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工作原理

鎧(kai)裝(zhuang)(zhuang)(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶的(de)(de)工(gong)作原理(li)是(shi)由(you)兩(liang)種不同成(cheng)份的(de)(de)導(dao)體兩(liang)端(duan)(duan)(duan)經焊(han)接，形成(cheng)回路，直接測溫(wen)端(duan)(duan)(duan)叫測量端(duan)(duan)(duan)，接線(xian)端(duan)(duan)(duan)叫參(can)比端(duan)(duan)(duan)。當測量端(duan)(duan)(duan)和參(can)比端(duan)(duan)(duan)存在(zai)溫(wen)差時，就會(hui)在(zai)回路中產生熱(re)(re)電(dian)(dian)(dian)(dian)流，接上顯示儀(yi)表(biao)，儀(yi)表(biao)上就會(hui)指示出熱(re)(re)電(dian)(dian)(dian)(dian)偶所(suo)產生的(de)(de)熱(re)(re)電(dian)(dian)(dian)(dian)動(dong)勢的(de)(de)對(dui)應溫(wen)度(du)值。鎧(kai)裝(zhuang)(zhuang)(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶的(de)(de)熱(re)(re)電(dian)(dian)(dian)(dian)動(dong)勢將隨著測量端(duan)(duan)(duan)的(de)(de)溫(wen)度(du)升高而增長(chang)，熱(re)(re)電(dian)(dian)(dian)(dian)動(dong)勢的(de)(de)大小只和鎧(kai)裝(zhuang)(zhuang)(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶導(dao)體材質以及兩(liang)端(duan)(duan)(duan)溫(wen)差有(you)關，和熱(re)(re)電(dian)(dian)(dian)(dian)極(ji)的(de)(de)長(chang)度(du)，直徑無關。鎧(kai)裝(zhuang)(zhuang)(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶的(de)(de)結構是(shi)由(you)導(dao)體，絕緣氧(yang)化(hua)鎂和1Cr18Ni9Ti不銹鋼保護(hu)管經多(duo)次拉(la)制而成(cheng)，鎧(kai)裝(zhuang)(zhuang)(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶產品主要由(you)接線(xian)盒，接線(xian)端(duan)(duan)(duan)子和鎧(kai)裝(zhuang)(zhuang)(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶組成(cheng)基本(ben)結構，并配以各(ge)種安裝(zhuang)(zhuang)(zhuang)(zhuang)固定裝(zhuang)(zhuang)(zhuang)(zhuang)置(zhi)組成(cheng)。

主要技術指標(biao)

測溫范圍(wei)和準確度

注：1）t為被測溫度(du)的******值。

鎧裝熱電偶熱響應時間

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。

鎧裝熱電偶熱響應時間不大(da)于下表的規定(ding)：

絕緣電阻

當周圍空(kong)氣(qi)溫度為(wei)20±15℃，相(xiang)對濕度不大于80﹪時，絕緣型鎧裝熱電(dian)偶的偶絲與外(wai)套管(guan)之間的絕緣電(dian)阻值應符(fu)合下表規定。

型號(hao)表示(shi)