一、熱電偶分度表的溫度基準是什么
熱(re)(re)電(dian)偶分度(du)表(biao)中的(de)參考(kao)端(duan)(duan)溫(wen)(wen)度(du)通常(chang)使用冰(bing)點(dian)溫(wen)(wen)度(du)(0℃)作為基準溫(wen)(wen)度(du)。在進行(xing)熱(re)(re)電(dian)偶校準時(shi),需要將(jiang)測試端(duan)(duan)插入溫(wen)(wen)度(du)控制儀,將(jiang)參考(kao)端(duan)(duan)置于(yu)冰(bing)點(dian)溫(wen)(wen)度(du)處,這樣就可(ke)以得到熱(re)(re)電(dian)偶在不同溫(wen)(wen)度(du)下(xia)的(de)電(dian)勢(shi)值。因此,冰(bing)點(dian)溫(wen)(wen)度(du)可(ke)以作為熱(re)(re)電(dian)偶分度(du)表(biao)的(de)參考(kao)端(duan)(duan)溫(wen)(wen)度(du)。
二、熱電偶分度表怎么看
簡(jian)單的看就是表示(shi):當以(yi)0為(wei)(wei)參(can)考溫度(du)時,測(ce)量(liang)溫度(du)為(wei)(wei)行和列溫度(du)和時,所測(ce)得的熱(re)電勢的值。
左(zuo)邊(bian)的0是(shi)(shi)0度(du)(du)(du)的溫度(du)(du)(du)。0度(du)(du)(du)是(shi)(shi)0mv,10度(du)(du)(du)是(shi)(shi)0.055mv,20度(du)(du)(du)是(shi)(shi)0.113,30度(du)(du)(du)是(shi)(shi)0.173,40度(du)(du)(du)是(shi)(shi)0.235。那么100度(du)(du)(du)對應的zhuanmv值是(shi)(shi)0.645,110度(du)(du)(du)是(shi)(shi)0.719120度(du)(du)(du)是(shi)(shi)0.795,130度(du)(du)(du)是(shi)(shi)0.872,140度(du)(du)(du)是(shi)(shi)0.950。
三、熱電偶分度表怎么讀
熱(re)(re)電(dian)偶分度(du)表讀(du)法是把表中熱(re)(re)電(dian)動勢對應的行和(he)列的溫度(du)相加(jia),即為(wei)該熱(re)(re)電(dian)動勢對應的溫度(du)。
(1)首先仔細地觀察熱電偶分度表就可以看到:
熱(re)電偶(ou)分度(du)表的(de)行(xing):從第(di)四(si)行(xing)第(di)二(er)列起(qi)為100度(du)的(de)整數倍的(de)溫(wen)度(du)下對(dui)應(ying)的(de)熱(re)電動(dong)勢,而(er)第(di)三行(xing)起(qi)是0到90度(du)溫(wen)度(du)下對(dui)應(ying)的(de)熱(re)電動(dong)勢。
熱電(dian)偶分度(du)表的列:從第二列起(qi)為0度(du)到(dao)90度(du)溫度(du)下(xia)對(dui)應(ying)的熱電(dian)動勢。
(2)讀數
例(li)如(ru)表中(zhong)(zhong)第三(san)行(xing)第三(san)列中(zhong)(zhong)的(de)熱(re)電(dian)(dian)(dian)勢(shi)為0.055mv,它所在行(xing)為0到90度(du)(du)溫度(du)(du)下的(de)熱(re)電(dian)(dian)(dian)勢(shi),它所在的(de)列為10度(du)(du)對應(ying)的(de)熱(re)電(dian)(dian)(dian)動(dong)勢(shi),所以把熱(re)電(dian)(dian)(dian)動(dong)勢(shi)0.055mv對應(ying)的(de)行(xing)溫度(du)(du)0"加上"列溫度(du)(du)10即10度(du)(du)即為熱(re)電(dian)(dian)(dian)勢(shi)0.055mv對應(ying)下的(de)溫度(du)(du)。
再舉例(li)第(di)八行第(di)四列(lie)中的(de)熱電(dian)勢(shi)為4.432mv,它所在(zai)行為500到590度(du)(du)(du)溫(wen)度(du)(du)(du)下(xia)的(de)熱電(dian)勢(shi),它所在(zai)的(de)列(lie)為20度(du)(du)(du)對(dui)應的(de)熱電(dian)動(dong)勢(shi),所以把熱電(dian)動(dong)勢(shi)對(dui)應的(de)行溫(wen)度(du)(du)(du)500度(du)(du)(du)"加上"列(lie)溫(wen)度(du)(du)(du)20度(du)(du)(du)即(ji)520度(du)(du)(du)即(ji)為熱電(dian)勢(shi)4.432mv對(dui)應的(de)溫(wen)度(du)(du)(du)。