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工作(zuo)原理(li)

鎧(kai)(kai)裝(zhuang)(zhuang)熱(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)(de)工(gong)作(zuo)原理(li)是(shi)由兩(liang)(liang)種不(bu)同(tong)成(cheng)份的(de)(de)導體(ti)(ti)兩(liang)(liang)端(duan)(duan)經焊(han)接(jie)，形(xing)成(cheng)回(hui)路(lu)，直接(jie)測溫(wen)端(duan)(duan)叫測量(liang)端(duan)(duan)，接(jie)線(xian)(xian)端(duan)(duan)叫參(can)比(bi)端(duan)(duan)。當測量(liang)端(duan)(duan)和(he)參(can)比(bi)端(duan)(duan)存在(zai)溫(wen)差時，就會在(zai)回(hui)路(lu)中產(chan)生(sheng)熱(re)電(dian)(dian)(dian)(dian)(dian)流，接(jie)上顯示(shi)(shi)儀(yi)表(biao)，儀(yi)表(biao)上就會指示(shi)(shi)出熱(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)所產(chan)生(sheng)的(de)(de)熱(re)電(dian)(dian)(dian)(dian)(dian)動(dong)勢(shi)的(de)(de)對應溫(wen)度值。鎧(kai)(kai)裝(zhuang)(zhuang)熱(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)(de)熱(re)電(dian)(dian)(dian)(dian)(dian)動(dong)勢(shi)將隨著(zhu)測量(liang)端(duan)(duan)的(de)(de)溫(wen)度升高(gao)而(er)增長(chang)，熱(re)電(dian)(dian)(dian)(dian)(dian)動(dong)勢(shi)的(de)(de)大小只和(he)鎧(kai)(kai)裝(zhuang)(zhuang)熱(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)導體(ti)(ti)材質(zhi)以及兩(liang)(liang)端(duan)(duan)溫(wen)差有關，和(he)熱(re)電(dian)(dian)(dian)(dian)(dian)極的(de)(de)長(chang)度，直徑(jing)無關。鎧(kai)(kai)裝(zhuang)(zhuang)熱(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)(de)結構是(shi)由導體(ti)(ti)，絕緣氧化鎂和(he)1Cr18Ni9Ti不(bu)銹鋼保(bao)護管(guan)經多次拉制(zhi)而(er)成(cheng)，鎧(kai)(kai)裝(zhuang)(zhuang)熱(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)產(chan)品主要由接(jie)線(xian)(xian)盒(he)，接(jie)線(xian)(xian)端(duan)(duan)子和(he)鎧(kai)(kai)裝(zhuang)(zhuang)熱(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)組成(cheng)基本結構，并配(pei)以各種安(an)裝(zhuang)(zhuang)固定裝(zhuang)(zhuang)置組成(cheng)。

主要技(ji)術指標

測(ce)溫范圍和準確度

注：1）t為被(bei)測溫度的******值。

鎧(kai)裝熱(re)電偶熱(re)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。

鎧裝熱電(dian)偶(ou)熱響應時間不大于(yu)下表的規定：

絕緣電(dian)阻

當周圍空氣溫度(du)為20±15℃，相(xiang)對濕度(du)不大(da)于80﹪時，絕緣(yuan)型鎧裝熱電偶的偶絲(si)與(yu)外套管之間的絕緣(yuan)電阻(zu)值應符合下(xia)表規定。

型號表示