110 Operation Manual
7 Resource Conservation
See also “To Create or Edit a Sleep, Wake, or Condition
Method” on page 116.
Wake and Condition Methods
The GC can be programmed to wake in one of several ways:
• By loading the last active method used before going to
sleep
• By loading the WAKE method
• By running a method called CONDITION, then loading the
last active method
• By running a method called CONDITION, then loading the
WAKE method
These choices provide flexibility in how you prepare the GC
after a sleep cycle.
A WAKE method sets a temperatures and flows. The oven
temperature program is isothermal since the GC does not
start a run. When the GC loads a WAKE method, it remains
at those settings until you load another method using the
keypad, data system, or by starting a sequence.
A WAKE method can include any settings, however it
typically will do the following:
• Restore inlet, detector, column, and transfer line flows.
• Restore temperatures.
• Ignite the FID, FPD
+
, or FPD flame.
• Restore inlet modes.
A CONDITION method sets flows and temperatures for the
Other devices
Valve box
• Reduce temperature. (Keep valve box temperature high enough to prevent
sample condensation, if applicable.)
Aux thermal zones
• Reduce or turn off. Also refer to connected device manuals, for example for a
connected MSD.
Aux pressures or flows
• Reduce or turn off as appropriate for connected columns, transfer lines, and so
forth. Always refer to connected device or instrument manuals, for example for
a connected MSD, to maintain at least the minimum recommended flows or
pressures.
Table 14 Sleep method recommendations (continued)
GC Component Comment
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