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GC/MS Systems
MSD Flowrates (mL/min)
Min Max Diff Pump Max Turbo Pump Tuning Max
5975 0.1 2.0 4.0 2.0
5973 0.1 2.0 4.0 2.0
5972 0.1 2.0 N/A 2.0
5971 0.1 1.5 N/A 1.0
GCD 0.1 1.0 N/A 1.0
Preparing to Clean
Prior to cleaning, the mass spectrometer must be vented and the ion source must be
removed. Before venting the system, the following conditions must be met:
• Heated zones are less than 100°C.
• The diffusion pump is off and cool.
• The turbo pump is off and not spinning.
• The rough pump is off.
Always allow the automatic venting routine to run its full course. Improper venting may
cause diffusion pump fluid to be deposited into the analyzer (backstreaming). It can also
reduce the life of the multiplier or other sensitive MS parts.
Electron Impact (EI) Ion Source
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