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工作原理(li)

鎧(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶的(de)工(gong)作原理是(shi)由兩(liang)(liang)種不(bu)同(tong)成(cheng)(cheng)份的(de)導(dao)體(ti)兩(liang)(liang)端(duan)經焊接(jie)，形成(cheng)(cheng)回(hui)路，直接(jie)測溫(wen)端(duan)叫測量(liang)端(duan)，接(jie)線端(duan)叫參比(bi)端(duan)。當測量(liang)端(duan)和(he)參比(bi)端(duan)存(cun)在溫(wen)差時，就會在回(hui)路中產生熱(re)(re)電(dian)(dian)(dian)(dian)流，接(jie)上(shang)顯示儀(yi)表，儀(yi)表上(shang)就會指示出熱(re)(re)電(dian)(dian)(dian)(dian)偶所產生的(de)熱(re)(re)電(dian)(dian)(dian)(dian)動(dong)勢(shi)(shi)的(de)對應(ying)溫(wen)度值。鎧(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶的(de)熱(re)(re)電(dian)(dian)(dian)(dian)動(dong)勢(shi)(shi)將(jiang)隨(sui)著(zhu)測量(liang)端(duan)的(de)溫(wen)度升高而增長，熱(re)(re)電(dian)(dian)(dian)(dian)動(dong)勢(shi)(shi)的(de)大小只和(he)鎧(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶導(dao)體(ti)材質以及兩(liang)(liang)端(duan)溫(wen)差有關，和(he)熱(re)(re)電(dian)(dian)(dian)(dian)極的(de)長度，直徑(jing)無關。鎧(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶的(de)結構(gou)是(shi)由導(dao)體(ti)，絕(jue)緣氧化(hua)鎂(mei)和(he)1Cr18Ni9Ti不(bu)銹鋼保護管經多次拉(la)制而成(cheng)(cheng)，鎧(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶產品主要由接(jie)線盒，接(jie)線端(duan)子和(he)鎧(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶組成(cheng)(cheng)基本結構(gou)，并配以各種安裝(zhuang)(zhuang)固定裝(zhuang)(zhuang)置組成(cheng)(cheng)。

主要技術指標

測溫(wen)范圍(wei)和準確度

注：1）t為(wei)被測溫度(du)的******值。

鎧(kai)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(dian)偶(ou)熱響應時間不大于下(xia)表的(de)規定：

絕緣電阻

當周圍(wei)空氣溫度為20±15℃，相對濕度不大于80﹪時，絕(jue)緣型(xing)鎧裝熱電(dian)偶的偶絲(si)與(yu)外(wai)套管之間的絕(jue)緣電(dian)阻值應符合下表規(gui)定。

型號表(biao)示(shi)