工作原理(li)

鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)工作原理(li)是(shi)由兩(liang)(liang)種(zhong)不同成(cheng)(cheng)份的(de)導體(ti)兩(liang)(liang)端(duan)(duan)(duan)(duan)經(jing)焊接(jie)，形成(cheng)(cheng)回路，直接(jie)測(ce)溫(wen)端(duan)(duan)(duan)(duan)叫測(ce)量(liang)端(duan)(duan)(duan)(duan)，接(jie)線(xian)端(duan)(duan)(duan)(duan)叫參比(bi)(bi)端(duan)(duan)(duan)(duan)。當(dang)測(ce)量(liang)端(duan)(duan)(duan)(duan)和參比(bi)(bi)端(duan)(duan)(duan)(duan)存在溫(wen)差(cha)時，就會(hui)在回路中產生熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)流，接(jie)上顯示儀表(biao)，儀表(biao)上就會(hui)指示出熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)所產生的(de)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢的(de)對應溫(wen)度值。鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢將(jiang)隨著(zhu)測(ce)量(liang)端(duan)(duan)(duan)(duan)的(de)溫(wen)度升(sheng)高(gao)而增長(chang)，熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢的(de)大小只和鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)導體(ti)材質以及兩(liang)(liang)端(duan)(duan)(duan)(duan)溫(wen)差(cha)有關(guan)，和熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)極的(de)長(chang)度，直徑無關(guan)。鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)結構是(shi)由導體(ti)，絕緣氧化鎂和1Cr18Ni9Ti不銹鋼保護管經(jing)多次拉(la)制而成(cheng)(cheng)，鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)產品主要由接(jie)線(xian)盒，接(jie)線(xian)端(duan)(duan)(duan)(duan)子和鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)組成(cheng)(cheng)基本結構，并配以各種(zhong)安裝(zhuang)(zhuang)固定(ding)裝(zhuang)(zhuang)置組成(cheng)(cheng)。

主要技術(shu)指(zhi)標

測溫范(fan)圍和準確度

注(zhu)：1）t為(wei)被測溫度的******值。

鎧裝熱電(dian)偶(ou)熱響應時(shi)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(shi)間(jian)不大于下表的規定：

絕緣電阻

當周(zhou)圍空氣(qi)溫度為20±15℃，相對濕度不大于80﹪時，絕緣(yuan)型(xing)鎧裝熱電偶的(de)偶絲與外套管之間的(de)絕緣(yuan)電阻值應(ying)符合下(xia)表規(gui)定。

型號表示