電容式變送器廣泛應用于石油、化(hua)工、冶金(jin)、電(dian)(dian)(dian)(dian)力(li)、食品、造紙、醫藥、機械(xie)制造等行業。該產品是根據電(dian)(dian)(dian)(dian)容塵液(ye)(ye)位測量原理(li)為(wei)(wei)探(tan)(tan)級與導(dao)電(dian)(dian)(dian)(dian)液(ye)(ye)體(ti)(ti)構(gou)成(cheng)一(yi)電(dian)(dian)(dian)(dian)容器，其中探(tan)(tan)級線(xian)的(de)(de)(de)金(jin)屬內芯為(wei)(wei)電(dian)(dian)(dian)(dian)容的(de)(de)(de)一(yi)極(ji)(ji)，導(dao)電(dian)(dian)(dian)(dian)液(ye)(ye)體(ti)(ti)為(wei)(wei)電(dian)(dian)(dian)(dian)容的(de)(de)(de)另一(yi)極(ji)(ji)，中間(jian)為(wei)(wei)高穩(wen)定(ding)性(xing)的(de)(de)(de)聚四氟乙烯，即探(tan)(tan)級線(xian)的(de)(de)(de)絕緣外層作為(wei)(wei)兩(liang)極(ji)(ji)之間(jian)的(de)(de)(de)介質，隨著液(ye)(ye)位的(de)(de)(de)變(bian)化(hua)，液(ye)(ye)體(ti)(ti)包圍(wei)探(tan)(tan)級線(xian)的(de)(de)(de)面(mian)(mian)積隨之改變(bian)，使構(gou)成(cheng)電(dian)(dian)(dian)(dian)容器兩(liang)極(ji)(ji)的(de)(de)(de)相對面(mian)(mian)積改變(bian)，導(dao)致電(dian)(dian)(dian)(dian)容的(de)(de)(de)變(bian)化(hua)。
    電容式變送器現場故障處置辦法：
    1.變送器(qi)輸(shu)出(chu)信(xin)號不穩或呈現輸(shu)出(chu)為零(ling)的狀況
    呈現(xian)這種(zhong)狀況時應思考：壓(ya)力(li)源自身是(shi)不(bu)是(shi)安(an)穩(wen)；外表或壓(ya)力(li)傳感器(qi)抗攪擾才能的程度；傳感器(qi)接(jie)線是(shi)不(bu)是(shi)正常；傳感器(qi)自身振蕩及故障原(yuan)因；電(dian)源極性是(shi)不(bu)是(shi)接(jie)反。
    2.mA讀數(shu)偏(pian)高或偏(pian)低
    此刻需要查(cha)看(kan)壓力變量的度數；進行4-20mA輸出調(diao)整(zheng)。
    3.輸入(ru)壓力無反響或泄壓后變(bian)送(song)器不回零位
    查(cha)(cha)(cha)看(kan)變(bian)(bian)(bian)送器(qi)的電(dian)源電(dian)壓(ya)、檢定設備及設定值（4mA和20mA點);查(cha)(cha)(cha)看(kan)壓(ya)力接口是不是漏氣或許被堵住；查(cha)(cha)(cha)看(kan)接線(xian)方法和電(dian)源，假如(ru)正常在查(cha)(cha)(cha)看(kan)傳感(gan)器(qi)零位是不是有(you)輸出，或許進行簡單(dan)加壓(ya)看(kan)輸出是不是改(gai)變(bian)(bian)(bian)，有(you)改(gai)變(bian)(bian)(bian)證明傳感(gan)器(qi)沒有(you)損壞。
    4.壓(ya)力變量度(du)數(shu)偏(pian)低或許偏(pian)高(gao)
    查(cha)看壓(ya)力傳輸是不是發作堵塞；查(cha)看檢定設備及進行(xing)傳感器(qi)調整(zheng)；檢車阻(zu)尼及電動(dong)勢攪擾。