工作原理(li)

鎧(kai)(kai)(kai)裝(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶的工作原理(li)是由兩(liang)(liang)種不同(tong)成(cheng)(cheng)份的導體兩(liang)(liang)端(duan)(duan)經焊接，形成(cheng)(cheng)回(hui)路，直接測溫端(duan)(duan)叫測量端(duan)(duan)，接線端(duan)(duan)叫參(can)比端(duan)(duan)。當測量端(duan)(duan)和參(can)比端(duan)(duan)存在溫差(cha)時，就會在回(hui)路中產(chan)(chan)生熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)流，接上顯示儀(yi)表，儀(yi)表上就會指示出熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶所產(chan)(chan)生的熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)動勢的對應溫度(du)值。鎧(kai)(kai)(kai)裝(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶的熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)動勢將隨(sui)著測量端(duan)(duan)的溫度(du)升高而(er)增長(chang)，熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)動勢的大小只和鎧(kai)(kai)(kai)裝(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶導體材質(zhi)以及兩(liang)(liang)端(duan)(duan)溫差(cha)有(you)關，和熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)的長(chang)度(du)，直徑(jing)無(wu)關。鎧(kai)(kai)(kai)裝(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶的結構是由導體，絕(jue)緣氧化鎂和1Cr18Ni9Ti不銹(xiu)鋼保護管(guan)經多次拉制而(er)成(cheng)(cheng)，鎧(kai)(kai)(kai)裝(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶產(chan)(chan)品主要由接線盒(he)，接線端(duan)(duan)子(zi)和鎧(kai)(kai)(kai)裝(zhuang)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)偶組成(cheng)(cheng)基本結構，并配以各種安裝(zhuang)固定裝(zhuang)置組成(cheng)(cheng)。

主要技術指(zhi)標

測溫范(fan)圍和準(zhun)確度

注：1）t為被測溫(wen)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)偶熱響(xiang)應(ying)時間不大(da)于下(xia)表的規定(ding)：

絕緣電阻

當周(zhou)圍空氣溫度(du)為20±15℃，相對濕度(du)不(bu)大于(yu)80﹪時，絕緣型鎧裝(zhuang)熱(re)電(dian)偶的(de)偶絲與(yu)外套管之間(jian)的(de)絕緣電(dian)阻值應符合下表規定。

型號表示