工作原理

鎧(kai)裝(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)(de)工作原理(li)是由(you)兩種(zhong)不(bu)同成(cheng)份的(de)(de)導體兩端(duan)經焊接，形成(cheng)回路(lu)，直接測(ce)溫(wen)(wen)端(duan)叫(jiao)測(ce)量端(duan)，接線端(duan)叫(jiao)參比(bi)端(duan)。當測(ce)量端(duan)和參比(bi)端(duan)存在溫(wen)(wen)差時，就會在回路(lu)中產(chan)生(sheng)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)流，接上顯示儀表，儀表上就會指示出熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)所產(chan)生(sheng)的(de)(de)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)動勢(shi)(shi)(shi)的(de)(de)對(dui)應(ying)溫(wen)(wen)度值。鎧(kai)裝(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)(de)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)動勢(shi)(shi)(shi)將隨著測(ce)量端(duan)的(de)(de)溫(wen)(wen)度升(sheng)高(gao)而增長，熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)動勢(shi)(shi)(shi)的(de)(de)大(da)小只和鎧(kai)裝(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)導體材質以及兩端(duan)溫(wen)(wen)差有關，和熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)極的(de)(de)長度，直徑無關。鎧(kai)裝(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)(de)結(jie)構(gou)是由(you)導體，絕緣氧化鎂和1Cr18Ni9Ti不(bu)銹鋼保護(hu)管經多次拉制而成(cheng)，鎧(kai)裝(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)產(chan)品主(zhu)要(yao)由(you)接線盒，接線端(duan)子和鎧(kai)裝(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)組成(cheng)基本結(jie)構(gou)，并配以各種(zhong)安裝(zhuang)固定裝(zhuang)置組成(cheng)。

主(zhu)要技術指標

測溫(wen)范圍(wei)和準確度

注：1）t為被測溫度(du)的******值。

鎧裝熱電偶熱響應時間(jian)

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。

鎧裝熱電偶熱響應時間不大于下(xia)表的規定：

絕(jue)緣電(dian)阻

當周圍空氣(qi)溫(wen)度為20±15℃，相對濕度不大(da)于80﹪時，絕(jue)緣(yuan)型(xing)鎧裝熱電偶的偶絲與外套管之(zhi)間的絕(jue)緣(yuan)電阻值應符合下表(biao)規定。

型號表示(shi)