Agilent Technologies 5975C TAD VL MSD, Troubleshooting And Maintenance Manual

Page: 24 / 276

24 5975 Series MSD Troubleshooting and Maintenance Manual
1
Introduction
Operating precautions
•
Turn off the hydrogen at its source every time you shut down the GC or
MSD.
•
Turn off the hydrogen at its source every time you vent the MSD (do not
heat the capillary column without carrier gas flow).
•
Turn off the hydrogen at its source every time shutoff valves in an MSD are
closed (do not heat the capillary column without carrier gas flow).
•
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
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.
4 Eliminate
all
potential sources of ignition in the room.
5 Open the vacuum manifold of the MSD to atmosphere.
6 Wait at least 10 minutes to allow any hydrogen to dissipate.
7 Start up the GC and MSD as normal.
When using hydrogen gas

check the system for leaks to prevent possible fire
and explosion hazards based on local Environmental Health and Safety (EHS)
requirements. Always check for leaks after changing a tank or servicing the
gas lines. Always make sure the vent line is vented into a fume hood.