We just purchased a used Agilent 1100 LC/MSD Ion Trap. We have completely set up the system, activated the vacuum system, connected the N and He compressed gas cylinders, and loaded ChemStation, Trap Control and DataAnalysis. When we attempt to put the MS system into Standby mode, we receive an error message: “Gas supply error. (Dry Gas and/or Nebulizer)” and the system goes to Shutdown.

Any ideas? This is our first foray into MS so you are dealing with a bit of a noob here...