I pumped to 0.4 Pa with the meter directly connected to the two stage mechanical vacuum pump.
But I pumped to only 100 Pa with a silicone vacuum hose connected to the vacuum meter. And to 40 Pa with a (long) PVC hose. I used vacuum grease.
Is this due to out-gassing or leakage or some effect with mean free path?
S.A.
out-gassing or leakage or other?
-
- Posts: 117
- Joined: Mon Dec 02, 2013 4:46 pm
- Real name: Sven Andersson
-
- Posts: 117
- Joined: Mon Dec 02, 2013 4:46 pm
- Real name: Sven Andersson
Re: out-gassing or leakage or other?
I withdraw the question. I posted it instead to the new user chat area!