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工(gong)作(zuo)原(yuan)理

鎧裝(zhuang)(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶的(de)(de)工(gong)作原理(li)是由(you)兩種(zhong)不同成(cheng)份的(de)(de)導(dao)體(ti)兩端(duan)經焊接(jie)，形成(cheng)回路(lu)，直接(jie)測(ce)(ce)溫(wen)(wen)(wen)端(duan)叫(jiao)測(ce)(ce)量端(duan)，接(jie)線(xian)端(duan)叫(jiao)參比(bi)端(duan)。當測(ce)(ce)量端(duan)和(he)參比(bi)端(duan)存在(zai)(zai)溫(wen)(wen)(wen)差時，就會(hui)(hui)在(zai)(zai)回路(lu)中(zhong)產(chan)生(sheng)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)流，接(jie)上顯示(shi)(shi)儀(yi)表，儀(yi)表上就會(hui)(hui)指示(shi)(shi)出(chu)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶所產(chan)生(sheng)的(de)(de)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)動勢(shi)的(de)(de)對(dui)應溫(wen)(wen)(wen)度值。鎧裝(zhuang)(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶的(de)(de)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)動勢(shi)將隨(sui)著測(ce)(ce)量端(duan)的(de)(de)溫(wen)(wen)(wen)度升高而(er)增長，熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)動勢(shi)的(de)(de)大小只和(he)鎧裝(zhuang)(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶導(dao)體(ti)材質(zhi)以及兩端(duan)溫(wen)(wen)(wen)差有關(guan)，和(he)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)極的(de)(de)長度，直徑(jing)無關(guan)。鎧裝(zhuang)(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶的(de)(de)結構是由(you)導(dao)體(ti)，絕(jue)緣氧(yang)化鎂和(he)1Cr18Ni9Ti不銹鋼(gang)保護管經多次拉制而(er)成(cheng)，鎧裝(zhuang)(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶產(chan)品(pin)主要(yao)由(you)接(jie)線(xian)盒，接(jie)線(xian)端(duan)子(zi)和(he)鎧裝(zhuang)(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶組成(cheng)基本結構，并配以各種(zhong)安裝(zhuang)(zhuang)固定裝(zhuang)(zhuang)置(zhi)組成(cheng)。

主要技(ji)術指標(biao)

測(ce)溫范圍(wei)和準(zhun)確度

注：1）t為被測溫度的******值。

鎧(kai)裝熱電偶熱響(xiang)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(kai)裝熱(re)電偶熱(re)響應時(shi)間(jian)不大于下表的規定：

絕緣電阻

當周圍空氣溫度為20±15℃，相對濕(shi)度不(bu)大(da)于80﹪時(shi)，絕緣型鎧裝熱(re)電偶的偶絲與外套(tao)管(guan)之間的絕緣電阻值應符合下表規(gui)定(ding)。

型號表示