工(gong)作原理

鎧(kai)裝(zhuang)(zhuang)(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶(ou)的(de)工作原理(li)是由兩種不同(tong)成(cheng)份的(de)導體兩端(duan)(duan)(duan)(duan)經焊(han)接(jie)，形成(cheng)回路，直(zhi)接(jie)測(ce)溫(wen)(wen)端(duan)(duan)(duan)(duan)叫(jiao)測(ce)量(liang)端(duan)(duan)(duan)(duan)，接(jie)線(xian)(xian)端(duan)(duan)(duan)(duan)叫(jiao)參(can)比端(duan)(duan)(duan)(duan)。當測(ce)量(liang)端(duan)(duan)(duan)(duan)和(he)參(can)比端(duan)(duan)(duan)(duan)存在溫(wen)(wen)差時，就(jiu)(jiu)會在回路中產生熱(re)(re)電(dian)(dian)(dian)(dian)流，接(jie)上(shang)顯示(shi)儀表(biao)(biao)，儀表(biao)(biao)上(shang)就(jiu)(jiu)會指示(shi)出(chu)熱(re)(re)電(dian)(dian)(dian)(dian)偶(ou)所產生的(de)熱(re)(re)電(dian)(dian)(dian)(dian)動(dong)勢(shi)的(de)對應溫(wen)(wen)度值。鎧(kai)裝(zhuang)(zhuang)(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶(ou)的(de)熱(re)(re)電(dian)(dian)(dian)(dian)動(dong)勢(shi)將(jiang)隨著測(ce)量(liang)端(duan)(duan)(duan)(duan)的(de)溫(wen)(wen)度升高而(er)(er)增長，熱(re)(re)電(dian)(dian)(dian)(dian)動(dong)勢(shi)的(de)大小只和(he)鎧(kai)裝(zhuang)(zhuang)(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶(ou)導體材質以(yi)(yi)及(ji)兩端(duan)(duan)(duan)(duan)溫(wen)(wen)差有關，和(he)熱(re)(re)電(dian)(dian)(dian)(dian)極的(de)長度，直(zhi)徑無關。鎧(kai)裝(zhuang)(zhuang)(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶(ou)的(de)結構是由導體，絕緣氧化鎂和(he)1Cr18Ni9Ti不銹鋼保護(hu)管經多次拉(la)制而(er)(er)成(cheng)，鎧(kai)裝(zhuang)(zhuang)(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶(ou)產品主要(yao)由接(jie)線(xian)(xian)盒，接(jie)線(xian)(xian)端(duan)(duan)(duan)(duan)子和(he)鎧(kai)裝(zhuang)(zhuang)(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶(ou)組成(cheng)基本結構，并配(pei)以(yi)(yi)各種安裝(zhuang)(zhuang)(zhuang)(zhuang)固定裝(zhuang)(zhuang)(zhuang)(zhuang)置組成(cheng)。

主要(yao)技術(shu)指標

測溫范(fan)圍和準確度

注：1）t為被測溫度的******值。

鎧裝(zhuang)熱電(dian)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(kai)裝熱(re)電偶熱(re)響應時間不大于下表的規定(ding)：

絕緣電阻

當周圍(wei)空氣溫(wen)度為20±15℃，相對濕度不大于80﹪時(shi)，絕緣(yuan)型鎧裝熱電偶的偶絲與外套(tao)管之(zhi)間(jian)的絕緣(yuan)電阻值應符合下表規定。

型(xing)號表示(shi)