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工(gong)作原理

鎧(kai)裝(zhuang)(zhuang)熱(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)工作原理是(shi)由兩(liang)種(zhong)(zhong)不(bu)同成(cheng)份的(de)導(dao)體(ti)兩(liang)端(duan)(duan)(duan)經焊接(jie)，形(xing)成(cheng)回(hui)路，直(zhi)接(jie)測(ce)溫端(duan)(duan)(duan)叫(jiao)測(ce)量端(duan)(duan)(duan)，接(jie)線端(duan)(duan)(duan)叫(jiao)參(can)比端(duan)(duan)(duan)。當測(ce)量端(duan)(duan)(duan)和(he)參(can)比端(duan)(duan)(duan)存(cun)在溫差(cha)時(shi)，就會在回(hui)路中產(chan)生熱(re)電(dian)(dian)(dian)(dian)流，接(jie)上顯示儀表(biao)(biao)，儀表(biao)(biao)上就會指(zhi)示出(chu)熱(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)所產(chan)生的(de)熱(re)電(dian)(dian)(dian)(dian)動勢(shi)的(de)對應溫度值。鎧(kai)裝(zhuang)(zhuang)熱(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)熱(re)電(dian)(dian)(dian)(dian)動勢(shi)將(jiang)隨著測(ce)量端(duan)(duan)(duan)的(de)溫度升高(gao)而(er)增長，熱(re)電(dian)(dian)(dian)(dian)動勢(shi)的(de)大小只和(he)鎧(kai)裝(zhuang)(zhuang)熱(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)導(dao)體(ti)材質以(yi)及兩(liang)端(duan)(duan)(duan)溫差(cha)有關，和(he)熱(re)電(dian)(dian)(dian)(dian)極的(de)長度，直(zhi)徑無關。鎧(kai)裝(zhuang)(zhuang)熱(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)結構(gou)是(shi)由導(dao)體(ti)，絕緣(yuan)氧化鎂和(he)1Cr18Ni9Ti不(bu)銹鋼保護管經多次拉制而(er)成(cheng)，鎧(kai)裝(zhuang)(zhuang)熱(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)產(chan)品主要由接(jie)線盒(he)，接(jie)線端(duan)(duan)(duan)子(zi)和(he)鎧(kai)裝(zhuang)(zhuang)熱(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)組成(cheng)基(ji)本結構(gou)，并配以(yi)各種(zhong)(zhong)安(an)裝(zhuang)(zhuang)固定裝(zhuang)(zhuang)置組成(cheng)。

主要技術指標

測溫范圍和準確度

注：1）t為被測溫度(du)的******值(zhi)。

鎧裝熱(re)電偶熱(re)響應時(shi)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(kai)裝熱電偶熱響(xiang)應(ying)時間不大于下(xia)表的規(gui)定(ding)：

絕(jue)緣電(dian)阻

當(dang)周圍空(kong)氣(qi)溫度為(wei)20±15℃，相(xiang)對濕度不(bu)大于(yu)80﹪時，絕(jue)緣型鎧裝(zhuang)熱電(dian)偶的(de)偶絲與外(wai)套管(guan)之(zhi)間的(de)絕(jue)緣電(dian)阻值應符合下(xia)表規(gui)定。

型號表示