Problem innotec SNF 2011-10-31 16:21:54: Bell Jar needs shim; lower very carefully

jimkruger at snf.stanford.edu jimkruger at snf.stanford.edu
Mon Oct 31 16:21:54 PDT 2011


The Bell Jar lift lost a shim so the bell jar may not seal on pump-down unless it is lowered very carefully.  If you go all the way down, fast, the back side goes too far and the front will not seal.  If the yellow light stays onfor too long on pump-down, stop, raise the jar a little, close with less "overshoot", and pump again.
I had truoble on 2 of 4 pump-downs.




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