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Equipment precaution
You MUST make sure the front side-plate thumbscrew is fastened finger-tight.
Do not overtighten the thumbscrew; it can cause air leaks.
Failure to secure your MSD as described above greatly increases the chance of
WARNING
personal injury in the event of an explosion.
You must remove the plastic cover over the glass window on the front of a
5977B Series MSD. In the unlikely event of an explosion, this cover may
dislodge.
General laboratory precautions
• Avoid leaks in the carrier gas lines. Use leak-checking equipment to
• Eliminate from your laboratory as many ignition sources as possible (open
• Do not allow hydrogen from a high pressure cylinder to vent directly to
• Use a hydrogen generator instead of bottled hydrogen.
Operating precautions
• Turn off the hydrogen at its source every time you shut down the GC or
• Turn off the hydrogen at its source every time you vent the MSD (do not
• Turn off the hydrogen at its source every time shutoff valves in an MSD are
• Turn off the hydrogen at its source if a power failure occurs.
• If a power failure occurs while the GC/MSD system is unattended, even if
5975/5977 Series MSD Operation Manual
periodically check for hydrogen leaks.
flames, devices that can spark, sources of static electricity, etc.).
atmosphere (danger of self-ignition).
MSD.
heat the capillary column without carrier gas flow).
closed (do not heat the capillary column without carrier gas flow).
the system has restarted by itself:
1 Immediately turn off the hydrogen at its source.
2 Turn off the GC.
3 Turn off the MSD and allow it to cool for 1 hour.
1
Introduction
21
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