Despite my efforts to fix it,  a small leak appears to be in our Flash 2000 EA instrument. The Eager software shows a 5-6ml/min leak in the carrier gas when I close the outlet gas lines. However, our electronic leak detector and Argon leak testing are not showing the leak. There is gas detected at the auto sampler, but I thought that was normal. I have replaced both reactors and their seals, changed water trap and cleaned A/S piston and replaced it’s seals, then ran 100ml/min Helium carrier gas overnight. Today, argon background is 83mV. Other backgrounds are similar to previous. When I run on/offs, the 30 cup has a baseline around 1200mV and rises with the pulse to about 1400mV. I ran 10+ on/offs, of which all failed to pass. My inexperience leaves me questioning what to check next. Any suggestions are much-appreciated.

 

Thanks,

   Phyllis Dieter

 

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Ohio Agricultural Research and Development Center

Phyllis Dieter, Research Associate

Animal Sciences Department, Gerlaugh Hall, Room 312

1680 Madison Avenue, Wooster, OH 44691

 

Office phone: 330-263-3800

Cell phone: 740-502-8871

Web: https://oardcdairynutritionlab.osu.edu/home