工(gong)作原理

鎧裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)的(de)(de)工作原理是由兩(liang)種(zhong)不(bu)同成份的(de)(de)導(dao)體(ti)兩(liang)端(duan)(duan)(duan)(duan)經焊(han)接(jie)(jie)，形成回路(lu)，直接(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(bi)端(duan)(duan)(duan)(duan)。當(dang)測(ce)量端(duan)(duan)(duan)(duan)和(he)參比(bi)端(duan)(duan)(duan)(duan)存在溫差時，就會在回路(lu)中產生(sheng)熱(re)(re)(re)電(dian)(dian)(dian)(dian)流，接(jie)(jie)上(shang)顯示儀表，儀表上(shang)就會指(zhi)示出(chu)熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)所產生(sheng)的(de)(de)熱(re)(re)(re)電(dian)(dian)(dian)(dian)動勢的(de)(de)對應溫度(du)值(zhi)。鎧裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)的(de)(de)熱(re)(re)(re)電(dian)(dian)(dian)(dian)動勢將隨著測(ce)量端(duan)(duan)(duan)(duan)的(de)(de)溫度(du)升(sheng)高而(er)(er)增長(chang)，熱(re)(re)(re)電(dian)(dian)(dian)(dian)動勢的(de)(de)大小只和(he)鎧裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)導(dao)體(ti)材(cai)質以及(ji)兩(liang)端(duan)(duan)(duan)(duan)溫差有關，和(he)熱(re)(re)(re)電(dian)(dian)(dian)(dian)極的(de)(de)長(chang)度(du)，直徑無關。鎧裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)的(de)(de)結構是由導(dao)體(ti)，絕(jue)緣氧(yang)化鎂和(he)1Cr18Ni9Ti不(bu)銹鋼保護(hu)管經多次(ci)拉制(zhi)而(er)(er)成，鎧裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)產品主要由接(jie)(jie)線(xian)盒，接(jie)(jie)線(xian)端(duan)(duan)(duan)(duan)子和(he)鎧裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)組成基本結構，并配以各種(zhong)安裝(zhuang)(zhuang)固定(ding)裝(zhuang)(zhuang)置組成。

主(zhu)要技(ji)術指(zhi)標

測溫范圍和準(zhun)確度

注(zhu)：1）t為被測溫(wen)度的******值。

鎧裝熱電偶(ou)熱響應時間

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(zhuang)熱電(dian)偶熱響應時間不大于下(xia)表的規定：

絕緣電阻

當周圍空氣溫度為20±15℃，相對濕度不(bu)大(da)于80﹪時，絕緣(yuan)型鎧(kai)裝(zhuang)熱電(dian)偶的偶絲(si)與外套管之間的絕緣(yuan)電(dian)阻值應(ying)符(fu)合下表規定(ding)。

型號(hao)表示