TEMPERATURE_DIFFERENCE_DETECTOR

Published:2009/7/8 3:14:00 Author:May | From:SeekIC

Pair of National LX5700 temperature transducers delivers output voltage proportional to temperature difference between transducers, as required for sensing temperature gradient in chemieal processes, detecting failure of cooling fan, detecting movement of cooling oil, and monitoring other heat-absorbing phenomena.With sensing transducer in hot condition (out of liquid or in still air for 2 min), adjust 50-ohm pot to setting that just turnspower output off. Next, with transducer in cool condition (in liquid or in moving air for 30 s), find setting that just tums output on. These settings overlap, but final setting between them will provide stable operation.-P. Lefferts, A New Interfacing Concept; the Monolithic Temperature Transducer, National Semiconductor, Santa Clara, CA, 1975, AN-132, p 7.



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