罗斯蒙特变送器两线制变送器是指现场变送器与控制室仪表联系仅用两根导线,这两根线既是电源线,又是信号线。热电阻是把温度变化转换为电阻值变化的一次元件,变送器通常需要把电阻信号通过引线传递到计算机控制装置或者其它一次仪表上。工业用热电阻安装在生产现场,与控制室之间存在一定的距离,因此热电阻的引线对测量结果会有较大的影响。在热电阻的两端各连接一根导线来引出电阻信号的方式叫二线制:这种引线方法很简单,但由于连接导线必然存在引线电阻,电阻大小与导线的材质和长度的因素有关,因此这种引线方式只适用于测量精度较低的场合。两线制变送器的特点是:不易受寄生热电偶和沿电线电阻压降和温漂的影响,可用非常便宜的更细的导线;可节省大量电缆线和安装费用。027-88062221传真:027-88068180网址:http://www.whdkm.com/LED">ABSolute;top:0;border:0;width:undefinedpx;height:undefinedpx;" frameborder="0" src="https://googleads.g.doubleclick.net/pagead/ads?client=ca-pub-6745515041074118&ouTPUt=html&adk=1812271804&adf=3279755396&plat=1%3A32776%2C2%3A32776%2C9%3A32776%2C16%3A8388608%2C17%3A32%2C24%3A32%2C25%3A32%2C30%3A1081344%2C32%3A32&format=0x0&url=https%3A%2F%2Fwww.bizrobot.com%2Fcompany_bloginfo.php%3Fact%3D1&ea=0&flash=28.0.0&pra=5&wgl=1&dt=1625733077236&bpp=10&bdt=419&idt=101&shv=r20210624&cbv=%2Fr20190131&ptt=9&saldr=aa&cookie=ID%3Df208fc56032ec04a-222ab57211c400ce%3AT%3D1602655468%3ART%3D1602655468%3AS%3DALNI_MZ90KP_NdNDKAtfzA4A4RaK0MMehQ&nras=1&correlator=6936517059980&frm=23&ife=1&pv=2&ga_vid=860049470.1625733077&ga_sid=1625733077&ga_hid=2027464004&ga_fc=0&nhd=1&u_tz=480&u_his=5&u_java=0&u_h=1080&u_w=1920&u_ah=1030&u_aw=1920&u_cd=24&u_nplug=11&u_nmime=26&adx=-12245933&ady=-12245933&biw=1259&bih=852&isw=730&ish=360&ifk=2699508910&scr_x=0&scr_y=0&oid=3&pvsid=2831210797548716&pem=596&ref=https%3A%2F%2Fwww.bizrobot.com%2Fcompany_bloginfo.php&eae=2&fc=1920&brdim=589%2C200%2C589%2C200%2C1920%2C0%2C1259%2C852%2C730%2C360&vis=1&rsz=%7C%7Cs%7C&abl=NS&fu=32772&bc=29&ifi=1&uci=1.rc1vdq6nl4vq&dtd=139" marginwidth="0" marginheight="0" vspace="0" hspace="0" allowtransparency="true" scrolling="no" allowfullscreen="true" data-google-container-id="1.rc1vdq6nl4vq" data-load-complete="true"> |