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工作原(yuan)理

鎧(kai)(kai)裝熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶的工作原(yuan)理是由兩種不同成(cheng)(cheng)份的導體兩端(duan)(duan)(duan)(duan)經(jing)焊接(jie)，形成(cheng)(cheng)回路，直接(jie)測(ce)(ce)溫端(duan)(duan)(duan)(duan)叫測(ce)(ce)量端(duan)(duan)(duan)(duan)，接(jie)線端(duan)(duan)(duan)(duan)叫參比端(duan)(duan)(duan)(duan)。當(dang)測(ce)(ce)量端(duan)(duan)(duan)(duan)和參比端(duan)(duan)(duan)(duan)存在(zai)溫差時，就會在(zai)回路中(zhong)產(chan)生熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)流，接(jie)上顯示(shi)儀表(biao)，儀表(biao)上就會指示(shi)出熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶所產(chan)生的熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)動勢(shi)(shi)的對(dui)應溫度值。鎧(kai)(kai)裝熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶的熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)動勢(shi)(shi)將隨(sui)著測(ce)(ce)量端(duan)(duan)(duan)(duan)的溫度升高而(er)增長，熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)動勢(shi)(shi)的大小只和鎧(kai)(kai)裝熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶導體材質以及兩端(duan)(duan)(duan)(duan)溫差有關，和熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)極(ji)的長度，直徑(jing)無關。鎧(kai)(kai)裝熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶的結構是由導體，絕緣氧化(hua)鎂和1Cr18Ni9Ti不銹鋼保(bao)護管經(jing)多次拉制而(er)成(cheng)(cheng)，鎧(kai)(kai)裝熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶產(chan)品(pin)主(zhu)要由接(jie)線盒，接(jie)線端(duan)(duan)(duan)(duan)子和鎧(kai)(kai)裝熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶組成(cheng)(cheng)基本結構，并配以各種安裝固定裝置組成(cheng)(cheng)。

主要技(ji)術指標

測溫范(fan)圍和(he)準確度(du)

注：1）t為被測(ce)溫度的******值。

鎧(kai)裝熱電偶熱響(xiang)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(dian)偶熱響應時(shi)間(jian)不大于下(xia)表的規定：

絕緣(yuan)電(dian)阻

當(dang)周圍(wei)空氣(qi)溫度為20±15℃，相對濕度不大于80﹪時，絕緣型(xing)鎧(kai)裝(zhuang)熱電偶(ou)的偶(ou)絲與外套(tao)管(guan)之間的絕緣電阻值應符合(he)下表規定。

型號(hao)表示