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R5F21276SDFPU0.pdf    

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Renesas' range of low power 8/16-bit microcontrollers offers the optimized functions including A/D converter for measuring water temperature, serial communication interfaces, and LCD controller for displaying data. A heat meter is essential for managing the heat level and billing data of a heating system. In addition to basic functions for sensing water temperature, flow, and measuring heat units, a variety of other functions are also in demand for heat meters. The high-demand functions include display of spot temperature, flow rate, and wired or wireless connection with a central control unit. 熱量表，是計算熱量的儀表。熱量表的工(gōng)作(zuò)原理(lǐ)：将一對溫度傳感器分(fēn)别安(ān)裝(zhuāng)在通過載熱流體(tǐ)的上行管和下行管上，流量計安(ān)裝(zhuāng)在流體(tǐ)入口或回流管上（流量計安(ān)裝(zhuāng)的位置不同，最終的測量結果也不同），流量計發出與流量成正比的脈沖信号，一對溫度傳感器給出表示溫度高低的模拟信号，而積算儀采集來自流量和溫度傳感器的信号，利用(yòng)積算公(gōng)式算出熱交換系統獲得的熱量。