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工作原(yuan)理

鎧(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)工(gong)作原理是(shi)由兩種(zhong)不(bu)同成份的(de)導(dao)體兩端經焊接(jie)(jie)，形成回路(lu)，直接(jie)(jie)測(ce)溫端叫(jiao)測(ce)量(liang)端，接(jie)(jie)線端叫(jiao)參比(bi)(bi)端。當測(ce)量(liang)端和(he)參比(bi)(bi)端存在(zai)(zai)溫差時(shi)，就會在(zai)(zai)回路(lu)中產生(sheng)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)流，接(jie)(jie)上顯示儀表，儀表上就會指示出熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)所(suo)產生(sheng)的(de)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢的(de)對應(ying)溫度值。鎧(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢將隨著測(ce)量(liang)端的(de)溫度升高而增長，熱(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢的(de)大小只和(he)鎧(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)導(dao)體材質(zhi)以(yi)及兩端溫差有關，和(he)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)極的(de)長度，直徑無關。鎧(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)結構是(shi)由導(dao)體，絕緣氧(yang)化鎂和(he)1Cr18Ni9Ti不(bu)銹鋼保護管經多(duo)次拉(la)制而成，鎧(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)產品主(zhu)要(yao)由接(jie)(jie)線盒，接(jie)(jie)線端子(zi)和(he)鎧(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)組成基本結構，并(bing)配以(yi)各種(zhong)安裝(zhuang)(zhuang)固(gu)定裝(zhuang)(zhuang)置組成。

主要(yao)技術指(zhi)標

測溫范(fan)圍和準確度

注：1）t為被測(ce)溫(wen)度(du)的******值。

鎧裝熱電偶熱響應(ying)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。

鎧裝熱電偶熱響(xiang)應時(shi)間不大于下表的規定：

絕緣電(dian)阻

當周圍空氣(qi)溫度為20±15℃，相(xiang)對濕度不大(da)于80﹪時，絕緣(yuan)型鎧裝熱(re)電偶的偶絲與(yu)外套(tao)管之間的絕緣(yuan)電阻值應符合下表(biao)規定(ding)。

型號表示