[Dsg-htcc] Pressure reading

[nick markov]

Dear All,
HTCC has been moved to its place in the hall, hooked to the gas bottle and connected to an ethernet.
Most of the things work fine, but there are two things we worry about:
- MFC has to be tuned to a C02 instead of nitrogen to have a correct flow readings;
- pressure gauge oftentimes displays negative readings, which looks suspicious.
Thank you very much!
Nick.