工(gong)作原理

鎧(kai)(kai)(kai)裝(zhuang)(zhuang)熱(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)工(gong)作原(yuan)理是由兩(liang)種不同成份(fen)的(de)導體(ti)兩(liang)端(duan)經焊接(jie)(jie)，形成回(hui)路，直接(jie)(jie)測溫(wen)端(duan)叫(jiao)測量(liang)端(duan)，接(jie)(jie)線(xian)端(duan)叫(jiao)參(can)比端(duan)。當測量(liang)端(duan)和參(can)比端(duan)存在(zai)溫(wen)差時，就會在(zai)回(hui)路中(zhong)產生熱(re)電(dian)(dian)(dian)(dian)(dian)流(liu)，接(jie)(jie)上顯示儀(yi)表，儀(yi)表上就會指示出熱(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)所產生的(de)熱(re)電(dian)(dian)(dian)(dian)(dian)動(dong)勢的(de)對應溫(wen)度值。鎧(kai)(kai)(kai)裝(zhuang)(zhuang)熱(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)熱(re)電(dian)(dian)(dian)(dian)(dian)動(dong)勢將(jiang)隨著(zhu)測量(liang)端(duan)的(de)溫(wen)度升(sheng)高而(er)增長(chang)，熱(re)電(dian)(dian)(dian)(dian)(dian)動(dong)勢的(de)大(da)小只(zhi)和鎧(kai)(kai)(kai)裝(zhuang)(zhuang)熱(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)導體(ti)材質以及(ji)兩(liang)端(duan)溫(wen)差有關，和熱(re)電(dian)(dian)(dian)(dian)(dian)極的(de)長(chang)度，直徑無(wu)關。鎧(kai)(kai)(kai)裝(zhuang)(zhuang)熱(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)結構(gou)是由導體(ti)，絕緣(yuan)氧化鎂和1Cr18Ni9Ti不銹鋼保護管經多次拉制而(er)成，鎧(kai)(kai)(kai)裝(zhuang)(zhuang)熱(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)產品主(zhu)要由接(jie)(jie)線(xian)盒(he)，接(jie)(jie)線(xian)端(duan)子(zi)和鎧(kai)(kai)(kai)裝(zhuang)(zhuang)熱(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)組成基本結構(gou)，并配以各種安裝(zhuang)(zhuang)固定裝(zhuang)(zhuang)置組成。

主要(yao)技術(shu)指標(biao)

測溫范圍(wei)和準確度(du)

注：1）t為被(bei)測溫(wen)度的******值(zhi)。

鎧裝熱(re)電偶熱(re)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(dian)偶熱響應時間不大于下表(biao)的規定：

絕緣(yuan)電阻(zu)

當(dang)周(zhou)圍空氣(qi)溫度為20±15℃，相(xiang)對濕度不大(da)于(yu)80﹪時，絕緣型鎧裝(zhuang)熱電(dian)偶(ou)的(de)偶(ou)絲與外套管(guan)之間的(de)絕緣電(dian)阻值應(ying)符合下表規(gui)定。

型號表示