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Site Preparation Operating Environment ______________________________________________________________ A few examples are listed below: • Walking across a carpet in a room that is at 20% relative humidity can cause as much as 35,000 V of electrostatic potential to be generated on your skin. A similar trip in a room at 80% relative humidity generates about 1,500 V of electrostatic potential. • Sitting and working in a chair padded with polyurethane foam in a room at 20% relative humidity can cause as much as 18,000 V of electrostatic potential to develop on your skin, or 1,500 V at 80% relative humidity. • Working in laboratory coats and clothing made of synthetic fibers can cause the accumulation of static electricity on your skin. • Styrofoam cups and packing materials typically have a considerable electrostatic charge on them. The discharge of static electricity is not perceptible to a human being until the potential is at least 4,000 V. Many electronic components, however, are damaged by a discharge of electrostatic potential of as little as 100 V. ESD damage can be catastrophic: your system can cease to function altogether. More commonly, however, ESD damage causes latent problems by damaging sites in sensitive components that might cause premature failures. Therefore, the following precautions are recommended, especially when you are operating your system at the lower end of the relative humidity specification listed above: • Use a static-dissipating floor covering (such as tile or conductive linoleum) in the room housing your TRACE MS system. • Use laboratory chairs covered with natural fiber or other staticdissipating material. • When operating the system, wear laboratory coats and clothing made of natural fiber or other static-dissipating material. • Do not place Styrofoam cups or packing materials on the system. Telephone Ensure that a telephone is installed in your laboratory within 2 m (6 ft) of your TRACE MS system. This will allow you to conveniently operate the system while speaking with ThermoQuest Technical Support personnel. Lighting Ensure that your TRACE MS system working area is properly lit. Good overhead lighting makes any work area more enjoyable. A small, highintensity lamp is recommended for use when cleaning TRACE MS components. 1-12 ____________ Finnigan TRACE MS Preinstallation Requirements Guide_____________
Site Preparation ___________________________________________________________________ Exhaust System 1.6 Exhaust System It is your responsibility as the user to provide an adequate exhaust system. Most of what is introduced into the TRACE MS will eventually be exhausted from the rotary pump, along with a small amount of oil vapor that these pumps characteristically emit. Therefore, the pump should be connected to a fume exhaust system. The rotary pump connects to the rear of the TRACE MS at bench level by a reinforced vacuum hose. A connector suitable for 13 mm (1/2") i.d. tubing is fitted to the pump exhaust. Consult local regulations for the proper method of exhausting the fumes from your system. To carry out the venting, a user-supplied fume cupboard or oil mist filter is recommended. Caution. Do not use an oil mist filter with CI instruments. Note. Instrument damage resulting from incorrectly plumbed exhaust lines is not covered under warranty. _____________ Finnigan TRACE MS Preinstallation Requirements Guide _____________ 1-13
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