工(gong)作原理(li)

鎧(kai)裝熱(re)(re)電(dian)(dian)(dian)(dian)偶的(de)(de)工作原理是(shi)由(you)兩種(zhong)不(bu)同成(cheng)(cheng)份的(de)(de)導體(ti)兩端(duan)(duan)(duan)(duan)經(jing)焊接(jie)(jie)，形(xing)成(cheng)(cheng)回(hui)路，直(zhi)接(jie)(jie)測(ce)溫端(duan)(duan)(duan)(duan)叫測(ce)量端(duan)(duan)(duan)(duan)，接(jie)(jie)線(xian)端(duan)(duan)(duan)(duan)叫參比端(duan)(duan)(duan)(duan)。當(dang)測(ce)量端(duan)(duan)(duan)(duan)和(he)參比端(duan)(duan)(duan)(duan)存在(zai)溫差(cha)時，就(jiu)會在(zai)回(hui)路中產(chan)生(sheng)熱(re)(re)電(dian)(dian)(dian)(dian)流，接(jie)(jie)上(shang)顯示(shi)(shi)儀(yi)表，儀(yi)表上(shang)就(jiu)會指示(shi)(shi)出熱(re)(re)電(dian)(dian)(dian)(dian)偶所產(chan)生(sheng)的(de)(de)熱(re)(re)電(dian)(dian)(dian)(dian)動(dong)勢(shi)的(de)(de)對應溫度值。鎧(kai)裝熱(re)(re)電(dian)(dian)(dian)(dian)偶的(de)(de)熱(re)(re)電(dian)(dian)(dian)(dian)動(dong)勢(shi)將隨著測(ce)量端(duan)(duan)(duan)(duan)的(de)(de)溫度升高而增長，熱(re)(re)電(dian)(dian)(dian)(dian)動(dong)勢(shi)的(de)(de)大小(xiao)只和(he)鎧(kai)裝熱(re)(re)電(dian)(dian)(dian)(dian)偶導體(ti)材質以(yi)及兩端(duan)(duan)(duan)(duan)溫差(cha)有(you)關，和(he)熱(re)(re)電(dian)(dian)(dian)(dian)極的(de)(de)長度，直(zhi)徑(jing)無關。鎧(kai)裝熱(re)(re)電(dian)(dian)(dian)(dian)偶的(de)(de)結構是(shi)由(you)導體(ti)，絕緣氧化鎂和(he)1Cr18Ni9Ti不(bu)銹鋼保護管經(jing)多次拉制而成(cheng)(cheng)，鎧(kai)裝熱(re)(re)電(dian)(dian)(dian)(dian)偶產(chan)品主要由(you)接(jie)(jie)線(xian)盒，接(jie)(jie)線(xian)端(duan)(duan)(duan)(duan)子(zi)和(he)鎧(kai)裝熱(re)(re)電(dian)(dian)(dian)(dian)偶組成(cheng)(cheng)基本結構，并配以(yi)各種(zhong)安(an)裝固(gu)定裝置組成(cheng)(cheng)。

主要技術指標(biao)

測溫范圍和(he)準確(que)度

注：1）t為被測溫度的******值。

鎧裝熱電(dian)偶熱響應時間(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。

鎧裝熱電偶熱響應時間不大于(yu)下表(biao)的規定：

絕(jue)緣電阻(zu)

當周圍空氣(qi)溫度為20±15℃，相對濕度不大于80﹪時，絕緣型鎧(kai)裝(zhuang)熱電(dian)偶(ou)的偶(ou)絲與外套管之間的絕緣電(dian)阻值應符合下表規定。

型號表示