108 Operation Manual
6 General Maintenance
Before Starting
Dangerous temperatures
Many parts in the MS operate at, or reach, temperatures high
enough to cause serious burns. These parts include, but are not
limited to:
• GC/MS interface
• Analyzer parts
• Vacuum pumps
The GC inlets and GC oven also operate at very high
temperatures. Use the same caution around these parts. See the
documentation supplied with your GC for more information.
Chemical residue
Only a small portion of your sample is ionized by the ion source.
The majority of any sample passes through the ion source
without being ionized. It is pumped away by the vacuum system.
As a result, the exhaust from the foreline pump will contain
traces of the carrier gas and your samples. Exhaust from the
standard foreline pump also contains tiny droplets of foreline
pump oil.
WARNING
The foreline pump can cause burns if touched when operating.
WARNING
Never touch these parts while your MS is on. After the MS is turned
off, give these parts enough time to cool before handling them.
WARNING
The GC/MS interface heater is powered by a thermal zone on the GC.
The interface heater can be on, and at a dangerously high
temperature, even though the MS is off. The GC/MS interface is well
insulated. Even after it is turned off, it cools very slowly.
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