At 07:51 PM 3/25/02, you wrote:
>The rubber piece that connects the steel tube coming from the EA to the
>bottom of the outer glass tube of the split popped out once.  When I pushed
>it back in, the outer glass tube slipped upwards until it was against the
>upper black metal mounting plate thus creating enough turbulence to all but
>eliminate ref gas detection.  Could this be happening to your dilution
>Helium?

No, I've run into this problem before. But, I did check here and for some
reason mine was about to fall out of the outertube. I now have it firmly in
place, and ~5mm gap between the outer tube and the upper mounting plate.



>As far as the diluter, when mine is down, the tip is still inside the inner
>tube about 5mm from reaching its end.

If I adjust mine like this it pops out of the guide tube when you withdraw
it. Should that metal guide tube be pointed up or down? Which caps should
be going through this guide and which should be going between the metal
guide and the inner tube?

Also, I know there are *many* variables involved here, but what pressure
range do you use on the dilutor? Again, this never seemed to be a huge
issue before, but now that I'm starting over again (so it seems) I'm
looking for any info from 'normal' working systems that I can find.

Howard

Howard Sanford
919-513-3039
North Carolina State University
Dept. of Soil Science
Box 7619
3114 Williams Hall
Raleigh, NC 27695
http://www.soil.ncsu.edu/