4 Operating in EI Mode
104 5975/5977 Series MSD Operating Manual
Vent the MSD
Procedure
1 Select Method > MSD > Maintenance > Vent/Pump Down and click Vent to
begin the process. Follow the instructions presented.
2 When prompted, turn the vent valve knob counterclockwise only 3/4 turns or
until you hear the hissing sound of air flowing into the analyzer chamber
Figure 29. Vent the MSD