工(gong)作原理

鎧裝(zhuang)熱(re)電(dian)(dian)(dian)(dian)偶(ou)的(de)(de)工作原理是(shi)由兩(liang)(liang)種不(bu)同(tong)成份的(de)(de)導(dao)體兩(liang)(liang)端(duan)(duan)經焊接(jie)(jie)(jie)，形成回路，直接(jie)(jie)(jie)測(ce)溫端(duan)(duan)叫測(ce)量(liang)端(duan)(duan)，接(jie)(jie)(jie)線(xian)(xian)端(duan)(duan)叫參(can)比端(duan)(duan)。當測(ce)量(liang)端(duan)(duan)和參(can)比端(duan)(duan)存在(zai)溫差時，就(jiu)會(hui)在(zai)回路中產生(sheng)熱(re)電(dian)(dian)(dian)(dian)流，接(jie)(jie)(jie)上顯示(shi)儀表(biao)，儀表(biao)上就(jiu)會(hui)指示(shi)出熱(re)電(dian)(dian)(dian)(dian)偶(ou)所(suo)產生(sheng)的(de)(de)熱(re)電(dian)(dian)(dian)(dian)動(dong)勢(shi)的(de)(de)對應溫度(du)值。鎧裝(zhuang)熱(re)電(dian)(dian)(dian)(dian)偶(ou)的(de)(de)熱(re)電(dian)(dian)(dian)(dian)動(dong)勢(shi)將(jiang)隨著測(ce)量(liang)端(duan)(duan)的(de)(de)溫度(du)升高而增(zeng)長，熱(re)電(dian)(dian)(dian)(dian)動(dong)勢(shi)的(de)(de)大(da)小只和鎧裝(zhuang)熱(re)電(dian)(dian)(dian)(dian)偶(ou)導(dao)體材質以(yi)及兩(liang)(liang)端(duan)(duan)溫差有關，和熱(re)電(dian)(dian)(dian)(dian)極的(de)(de)長度(du)，直徑無關。鎧裝(zhuang)熱(re)電(dian)(dian)(dian)(dian)偶(ou)的(de)(de)結構是(shi)由導(dao)體，絕(jue)緣氧化鎂和1Cr18Ni9Ti不(bu)銹鋼保護管經多(duo)次拉制而成，鎧裝(zhuang)熱(re)電(dian)(dian)(dian)(dian)偶(ou)產品主(zhu)要由接(jie)(jie)(jie)線(xian)(xian)盒，接(jie)(jie)(jie)線(xian)(xian)端(duan)(duan)子和鎧裝(zhuang)熱(re)電(dian)(dian)(dian)(dian)偶(ou)組成基本(ben)結構，并配以(yi)各種安裝(zhuang)固定(ding)裝(zhuang)置(zhi)組成。

主要(yao)技術(shu)指標(biao)

測溫(wen)范圍和準(zhun)確度

注：1）t為被測溫度的******值。

鎧裝熱電偶熱響(xiang)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(re)電(dian)偶熱(re)響(xiang)應時(shi)間不大于下(xia)表的(de)規(gui)定：

絕緣電阻(zu)

當周圍空氣溫度為20±15℃，相對濕度不(bu)大于80﹪時，絕緣(yuan)型鎧裝熱(re)電(dian)偶的偶絲與(yu)外套管之間的絕緣(yuan)電(dian)阻值(zhi)應符合下表規定。

型(xing)號表示