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Uploaded on May 31, 2010
http://piacanada.ca/en/company/compan... Digital Band-pass Filter graphically adjustable on the Full-range of frequency (20 - 5000 Hz) of the Flame Detector. The High-pass (Lower Limit) and Low-pass (Upper Limit) Filters and the Frequency Spectrum Analysis are performed in real-time by a microcontrolled Flame Sensor for safeguard control. No selection of predetermined filters, adjustable Full-range computing filters, no electronic and analog Filters, Filters with clean cut off without deformation of the signal as analog filters, extraction of the AC signal by computing analysis. The most interesting are the stable shape of the Frequency Spectrum, the High Frequency Flicker, the Fast Adjustment of the filters and the Fast Response to the Filters Changes.