Installation manual

82 5975 Series MSD Operation Manual
3 Operating in Electron Impact (EI) Mode
To vent the MSD
Procedure
1 Select Vent from the Vacuum menu in the software. Follow the instructions
presented.
2 Set the GC/MSD interface heater and the GC oven temperatures to ambient
(room temperature).
3 When prompted, turn off the MSD power switch.
4 Unplug the MSD power cord.
WARNING
If you are using hydrogen as a carrier gas, the carrier gas flow must be off before
turning off the MSD power. If the foreline pump is off, hydrogen will accumulate in
the MSD and an explosion may occur. Read “Hydrogen Safety” before operating
the MSD with hydrogen carrier gas.
CAUTION
Be sure the GC oven and the GC/MSD interface are cool before turning off carrier gas
flow.
WARNING
When the MSD is vented, do not put the ChemStation into Instrument Control view.
Doing so will turn on the interface heater.