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工作原(yuan)理

鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)的工(gong)作(zuo)原理是由(you)(you)兩種(zhong)不(bu)同成份的導體(ti)兩端(duan)(duan)(duan)(duan)經焊接(jie)，形成回(hui)路，直接(jie)測(ce)(ce)溫(wen)端(duan)(duan)(duan)(duan)叫測(ce)(ce)量端(duan)(duan)(duan)(duan)，接(jie)線(xian)端(duan)(duan)(duan)(duan)叫參比端(duan)(duan)(duan)(duan)。當測(ce)(ce)量端(duan)(duan)(duan)(duan)和(he)參比端(duan)(duan)(duan)(duan)存(cun)在溫(wen)差(cha)時(shi)，就會在回(hui)路中產(chan)生熱(re)(re)(re)電(dian)(dian)(dian)(dian)流(liu)，接(jie)上顯(xian)示(shi)儀(yi)表(biao)(biao)，儀(yi)表(biao)(biao)上就會指(zhi)示(shi)出熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)所產(chan)生的熱(re)(re)(re)電(dian)(dian)(dian)(dian)動(dong)勢的對應溫(wen)度值。鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)的熱(re)(re)(re)電(dian)(dian)(dian)(dian)動(dong)勢將隨著測(ce)(ce)量端(duan)(duan)(duan)(duan)的溫(wen)度升高而增長，熱(re)(re)(re)電(dian)(dian)(dian)(dian)動(dong)勢的大(da)小只(zhi)和(he)鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)導體(ti)材質以及兩端(duan)(duan)(duan)(duan)溫(wen)差(cha)有關，和(he)熱(re)(re)(re)電(dian)(dian)(dian)(dian)極的長度，直徑無(wu)關。鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)的結構是由(you)(you)導體(ti)，絕緣氧化(hua)鎂和(he)1Cr18Ni9Ti不(bu)銹鋼保(bao)護管經多次拉制(zhi)而成，鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)產(chan)品主要由(you)(you)接(jie)線(xian)盒(he)，接(jie)線(xian)端(duan)(duan)(duan)(duan)子和(he)鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)組成基本結構，并(bing)配(pei)以各種(zhong)安裝(zhuang)(zhuang)固定裝(zhuang)(zhuang)置(zhi)組成。

主要(yao)技術指標

測(ce)溫(wen)范圍和準確度

注：1）t為被測溫度的******值。

鎧裝熱(re)電偶(ou)熱(re)響應(ying)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)間不大于下(xia)表(biao)的規定：

絕緣電(dian)阻

當周圍空氣溫度為20±15℃，相(xiang)對濕(shi)度不(bu)大于80﹪時，絕緣型鎧裝熱電偶(ou)的偶(ou)絲與外套管之間的絕緣電阻值(zhi)應符合下表規定。

型號表示