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Theory of Operation
8
1100 Series FD Reference Manual
279
Raw Signal Acquisition (PMT and Reference Diode)
Each raw data value of the PMT and the reference diode signal is measured
synchronized to the flashes of the xenon flash lamp with a 16-bit
analog-to-digital converter.
Dark Subtraction
The dark value of the PMT and the reference signal are measured during any
power cycle of the detector without flash lamp on. These values are stored and
subtracted from any PMT and reference diode value
Normalize Reference Diode Signal
The reference diode, located behind the flow cell, measures the excitation
(EX) light within the flow cell and corrects flash lamp fluctuations. Because of
a non-linear output of the diode (depending on the EX-wavelength), the
measured data are now normalized to get better real light level values within
the flow cell.
Divide PMT/Reference Diode
With this calculation the output of the detector will suppress lamp effects like
lamp flash fluctuations or lamp lifetime.
Filtering
FIR-filters (finite-impulse-response) are used to filter the given raw data and
output it to a the digital data bus and the analog outputs.
Spectra: Collect data to complete spectra
All flashes that are measured to get spectral information are collected to get
one spectra.
Содержание 1100 Series
Страница 1: ...s1 Agilent 1100 Series Fluorescence Detector Reference Manual Agilent G1321A Asset 304025 ...
Страница 12: ...12 1100 Series FD Reference Manual ...
Страница 58: ...60 1100 Series FD Reference Manual 2 First Steps with the Fluorescence Detector ...
Страница 126: ...128 1100 Series FD Reference Manual 4 Troubleshooting and Test Functions ...
Страница 260: ...262 1100 Series FD Reference Manual 7 Introduction to the Fluorescence Detector ...
Страница 324: ...326 1100 Series FD Reference Manual 9 Introduction to the Control Module ...
Страница 340: ...342 1100 Series FD Reference Manual A Safety Information ...
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