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溫(wen)度(du)變送(song)器(qi)(qi)(qi)的(de)供電(dian)電(dian)源(yuan)不得有(you)尖峰，否則(ze)容易損壞(huai)變送(song)器(qi)(qi)(qi)。變送(song)器(qi)(qi)(qi)的(de)校(xiao)準應(ying)(ying)在(zai)加電(dian)5分(fen)鐘(zhong)后進行(xing)，并且要注意當時環境溫(wen)度(du)。測高(gao)溫(wen)時(>>100℃)傳感(gan)器(qi)(qi)(qi)腔與接線(xian)(xian)(xian)盒間應(ying)(ying)用(yong)填充材料隔離，防(fang)止接線(xian)(xian)(xian)盒溫(wen)度(du)過高(gao)燒(shao)壞(huai)變送(song)器(qi)(qi)(qi)。在(zai)干擾嚴(yan)重(zhong)的(de)情況下(xia)使用(yong)傳感(gan)器(qi)(qi)(qi)，外殼應(ying)(ying)牢固接地避(bi)免干擾，電(dian)源(yuan)及(ji)信號輸(shu)(shu)(shu)出應(ying)(ying)采用(yong)Ф10屏蔽電(dian)纜傳輸(shu)(shu)(shu)，壓線(xian)(xian)(xian)螺母應(ying)(ying)旋緊以(yi)保(bao)證氣密性(xing)。只有(you)RWB型溫(wen)度(du)變送(song)器(qi)(qi)(qi)有(you)0~10mA輸(shu)(shu)(shu)出，為三(san)線(xian)(xian)(xian)制，在(zai)量程值的(de)5%以(yi)下(xia),由于三(san)極管的(de)關斷特性(xing)造(zao)成不線(xian)(xian)(xian)性(xing)。溫(wen)度(du)變送(song)器(qi)(qi)(qi)每6個月應(ying)(ying)校(xiao)準一次，如果DWB因受電(dian)路限制不能(neng)進行(xing)線(xian)(xian)(xian)性(xing)修(xiu)正(zheng)，按說明選(xuan)擇量程以(yi)保(bao)證其線(xian)(xian)(xian)性(xing)。

數據顯示不準的原因
1.線路長，信號衰減；
2.線路阻抗不匹配；
3.信號受干擾，沒有(you)屏蔽；