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工(gong)作原理

鎧裝熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)(de)(de)(de)工作原理是由(you)兩(liang)種不同成(cheng)份的(de)(de)(de)(de)導體兩(liang)端(duan)(duan)(duan)經焊接，形成(cheng)回路(lu)，直(zhi)接測(ce)(ce)溫(wen)(wen)端(duan)(duan)(duan)叫(jiao)測(ce)(ce)量(liang)端(duan)(duan)(duan)，接線端(duan)(duan)(duan)叫(jiao)參比端(duan)(duan)(duan)。當(dang)測(ce)(ce)量(liang)端(duan)(duan)(duan)和(he)(he)(he)參比端(duan)(duan)(duan)存在(zai)溫(wen)(wen)差時，就會在(zai)回路(lu)中產(chan)(chan)生(sheng)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)流，接上顯示儀表，儀表上就會指示出熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)所產(chan)(chan)生(sheng)的(de)(de)(de)(de)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)動勢的(de)(de)(de)(de)對應溫(wen)(wen)度(du)值。鎧裝熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)(de)(de)(de)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)動勢將隨著測(ce)(ce)量(liang)端(duan)(duan)(duan)的(de)(de)(de)(de)溫(wen)(wen)度(du)升(sheng)高(gao)而增(zeng)長(chang)，熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)動勢的(de)(de)(de)(de)大小只和(he)(he)(he)鎧裝熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)導體材(cai)質以及兩(liang)端(duan)(duan)(duan)溫(wen)(wen)差有關，和(he)(he)(he)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)極的(de)(de)(de)(de)長(chang)度(du)，直(zhi)徑無(wu)關。鎧裝熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)(de)(de)(de)結(jie)構(gou)是由(you)導體，絕(jue)緣氧(yang)化(hua)鎂和(he)(he)(he)1Cr18Ni9Ti不銹(xiu)鋼保護(hu)管經多次(ci)拉制而成(cheng)，鎧裝熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)產(chan)(chan)品主要(yao)由(you)接線盒(he)，接線端(duan)(duan)(duan)子(zi)和(he)(he)(he)鎧裝熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)組成(cheng)基本結(jie)構(gou)，并(bing)配以各(ge)種安(an)裝固定(ding)裝置組成(cheng)。

主要技術指標

測(ce)溫范圍和準確度

注：1）t為被測溫度的(de)******值。

鎧裝熱(re)電偶熱(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(re)電偶熱(re)響應(ying)時間不大(da)于下表的規定(ding)：

絕緣(yuan)電阻

當周圍空氣溫度(du)為(wei)20±15℃，相對(dui)濕度(du)不大于80﹪時(shi)，絕緣型鎧裝(zhuang)熱電偶的偶絲與外套(tao)管之間(jian)的絕緣電阻值應(ying)符合下表規定。

型號表示(shi)