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工(gong)作原(yuan)理

鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)偶(ou)的工(gong)作原理是由兩種不同成(cheng)(cheng)份的導(dao)體兩端(duan)(duan)(duan)(duan)經(jing)焊接，形成(cheng)(cheng)回路，直接測溫(wen)端(duan)(duan)(duan)(duan)叫(jiao)測量(liang)端(duan)(duan)(duan)(duan)，接線端(duan)(duan)(duan)(duan)叫(jiao)參(can)(can)比端(duan)(duan)(duan)(duan)。當測量(liang)端(duan)(duan)(duan)(duan)和(he)參(can)(can)比端(duan)(duan)(duan)(duan)存(cun)在(zai)溫(wen)差時，就會(hui)在(zai)回路中產生熱(re)(re)(re)電(dian)(dian)(dian)流，接上顯示儀表，儀表上就會(hui)指(zhi)示出熱(re)(re)(re)電(dian)(dian)(dian)偶(ou)所產生的熱(re)(re)(re)電(dian)(dian)(dian)動勢(shi)的對應溫(wen)度值。鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)偶(ou)的熱(re)(re)(re)電(dian)(dian)(dian)動勢(shi)將隨著測量(liang)端(duan)(duan)(duan)(duan)的溫(wen)度升高而(er)增長，熱(re)(re)(re)電(dian)(dian)(dian)動勢(shi)的大小(xiao)只和(he)鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)偶(ou)導(dao)體材質(zhi)以(yi)及(ji)兩端(duan)(duan)(duan)(duan)溫(wen)差有關，和(he)熱(re)(re)(re)電(dian)(dian)(dian)極(ji)的長度，直徑無(wu)關。鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)偶(ou)的結構是由導(dao)體，絕緣氧(yang)化鎂和(he)1Cr18Ni9Ti不銹鋼保(bao)護管經(jing)多次拉制而(er)成(cheng)(cheng)，鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)偶(ou)產品主要由接線盒，接線端(duan)(duan)(duan)(duan)子(zi)和(he)鎧(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)偶(ou)組成(cheng)(cheng)基本結構，并(bing)配以(yi)各(ge)種安裝(zhuang)(zhuang)固定裝(zhuang)(zhuang)置組成(cheng)(cheng)。

主(zhu)要技術指(zhi)標

測溫范圍和(he)準(zhun)確度

注：1）t為被測溫度的******值(zhi)。

鎧裝熱(re)(re)電偶熱(re)(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(zhuang)熱電偶(ou)熱響應時間不大于(yu)下表的規定：

絕緣電阻

當(dang)周圍空(kong)氣溫度(du)為20±15℃，相對濕度(du)不大于80﹪時，絕緣型鎧裝(zhuang)熱電(dian)偶的偶絲與外套(tao)管之間(jian)的絕緣電(dian)阻值應符合(he)下(xia)表(biao)規定(ding)。

型號表示