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工作原理

鎧(kai)裝(zhuang)(zhuang)(zhuang)熱電(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)(de)工作原理是由(you)(you)兩種不(bu)同成(cheng)(cheng)(cheng)份的(de)(de)導體(ti)兩端(duan)(duan)(duan)經(jing)焊接，形成(cheng)(cheng)(cheng)回(hui)路，直(zhi)接測溫(wen)端(duan)(duan)(duan)叫測量端(duan)(duan)(duan)，接線端(duan)(duan)(duan)叫參(can)比端(duan)(duan)(duan)。當(dang)測量端(duan)(duan)(duan)和(he)參(can)比端(duan)(duan)(duan)存在溫(wen)差(cha)(cha)時，就會(hui)在回(hui)路中(zhong)產(chan)生(sheng)熱電(dian)(dian)(dian)(dian)流，接上顯示儀(yi)表，儀(yi)表上就會(hui)指示出(chu)熱電(dian)(dian)(dian)(dian)偶(ou)(ou)所產(chan)生(sheng)的(de)(de)熱電(dian)(dian)(dian)(dian)動勢的(de)(de)對應溫(wen)度(du)值。鎧(kai)裝(zhuang)(zhuang)(zhuang)熱電(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)(de)熱電(dian)(dian)(dian)(dian)動勢將隨著測量端(duan)(duan)(duan)的(de)(de)溫(wen)度(du)升高而(er)增長，熱電(dian)(dian)(dian)(dian)動勢的(de)(de)大小(xiao)只和(he)鎧(kai)裝(zhuang)(zhuang)(zhuang)熱電(dian)(dian)(dian)(dian)偶(ou)(ou)導體(ti)材質以(yi)及兩端(duan)(duan)(duan)溫(wen)差(cha)(cha)有(you)關，和(he)熱電(dian)(dian)(dian)(dian)極的(de)(de)長度(du)，直(zhi)徑無關。鎧(kai)裝(zhuang)(zhuang)(zhuang)熱電(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)(de)結構(gou)是由(you)(you)導體(ti)，絕緣氧化鎂(mei)和(he)1Cr18Ni9Ti不(bu)銹鋼保護管經(jing)多次拉(la)制而(er)成(cheng)(cheng)(cheng)，鎧(kai)裝(zhuang)(zhuang)(zhuang)熱電(dian)(dian)(dian)(dian)偶(ou)(ou)產(chan)品主(zhu)要由(you)(you)接線盒，接線端(duan)(duan)(duan)子和(he)鎧(kai)裝(zhuang)(zhuang)(zhuang)熱電(dian)(dian)(dian)(dian)偶(ou)(ou)組成(cheng)(cheng)(cheng)基本結構(gou)，并配以(yi)各種安(an)裝(zhuang)(zhuang)(zhuang)固(gu)定裝(zhuang)(zhuang)(zhuang)置(zhi)組成(cheng)(cheng)(cheng)。

主要(yao)技術(shu)指標

測溫范圍和準確(que)度(du)

注(zhu)：1）t為(wei)被測溫度的(de)******值。

鎧(kai)裝熱電(dian)偶(ou)熱響應時間

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(kai)裝熱電偶(ou)熱響應(ying)時間不大于下表的(de)規定：

絕緣電阻

當周圍空氣溫(wen)度為(wei)20±15℃，相(xiang)對濕度不(bu)大于80﹪時，絕緣(yuan)型鎧裝熱電(dian)偶的偶絲與外(wai)套管之間(jian)的絕緣(yuan)電(dian)阻值(zhi)應(ying)符合下表規定。

型號表示(shi)