CHAPTER 5 AUTO mode and time files
39
drift monitor remains active. When the drifting baseline is within the pre-set
limit the drift monitor is deactivated, and the run continues.
The drift monitor is useful when, for example, after each run a cleaning pulse
is programmed to reduce fouling of the working electrode. A cleaning pulse
consists of e.g. a 10 seconds potential step at -1V.
Fig. 11. Programming the drift monitor in the ‘AUTO SET’ screen.
After this cleaning pulse it takes some time to get a stable baseline again. The
drift monitor can be used to ensure a user-definable stable baseline before
the start of the next run.
However, the duration of each run will always be at least one minute longer.
In this minute the drift in the baseline is monitored.
Step by step example (DECADE = Master)
In this step-by-step guide the example from Table VI will be programmed. In
this example the system consists of an HPLC system, a DECADE with an
electric valve, an integrator, and an on-line microdialysis set-up.
The DECADE is
master
which means that the DECADE starts a run, and
controls the number of automated runs.
Fig. 12. External contact to start the integrator by switching the electric valve.
Hardware connections:
1.
Connect the hardware trigger of the integrator to the ‘Inject marker’ on
the rear panel of the DECADE as indicated in (Fig. 12).
2.
Connect the dialysis tubing to the automated injection valve.
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