工作原(yuan)理

鎧(kai)裝熱(re)電(dian)(dian)(dian)(dian)偶(ou)的(de)工(gong)作原理是由(you)(you)兩種不同成(cheng)(cheng)(cheng)(cheng)份(fen)的(de)導體兩端(duan)經焊接(jie)(jie)，形(xing)成(cheng)(cheng)(cheng)(cheng)回路，直接(jie)(jie)測溫(wen)(wen)端(duan)叫(jiao)測量端(duan)，接(jie)(jie)線(xian)端(duan)叫(jiao)參(can)比端(duan)。當測量端(duan)和(he)參(can)比端(duan)存在溫(wen)(wen)差(cha)時，就會(hui)在回路中產(chan)生熱(re)電(dian)(dian)(dian)(dian)流，接(jie)(jie)上顯示(shi)儀(yi)表，儀(yi)表上就會(hui)指示(shi)出(chu)熱(re)電(dian)(dian)(dian)(dian)偶(ou)所產(chan)生的(de)熱(re)電(dian)(dian)(dian)(dian)動(dong)(dong)勢的(de)對應溫(wen)(wen)度值。鎧(kai)裝熱(re)電(dian)(dian)(dian)(dian)偶(ou)的(de)熱(re)電(dian)(dian)(dian)(dian)動(dong)(dong)勢將(jiang)隨著(zhu)測量端(duan)的(de)溫(wen)(wen)度升高而增長，熱(re)電(dian)(dian)(dian)(dian)動(dong)(dong)勢的(de)大小只和(he)鎧(kai)裝熱(re)電(dian)(dian)(dian)(dian)偶(ou)導體材質以及(ji)兩端(duan)溫(wen)(wen)差(cha)有關，和(he)熱(re)電(dian)(dian)(dian)(dian)極的(de)長度，直徑無(wu)關。鎧(kai)裝熱(re)電(dian)(dian)(dian)(dian)偶(ou)的(de)結構是由(you)(you)導體，絕(jue)緣氧化(hua)鎂(mei)和(he)1Cr18Ni9Ti不銹鋼(gang)保護(hu)管(guan)經多次拉制而成(cheng)(cheng)(cheng)(cheng)，鎧(kai)裝熱(re)電(dian)(dian)(dian)(dian)偶(ou)產(chan)品主要(yao)由(you)(you)接(jie)(jie)線(xian)盒(he)，接(jie)(jie)線(xian)端(duan)子和(he)鎧(kai)裝熱(re)電(dian)(dian)(dian)(dian)偶(ou)組成(cheng)(cheng)(cheng)(cheng)基本結構，并配以各種安裝固(gu)定裝置組成(cheng)(cheng)(cheng)(cheng)。

主要(yao)技術指標(biao)

測(ce)溫范圍和準(zhun)確度

注：1）t為被(bei)測(ce)溫度(du)的******值。

鎧裝熱電偶熱響(xiang)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(re)電偶熱(re)響應時(shi)間不(bu)大于下表(biao)的規定：

絕緣電阻

當周(zhou)圍空氣溫(wen)度為20±15℃，相對(dui)濕度不大(da)于80﹪時(shi)，絕緣型鎧裝(zhuang)熱電(dian)偶的偶絲與外套(tao)管之間的絕緣電(dian)阻值應符(fu)合下(xia)表規定。

型號表(biao)示