Hi All,
         I have a Delta plus with a gas bench and conflo.  I recently had a 
sudden decrease in sensitivity (10x less sensitivity than normal).  I 
checked the reference gases, conflo, gas bench, and source tuning.  They 
were all fine.  I then replaced the filament and got the same result.  The 
source should not be that dirty, it was last cleaned 8 months ago.  What 
else should I be checking?


Jennifer Eikenberry
Assistant Research Scientist
Michigan Technological University
School of Forest Resources and Environmental Science
1400 Townsend Drive
Houghton, Michigan 49931
Phone 906-487-1774
FAX 906-487-2915