工作原理

鎧(kai)裝熱(re)電(dian)(dian)(dian)(dian)偶的(de)(de)(de)工作(zuo)原理是由兩種不同成(cheng)(cheng)份(fen)的(de)(de)(de)導體(ti)兩端(duan)(duan)(duan)(duan)(duan)(duan)經(jing)焊接(jie)，形成(cheng)(cheng)回路(lu)，直接(jie)測溫端(duan)(duan)(duan)(duan)(duan)(duan)叫測量(liang)端(duan)(duan)(duan)(duan)(duan)(duan)，接(jie)線端(duan)(duan)(duan)(duan)(duan)(duan)叫參(can)比端(duan)(duan)(duan)(duan)(duan)(duan)。當測量(liang)端(duan)(duan)(duan)(duan)(duan)(duan)和(he)(he)參(can)比端(duan)(duan)(duan)(duan)(duan)(duan)存在(zai)溫差(cha)時，就會在(zai)回路(lu)中產生熱(re)電(dian)(dian)(dian)(dian)流，接(jie)上(shang)顯示(shi)儀表(biao)，儀表(biao)上(shang)就會指示(shi)出熱(re)電(dian)(dian)(dian)(dian)偶所產生的(de)(de)(de)熱(re)電(dian)(dian)(dian)(dian)動(dong)(dong)勢(shi)的(de)(de)(de)對應溫度值。鎧(kai)裝熱(re)電(dian)(dian)(dian)(dian)偶的(de)(de)(de)熱(re)電(dian)(dian)(dian)(dian)動(dong)(dong)勢(shi)將隨著測量(liang)端(duan)(duan)(duan)(duan)(duan)(duan)的(de)(de)(de)溫度升高而增長(chang)，熱(re)電(dian)(dian)(dian)(dian)動(dong)(dong)勢(shi)的(de)(de)(de)大小只和(he)(he)鎧(kai)裝熱(re)電(dian)(dian)(dian)(dian)偶導體(ti)材質(zhi)以及兩端(duan)(duan)(duan)(duan)(duan)(duan)溫差(cha)有關，和(he)(he)熱(re)電(dian)(dian)(dian)(dian)極的(de)(de)(de)長(chang)度，直徑無關。鎧(kai)裝熱(re)電(dian)(dian)(dian)(dian)偶的(de)(de)(de)結構是由導體(ti)，絕緣(yuan)氧(yang)化鎂和(he)(he)1Cr18Ni9Ti不銹(xiu)鋼保護管經(jing)多(duo)次(ci)拉(la)制而成(cheng)(cheng)，鎧(kai)裝熱(re)電(dian)(dian)(dian)(dian)偶產品主要(yao)由接(jie)線盒，接(jie)線端(duan)(duan)(duan)(duan)(duan)(duan)子和(he)(he)鎧(kai)裝熱(re)電(dian)(dian)(dian)(dian)偶組(zu)成(cheng)(cheng)基本結構，并(bing)配以各種安裝固定裝置組(zu)成(cheng)(cheng)。

主要(yao)技術指標

測溫范(fan)圍和準確度(du)

注：1）t為被測溫度的******值。

鎧裝熱電偶熱響應時間(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(re)電偶熱(re)響應時間(jian)不大于(yu)下表的規定(ding)：

絕(jue)緣電(dian)阻

當周圍空氣溫度為(wei)20±15℃，相對濕度不大于80﹪時，絕緣型鎧裝熱(re)電偶(ou)的偶(ou)絲與外套管(guan)之間的絕緣電阻值應符合下表規定。

型號(hao)表示