Hi Again--

Post mortem reveals a semicircular crack near top of chromic oxide 
section--seen as tube was pulled out, before all the other cracks 
appeared.  At least it didn't break apart when I went to pull it out.  I 
hates when that happens.

thanks...

take care

gerry

Gerard Olack wrote:
> HI All--
>
> Our Costech EA seems to be pushing the O2 slug through immediately (<2 
> secs).  We've run it for years with ~9 sec delay, and just the other 
> day it seems that the drops are missing the O2--and just catching it 
> if it's set to a 1 sec delay.  Background levels lower and peaks are 
> smaller than expected, but the N2 is coming out a little early.  Sort 
> of like when a seam opens up in the oxidation reactor, but without 
> affecting the flow rate downstream.
>
> He flow rates seem reasonable, ~75 mL/min, valves seem to be switching 
> as expected--He switches to oxygen block, goes through correct line 
> (e.g. micro), to bottom block, and flow to ZeroBlank is only restored 
> when O2 loop reconnected (during time it flushes loop).  He and O2 
> pressure on Costech around 12 psi--in the normal range.
> Switched O2 tanks--nada.
>
> I will be switching out reduction tube (it's dead), and I've baked out 
> the GC column.
>
> Thanks in advance for any advice--yes, I'm bad at posting thanks 
> afterwards...
>
> Back to beating my head against the wall (and leak checking)....
>
> take care
>
> gerry
>
> p.s. yeah, I may just swap out everything...
>