Found CARME at 2E-7.

Closed valve on top of roughing pump. Clamp was not tight. Pressure still good.

Connected to leak cart instead. Brought leak cart to 1E-2. Did not open valve yet. Found CARME pressure at 7.5 mbar. Leak in the backing line? Unclear what happened but moving backing line flexible hose increases pressure. Tightened all clamps. Moving backing flexible hose no longer seems to have effect.

Pumping down again for leak tests. Turbo looks and sounds fine.

Recovered E-6 in few minutes. Reconnected leak cart. Pressure does not increase. Still not sure what happened earlier. Beginning leak tests.

Leaks found in the wire seal around location of picture attached. Would suggest tightening wire seal tomorrow and check again. Leak must be small given base pressure achieved.