工作(zuo)原理(li)

鎧(kai)(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的工(gong)作原理是由(you)兩(liang)種不同成(cheng)(cheng)份的導體(ti)兩(liang)端(duan)經(jing)焊接，形成(cheng)(cheng)回(hui)路，直接測溫(wen)端(duan)叫測量(liang)端(duan)，接線端(duan)叫參比端(duan)。當測量(liang)端(duan)和(he)(he)(he)參比端(duan)存在溫(wen)差(cha)時(shi)，就會(hui)在回(hui)路中產(chan)生(sheng)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)流，接上顯示(shi)儀表，儀表上就會(hui)指示(shi)出熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)所(suo)產(chan)生(sheng)的熱(re)(re)電(dian)(dian)(dian)(dian)(dian)動(dong)(dong)勢的對應溫(wen)度(du)值。鎧(kai)(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的熱(re)(re)電(dian)(dian)(dian)(dian)(dian)動(dong)(dong)勢將隨(sui)著測量(liang)端(duan)的溫(wen)度(du)升高而增(zeng)長，熱(re)(re)電(dian)(dian)(dian)(dian)(dian)動(dong)(dong)勢的大小只和(he)(he)(he)鎧(kai)(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)導體(ti)材質(zhi)以及兩(liang)端(duan)溫(wen)差(cha)有關，和(he)(he)(he)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)極(ji)的長度(du)，直徑無關。鎧(kai)(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的結構是由(you)導體(ti)，絕緣(yuan)氧化鎂(mei)和(he)(he)(he)1Cr18Ni9Ti不銹鋼保護管經(jing)多次拉(la)制而成(cheng)(cheng)，鎧(kai)(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)產(chan)品(pin)主要(yao)由(you)接線盒，接線端(duan)子和(he)(he)(he)鎧(kai)(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)組(zu)成(cheng)(cheng)基本結構，并配以各(ge)種安裝(zhuang)(zhuang)固(gu)定裝(zhuang)(zhuang)置組(zu)成(cheng)(cheng)。

主要技術指標

測(ce)溫范圍和準確度

注：1）t為被測溫度的(de)******值(zhi)。

鎧裝熱電(dian)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(kai)裝(zhuang)熱電偶熱響應(ying)時間不(bu)大(da)于(yu)下(xia)表的規(gui)定：

絕(jue)緣電(dian)阻

當周圍空氣溫(wen)度為20±15℃，相對濕度不大于80﹪時，絕緣(yuan)型鎧裝熱電偶(ou)的偶(ou)絲(si)與外套管之(zhi)間的絕緣(yuan)電阻值應符合下表(biao)規定。

型號表(biao)示