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工作原(yuan)理

鎧(kai)裝(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)(de)工作原理是由(you)兩(liang)種不同成(cheng)份的(de)(de)導(dao)體(ti)兩(liang)端(duan)(duan)(duan)經焊接(jie)(jie)(jie)，形成(cheng)回(hui)路，直接(jie)(jie)(jie)測溫(wen)端(duan)(duan)(duan)叫(jiao)測量端(duan)(duan)(duan)，接(jie)(jie)(jie)線端(duan)(duan)(duan)叫(jiao)參比端(duan)(duan)(duan)。當測量端(duan)(duan)(duan)和參比端(duan)(duan)(duan)存(cun)在溫(wen)差時(shi)，就(jiu)會(hui)在回(hui)路中產生(sheng)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)流，接(jie)(jie)(jie)上(shang)顯示儀(yi)表，儀(yi)表上(shang)就(jiu)會(hui)指示出熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)所產生(sheng)的(de)(de)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢的(de)(de)對應溫(wen)度(du)(du)值(zhi)。鎧(kai)裝(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)(de)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢將隨著測量端(duan)(duan)(duan)的(de)(de)溫(wen)度(du)(du)升高而(er)增(zeng)長(chang)，熱(re)(re)電(dian)(dian)(dian)(dian)(dian)動勢的(de)(de)大小只和鎧(kai)裝(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)導(dao)體(ti)材質(zhi)以及(ji)兩(liang)端(duan)(duan)(duan)溫(wen)差有關，和熱(re)(re)電(dian)(dian)(dian)(dian)(dian)極的(de)(de)長(chang)度(du)(du)，直徑(jing)無關。鎧(kai)裝(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)的(de)(de)結(jie)構是由(you)導(dao)體(ti)，絕緣氧化鎂和1Cr18Ni9Ti不銹鋼保護管(guan)經多(duo)次拉制而(er)成(cheng)，鎧(kai)裝(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)產品主要(yao)由(you)接(jie)(jie)(jie)線盒，接(jie)(jie)(jie)線端(duan)(duan)(duan)子和鎧(kai)裝(zhuang)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)偶(ou)組(zu)成(cheng)基本結(jie)構，并配(pei)以各種安(an)裝(zhuang)固定裝(zhuang)置(zhi)組(zu)成(cheng)。

主要技術指標

測溫范圍(wei)和準確度(du)

注：1）t為(wei)被測溫度(du)的******值。

鎧裝熱電偶熱響(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(kai)裝熱電(dian)偶熱響應時(shi)間不大(da)于下表的規定：

絕緣電阻

當周(zhou)圍(wei)空氣(qi)溫度(du)為(wei)20±15℃，相對濕度(du)不大于80﹪時，絕(jue)緣型鎧(kai)裝熱電偶的偶絲與外套管之間的絕(jue)緣電阻值應符合下(xia)表規(gui)定。

型號表示