Maintaining the uECD 13
Maintaining Your GC 257
5
If the column is uninstalled, plug the detector connection
with the column nut and no- hole ferrule.
Maintain inert carrier gas flow through the column, or
remove the column from the GC.
6 Set the uECD temperature to 350 to 375 °C, the makeup
gas flow to 60 mL/min, and the oven temperature to
250 °C. If the column is uninstalled, leave the oven off to
protect the column.
7 If the column is installed in the uECD, set the oven
temperature to 250 °C. If the column is uninstalled, leave
the oven off to protect the column.
8 Allow thermal cleaning to continue for several hours and
then cool the system to normal operating temperatures.
The figure below shows detector output during a typical
cleaning cycle.
9 Check the uECD output value on the control table. It
should be lower than the first reading. If it is not, contact
your Agilent service representative.
10 Reinstall the column.
11 Restore the analytical method.
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