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工作原理(li)

鎧裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)(ou)的工作原理是由(you)(you)兩種(zhong)不同成(cheng)份的導(dao)體兩端(duan)(duan)經焊接，形成(cheng)回(hui)路，直接測(ce)(ce)(ce)溫(wen)(wen)(wen)端(duan)(duan)叫測(ce)(ce)(ce)量端(duan)(duan)，接線(xian)(xian)端(duan)(duan)叫參(can)比端(duan)(duan)。當測(ce)(ce)(ce)量端(duan)(duan)和參(can)比端(duan)(duan)存在溫(wen)(wen)(wen)差時，就會在回(hui)路中產生熱(re)(re)電(dian)(dian)(dian)(dian)流(liu)，接上顯示(shi)儀表，儀表上就會指示(shi)出熱(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)(ou)所產生的熱(re)(re)電(dian)(dian)(dian)(dian)動勢的對應溫(wen)(wen)(wen)度值。鎧裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)(ou)的熱(re)(re)電(dian)(dian)(dian)(dian)動勢將隨(sui)著測(ce)(ce)(ce)量端(duan)(duan)的溫(wen)(wen)(wen)度升(sheng)高(gao)而(er)(er)增(zeng)長，熱(re)(re)電(dian)(dian)(dian)(dian)動勢的大小只和鎧裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)(ou)導(dao)體材質以(yi)及兩端(duan)(duan)溫(wen)(wen)(wen)差有關(guan)，和熱(re)(re)電(dian)(dian)(dian)(dian)極的長度，直徑無(wu)關(guan)。鎧裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)(ou)的結構(gou)是由(you)(you)導(dao)體，絕緣氧化(hua)鎂和1Cr18Ni9Ti不銹鋼保護管(guan)經多(duo)次拉制而(er)(er)成(cheng)，鎧裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)(ou)產品(pin)主要由(you)(you)接線(xian)(xian)盒，接線(xian)(xian)端(duan)(duan)子和鎧裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)(ou)組(zu)成(cheng)基本結構(gou)，并配以(yi)各(ge)種(zhong)安裝(zhuang)(zhuang)固定裝(zhuang)(zhuang)置組(zu)成(cheng)。

主(zhu)要(yao)技術指標

測溫范圍和(he)準確度(du)

注：1）t為被測溫度的******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。

鎧裝熱電(dian)偶(ou)熱響應時間不大于(yu)下表的規定：

絕緣電(dian)阻

當周圍(wei)空(kong)氣溫度(du)為20±15℃，相對濕度(du)不大(da)于80﹪時(shi)，絕(jue)緣型鎧裝熱電(dian)偶(ou)的偶(ou)絲與(yu)外(wai)套管之間的絕(jue)緣電(dian)阻值應符合(he)下(xia)表規(gui)定。

型(xing)號表示