Clarus 600/680 GC User’s Guide
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in the sample. The FID active method screen varies depending on whether the
detector is configured with manual or programmable pneumatics. This section
describes the screen components for each type of configuration.
Touching the Ignite button allows you to light the FID flame.
Auto-Ignition
The PPC controlled FID has flameout detection and an auto-ignite feature.
Flameout detection occurs 0.5 minutes into the PRE-RUN time and it measures
the user-entered baseline threshold level in mV. If the threshold level is exceeded,
the flame is considered lit, otherwise the Clarus GC detects that the flame is out
and auto-ignite automatically lights the flame before the start of a run.
With the FID temperature set, the air and hydrogen flows set, and auto-ignition
activated by setting a positive mV value for the flame offset, the FID attempts
auto-ignition at -0.5 min. before the system becomes ready. At this
Pre-run time the status bar flashes “
Flame Ignition” as the air flow is shut off,
hydrogen purges the FID for about 10 seconds, and the ignitor energizes for
ignition followed by a return of the air flow to the detector to sustain the flame.
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