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工作原理

鎧裝(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)(de)工作原理是由(you)兩種(zhong)不同成(cheng)份(fen)的(de)(de)導體兩端(duan)(duan)(duan)經焊接，形成(cheng)回(hui)路(lu)，直(zhi)接測溫(wen)(wen)(wen)端(duan)(duan)(duan)叫(jiao)測量(liang)(liang)端(duan)(duan)(duan)，接線(xian)端(duan)(duan)(duan)叫(jiao)參(can)比端(duan)(duan)(duan)。當測量(liang)(liang)端(duan)(duan)(duan)和(he)參(can)比端(duan)(duan)(duan)存在(zai)溫(wen)(wen)(wen)差(cha)時(shi)，就(jiu)會在(zai)回(hui)路(lu)中產生熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)流，接上顯(xian)示(shi)儀(yi)表(biao)，儀(yi)表(biao)上就(jiu)會指示(shi)出(chu)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)所產生的(de)(de)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢的(de)(de)對應溫(wen)(wen)(wen)度(du)值(zhi)。鎧裝(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)(de)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢將(jiang)隨著(zhu)測量(liang)(liang)端(duan)(duan)(duan)的(de)(de)溫(wen)(wen)(wen)度(du)升高而(er)(er)增長(chang)，熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢的(de)(de)大小只和(he)鎧裝(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)導體材質以(yi)及兩端(duan)(duan)(duan)溫(wen)(wen)(wen)差(cha)有關，和(he)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)極的(de)(de)長(chang)度(du)，直(zhi)徑無(wu)關。鎧裝(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)(de)結構是由(you)導體，絕緣氧化鎂(mei)和(he)1Cr18Ni9Ti不銹鋼保護管經多次拉(la)制而(er)(er)成(cheng)，鎧裝(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)產品主要由(you)接線(xian)盒(he)，接線(xian)端(duan)(duan)(duan)子和(he)鎧裝(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)組成(cheng)基(ji)本結構，并(bing)配以(yi)各種(zhong)安裝(zhuang)固定裝(zhuang)置組成(cheng)。

主要技術指標

測溫(wen)范(fan)圍(wei)和準確度(du)

注：1）t為(wei)被測溫度(du)的******值。

鎧裝熱(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)應時(shi)間不(bu)大于下(xia)表的規(gui)定：

絕緣(yuan)電阻

當周圍(wei)空(kong)氣溫度為20±15℃，相對(dui)濕度不(bu)大于80﹪時，絕緣型鎧裝(zhuang)熱電偶的(de)偶絲與外套管之間的(de)絕緣電阻值應(ying)符合(he)下表(biao)規定。

型號表示