20 5977B Series MSD Troubleshooting and Maintenance Manual
1 Introduction
Many parts are dangerously hot
Many parts of the GC/MSD operate at temperatures high enough to cause
serious burns. These parts include, but are not limited to the:
• GC inlets
• GC oven and its contents, including the column nuts attaching the column
to a GC inlet, GC/MS interface, or GC detector
• GC detector
• GC valve box
• Foreline pump
• Heated MSD ion source, interface, and quadrupole
Always cool these areas of the system to room temperature before working on
them. They will cool faster if you first set the temperature of the heated zone
to room temperature. Turn the zone off after it has reached the setpoint. If you
must perform maintenance on hot parts, use a wrench and wear gloves.
Whenever possible, cool the part of the instrument that you will be
maintaining before you begin working on it.
The oil pan under the standard foreline pump can be a fire hazard
Oily rags, paper towels, and similar absorbents in the oil pan could ignite and
damage the pump and other parts of the MSD.
Be careful when working behind the instrument. During cooldown cycles, the GC
emits hot exhaust which can cause burns.
The insulation around the inlets, detectors, valve box, and the insulation cups is
made of refractory ceramic fibers. To avoid inhaling fiber particles, we recommend
the following safety procedures: ventilate your work area; wear long sleeves,
gloves, safety glasses, and a disposable dust/mist respirator; dispose of insulation
in a sealed plastic bag; wash your hands with mild soap and cold water after
handling the insulation.
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