工作原理(li)

鎧(kai)(kai)(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)(de)(de)工作原理是由兩種不同(tong)成(cheng)(cheng)(cheng)份的(de)(de)(de)導體兩端(duan)經焊接(jie)(jie)，形成(cheng)(cheng)(cheng)回路，直(zhi)(zhi)接(jie)(jie)測溫(wen)端(duan)叫測量端(duan)，接(jie)(jie)線端(duan)叫參比(bi)端(duan)。當測量端(duan)和參比(bi)端(duan)存在溫(wen)差(cha)時(shi)，就會(hui)在回路中產(chan)生(sheng)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)流，接(jie)(jie)上顯示儀(yi)表，儀(yi)表上就會(hui)指示出熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)所產(chan)生(sheng)的(de)(de)(de)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢的(de)(de)(de)對應溫(wen)度(du)值。鎧(kai)(kai)(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)(de)(de)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢將(jiang)隨著測量端(duan)的(de)(de)(de)溫(wen)度(du)升高(gao)而增長(chang)，熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢的(de)(de)(de)大(da)小只和鎧(kai)(kai)(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)導體材質以及兩端(duan)溫(wen)差(cha)有關(guan)，和熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)極的(de)(de)(de)長(chang)度(du)，直(zhi)(zhi)徑(jing)無關(guan)。鎧(kai)(kai)(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)(de)(de)結(jie)構(gou)是由導體，絕緣(yuan)氧化(hua)鎂和1Cr18Ni9Ti不銹鋼保護管(guan)經多次拉制(zhi)而成(cheng)(cheng)(cheng)，鎧(kai)(kai)(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)產(chan)品主要由接(jie)(jie)線盒(he)，接(jie)(jie)線端(duan)子和鎧(kai)(kai)(kai)裝(zhuang)(zhuang)熱(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)組(zu)(zu)成(cheng)(cheng)(cheng)基本結(jie)構(gou)，并配以各種安裝(zhuang)(zhuang)固定裝(zhuang)(zhuang)置(zhi)組(zu)(zu)成(cheng)(cheng)(cheng)。

主要技(ji)術指標

測溫范圍和準(zhun)確度

注：1）t為(wei)被測溫度的******值。

鎧裝(zhuang)熱電偶熱響應時間

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)偶熱響應時間不大于下(xia)表(biao)的(de)規定：

絕緣電阻

當周圍空氣溫度為20±15℃，相對(dui)濕(shi)度不(bu)大于80﹪時，絕緣(yuan)型鎧裝熱電(dian)偶(ou)的(de)偶(ou)絲與外套管之間的(de)絕緣(yuan)電(dian)阻值應(ying)符(fu)合下(xia)表(biao)規定。

型號表(biao)示