工(gong)作原理

鎧(kai)(kai)裝(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶的(de)工作原理是(shi)由(you)兩種不同成(cheng)(cheng)份(fen)的(de)導(dao)(dao)體兩端(duan)經焊(han)接(jie)，形成(cheng)(cheng)回路，直接(jie)測(ce)溫(wen)(wen)端(duan)叫(jiao)測(ce)量端(duan)，接(jie)線(xian)(xian)端(duan)叫(jiao)參比端(duan)。當測(ce)量端(duan)和參比端(duan)存在(zai)溫(wen)(wen)差(cha)時，就會在(zai)回路中產生(sheng)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)流，接(jie)上顯示儀(yi)表(biao)，儀(yi)表(biao)上就會指示出熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶所產生(sheng)的(de)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動(dong)勢的(de)對應溫(wen)(wen)度值。鎧(kai)(kai)裝(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶的(de)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動(dong)勢將隨著(zhu)測(ce)量端(duan)的(de)溫(wen)(wen)度升高而(er)增長(chang)，熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動(dong)勢的(de)大小只(zhi)和鎧(kai)(kai)裝(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶導(dao)(dao)體材質以(yi)及兩端(duan)溫(wen)(wen)差(cha)有(you)關，和熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)極的(de)長(chang)度，直徑(jing)無關。鎧(kai)(kai)裝(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶的(de)結(jie)構是(shi)由(you)導(dao)(dao)體，絕緣(yuan)氧化鎂(mei)和1Cr18Ni9Ti不銹鋼(gang)保護(hu)管經多次拉制而(er)成(cheng)(cheng)，鎧(kai)(kai)裝(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶產品主要由(you)接(jie)線(xian)(xian)盒，接(jie)線(xian)(xian)端(duan)子和鎧(kai)(kai)裝(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶組(zu)成(cheng)(cheng)基本結(jie)構，并配以(yi)各種安裝(zhuang)(zhuang)固定裝(zhuang)(zhuang)置組(zu)成(cheng)(cheng)。

主要技術指(zhi)標

測溫范圍(wei)和準(zhun)確(que)度

注(zhu)：1）t為被測溫度(du)的******值。

鎧裝(zhuang)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(zhuang)熱(re)電偶(ou)熱(re)響應時間(jian)不(bu)大于下表的規(gui)定(ding)：

絕(jue)緣電阻

當周圍空氣溫度為20±15℃，相(xiang)對濕度不大于80﹪時，絕緣(yuan)型鎧裝熱電偶的偶絲與外套管之間的絕緣(yuan)電阻(zu)值應(ying)符合下表規(gui)定(ding)。

型號表(biao)示