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Before checking for magnet orientation or loose or touching wires (and they will move a tiny bit onto the springs when the source assembly is inserted into the mass spec), a quick check is to just run a magnetic scan across the range of masses the machine is designed for and see if you get anything. > I removed and cleaned the ion source for our delta V advantage. I changed > a > new filament and I put back the source and everything looks fine on isodat > screen. Values are… > > HV= 3.01KV > Box= 0.72 mA > Trap= 0.77 mA > vacuum= 1.4e-006 > Magnet (steps)= 11572 > > When I select reference gas (CO2) on the conflo screen to do a jump > calibration no CO2 gas is flowing into the system. I checked for a leak > and NO > leak, we have a half tank CO2 gas. It seems ions are not reaching the cups > or > ions are not generated. I checked the CO2 tank is open, conflo is open and > SGE valve is open. > > I am planning to remove the source again and see if the small opening in > the > side of the ion source chamber is somehow blocked or miss aligned (even > though I checked every thing before I put it back) . Or when I pushed the > source into the mass spectrometer possibly a wire may have been > disconnected?. > > Any advice or suggestions before I remove the ion source again to check > for > any loose connection. > > Thanks > Million >