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工作原理(li)

鎧裝(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)工(gong)作(zuo)原理(li)是由兩種不(bu)同成份的(de)導(dao)體(ti)(ti)兩端經焊(han)接(jie)，形成回路，直接(jie)測溫端叫(jiao)(jiao)測量端，接(jie)線(xian)端叫(jiao)(jiao)參比(bi)端。當(dang)測量端和參比(bi)端存在溫差(cha)時，就(jiu)會在回路中產(chan)生熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)流，接(jie)上(shang)顯(xian)示(shi)儀(yi)表(biao)，儀(yi)表(biao)上(shang)就(jiu)會指示(shi)出熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)所產(chan)生的(de)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動(dong)勢的(de)對應溫度值。鎧裝(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動(dong)勢將隨著測量端的(de)溫度升高(gao)而(er)(er)增長，熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動(dong)勢的(de)大(da)小只和鎧裝(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)導(dao)體(ti)(ti)材質(zhi)以及兩端溫差(cha)有關(guan)，和熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)極的(de)長度，直徑無(wu)關(guan)。鎧裝(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)結(jie)構是由導(dao)體(ti)(ti)，絕緣(yuan)氧化鎂(mei)和1Cr18Ni9Ti不(bu)銹鋼(gang)保護管經多次拉(la)制而(er)(er)成，鎧裝(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)產(chan)品主要(yao)由接(jie)線(xian)盒，接(jie)線(xian)端子和鎧裝(zhuang)(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)組成基本(ben)結(jie)構，并(bing)配以各種安裝(zhuang)(zhuang)固定裝(zhuang)(zhuang)置組成。

主要(yao)技術指標

測溫范圍和準(zhun)確(que)度

注：1）t為(wei)被測溫(wen)度的******值。

鎧裝熱電(dian)偶熱響應時(shi)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(ou)熱響(xiang)應時(shi)間不大于(yu)下表(biao)的規定：

絕緣電阻

當周圍空氣溫(wen)度(du)為20±15℃，相對濕度(du)不大于(yu)80﹪時，絕(jue)緣(yuan)型鎧裝熱電偶的(de)偶絲與外(wai)套管之間的(de)絕(jue)緣(yuan)電阻(zu)值應符合(he)下表(biao)規定。

型號表(biao)示