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工作原(yuan)理

鎧(kai)裝(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)(de)工作原(yuan)理(li)是(shi)由(you)兩種(zhong)不(bu)同(tong)成(cheng)(cheng)份的(de)(de)導體兩端(duan)(duan)經(jing)焊(han)接(jie)(jie)，形成(cheng)(cheng)回路(lu)(lu)，直接(jie)(jie)測(ce)溫(wen)(wen)(wen)端(duan)(duan)叫測(ce)量(liang)端(duan)(duan)，接(jie)(jie)線端(duan)(duan)叫參(can)比端(duan)(duan)。當(dang)測(ce)量(liang)端(duan)(duan)和(he)參(can)比端(duan)(duan)存在溫(wen)(wen)(wen)差時(shi)，就會(hui)在回路(lu)(lu)中產生熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)流，接(jie)(jie)上顯示儀表(biao)，儀表(biao)上就會(hui)指示出熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)所(suo)產生的(de)(de)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)動勢的(de)(de)對應溫(wen)(wen)(wen)度(du)值。鎧(kai)裝(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)(de)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)動勢將隨著測(ce)量(liang)端(duan)(duan)的(de)(de)溫(wen)(wen)(wen)度(du)升高(gao)而增長，熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)動勢的(de)(de)大小只和(he)鎧(kai)裝(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)導體材(cai)質以(yi)及(ji)兩端(duan)(duan)溫(wen)(wen)(wen)差有關，和(he)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)極的(de)(de)長度(du)，直徑無關。鎧(kai)裝(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)的(de)(de)結構(gou)是(shi)由(you)導體，絕緣氧(yang)化鎂和(he)1Cr18Ni9Ti不(bu)銹鋼保護管經(jing)多次拉(la)制而成(cheng)(cheng)，鎧(kai)裝(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)產品主要由(you)接(jie)(jie)線盒(he)，接(jie)(jie)線端(duan)(duan)子和(he)鎧(kai)裝(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)組(zu)成(cheng)(cheng)基本結構(gou)，并(bing)配以(yi)各種(zhong)安裝(zhuang)固定(ding)裝(zhuang)置(zhi)組(zu)成(cheng)(cheng)。

主要技術指(zhi)標

測溫范圍和(he)準確度

注：1）t為被測溫(wen)度的******值。

鎧裝熱電(dian)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(zhuang)熱電偶熱響應(ying)時(shi)間(jian)不大于(yu)下表(biao)的(de)規(gui)定：

絕緣(yuan)電(dian)阻

當周圍空氣溫度(du)為20±15℃，相對濕度(du)不(bu)大于80﹪時(shi)，絕緣(yuan)型鎧裝熱(re)電偶的偶絲與外套管之間的絕緣(yuan)電阻值應符(fu)合下表規(gui)定。

型號(hao)表示