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工作原理

鎧(kai)(kai)(kai)裝(zhuang)(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)的工作原理(li)是由兩(liang)種(zhong)不(bu)同成(cheng)(cheng)份的導體(ti)兩(liang)端經焊接(jie)，形成(cheng)(cheng)回路，直(zhi)接(jie)測(ce)溫端叫測(ce)量端，接(jie)線(xian)(xian)端叫參比(bi)端。當測(ce)量端和參比(bi)端存在(zai)溫差(cha)時，就會(hui)在(zai)回路中產(chan)生(sheng)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)流，接(jie)上顯(xian)示(shi)儀(yi)表，儀(yi)表上就會(hui)指示(shi)出熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)所產(chan)生(sheng)的熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)動勢(shi)的對(dui)應溫度(du)(du)值(zhi)。鎧(kai)(kai)(kai)裝(zhuang)(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)的熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)動勢(shi)將隨著測(ce)量端的溫度(du)(du)升高而增(zeng)長，熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)動勢(shi)的大小(xiao)只和鎧(kai)(kai)(kai)裝(zhuang)(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)導體(ti)材質以(yi)(yi)及兩(liang)端溫差(cha)有關，和熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)極的長度(du)(du)，直(zhi)徑無(wu)關。鎧(kai)(kai)(kai)裝(zhuang)(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)的結構(gou)是由導體(ti)，絕緣氧化鎂(mei)和1Cr18Ni9Ti不(bu)銹鋼保護管經多次拉制(zhi)而成(cheng)(cheng)，鎧(kai)(kai)(kai)裝(zhuang)(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)產(chan)品(pin)主要由接(jie)線(xian)(xian)盒，接(jie)線(xian)(xian)端子和鎧(kai)(kai)(kai)裝(zhuang)(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)組(zu)(zu)成(cheng)(cheng)基本結構(gou)，并配以(yi)(yi)各種(zhong)安裝(zhuang)(zhuang)(zhuang)固定裝(zhuang)(zhuang)(zhuang)置組(zu)(zu)成(cheng)(cheng)。

主(zhu)要技術(shu)指標(biao)

測溫范圍(wei)和準確度

注：1）t為被測溫度的******值。

鎧裝熱電(dian)偶(ou)熱響應(ying)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。

鎧裝熱(re)電偶(ou)熱(re)響應時間不大于下(xia)表(biao)的規定：

絕緣(yuan)電(dian)阻

當周圍空(kong)氣溫(wen)度為(wei)20±15℃，相對濕度不大于80﹪時，絕(jue)緣(yuan)型鎧裝熱電(dian)偶的(de)偶絲與(yu)外套管之間(jian)的(de)絕(jue)緣(yuan)電(dian)阻值應符合下表(biao)規定。

型號(hao)表示(shi)