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工作原理

鎧裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)偶的工作原理(li)是由(you)兩(liang)種(zhong)不同(tong)成(cheng)(cheng)份的導(dao)(dao)體兩(liang)端(duan)(duan)(duan)(duan)(duan)經(jing)焊接(jie)(jie)，形(xing)成(cheng)(cheng)回路(lu)，直(zhi)接(jie)(jie)測(ce)溫(wen)端(duan)(duan)(duan)(duan)(duan)叫(jiao)測(ce)量端(duan)(duan)(duan)(duan)(duan)，接(jie)(jie)線(xian)端(duan)(duan)(duan)(duan)(duan)叫(jiao)參(can)比(bi)端(duan)(duan)(duan)(duan)(duan)。當(dang)測(ce)量端(duan)(duan)(duan)(duan)(duan)和(he)(he)參(can)比(bi)端(duan)(duan)(duan)(duan)(duan)存在(zai)溫(wen)差時，就會(hui)在(zai)回路(lu)中(zhong)產(chan)生熱(re)(re)(re)電(dian)(dian)(dian)流，接(jie)(jie)上顯示儀(yi)表，儀(yi)表上就會(hui)指示出熱(re)(re)(re)電(dian)(dian)(dian)偶所產(chan)生的熱(re)(re)(re)電(dian)(dian)(dian)動(dong)勢(shi)(shi)的對(dui)應溫(wen)度值(zhi)。鎧裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)偶的熱(re)(re)(re)電(dian)(dian)(dian)動(dong)勢(shi)(shi)將(jiang)隨著(zhu)測(ce)量端(duan)(duan)(duan)(duan)(duan)的溫(wen)度升高而增長(chang)，熱(re)(re)(re)電(dian)(dian)(dian)動(dong)勢(shi)(shi)的大小只和(he)(he)鎧裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)偶導(dao)(dao)體材質(zhi)以及兩(liang)端(duan)(duan)(duan)(duan)(duan)溫(wen)差有關，和(he)(he)熱(re)(re)(re)電(dian)(dian)(dian)極的長(chang)度，直(zhi)徑無關。鎧裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)偶的結構(gou)是由(you)導(dao)(dao)體，絕緣(yuan)氧化鎂和(he)(he)1Cr18Ni9Ti不銹鋼保(bao)護管經(jing)多次拉制而成(cheng)(cheng)，鎧裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)偶產(chan)品主要由(you)接(jie)(jie)線(xian)盒，接(jie)(jie)線(xian)端(duan)(duan)(duan)(duan)(duan)子和(he)(he)鎧裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)偶組(zu)成(cheng)(cheng)基本結構(gou)，并(bing)配以各種(zhong)安裝(zhuang)(zhuang)固定裝(zhuang)(zhuang)置組(zu)成(cheng)(cheng)。

主要技(ji)術指標

測溫(wen)范圍和準確度(du)

注：1）t為被測溫度的******值。

鎧(kai)裝熱(re)電偶(ou)熱(re)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。

鎧裝熱電偶熱響應時間不大于下表的規定：

絕緣電阻(zu)

當(dang)周圍空氣(qi)溫度為(wei)20±15℃，相對(dui)濕度不(bu)大于(yu)80﹪時，絕緣型鎧裝熱電偶(ou)的偶(ou)絲與外(wai)套管之間的絕緣電阻值應符合(he)下表規定。

型號(hao)表示(shi)