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工作原理

鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶的(de)(de)(de)工作原理是由(you)兩種不(bu)同成(cheng)份的(de)(de)(de)導體(ti)(ti)兩端(duan)(duan)(duan)經焊接(jie)，形(xing)成(cheng)回(hui)路(lu)，直接(jie)測溫(wen)(wen)端(duan)(duan)(duan)叫測量(liang)端(duan)(duan)(duan)，接(jie)線(xian)端(duan)(duan)(duan)叫參比端(duan)(duan)(duan)。當測量(liang)端(duan)(duan)(duan)和參比端(duan)(duan)(duan)存在(zai)溫(wen)(wen)差時，就會(hui)在(zai)回(hui)路(lu)中產(chan)生(sheng)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)流，接(jie)上(shang)顯(xian)示(shi)(shi)儀表，儀表上(shang)就會(hui)指(zhi)示(shi)(shi)出熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶所(suo)產(chan)生(sheng)的(de)(de)(de)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動(dong)勢的(de)(de)(de)對應溫(wen)(wen)度(du)值。鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶的(de)(de)(de)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動(dong)勢將隨著測量(liang)端(duan)(duan)(duan)的(de)(de)(de)溫(wen)(wen)度(du)升高而(er)增長，熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動(dong)勢的(de)(de)(de)大小(xiao)只(zhi)和鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶導體(ti)(ti)材質以及兩端(duan)(duan)(duan)溫(wen)(wen)差有關，和熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)極(ji)的(de)(de)(de)長度(du)，直徑無(wu)關。鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶的(de)(de)(de)結構(gou)是由(you)導體(ti)(ti)，絕(jue)緣氧化鎂和1Cr18Ni9Ti不(bu)銹鋼保護管(guan)經多次拉(la)制而(er)成(cheng)，鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶產(chan)品主要(yao)由(you)接(jie)線(xian)盒，接(jie)線(xian)端(duan)(duan)(duan)子和鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶組成(cheng)基(ji)本(ben)結構(gou)，并配以各種安裝(zhuang)(zhuang)固定裝(zhuang)(zhuang)置組成(cheng)。

主要技術(shu)指標

測溫范圍(wei)和準確度

注：1）t為被測溫度的******值。

鎧(kai)裝熱(re)電偶熱(re)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。

鎧裝熱電偶熱響(xiang)應(ying)時間不大(da)于下表(biao)的規定：

絕緣電阻

當(dang)周(zhou)圍(wei)空(kong)氣(qi)溫度(du)為20±15℃，相對濕(shi)度(du)不大于80﹪時，絕(jue)緣(yuan)型(xing)鎧裝熱電(dian)(dian)偶(ou)的偶(ou)絲與外(wai)套(tao)管之間的絕(jue)緣(yuan)電(dian)(dian)阻值應符(fu)合下(xia)表規定。

型號表示