Before You Turn On The Gc/Msd - Agilent Technologies 5975T LTM GC Operation Manual

Before You Turn On the GC/MSD

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Verify the following before you turn on or attempt to operate the GC/MSD.
• The vent valve must be closed (the knob turned all the way clockwise).
• All other vacuum seals and fittings must be in place and fastened correctly.
• The instrument is connected to a grounded power source.
• A conditioned LTM column module and a guard column are installed in the
• The instrument is on, but the heated zones for the GC/MSD interface, the
• Carrier gas of at least 99.9995% purity is plumbed to the inlet with the
• If hydrogen is used as carrier gas, carrier gas flow must be off and the front
• If hydrogen is being used as a carrier gas the optional micro-ion vacuum
• The foreline pump exhaust is properly vented.
The exhaust from the foreline pump contains solvents and the chemicals you are
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analyzing. If using the standard foreline pump, it also contains traces of pump oil. If
you are using toxic solvents or analyzing toxic chemicals, remove the oil trap
(standard pump) and install a hose (10-mm id) to take the foreline pump exhaust
outside or to a fume (exhaust) hood. If using toxic chemicals you should also attach
the split vent and purge vent outlets to this exhaust system. Be sure to comply with
local regulations. The oil trap supplied with the standard pump stops only pump oil.
It does not trap or filter out toxic chemicals.
If you are using hydrogen as a carrier gas, do not start carrier gas flow until the
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MSD has been pumped down. If the vacuum pumps are off, hydrogen will
accumulate in the instrument and an explosion may occur. Read
before operating the instrument with hydrogen carrier gas.
5975T LTM GC/MSD Operation Manual
(The the front side plate screw should not be tightened, unless hazardous
carrier or reagent gasses are being used.
GC inlet and in the GC/MSD interface.
GC inlet, LTM column module, and guard column enclosure are off.
recommended traps.
sideplate thumbscrew must be loosely fastened.
gauge must be turned off.
Operating in Electron Impact (EI) Mode
3
"Hydrogen Safety"
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