I've worked off and on with MKS Vacuum systems over the years. I used to have my own (the lab's anyway) back in the late 80's and lost it when the site closed. The big primo vacuum cal system by MKS is the VGCS-200, the smaller similar system is the PVS6.
If anyone out there is experienced with either of these, maybe you'll be able to help me. If not, probably not.
My latest project has been getting a PVS6D system out of mothballs, reactivating it and bringing it online (almost done). Just a few days ago, we were able to obtain an old, mothballed MKS VGCS-200 system. For anyone experienced on these, you'll know it has a roughing pump and a turbo pump. The VGCS-200 system we just received is missing the roughing pump. Does anyone happen to have access to a VGCS-200 system who can tell me the correct model number of the roughing pump? It will likely be an Alcatel. If its not an Alcatel on your system, can you tell me mfr and model of the pump you have? I can cross it to an Alcatel equivalent.