Venting The Msd - Agilent Technologies 5975T LTM GC Operation Manual

Venting the MSD

A program in the data system guides you through the venting process. It turns
off the heaters or the turbo pump at the correct time. It also lets you monitor
temperatures in the MSD and indicates when to vent the MSD.
The MSD will be damaged by incorrect venting. A turbo pump will be damaged
if it is vented while spinning at more than 50% of its normal operating speed.
Make sure the GC/MSD interface and the analyzer zones are cool (below 100 °C)
WA R N I N G
before you vent the MSD. A temperature of 100 °C is hot enough to burn skin; always
wear cloth gloves when handling analyzer parts.
If you are using hydrogen as a carrier gas, the carrier gas flow must be off before
WA R N I N G
turning off the power. If the foreline pump is off, hydrogen will accumulate in the
MSD and an explosion may occur. Read
MSD with hydrogen carrier gas.
Never vent the MSD by allowing air in through either end of the foreline hose. Use the
C A U T I O N
vent valve or remove the column nut and column.
Do not vent while the turbo pump is still spinning at more than 50%.
Do not exceed the maximum recommended total gas flow. See
GC/MSD models and features," on page 15.
5975T LTM GC/MSD Operation Manual
Operating in Electron Impact (EI) Mode
"Hydrogen Safety" before operating the
Table
3
2, "5975T LTM
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