So far, the only thing I've done that might conceivably be useful to anyone else is "varianlog", a small perl-script that can be used to do continuous monitoring of vacuum pressure via a "Varian Multigauge".
here is a link to the source-code. Dependencies: well, perl of course, and the SerialPort package.
you can reach the owner of FNANP at mhellwig (at) in (dash) ulm (dot) de
since this seems to be required by German law (nobody knows for sure, though), Impressum.