154
Agilent 7820 GC Service
Ignite the FPD flame, if not lit.
Display the signal output and monitor. This output typically runs
between 40 and 55 but can be as high as 70. Wait for the output
to level off. This takes approximately 1 hour.
If the baseline output is too high:
 Check column installation. If installed high, the stationery
phase burns out and increases measured output.
 Check for leaks.
 Bake out the detector and column at 250 °C.
 Wrong flows set for installed filter.
If the baseline output is zero, verify the electrometer is on
and the flame is lit.
If using a data system, prepare the system to perform one run
using the loaded checkout method. Make sure that the data
system will output a chromatogram.
Start the run.
If performing an injection using an autosampler, start the run
using the data system or press [Start] on the GC.
If performing a manual injection (with or without a data
system):
a Press [Prep Run] to prepare the inlet for splitless
injection.
b When the GC becomes ready, inject 1 µL of the checkout
sample and press [Start] on the GC.
The following chromatogram shows typical results for a new
detector with new consumable parts installed.
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