工(gong)作(zuo)原理

鎧(kai)裝(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶的(de)工作原理是(shi)由(you)兩種不同成(cheng)份的(de)導(dao)體(ti)(ti)兩端(duan)(duan)經焊接(jie)，形成(cheng)回(hui)路(lu)，直接(jie)測溫(wen)(wen)(wen)端(duan)(duan)叫測量端(duan)(duan)，接(jie)線端(duan)(duan)叫參比端(duan)(duan)。當測量端(duan)(duan)和(he)參比端(duan)(duan)存在溫(wen)(wen)(wen)差時(shi)，就會在回(hui)路(lu)中產生熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)流，接(jie)上顯示儀表(biao)，儀表(biao)上就會指示出(chu)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶所產生的(de)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)動勢(shi)的(de)對應溫(wen)(wen)(wen)度值。鎧(kai)裝(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶的(de)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)動勢(shi)將隨著測量端(duan)(duan)的(de)溫(wen)(wen)(wen)度升高而增長，熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)動勢(shi)的(de)大小(xiao)只(zhi)和(he)鎧(kai)裝(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶導(dao)體(ti)(ti)材質(zhi)以(yi)及兩端(duan)(duan)溫(wen)(wen)(wen)差有關，和(he)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)極的(de)長度，直徑(jing)無關。鎧(kai)裝(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶的(de)結構是(shi)由(you)導(dao)體(ti)(ti)，絕緣氧(yang)化鎂和(he)1Cr18Ni9Ti不銹鋼保(bao)護(hu)管經多次拉制而成(cheng)，鎧(kai)裝(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶產品(pin)主要由(you)接(jie)線盒，接(jie)線端(duan)(duan)子和(he)鎧(kai)裝(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶組成(cheng)基(ji)本結構，并配以(yi)各(ge)種安裝(zhuang)固(gu)定裝(zhuang)置(zhi)組成(cheng)。

主要(yao)技術(shu)指標

測溫范圍和準確度(du)

注：1）t為(wei)被測溫(wen)度(du)的******值。

鎧裝熱(re)(re)電偶熱(re)(re)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。

鎧裝熱電(dian)偶熱響(xiang)應時間不大(da)于下表的規定：

絕緣(yuan)電阻

當周圍空(kong)氣溫(wen)度為20±15℃，相對濕度不(bu)大于80﹪時，絕緣型鎧裝熱電偶的(de)偶絲與外套(tao)管之間的(de)絕緣電阻值應符(fu)合下表規定。

型(xing)號(hao)表示