Specifications

CI Troubleshooting 3
5975 Series MSD Troubleshooting and Maintenance Manual 81
Peak widths are unstable
Wrong or corrupted tune file
Check the tune parameters.
The CI ion source is dirty.
Clean the ion source. See the “CI Maintenance” chapter of this manual for
more information.
Air leak
Run Methane Pretune (in PCI). A visible peak at m/z 32 indicates air in the
system. Check for and correct any leaks. See the “Air Leaks” section at the
beginning of this chapter. After eliminating all air leaks, clean the ion source.