工作原理(li)

鎧(kai)裝(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的工作原理是由兩(liang)種不(bu)同成(cheng)份(fen)的導體兩(liang)端(duan)經(jing)焊接(jie)，形成(cheng)回路，直(zhi)接(jie)測(ce)溫(wen)(wen)端(duan)叫測(ce)量端(duan)，接(jie)線(xian)端(duan)叫參(can)比(bi)端(duan)。當測(ce)量端(duan)和參(can)比(bi)端(duan)存在溫(wen)(wen)差(cha)時，就會在回路中產生(sheng)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)流，接(jie)上顯示儀表(biao)，儀表(biao)上就會指示出熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)所產生(sheng)的熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢的對應溫(wen)(wen)度值。鎧(kai)裝(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢將隨著測(ce)量端(duan)的溫(wen)(wen)度升高而(er)增長，熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢的大小(xiao)只和鎧(kai)裝(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)導體材質以及(ji)兩(liang)端(duan)溫(wen)(wen)差(cha)有關，和熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)極的長度，直(zhi)徑無(wu)關。鎧(kai)裝(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的結構是由導體，絕緣氧化鎂和1Cr18Ni9Ti不(bu)銹鋼保(bao)護管(guan)經(jing)多次拉制而(er)成(cheng)，鎧(kai)裝(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)產品主要由接(jie)線(xian)盒，接(jie)線(xian)端(duan)子和鎧(kai)裝(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)組成(cheng)基本結構，并(bing)配(pei)以各種安裝(zhuang)固定裝(zhuang)置組成(cheng)。

主要技術指標

測溫范(fan)圍(wei)和準確度

注：1）t為被測溫度的******值。

鎧裝熱電偶熱響應時間

在溫度出現階躍變化時，熱電偶的輸出變化至相當于該階躍變化的50%，所需要的時間稱為熱響應時間，用T_0.5表示。

鎧(kai)裝(zhuang)熱(re)電偶熱(re)響應(ying)時間不大于下表的規定：

絕緣電阻

當周圍空氣溫度為20±15℃，相對濕度不大于80﹪時(shi)，絕(jue)緣型鎧裝熱電(dian)偶的偶絲與外套管之間的絕(jue)緣電(dian)阻值應符合下表(biao)規定。

型號表示