工作原理

鎧(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的工(gong)作原(yuan)理(li)是由(you)兩種(zhong)不同成(cheng)份的導體(ti)兩端(duan)(duan)經焊接(jie)(jie)，形成(cheng)回(hui)路，直(zhi)接(jie)(jie)測(ce)溫端(duan)(duan)叫(jiao)測(ce)量(liang)端(duan)(duan)，接(jie)(jie)線(xian)端(duan)(duan)叫(jiao)參比端(duan)(duan)。當測(ce)量(liang)端(duan)(duan)和(he)(he)(he)(he)參比端(duan)(duan)存(cun)在(zai)溫差時，就(jiu)會在(zai)回(hui)路中產(chan)生熱(re)(re)電(dian)(dian)(dian)(dian)(dian)流，接(jie)(jie)上顯(xian)示儀表，儀表上就(jiu)會指示出熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)所產(chan)生的熱(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢的對應溫度(du)(du)(du)值。鎧(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的熱(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢將(jiang)隨著測(ce)量(liang)端(duan)(duan)的溫度(du)(du)(du)升高而增長，熱(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢的大小只和(he)(he)(he)(he)鎧(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)導體(ti)材質以(yi)及兩端(duan)(duan)溫差有關(guan)，和(he)(he)(he)(he)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)極的長度(du)(du)(du)，直(zhi)徑無關(guan)。鎧(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的結構是由(you)導體(ti)，絕緣氧化(hua)鎂和(he)(he)(he)(he)1Cr18Ni9Ti不銹(xiu)鋼保護管經多(duo)次拉(la)制而成(cheng)，鎧(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)產(chan)品主(zhu)要由(you)接(jie)(jie)線(xian)盒，接(jie)(jie)線(xian)端(duan)(duan)子和(he)(he)(he)(he)鎧(kai)裝(zhuang)(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)組成(cheng)基本結構，并配以(yi)各(ge)種(zhong)安裝(zhuang)(zhuang)固定裝(zhuang)(zhuang)置組成(cheng)。

主要技術(shu)指(zhi)標

測溫范圍(wei)和準確度

注(zhu)：1）t為被測(ce)溫度的******值。

鎧(kai)裝熱電偶熱響應時間(jian)

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。

鎧裝熱電偶熱響應時(shi)間不(bu)大(da)于下表的規定：

絕緣電阻

當周圍空氣溫度為(wei)20±15℃，相對濕度不大于80﹪時，絕(jue)緣(yuan)(yuan)型鎧(kai)裝(zhuang)熱電偶的偶絲(si)與外套管之間(jian)的絕(jue)緣(yuan)(yuan)電阻值應符合下表(biao)規(gui)定。

型號(hao)表示(shi)