HP 6890 series, Руководство по эксплуатации, Страница: 7 / 36

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The filters are marked on the edge with the transmission wavelength.
Each filter has a mirrored sideĊwhich must face the flame when
installedĊand a colored surface.
The sulfur filter is blue/purple and transmits at 393 nanometers.
The phosphorus filter is yellow/green and transmits at 525 nanometers.
The HP 6890 FPD uses an inert fused silica insert liner in the transfer
line. This allows fused silica columns up to 530
ID to run right to the
base of the flame, minimizing sample tailing or loss on chemically active
sites. The liner is also compatible with standard packed columns.
The FPD flame produces considerable water vapor. The detector must be
operated above 120°C to prevent condensation.
Unnecessarily high temperatures can cause thermal decomposition of
many thermally labile phosphorus and sulfur compounds.
Detector temperature can have a significant effect on sulfur sensitivity. If
analyzing compounds with high boiling points, the detector temperature
should be set to 25°C above the final oven temperatureĊif allowed by the
temperature limit of 250°C.
Temperature set below 120 C
Air or hydrogen flow set at or set at
Ignition failure