6 Advanced Operation Manual
Select a column mode 156
Setting the column parameters for constant flow or constant
pressure 157
Enter a flow or pressure program (optional) 157
Programming column pressure or flow 158
Backflushing a Column 159
Backflushing when connected to an MSD 160
Backflushing using a capillary flow technology device 160
Nickel Catalyst Tube 165
About the nickel catalyst tube 165
Nickel catalyst gas flows 165
Setting temperatures for the nickel catalyst tube 166
5 Detectors
About Makeup Gas 168
About the FID 169
How FID units are displayed in Agilent data systems and on the GC 170
To light the FID flame 171
To extinguish the FID flame 171
FID automatic reignition (Lit offset) 171
Recommended starting conditions for new FID methods 172
Setting parameters for FID 173
About the TCD 174
TCD pneumatics 176
TCD carrier, reference, and makeup gas 176
TCD gas pressures 177
Selecting reference and makeup flows for the TCD 178
Chemically active compounds reduce TCD filament life 178
Changing the TCD polarity during a run 179
Detecting hydrogen with the TCD using helium carrier gas 179
Setting parameters for the TCD 180
About the uECD 182
uECD safety and regulatory information 182
uECD warnings 183
Safety precautions when handling uECDs 184
uECD gas flows 185
uECD linearity 185
uECD detector gas 185
uECD temperature 185
uECD analog output 186
Recommended starting conditions for new uECD methods 186
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