【摘要】 介绍两种实用的铂电阻 4～ 2 0mA电流变送器电路 ,它们分别采用等效负电阻和专用电阻温度传感器信号调理芯片XTR10 5对铂电阻进行非线性校正。该电路不仅能提高温度信号的测量精度 ,而且适用于远距离传输。更多还原

【Abstract】 WT5”BZ]Two kinds of practical circuits which are 4～20 mA current transmitter for platinum resistance tempera- ture detector(RTD) is introduced.The non-linear of the platinum RTD with equivalent negative resistance and RTD signal adjustive integrated circuit XTR105 can be corrected. Not only can it increase the measuring precision, but also transmit a long distance.更多还原