Before You Turn On The Msd - Agilent Technologies 5977B Series Operating Manual

Before You Turn On the MSD

Verify the following before you turn on or attempt to operate the 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 MSD is connected to a grounded power source.
• The GC/MSD interface extends into the GC oven.
• A conditioned capillary column is installed in the GC inlet and in the
• The GC is on, but the heated zones for the GC/MSD interface, the GC inlet,
• Carrier gas of at least 99.9995% purity is plumbed to the GC with the
• If hydrogen is used as carrier gas, or JetClean system supply, the carrier gas
• The foreline pump exhaust is properly vented.
The exhaust from the foreline pump contains solvents and the chemicals you are
WA R N I N G
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 to take the foreline pump exhaust outside or to a
fume (exhaust) hood. 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 hydrogen is used as a carrier gas or JetClean system supply, the carrier and
WA R N I N G
JetClean system supply shutoff valves must be closed before turning off the MS
power. If the foreline pump is off, hydrogen will accumulate in the MS and an
explosion may occur. Read
with hydrogen gas.
5977B Series MSD Operating Manual
The front side plate screw should not be tightened, unless hazardous
carrier, JetClean system hydrogen, or reagent gases are being used.
GC/MSD interface.
and the oven are off.
recommended traps. The regulator, plumbing, traps, EPC module, inlet, and
column have been purged of any gas to remove oxygen from the system.
and JetClean system supply shutoff valves must be closed, and the analyzer
top sideplate thumbscrew must be loosely fastened.
"Hydrogen Safety" on page 23 before operating the MSD
Operating in EI Mode 4
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