Introduction to the Fluorescence Detector 7
1100 Series FD Reference Manual 245
The radiation source is a xenon flash-lamp. The 3
µ
s flash produces a
continuous spectrum of light from 200 nm to 900 nm. The light output
distribution can be expressed as a percentage in 100 nm intervals, see
Figure 78. The lamp can be used for some 1000 hours depending on the
sensitivity requirements. You can economize during automatic operation using
keyboard setpoints, so the lamp flashes during your analysis only. The lamp
can be used until it no longer ignites, but the noise level may increase with
usage.
UV degradation, especially below 250 nm is significantly higher compared to
Visible wavelength range. Generally the "LAMP ON during run" - setting or
using "economy mode" will increase lamp life by a magnitude.
Figure 78 Lamp Energy Distribution (vendor data)
300 400 500 600 700 800 900
Wavelenght [nm]
Relative
Intensity
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