GC-MS Features 9
Operation Manual 133
• If using a flammable carrier gas, the gas is turned off
after the oven cools (for the MS column flow path only).
• If not using a flammable carrier gas, the GC will set very
low flows at each flow- or pressure- controlled device
leading back through the column configuration chain to
the inlet. For example, for a configuration that uses a
purged union at the transfer line, the GC will set the
pressure at the purged union to 1.0 psi, and the pressure
at the inlet to 1.25 psi.
• The GC displays the error state and notes the events in
the logs.
The GC will not be usable until the error state is cleared or
until the MSD is unconfigured from the GC. See “To Use the
GC When the MSD is Shut Down”.
If the MS is repaired or clears its error, or if
communications are restored, the GC will automatically clear
this error state.
Note that for MS instruments without Smart Technologies,
such as a 5975 Series MSD, you can manually create an MS
Shutdown, if desired, by pressing [Aux Det #], scrolling to MS
Shutdown, and then pressing [Enter].
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