工作(zuo)原理

鎧裝(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)的工作原理(li)是(shi)(shi)由兩種(zhong)不(bu)(bu)同(tong)成(cheng)(cheng)份的導(dao)體(ti)兩端經(jing)焊接(jie)(jie)，形成(cheng)(cheng)回(hui)路(lu)，直(zhi)接(jie)(jie)測(ce)溫(wen)(wen)端叫測(ce)量(liang)端，接(jie)(jie)線端叫參比(bi)端。當(dang)測(ce)量(liang)端和(he)參比(bi)端存(cun)在(zai)溫(wen)(wen)差(cha)時，就會在(zai)回(hui)路(lu)中產(chan)(chan)生熱(re)(re)(re)電(dian)(dian)(dian)(dian)流，接(jie)(jie)上(shang)顯示(shi)儀(yi)(yi)表，儀(yi)(yi)表上(shang)就會指示(shi)出熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)所產(chan)(chan)生的熱(re)(re)(re)電(dian)(dian)(dian)(dian)動勢(shi)的對應溫(wen)(wen)度值。鎧裝(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)的熱(re)(re)(re)電(dian)(dian)(dian)(dian)動勢(shi)將隨著測(ce)量(liang)端的溫(wen)(wen)度升高而增(zeng)長，熱(re)(re)(re)電(dian)(dian)(dian)(dian)動勢(shi)的大小只和(he)鎧裝(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)導(dao)體(ti)材(cai)質(zhi)以及兩端溫(wen)(wen)差(cha)有關(guan)(guan)，和(he)熱(re)(re)(re)電(dian)(dian)(dian)(dian)極的長度，直(zhi)徑無(wu)關(guan)(guan)。鎧裝(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)的結構是(shi)(shi)由導(dao)體(ti)，絕緣氧化鎂(mei)和(he)1Cr18Ni9Ti不(bu)(bu)銹鋼(gang)保護管經(jing)多次拉制而成(cheng)(cheng)，鎧裝(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)產(chan)(chan)品主要(yao)由接(jie)(jie)線盒，接(jie)(jie)線端子和(he)鎧裝(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)組成(cheng)(cheng)基(ji)本結構，并(bing)配以各種(zhong)安裝(zhuang)固定裝(zhuang)置(zhi)組成(cheng)(cheng)。

主要技(ji)術指標

測溫范圍和準確度(du)

注(zhu)：1）t為(wei)被測溫度的******值。

鎧裝(zhuang)熱電偶熱響應時(shi)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(ou)熱(re)響應時間(jian)不大于(yu)下表的規定：

絕緣(yuan)電阻

當(dang)周圍空氣溫度為20±15℃，相對濕度不大(da)于80﹪時，絕緣型鎧(kai)裝熱(re)電偶的(de)偶絲與外套管之間的(de)絕緣電阻值應符合下表規定。

型號表示