FUME EXTRACTION
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May 24, 2017
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May 24, 2016
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Abstract
A fume extraction apparatus (1) which comprises an extraction pump (6), and the apparatus further comprising a sensor arrangement (12a, 12b, 13) to measure a differential pressure across the pump and to measure a speed of the extraction pump, and the apparatus comprising a controller (10) which comprises a data processor, the data processor arranged to calculate a flow rate of air through the pump using the measurements from the sensor arrangement, and to compare the calculated flow rate to a target flow rate, and the controller arranged to issue a control signal to control the speed of the pump so as to better align the flow rate with the target flow rate.
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