溫度變送器的注意事項
時間：2018-01-17
作者：儀器(qi)網
閱讀：4125
溫(wen)(wen)度變(bian)送(song)器(qi)(qi)的供電(dian)(dian)(dian)電(dian)(dian)(dian)源(yuan)不得有(you)尖峰，否則(ze)容易損壞變(bian)送(song)器(qi)(qi)。變(bian)送(song)器(qi)(qi)的校準應(ying)在加(jia)電(dian)(dian)(dian)5分鐘后(hou)進行，并且(qie)要注(zhu)意當時環境溫(wen)(wen)度。測高溫(wen)(wen)時(>>100℃)傳感器(qi)(qi)腔(qiang)與接(jie)線(xian)(xian)(xian)盒間應(ying)用填充材料隔離，防止接(jie)線(xian)(xian)(xian)盒溫(wen)(wen)度過高燒(shao)壞變(bian)送(song)器(qi)(qi)。在干(gan)擾嚴重的情況下使用傳感器(qi)(qi)，外殼應(ying)牢固接(jie)地避免(mian)干(gan)擾，電(dian)(dian)(dian)源(yuan)及信號輸出應(ying)采用Ф10屏蔽電(dian)(dian)(dian)纜(lan)傳輸，壓線(xian)(xian)(xian)螺母應(ying)旋緊以(yi)保證氣密(mi)性(xing)(xing)(xing)。只有(you)RWB型(xing)溫(wen)(wen)度變(bian)送(song)器(qi)(qi)有(you)0~10mA輸出，為三線(xian)(xian)(xian)制(zhi)，在量程值的5%以(yi)下,由(you)于三極管的關(guan)斷特性(xing)(xing)(xing)造成不線(xian)(xian)(xian)性(xing)(xing)(xing)。溫(wen)(wen)度變(bian)送(song)器(qi)(qi)每(mei)6個月應(ying)校準一次，如果(guo)DWB因受電(dian)(dian)(dian)路限制(zhi)不能(neng)進行線(xian)(xian)(xian)性(xing)(xing)(xing)修正，最(zui)好按說明(ming)選擇(ze)量程以(yi)保證其線(xian)(xian)(xian)性(xing)(xing)(xing)。
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