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工作原理(li)

鎧(kai)裝熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶的(de)(de)工作原(yuan)理是(shi)由兩(liang)種不(bu)同成(cheng)份的(de)(de)導(dao)(dao)體(ti)兩(liang)端經焊(han)接(jie)(jie)(jie)(jie)，形成(cheng)回路，直(zhi)接(jie)(jie)(jie)(jie)測(ce)溫(wen)端叫測(ce)量(liang)(liang)端，接(jie)(jie)(jie)(jie)線(xian)端叫參(can)比端。當(dang)測(ce)量(liang)(liang)端和(he)(he)參(can)比端存在溫(wen)差(cha)時，就(jiu)會在回路中產(chan)(chan)生熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)流，接(jie)(jie)(jie)(jie)上(shang)顯示儀表，儀表上(shang)就(jiu)會指示出熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶所(suo)產(chan)(chan)生的(de)(de)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)動(dong)勢(shi)(shi)的(de)(de)對應溫(wen)度值。鎧(kai)裝熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶的(de)(de)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)動(dong)勢(shi)(shi)將隨(sui)著測(ce)量(liang)(liang)端的(de)(de)溫(wen)度升高而增(zeng)長，熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)動(dong)勢(shi)(shi)的(de)(de)大小只和(he)(he)鎧(kai)裝熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶導(dao)(dao)體(ti)材(cai)質以(yi)及兩(liang)端溫(wen)差(cha)有關，和(he)(he)熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)極的(de)(de)長度，直(zhi)徑無關。鎧(kai)裝熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶的(de)(de)結構是(shi)由導(dao)(dao)體(ti)，絕緣氧化鎂(mei)和(he)(he)1Cr18Ni9Ti不(bu)銹鋼保護管經多(duo)次拉制而成(cheng)，鎧(kai)裝熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶產(chan)(chan)品主(zhu)要(yao)由接(jie)(jie)(jie)(jie)線(xian)盒，接(jie)(jie)(jie)(jie)線(xian)端子和(he)(he)鎧(kai)裝熱(re)(re)(re)(re)電(dian)(dian)(dian)(dian)偶組(zu)成(cheng)基本結構，并配(pei)以(yi)各種安裝固定裝置(zhi)組(zu)成(cheng)。

主要(yao)技術指標

測溫范圍和準確度

注：1）t為(wei)被測溫(wen)度的******值。

鎧裝熱電偶熱響應(ying)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(kai)裝熱電(dian)偶(ou)熱響應(ying)時間不大于下表的規(gui)定：

絕緣(yuan)電阻

當周圍空氣溫度(du)為20±15℃，相對濕度(du)不大于80﹪時，絕(jue)緣型鎧裝熱電(dian)偶的偶絲與外套(tao)管之間(jian)的絕(jue)緣電(dian)阻值應(ying)符合下表(biao)規(gui)定。

型號表示