Agilent Technologies 5975C TAD VL MSD Troubleshooting And Maintenance Manual page 86

4
General Maintenance
Dangerous temperatures
Many parts in the MSD operate at, or reach, temperatures high enough to
cause serious burns. These parts include, but are not limited to:
• GC/MSD interface
• Analyzer parts
• Vacuum pumps
Never touch these parts while your MSD is on. After the MSD is turned off, give
WARNING
these parts enough time to cool before handling them.
The GC/MSD interface heater is powered by a heated zone on the GC. The interface
WARNING
heater can be on, and at a dangerously high temperature, even though the MSD is
off. The GC/MSD interface is well insulated. Even after it is turned off, it cools very
slowly.
The foreline pump can cause burns if touched when operating. It has a safety shield
WARNING
to prevent the user from touching it.
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.
An oil trap is supplied with the standard foreline pump. This trap stops only
pump oil droplets. It does not trap any other chemicals. If you are using toxic
solvents or analyzing toxic chemicals, do not use this oil trap. For all foreline
pumps, install a hose to take the exhaust from the foreline pump outdoors or
86 5975 Series MSD Troubleshooting and Maintenance Manual