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工作原(yuan)理

鎧裝(zhuang)(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)(ou)的(de)(de)工作(zuo)原理是由兩種不同成份的(de)(de)導(dao)體(ti)兩端(duan)(duan)(duan)經焊接(jie)，形成回路，直接(jie)測(ce)溫(wen)端(duan)(duan)(duan)叫(jiao)測(ce)量端(duan)(duan)(duan)，接(jie)線(xian)端(duan)(duan)(duan)叫(jiao)參比端(duan)(duan)(duan)。當測(ce)量端(duan)(duan)(duan)和(he)參比端(duan)(duan)(duan)存在溫(wen)差時，就(jiu)會在回路中產(chan)生(sheng)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，接(jie)上顯示(shi)儀(yi)表(biao)，儀(yi)表(biao)上就(jiu)會指示(shi)出熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)(ou)所(suo)產(chan)生(sheng)的(de)(de)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動勢的(de)(de)對(dui)應溫(wen)度值(zhi)。鎧裝(zhuang)(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)(ou)的(de)(de)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動勢將隨著測(ce)量端(duan)(duan)(duan)的(de)(de)溫(wen)度升高而(er)增長，熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動勢的(de)(de)大小只和(he)鎧裝(zhuang)(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)(ou)導(dao)體(ti)材質以及(ji)兩端(duan)(duan)(duan)溫(wen)差有關(guan)，和(he)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極的(de)(de)長度，直徑無關(guan)。鎧裝(zhuang)(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)(ou)的(de)(de)結(jie)構是由導(dao)體(ti)，絕(jue)緣氧化鎂和(he)1Cr18Ni9Ti不銹(xiu)鋼保(bao)護管經多次拉制而(er)成，鎧裝(zhuang)(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)(ou)產(chan)品(pin)主要由接(jie)線(xian)盒，接(jie)線(xian)端(duan)(duan)(duan)子和(he)鎧裝(zhuang)(zhuang)熱(re)(re)(re)(re)(re)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)偶(ou)(ou)(ou)組成基本結(jie)構，并配以各種安裝(zhuang)(zhuang)固定裝(zhuang)(zhuang)置組成。

主要技(ji)術(shu)指標

測溫范圍(wei)和準確度

注：1）t為被測溫度(du)的******值。

鎧裝熱電偶熱響應時間

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)熱電偶熱響應時間不(bu)大于下表的規定：

絕緣電阻(zu)

當周圍空氣溫(wen)度為20±15℃，相對濕度不大于80﹪時，絕緣型鎧裝熱電偶(ou)(ou)的(de)偶(ou)(ou)絲與(yu)外套管之(zhi)間的(de)絕緣電阻值應(ying)符合下表規定。

型號表示