Operating Basics 2
Operation Manual 19
To Shut Down the GC for Less Than a Week
1 Wait for the current run to finish.
2 If the active method has been modified, save the changes.
3 Turn off all gases, except the carrier gas, at their sources.
(Leave the carrier gas on to protect the column from
atmospheric contamination.)
4 If you are using cryogenic cooling, turn off the cryo
coolant at the gas source.
5 Reduce detector, inlet, and column temperatures to
between 150 and 200 °C. If desired, the detector can be
turned off. See the following table to determine if it is
advantageous to shut down the detector for a short time
period. The time required to return the detector to a
stable condition is a factor. See Table 1.
Never leave flammable gas flows on if the GC will be unmonitored.
If a leak develops, the gas could create a fire or explosion hazard.
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