Glow Discharge Checklist v092100 jhi Turn off or close: . Close GV3 . ratiomatics . IGT . IGP2 . All diagnostic gatevalves . TS . TCI . PCI . ? . Close GV1 . open sv3 . close sv4 to 200 clicks . Close all shutters except . a-port wide angle view If IGP1 is below 1.e-6 Torr open the RGA gatevalve and turn on RGA Fill b-top helium --- leave connection to bottle open as we do with ECDC