated it with a 
ty-wrap .... but indicated that we should get a replacment.  I'll wager 
that that screwed-up excess flow switch was never replaced .... but that 
it has triggered a cabinet shutdown that is the cause of the current 
problem.
Well, of course we could be actually out of HBr ..... but my money is on 
a screwed up HBr excess flow swittch that never got replaced.

In any event, I'll take a look when I get in first thing in the morning 
.... but  think that problematic excess-flow switch should be examined ....

See you in the morning,

John