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工作原(yuan)理

鎧(kai)裝熱(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)工作原(yuan)理是(shi)由(you)兩種不(bu)同(tong)成(cheng)(cheng)份的(de)導(dao)體兩端經焊接(jie)，形成(cheng)(cheng)回(hui)路，直(zhi)接(jie)測溫(wen)端叫測量端，接(jie)線(xian)端叫參比端。當測量端和(he)參比端存在溫(wen)差時(shi)，就會(hui)在回(hui)路中產(chan)生(sheng)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)流，接(jie)上顯示儀表，儀表上就會(hui)指示出熱(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)所產(chan)生(sheng)的(de)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)動勢(shi)的(de)對應溫(wen)度值。鎧(kai)裝熱(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)動勢(shi)將隨著測量端的(de)溫(wen)度升高而(er)增長，熱(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)動勢(shi)的(de)大小只和(he)鎧(kai)裝熱(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)導(dao)體材質以及兩端溫(wen)差有關，和(he)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)的(de)長度，直(zhi)徑無(wu)關。鎧(kai)裝熱(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)結(jie)構是(shi)由(you)導(dao)體，絕緣氧化鎂和(he)1Cr18Ni9Ti不(bu)銹鋼保護管經多次拉制而(er)成(cheng)(cheng)，鎧(kai)裝熱(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)產(chan)品主(zhu)要由(you)接(jie)線(xian)盒，接(jie)線(xian)端子和(he)鎧(kai)裝熱(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)組(zu)(zu)成(cheng)(cheng)基(ji)本(ben)結(jie)構，并配以各種安裝固(gu)定(ding)裝置組(zu)(zu)成(cheng)(cheng)。

主要技術指標

測溫(wen)范圍和(he)準確(que)度

注：1）t為(wei)被(bei)測溫度的******值。

鎧裝(zhuang)熱(re)電偶熱(re)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(kai)裝熱電偶熱響應(ying)時(shi)間不大于下表的規定：

絕緣電阻

當(dang)周圍空氣溫度(du)為20±15℃，相(xiang)對濕度(du)不大于80﹪時，絕(jue)緣型鎧裝熱電偶的偶絲與(yu)外套管之(zhi)間的絕(jue)緣電阻值(zhi)應符(fu)合下(xia)表規定。

型(xing)號表示